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_gbp(self):
""" Group Based Policy """
nat_table = VppIpTable(self, 20)
nat_table.add_vpp_config()
nat_table = VppIpTable(self, 20, is_ip6=True)
nat_table.add_vpp_config()
#
# Bridge Domains
#
self.vapi.bridge_domain_add_del(1,
flood=1,
uu_flood=1,
forward=1,
learn=0,
arp_term=1,
is_add=1)
self.vapi.bridge_domain_add_del(2,
flood=1,
uu_flood=1,
forward=1,
learn=0,
arp_term=1,
is_add=1)
self.vapi.bridge_domain_add_del(20,
flood=1,
uu_flood=1,
forward=1,
learn=0,
arp_term=1,
is_add=1)
#
# 3 EPGs, 2 of which share a BD.
#
epgs = []
recircs = []
epgs.append(
VppGbpEndpointGroup(self, 220, 0, 1, self.pg4, self.loop0,
"10.0.0.128", "2001:10::128"))
recircs.append(VppGbpRecirc(self, epgs[0], self.loop3))
epgs.append(
VppGbpEndpointGroup(self, 221, 0, 1, self.pg5, self.loop0,
"10.0.1.128", "2001:10:1::128"))
recircs.append(VppGbpRecirc(self, epgs[1], self.loop4))
epgs.append(
VppGbpEndpointGroup(self, 222, 0, 2, self.pg6, self.loop1,
"10.0.2.128", "2001:10:2::128"))
recircs.append(VppGbpRecirc(self, epgs[2], self.loop5))
#
# 2 NAT EPGs, one for floating-IP subnets, the other for internet
#
epgs.append(
VppGbpEndpointGroup(self, 333, 20, 20, self.pg7, self.loop2,
"11.0.0.128", "3001::128"))
recircs.append(VppGbpRecirc(self, epgs[3], self.loop6, is_ext=True))
epgs.append(
VppGbpEndpointGroup(self, 444, 20, 20, self.pg8, self.loop2,
"11.0.0.129", "3001::129"))
recircs.append(VppGbpRecirc(self, epgs[4], self.loop8, is_ext=True))
epg_nat = epgs[3]
recirc_nat = recircs[3]
#
# 4 end-points, 2 in the same subnet, 3 in the same BD
#
eps = []
eps.append(
VppGbpEndpoint(self, self.pg0, epgs[0], recircs[0], "10.0.0.1",
"11.0.0.1"))
eps.append(
VppGbpEndpoint(self, self.pg1, epgs[0], recircs[0], "10.0.0.2",
"11.0.0.2"))
eps.append(
VppGbpEndpoint(self, self.pg2, epgs[1], recircs[1], "10.0.1.1",
"11.0.0.3"))
eps.append(
VppGbpEndpoint(self, self.pg3, epgs[2], recircs[2], "10.0.2.1",
"11.0.0.4"))
eps.append(
VppGbpEndpoint(self,
self.pg0,
epgs[0],
recircs[0],
"2001:10::1",
"3001::1",
is_ip6=True))
eps.append(
VppGbpEndpoint(self,
self.pg1,
epgs[0],
recircs[0],
"2001:10::2",
"3001::2",
is_ip6=True))
eps.append(
VppGbpEndpoint(self,
self.pg2,
epgs[1],
recircs[1],
"2001:10:1::1",
"3001::3",
is_ip6=True))
eps.append(
VppGbpEndpoint(self,
self.pg3,
epgs[2],
recircs[2],
"2001:10:2::1",
"3001::4",
is_ip6=True))
#
# Config related to each of the EPGs
#
for epg in epgs:
# IP config on the BVI interfaces
if epg != epgs[1] and epg != epgs[4]:
epg.bvi.set_table_ip4(epg.rd)
epg.bvi.set_table_ip6(epg.rd)
# The BVIs are NAT inside interfaces
self.vapi.nat44_interface_add_del_feature(epg.bvi.sw_if_index,
is_inside=1,
is_add=1)
self.vapi.nat66_add_del_interface(epg.bvi.sw_if_index,
is_inside=1,
is_add=1)
self.vapi.sw_interface_add_del_address(epg.bvi.sw_if_index,
epg.bvi_ip4_n, 32)
self.vapi.sw_interface_add_del_address(epg.bvi.sw_if_index,
epg.bvi_ip6_n,
128,
is_ipv6=True)
# EPG uplink interfaces in the BD
epg.uplink.set_table_ip4(epg.rd)
epg.uplink.set_table_ip6(epg.rd)
self.vapi.sw_interface_set_l2_bridge(epg.uplink.sw_if_index,
epg.bd)
# add the BD ARP termination entry for BVI IP
self.vapi.bd_ip_mac_add_del(bd_id=epg.bd,
mac=mactobinary(self.router_mac),
ip=epg.bvi_ip4_n,
is_ipv6=0,
is_add=1)
self.vapi.bd_ip_mac_add_del(bd_id=epg.bd,
mac=mactobinary(self.router_mac),
ip=epg.bvi_ip6_n,
is_ipv6=1,
is_add=1)
# epg[1] shares the same BVI to epg[0]
if epg != epgs[1] and epg != epgs[4]:
# BVI in BD
self.vapi.sw_interface_set_l2_bridge(epg.bvi.sw_if_index,
epg.bd,
bvi=1)
# BVI L2 FIB entry
self.vapi.l2fib_add_del(self.router_mac,
epg.bd,
epg.bvi.sw_if_index,
is_add=1,
bvi_mac=1)
# EPG in VPP
epg.add_vpp_config()
for recirc in recircs:
# EPG's ingress recirculation interface maps to its RD
recirc.recirc.set_table_ip4(recirc.epg.rd)
recirc.recirc.set_table_ip6(recirc.epg.rd)
# in the bridge to allow DVR. L2 emulation to punt to L3
self.vapi.sw_interface_set_l2_bridge(recirc.recirc.sw_if_index,
recirc.epg.bd)
self.vapi.sw_interface_set_l2_emulation(recirc.recirc.sw_if_index)
self.vapi.nat44_interface_add_del_feature(
recirc.recirc.sw_if_index, is_inside=0, is_add=1)
self.vapi.nat66_add_del_interface(recirc.recirc.sw_if_index,
is_inside=0,
is_add=1)
recirc.add_vpp_config()
ep_routes = []
ep_arps = []
for ep in eps:
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
#
# routes to the endpoints. We need these since there are no
# adj-fibs due to the fact the the BVI address has /32 and
# the subnet is not attached.
#
r = VppIpRoute(
self,
ep.ip,
ep.ip_len,
[VppRoutePath(ep.ip, ep.epg.bvi.sw_if_index, proto=ep.proto)],
is_ip6=ep.is_ip6)
r.add_vpp_config()
ep_routes.append(r)
#
# ARP entries for the endpoints
#
a = VppNeighbor(self,
ep.epg.bvi.sw_if_index,
ep.itf.remote_mac,
ep.ip,
af=ep.af)
a.add_vpp_config()
ep_arps.append(a)
# add each EP itf to the its BD
self.vapi.sw_interface_set_l2_bridge(ep.itf.sw_if_index, ep.epg.bd)
# add the BD ARP termination entry
self.vapi.bd_ip_mac_add_del(bd_id=ep.epg.bd,
mac=ep.bin_mac,
ip=ep.ip_n,
is_ipv6=0,
is_add=1)
# L2 FIB entry
self.vapi.l2fib_add_del(ep.mac,
ep.epg.bd,
ep.itf.sw_if_index,
is_add=1)
# Add static mappings for each EP from the 10/8 to 11/8 network
if ep.af == AF_INET:
self.vapi.nat44_add_del_static_mapping(ep.ip_n,
ep.floating_ip_n,
vrf_id=0,
addr_only=1)
else:
self.vapi.nat66_add_del_static_mapping(ep.ip_n,
ep.floating_ip_n,
vrf_id=0)
# VPP EP create ...
ep.add_vpp_config()
# ... results in a Gratuitous ARP/ND on the EPG's uplink
rx = ep.epg.uplink.get_capture(1, timeout=0.2)
if ep.is_ip6:
self.assertTrue(rx[0].haslayer(ICMPv6ND_NA))
self.assertEqual(rx[0][ICMPv6ND_NA].tgt, ep.ip)
else:
self.assertTrue(rx[0].haslayer(ARP))
self.assertEqual(rx[0][ARP].psrc, ep.ip)
self.assertEqual(rx[0][ARP].pdst, ep.ip)
# add the BD ARP termination entry for floating IP
self.vapi.bd_ip_mac_add_del(bd_id=epg_nat.bd,
mac=ep.bin_mac,
ip=ep.floating_ip_n,
is_ipv6=ep.is_ip6,
is_add=1)
# floating IPs route via EPG recirc
r = VppIpRoute(self,
ep.floating_ip,
ep.ip_len, [
VppRoutePath(ep.floating_ip,
ep.recirc.recirc.sw_if_index,
is_dvr=1,
proto=ep.proto)
],
table_id=20,
is_ip6=ep.is_ip6)
r.add_vpp_config()
ep_routes.append(r)
# L2 FIB entries in the NAT EPG BD to bridge the packets from
# the outside direct to the internal EPG
self.vapi.l2fib_add_del(ep.mac,
epg_nat.bd,
ep.recirc.recirc.sw_if_index,
is_add=1)
#
# ARP packets for unknown IP are flooded
#
pkt_arp = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) /
ARP(op="who-has",
hwdst="ff:ff:ff:ff:ff:ff",
hwsrc=self.pg0.remote_mac,
pdst=epgs[0].bvi_ip4,
psrc="10.0.0.88"))
self.send_and_expect(self.pg0, [pkt_arp], self.pg0)
#
# ARP/ND packets get a response
#
pkt_arp = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) /
ARP(op="who-has",
hwdst="ff:ff:ff:ff:ff:ff",
hwsrc=self.pg0.remote_mac,
pdst=epgs[0].bvi_ip4,
psrc=eps[0].ip))
self.send_and_expect(self.pg0, [pkt_arp], self.pg0)
nsma = in6_getnsma(inet_pton(AF_INET6, eps[4].ip))
d = inet_ntop(AF_INET6, nsma)
pkt_nd = (Ether(dst=in6_getnsmac(nsma)) / IPv6(dst=d, src=eps[4].ip) /
ICMPv6ND_NS(tgt=epgs[0].bvi_ip6) /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac))
self.send_and_expect(self.pg0, [pkt_nd], self.pg0)
#
# broadcast packets are flooded
#
pkt_bcast = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg0.remote_mac) /
IP(src=eps[0].ip, dst="232.1.1.1") /
UDP(sport=1234, dport=1234) / Raw('\xa5' * 100))
self.vapi.cli("clear trace")
self.pg0.add_stream(pkt_bcast)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rxd = eps[1].itf.get_capture(1)
self.assertEqual(rxd[0][Ether].dst, pkt_bcast[Ether].dst)
rxd = epgs[0].uplink.get_capture(1)
self.assertEqual(rxd[0][Ether].dst, pkt_bcast[Ether].dst)
#
# packets to non-local L3 destinations dropped
#
pkt_intra_epg_220_ip4 = (
Ether(src=self.pg0.remote_mac, dst=self.router_mac) /
IP(src=eps[0].ip, dst="10.0.0.99") / UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
pkt_inter_epg_222_ip4 = (
Ether(src=self.pg0.remote_mac, dst=self.router_mac) /
IP(src=eps[0].ip, dst="10.0.1.99") / UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
self.send_and_assert_no_replies(self.pg0, pkt_intra_epg_220_ip4 * 65)
pkt_inter_epg_222_ip6 = (
Ether(src=self.pg0.remote_mac, dst=self.router_mac) /
IPv6(src=eps[4].ip, dst="2001:10::99") /
UDP(sport=1234, dport=1234) / Raw('\xa5' * 100))
self.send_and_assert_no_replies(self.pg0, pkt_inter_epg_222_ip6 * 65)
#
# Add the subnet routes
#
s41 = VppGbpSubnet(self, 0, "10.0.0.0", 24)
s42 = VppGbpSubnet(self, 0, "10.0.1.0", 24)
s43 = VppGbpSubnet(self, 0, "10.0.2.0", 24)
s41.add_vpp_config()
s42.add_vpp_config()
s43.add_vpp_config()
s61 = VppGbpSubnet(self, 0, "2001:10::1", 64, is_ip6=True)
s62 = VppGbpSubnet(self, 0, "2001:10:1::1", 64, is_ip6=True)
s63 = VppGbpSubnet(self, 0, "2001:10:2::1", 64, is_ip6=True)
s61.add_vpp_config()
s62.add_vpp_config()
s63.add_vpp_config()
self.send_and_expect_bridged(self.pg0, pkt_intra_epg_220_ip4 * 65,
self.pg4)
self.send_and_expect_bridged(self.pg3, pkt_inter_epg_222_ip4 * 65,
self.pg6)
self.send_and_expect_bridged6(self.pg3, pkt_inter_epg_222_ip6 * 65,
self.pg6)
self.logger.info(self.vapi.cli("sh ip fib 11.0.0.2"))
self.logger.info(self.vapi.cli("sh gbp endpoint-group"))
self.logger.info(self.vapi.cli("sh gbp endpoint"))
self.logger.info(self.vapi.cli("sh gbp recirc"))
self.logger.info(self.vapi.cli("sh int"))
self.logger.info(self.vapi.cli("sh int addr"))
self.logger.info(self.vapi.cli("sh int feat loop6"))
self.logger.info(self.vapi.cli("sh vlib graph ip4-gbp-src-classify"))
self.logger.info(self.vapi.cli("sh int feat loop3"))
#
# Packet destined to unknown unicast is sent on the epg uplink ...
#
pkt_intra_epg_220_to_uplink = (
Ether(src=self.pg0.remote_mac, dst="00:00:00:33:44:55") /
IP(src=eps[0].ip, dst="10.0.0.99") / UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
self.send_and_expect_bridged(self.pg0,
pkt_intra_epg_220_to_uplink * 65,
self.pg4)
# ... and nowhere else
self.pg1.get_capture(0, timeout=0.1)
self.pg1.assert_nothing_captured(remark="Flood onto other VMS")
pkt_intra_epg_221_to_uplink = (
Ether(src=self.pg2.remote_mac, dst="00:00:00:33:44:66") /
IP(src=eps[0].ip, dst="10.0.0.99") / UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
self.send_and_expect_bridged(self.pg2,
pkt_intra_epg_221_to_uplink * 65,
self.pg5)
#
# Packets from the uplink are forwarded in the absence of a contract
#
pkt_intra_epg_220_from_uplink = (
Ether(src="00:00:00:33:44:55", dst=self.pg0.remote_mac) /
IP(src=eps[0].ip, dst="10.0.0.99") / UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
self.send_and_expect_bridged(self.pg4,
pkt_intra_epg_220_from_uplink * 65,
self.pg0)
#
# in the absence of policy, endpoints in the same EPG
# can communicate
#
pkt_intra_epg = (
Ether(src=self.pg0.remote_mac, dst=self.pg1.remote_mac) /
IP(src=eps[0].ip, dst=eps[1].ip) / UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
self.send_and_expect_bridged(self.pg0, pkt_intra_epg * 65, self.pg1)
#
# in the abscense of policy, endpoints in the different EPG
# cannot communicate
#
pkt_inter_epg_220_to_221 = (
Ether(src=self.pg0.remote_mac, dst=self.pg2.remote_mac) /
IP(src=eps[0].ip, dst=eps[2].ip) / UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
pkt_inter_epg_221_to_220 = (
Ether(src=self.pg2.remote_mac, dst=self.pg0.remote_mac) /
IP(src=eps[2].ip, dst=eps[0].ip) / UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
pkt_inter_epg_220_to_222 = (
Ether(src=self.pg0.remote_mac, dst=self.router_mac) /
IP(src=eps[0].ip, dst=eps[3].ip) / UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
self.send_and_assert_no_replies(self.pg0,
pkt_inter_epg_220_to_221 * 65)
self.send_and_assert_no_replies(self.pg0,
pkt_inter_epg_220_to_222 * 65)
#
# A uni-directional contract from EPG 220 -> 221
#
c1 = VppGbpContract(self, 220, 221, 0)
c1.add_vpp_config()
self.send_and_expect_bridged(self.pg0, pkt_inter_epg_220_to_221 * 65,
self.pg2)
self.send_and_assert_no_replies(self.pg0,
pkt_inter_epg_220_to_222 * 65)
#
# contract for the return direction
#
c2 = VppGbpContract(self, 221, 220, 0)
c2.add_vpp_config()
self.send_and_expect_bridged(self.pg0, pkt_inter_epg_220_to_221 * 65,
self.pg2)
self.send_and_expect_bridged(self.pg2, pkt_inter_epg_221_to_220 * 65,
self.pg0)
#
# check that inter group is still disabled for the groups
# not in the contract.
#
self.send_and_assert_no_replies(self.pg0,
pkt_inter_epg_220_to_222 * 65)
#
# A uni-directional contract from EPG 220 -> 222 'L3 routed'
#
c3 = VppGbpContract(self, 220, 222, 0)
c3.add_vpp_config()
self.logger.info(self.vapi.cli("sh gbp contract"))
self.send_and_expect_routed(self.pg0, pkt_inter_epg_220_to_222 * 65,
self.pg3, self.router_mac)
#
# remove both contracts, traffic stops in both directions
#
c2.remove_vpp_config()
c1.remove_vpp_config()
c3.remove_vpp_config()
self.send_and_assert_no_replies(self.pg2,
pkt_inter_epg_221_to_220 * 65)
self.send_and_assert_no_replies(self.pg0,
pkt_inter_epg_220_to_221 * 65)
self.send_and_expect_bridged(self.pg0, pkt_intra_epg * 65, self.pg1)
#
# EPs to the outside world
#
# in the EP's RD an external subnet via the NAT EPG's recirc
se1 = VppGbpSubnet(self,
0,
"0.0.0.0",
0,
is_internal=False,
sw_if_index=recirc_nat.recirc.sw_if_index,
epg=epg_nat.epg)
se1.add_vpp_config()
se2 = VppGbpSubnet(self,
0,
"11.0.0.0",
8,
is_internal=False,
sw_if_index=recirc_nat.recirc.sw_if_index,
epg=epg_nat.epg)
se2.add_vpp_config()
se16 = VppGbpSubnet(self,
0,
"::",
0,
is_internal=False,
sw_if_index=recirc_nat.recirc.sw_if_index,
epg=epg_nat.epg,
is_ip6=True)
se16.add_vpp_config()
# in the NAT RD an external subnet via the NAT EPG's uplink
se3 = VppGbpSubnet(self,
20,
"0.0.0.0",
0,
is_internal=False,
sw_if_index=epg_nat.uplink.sw_if_index,
epg=epg_nat.epg)
se36 = VppGbpSubnet(self,
20,
"::",
0,
is_internal=False,
sw_if_index=epg_nat.uplink.sw_if_index,
epg=epg_nat.epg,
is_ip6=True)
se4 = VppGbpSubnet(self,
20,
"11.0.0.0",
8,
is_internal=False,
sw_if_index=epg_nat.uplink.sw_if_index,
epg=epg_nat.epg)
se3.add_vpp_config()
se36.add_vpp_config()
se4.add_vpp_config()
self.logger.info(self.vapi.cli("sh ip fib 0.0.0.0/0"))
self.logger.info(self.vapi.cli("sh ip fib 11.0.0.1"))
self.logger.info(self.vapi.cli("sh ip6 fib ::/0"))
self.logger.info(self.vapi.cli("sh ip6 fib %s" % eps[4].floating_ip))
#
# From an EP to an outside addess: IN2OUT
#
pkt_inter_epg_220_to_global = (
Ether(src=self.pg0.remote_mac, dst=self.router_mac) /
IP(src=eps[0].ip, dst="1.1.1.1") / UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
# no policy yet
self.send_and_assert_no_replies(self.pg0,
pkt_inter_epg_220_to_global * 65)
c4 = VppGbpContract(self, 220, 333, 0)
c4.add_vpp_config()
self.send_and_expect_natted(self.pg0, pkt_inter_epg_220_to_global * 65,
self.pg7, eps[0].floating_ip)
pkt_inter_epg_220_to_global = (
Ether(src=self.pg0.remote_mac, dst=self.router_mac) /
IPv6(src=eps[4].ip, dst="6001::1") / UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
self.send_and_expect_natted6(self.pg0,
pkt_inter_epg_220_to_global * 65,
self.pg7, eps[4].floating_ip)
#
# From a global address to an EP: OUT2IN
#
pkt_inter_epg_220_from_global = (
Ether(src=self.router_mac, dst=self.pg0.remote_mac) /
IP(dst=eps[0].floating_ip, src="1.1.1.1") /
UDP(sport=1234, dport=1234) / Raw('\xa5' * 100))
self.send_and_assert_no_replies(self.pg7,
pkt_inter_epg_220_from_global * 65)
c5 = VppGbpContract(self, 333, 220, 0)
c5.add_vpp_config()
self.send_and_expect_unnatted(self.pg7,
pkt_inter_epg_220_from_global * 65,
eps[0].itf, eps[0].ip)
pkt_inter_epg_220_from_global = (
Ether(src=self.router_mac, dst=self.pg0.remote_mac) /
IPv6(dst=eps[4].floating_ip, src="6001::1") /
UDP(sport=1234, dport=1234) / Raw('\xa5' * 100))
self.send_and_expect_unnatted6(self.pg7,
pkt_inter_epg_220_from_global * 65,
eps[4].itf, eps[4].ip)
#
# From a local VM to another local VM using resp. public addresses:
# IN2OUT2IN
#
pkt_intra_epg_220_global = (
Ether(src=self.pg0.remote_mac, dst=self.router_mac) /
IP(src=eps[0].ip, dst=eps[1].floating_ip) /
UDP(sport=1234, dport=1234) / Raw('\xa5' * 100))
self.send_and_expect_double_natted(eps[0].itf,
pkt_intra_epg_220_global * 65,
eps[1].itf, eps[0].floating_ip,
eps[1].ip)
pkt_intra_epg_220_global = (
Ether(src=self.pg4.remote_mac, dst=self.router_mac) /
IPv6(src=eps[4].ip, dst=eps[5].floating_ip) /
UDP(sport=1234, dport=1234) / Raw('\xa5' * 100))
self.send_and_expect_double_natted6(eps[4].itf,
pkt_intra_epg_220_global * 65,
eps[5].itf, eps[4].floating_ip,
eps[5].ip)
#
# cleanup
#
for ep in eps:
# del static mappings for each EP from the 10/8 to 11/8 network
if ep.af == AF_INET:
self.vapi.nat44_add_del_static_mapping(ep.ip_n,
ep.floating_ip_n,
vrf_id=0,
addr_only=1,
is_add=0)
else:
self.vapi.nat66_add_del_static_mapping(ep.ip_n,
ep.floating_ip_n,
vrf_id=0,
is_add=0)
for epg in epgs:
# IP config on the BVI interfaces
self.vapi.sw_interface_add_del_address(epg.bvi.sw_if_index,
epg.bvi_ip4_n,
32,
is_add=0)
self.vapi.sw_interface_add_del_address(epg.bvi.sw_if_index,
epg.bvi_ip6_n,
128,
is_add=0,
is_ipv6=True)
self.logger.info(self.vapi.cli("sh int addr"))
epg.uplink.set_table_ip4(0)
epg.uplink.set_table_ip6(0)
if epg != epgs[0] and epg != epgs[3]:
epg.bvi.set_table_ip4(0)
epg.bvi.set_table_ip6(0)
self.vapi.nat44_interface_add_del_feature(epg.bvi.sw_if_index,
is_inside=1,
is_add=0)
self.vapi.nat66_add_del_interface(epg.bvi.sw_if_index,
is_inside=1,
is_add=0)
for recirc in recircs:
recirc.recirc.set_table_ip4(0)
recirc.recirc.set_table_ip6(0)
self.vapi.nat44_interface_add_del_feature(
recirc.recirc.sw_if_index, is_inside=0, is_add=0)
self.vapi.nat66_add_del_interface(recirc.recirc.sw_if_index,
is_inside=0,
is_add=0)
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(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_arp(self):
""" ARP """
#
# Generate some hosts on the LAN
#
self.pg1.generate_remote_hosts(4)
#
# 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))
#
# ERROR Cases
# 1 - don't respond to ARP request for address not within the
# 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,
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")
#
# 2 - don't respond to ARP request from an address not within the
# 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")
#
# 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
# the router
#
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")
#
# cleanup
#
dyn_arp.remove_vpp_config()
static_arp.remove_vpp_config()
def test_dhcp6_proxy(self):
""" DHCPv6 Proxy"""
#
# Verify no response to DHCP request without DHCP config
#
dhcp_solicit_dst = "ff02::1:2"
dhcp_solicit_src_vrf0 = mk_ll_addr(self.pg2.remote_mac)
dhcp_solicit_src_vrf1 = mk_ll_addr(self.pg3.remote_mac)
server_addr_vrf0 = self.pg0.remote_ip6n
src_addr_vrf0 = self.pg0.local_ip6n
server_addr_vrf1 = self.pg1.remote_ip6n
src_addr_vrf1 = self.pg1.local_ip6n
dmac = in6_getnsmac(inet_pton(socket.AF_INET6, dhcp_solicit_dst))
p_solicit_vrf0 = (
Ether(dst=dmac, src=self.pg2.remote_mac) /
IPv6(src=dhcp_solicit_src_vrf0, dst=dhcp_solicit_dst) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_CLIENT_PORT) /
DHCP6_Solicit())
p_solicit_vrf1 = (
Ether(dst=dmac, src=self.pg3.remote_mac) /
IPv6(src=dhcp_solicit_src_vrf1, dst=dhcp_solicit_dst) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_CLIENT_PORT) /
DHCP6_Solicit())
self.send_and_assert_no_replies(self.pg2, p_solicit_vrf0,
"DHCP with no configuration")
self.send_and_assert_no_replies(self.pg3, p_solicit_vrf1,
"DHCP with no configuration")
#
# DHCPv6 config in VRF 0.
# Packets still dropped because the client facing interface has no
# IPv6 config
#
self.vapi.dhcp_proxy_config(server_addr_vrf0,
src_addr_vrf0,
rx_table_id=0,
server_table_id=0,
is_ipv6=1)
self.send_and_assert_no_replies(self.pg2, p_solicit_vrf0,
"DHCP with no configuration")
self.send_and_assert_no_replies(self.pg3, p_solicit_vrf1,
"DHCP with no configuration")
#
# configure an IP address on the client facing interface
#
self.pg2.config_ip6()
#
# Now the DHCP requests are relayed to the server
#
self.pg2.add_stream(p_solicit_vrf0)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
self.verify_dhcp6_solicit(rx[0], self.pg0, dhcp_solicit_src_vrf0,
self.pg2.remote_mac)
#
# Exception cases for rejected relay responses
#
# 1 - not a relay reply
p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_Advertise())
self.send_and_assert_no_replies(self.pg2, p_adv_vrf0,
"DHCP6 not a relay reply")
# 2 - no relay message option
p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_RelayReply() / DHCP6_Advertise())
self.send_and_assert_no_replies(self.pg2, p_adv_vrf0,
"DHCP not a relay message")
# 3 - no circuit ID
p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_RelayReply() / DHCP6OptRelayMsg(optlen=0) /
DHCP6_Advertise())
self.send_and_assert_no_replies(self.pg2, p_adv_vrf0,
"DHCP6 no circuit ID")
# 4 - wrong circuit ID
p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_RelayReply() /
DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x05') /
DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise())
self.send_and_assert_no_replies(self.pg2, p_adv_vrf0,
"DHCP6 wrong circuit ID")
#
# Send the relay response (the advertisement)
# - no peer address
p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_RelayReply() /
DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x03') /
DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) /
DHCP6OptStatusCode(statuscode=0))
pkts_adv_vrf0 = [p_adv_vrf0]
self.pg0.add_stream(pkts_adv_vrf0)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg2.get_capture(1)
self.verify_dhcp6_advert(rx[0], self.pg2, "::")
#
# Send the relay response (the advertisement)
# - with peer address
p_adv_vrf0 = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IPv6(dst=self.pg0.local_ip6, src=self.pg0.remote_ip6) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf0) /
DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x03') /
DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) /
DHCP6OptStatusCode(statuscode=0))
pkts_adv_vrf0 = [p_adv_vrf0]
self.pg0.add_stream(pkts_adv_vrf0)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg2.get_capture(1)
self.verify_dhcp6_advert(rx[0], self.pg2, dhcp_solicit_src_vrf0)
#
# Add all the config for VRF 1
#
self.vapi.dhcp_proxy_config(server_addr_vrf1,
src_addr_vrf1,
rx_table_id=1,
server_table_id=1,
is_ipv6=1)
self.pg3.config_ip6()
#
# VRF 1 solicit
#
self.pg3.add_stream(p_solicit_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
self.verify_dhcp6_solicit(rx[0], self.pg1, dhcp_solicit_src_vrf1,
self.pg3.remote_mac)
#
# VRF 1 Advert
#
p_adv_vrf1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IPv6(dst=self.pg1.local_ip6, src=self.pg1.remote_ip6) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') /
DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) /
DHCP6OptStatusCode(statuscode=0))
pkts_adv_vrf1 = [p_adv_vrf1]
self.pg1.add_stream(pkts_adv_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg3.get_capture(1)
self.verify_dhcp6_advert(rx[0], self.pg3, dhcp_solicit_src_vrf1)
#
# Add VSS config
# table=1, fib=id=1, oui=4
self.vapi.dhcp_proxy_set_vss(1, 1, 4, is_ip6=1)
self.pg3.add_stream(p_solicit_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
self.verify_dhcp6_solicit(rx[0],
self.pg1,
dhcp_solicit_src_vrf1,
self.pg3.remote_mac,
fib_id=1,
oui=4)
#
# Remove the VSS config
# relayed DHCP has default vlaues in the option.
#
self.vapi.dhcp_proxy_set_vss(1, 1, 4, is_ip6=1, is_add=0)
self.pg3.add_stream(p_solicit_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
self.verify_dhcp6_solicit(rx[0], self.pg1, dhcp_solicit_src_vrf1,
self.pg3.remote_mac)
#
# Add a second DHCP server in VRF 1
# expect clients messages to be relay to both configured servers
#
self.pg1.generate_remote_hosts(2)
server_addr2 = socket.inet_pton(AF_INET6, self.pg1.remote_hosts[1].ip6)
self.vapi.dhcp_proxy_config(server_addr2,
src_addr_vrf1,
rx_table_id=1,
server_table_id=1,
is_ipv6=1)
#
# We'll need an ND entry for the server to send it packets
#
nd_entry = VppNeighbor(self,
self.pg1.sw_if_index,
self.pg1.remote_hosts[1].mac,
self.pg1.remote_hosts[1].ip6,
af=AF_INET6)
nd_entry.add_vpp_config()
#
# Send a discover from the client. expect two relayed messages
# The frist packet is sent to the second server
# We're not enforcing that here, it's just the way it is.
#
self.pg3.add_stream(p_solicit_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(2)
self.verify_dhcp6_solicit(rx[0], self.pg1, dhcp_solicit_src_vrf1,
self.pg3.remote_mac)
self.verify_dhcp6_solicit(rx[1],
self.pg1,
dhcp_solicit_src_vrf1,
self.pg3.remote_mac,
dst_mac=self.pg1.remote_hosts[1].mac,
dst_ip=self.pg1.remote_hosts[1].ip6)
#
# Send both packets back. Client gets both.
#
p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IPv6(dst=self.pg1.local_ip6, src=self.pg1.remote_ip6) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') /
DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) /
DHCP6OptStatusCode(statuscode=0))
p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) /
IPv6(dst=self.pg1.local_ip6, src=self.pg1._remote_hosts[1].ip6) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') /
DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) /
DHCP6OptStatusCode(statuscode=0))
pkts = [p1, p2]
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg3.get_capture(2)
self.verify_dhcp6_advert(rx[0], self.pg3, dhcp_solicit_src_vrf1)
self.verify_dhcp6_advert(rx[1], self.pg3, dhcp_solicit_src_vrf1)
#
# Ensure only solicit messages are duplicated
#
p_request_vrf1 = (
Ether(dst=dmac, src=self.pg3.remote_mac) /
IPv6(src=dhcp_solicit_src_vrf1, dst=dhcp_solicit_dst) /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_CLIENT_PORT) /
DHCP6_Request())
self.pg3.add_stream(p_request_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
#
# Test we drop DHCP packets from addresses that are not configured as
# DHCP servers
#
p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_hosts[1].mac) /
IPv6(dst=self.pg1.local_ip6, src="3001::1") /
UDP(sport=DHCP6_SERVER_PORT, dport=DHCP6_SERVER_PORT) /
DHCP6_RelayReply(peeraddr=dhcp_solicit_src_vrf1) /
DHCP6OptIfaceId(optlen=4, ifaceid='\x00\x00\x00\x04') /
DHCP6OptRelayMsg(optlen=0) / DHCP6_Advertise(trid=1) /
DHCP6OptStatusCode(statuscode=0))
self.send_and_assert_no_replies(self.pg1, p2, "DHCP6 not from server")
#
# Remove the second DHCP server
#
self.vapi.dhcp_proxy_config(server_addr2,
src_addr_vrf1,
rx_table_id=1,
server_table_id=1,
is_ipv6=1,
is_add=0)
#
# Test we can still relay with the first
#
self.pg3.add_stream(p_solicit_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
self.verify_dhcp6_solicit(rx[0], self.pg1, dhcp_solicit_src_vrf1,
self.pg3.remote_mac)
#
# Cleanup
#
self.vapi.dhcp_proxy_config(server_addr_vrf1,
src_addr_vrf1,
rx_table_id=1,
server_table_id=1,
is_ipv6=1,
is_add=0)
self.vapi.dhcp_proxy_config(server_addr_vrf0,
src_addr_vrf0,
rx_table_id=0,
server_table_id=0,
is_ipv6=1,
is_add=0)
# duplicate delete
self.vapi.dhcp_proxy_config(server_addr_vrf0,
src_addr_vrf0,
rx_table_id=0,
server_table_id=0,
is_ipv6=1,
is_add=0)
self.pg2.unconfig_ip6()
self.pg3.unconfig_ip6()
def test_dhcp_proxy(self):
""" DHCPv4 Proxy """
#
# Verify no response to DHCP request without DHCP config
#
p_disc_vrf0 = (
Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg2.remote_mac) /
IP(src="0.0.0.0", dst="255.255.255.255") /
UDP(sport=DHCP4_CLIENT_PORT, dport=DHCP4_SERVER_PORT) /
BOOTP(op=1) /
DHCP(options=[('message-type', 'discover'), ('end')]))
pkts_disc_vrf0 = [p_disc_vrf0]
p_disc_vrf1 = (
Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg3.remote_mac) /
IP(src="0.0.0.0", dst="255.255.255.255") /
UDP(sport=DHCP4_CLIENT_PORT, dport=DHCP4_SERVER_PORT) /
BOOTP(op=1) /
DHCP(options=[('message-type', 'discover'), ('end')]))
pkts_disc_vrf1 = [p_disc_vrf0]
self.send_and_assert_no_replies(self.pg2, pkts_disc_vrf0,
"DHCP with no configuration")
self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf1,
"DHCP with no configuration")
#
# Enable DHCP proxy in VRF 0
#
server_addr = self.pg0.remote_ip4n
src_addr = self.pg0.local_ip4n
self.vapi.dhcp_proxy_config(server_addr, src_addr, rx_table_id=0)
#
# Discover packets from the client are dropped because there is no
# IP address configured on the client facing interface
#
self.send_and_assert_no_replies(self.pg2, pkts_disc_vrf0,
"Discover DHCP no relay address")
#
# Inject a response from the server
# dropped, because there is no IP addrees on the
# client interfce to fill in the option.
#
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
BOOTP(op=1) / DHCP(options=[('message-type', 'offer'), ('end')]))
pkts = [p]
self.send_and_assert_no_replies(self.pg2, pkts,
"Offer DHCP no relay address")
#
# configure an IP address on the client facing interface
#
self.pg2.config_ip4()
#
# Try again with a discover packet
# Rx'd packet should be to the server address and from the configured
# source address
# UDP source ports are unchanged
# we've no option 82 config so that should be absent
#
self.pg2.add_stream(pkts_disc_vrf0)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg0.get_capture(1)
rx = rx[0]
option_82 = self.verify_relayed_dhcp_discover(rx,
self.pg0,
src_intf=self.pg2)
#
# Create an DHCP offer reply from the server with a correctly formatted
# option 82. i.e. send back what we just captured
# The offer, sent mcast to the client, still has option 82.
#
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
BOOTP(op=1) /
DHCP(options=[('message-type', 'offer'),
('relay_agent_Information', option_82), ('end')]))
pkts = [p]
self.pg0.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg2.get_capture(1)
rx = rx[0]
self.verify_dhcp_offer(rx, self.pg2)
#
# Bogus Option 82:
#
# 1. not our IP address = not checked by VPP? so offer is replayed
# to client
bad_ip = option_82[0:8] + chr(33) + option_82[9:]
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
BOOTP(op=1) /
DHCP(options=[('message-type', 'offer'),
('relay_agent_Information', bad_ip), ('end')]))
pkts = [p]
self.send_and_assert_no_replies(self.pg0, pkts,
"DHCP offer option 82 bad address")
# 2. Not a sw_if_index VPP knows
bad_if_index = option_82[0:2] + chr(33) + option_82[3:]
p = (Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
BOOTP(op=1) /
DHCP(options=[('message-type',
'offer'), ('relay_agent_Information',
bad_if_index), ('end')]))
pkts = [p]
self.send_and_assert_no_replies(self.pg0, pkts,
"DHCP offer option 82 bad if index")
#
# Send a DHCP request in VRF 1. should be dropped.
#
self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf1,
"DHCP with no configuration VRF 1")
#
# Delete the DHCP config in VRF 0
# Should now drop requests.
#
self.vapi.dhcp_proxy_config(server_addr,
src_addr,
rx_table_id=0,
is_add=0)
self.send_and_assert_no_replies(self.pg2, pkts_disc_vrf0,
"DHCP config removed VRF 0")
self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf1,
"DHCP config removed VRF 1")
#
# Add DHCP config for VRF 1
#
server_addr = self.pg1.remote_ip4n
src_addr = self.pg1.local_ip4n
self.vapi.dhcp_proxy_config(server_addr,
src_addr,
rx_table_id=1,
server_table_id=1)
#
# Confim DHCP requests ok in VRF 1.
# - dropped on IP config on client interface
#
self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf1,
"DHCP config removed VRF 1")
#
# configure an IP address on the client facing interface
#
self.pg3.config_ip4()
self.pg3.add_stream(pkts_disc_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
rx = rx[0]
self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg3)
#
# Add VSS config
# table=1, fib=id=1, oui=4
self.vapi.dhcp_proxy_set_vss(1, 1, 4)
self.pg3.add_stream(pkts_disc_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
rx = rx[0]
self.verify_relayed_dhcp_discover(rx,
self.pg1,
src_intf=self.pg3,
fib_id=1,
oui=4)
#
# Add a second DHCP server in VRF 1
# expect clients messages to be relay to both configured servers
#
self.pg1.generate_remote_hosts(2)
server_addr2 = socket.inet_pton(AF_INET, self.pg1.remote_hosts[1].ip4)
self.vapi.dhcp_proxy_config(server_addr2,
src_addr,
rx_table_id=1,
server_table_id=1,
is_add=1)
#
# We'll need an ARP entry for the server to send it packets
#
arp_entry = VppNeighbor(self, self.pg1.sw_if_index,
self.pg1.remote_hosts[1].mac,
self.pg1.remote_hosts[1].ip4)
arp_entry.add_vpp_config()
#
# Send a discover from the client. expect two relayed messages
# The frist packet is sent to the second server
# We're not enforcing that here, it's just the way it is.
#
self.pg3.add_stream(pkts_disc_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(2)
option_82 = self.verify_relayed_dhcp_discover(
rx[0],
self.pg1,
src_intf=self.pg3,
dst_mac=self.pg1.remote_hosts[1].mac,
dst_ip=self.pg1.remote_hosts[1].ip4,
fib_id=1,
oui=4)
self.verify_relayed_dhcp_discover(rx[1],
self.pg1,
src_intf=self.pg3,
fib_id=1,
oui=4)
#
# Send both packets back. Client gets both.
#
p1 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IP(src=self.pg1.remote_ip4, dst=self.pg1.local_ip4) /
UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
BOOTP(op=1) /
DHCP(options=[('message-type', 'offer'),
('relay_agent_Information', option_82), ('end')]))
p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IP(src=self.pg1.remote_hosts[1].ip4, dst=self.pg1.local_ip4) /
UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
BOOTP(op=1) /
DHCP(options=[('message-type', 'offer'),
('relay_agent_Information', option_82), ('end')]))
pkts = [p1, p2]
self.pg1.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg3.get_capture(2)
self.verify_dhcp_offer(rx[0], self.pg3, fib_id=1, oui=4)
self.verify_dhcp_offer(rx[1], self.pg3, fib_id=1, oui=4)
#
# Ensure offers from non-servers are dropeed
#
p2 = (Ether(dst=self.pg1.local_mac, src=self.pg1.remote_mac) /
IP(src="8.8.8.8", dst=self.pg1.local_ip4) /
UDP(sport=DHCP4_SERVER_PORT, dport=DHCP4_SERVER_PORT) /
BOOTP(op=1) /
DHCP(options=[('message-type', 'offer'),
('relay_agent_Information', option_82), ('end')]))
self.send_and_assert_no_replies(self.pg1, p2,
"DHCP offer from non-server")
#
# Ensure only the discover is sent to multiple servers
#
p_req_vrf1 = (Ether(dst="ff:ff:ff:ff:ff:ff", src=self.pg3.remote_mac) /
IP(src="0.0.0.0", dst="255.255.255.255") /
UDP(sport=DHCP4_CLIENT_PORT, dport=DHCP4_SERVER_PORT) /
BOOTP(op=1) /
DHCP(options=[('message-type', 'request'), ('end')]))
self.pg3.add_stream(p_req_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
#
# Remove the second DHCP server
#
self.vapi.dhcp_proxy_config(server_addr2,
src_addr,
rx_table_id=1,
server_table_id=1,
is_add=0)
#
# Test we can still relay with the first
#
self.pg3.add_stream(pkts_disc_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
rx = rx[0]
self.verify_relayed_dhcp_discover(rx,
self.pg1,
src_intf=self.pg3,
fib_id=1,
oui=4)
#
# Remove the VSS config
# relayed DHCP has default vlaues in the option.
#
self.vapi.dhcp_proxy_set_vss(1, 1, 4, is_add=0)
self.pg3.add_stream(pkts_disc_vrf1)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = self.pg1.get_capture(1)
rx = rx[0]
self.verify_relayed_dhcp_discover(rx, self.pg1, src_intf=self.pg3)
#
# remove DHCP config to cleanup
#
self.vapi.dhcp_proxy_config(server_addr,
src_addr,
rx_table_id=1,
server_table_id=1,
is_add=0)
self.send_and_assert_no_replies(self.pg2, pkts_disc_vrf0,
"DHCP cleanup VRF 0")
self.send_and_assert_no_replies(self.pg3, pkts_disc_vrf1,
"DHCP cleanup VRF 1")
self.pg2.unconfig_ip4()
self.pg3.unconfig_ip4()
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 (requets 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):
""" 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)
def test_udp_decap(self):
""" UDP Decap test
"""
#
# construct a UDP decap object for each type of protocol
#
# IPv4
udp_api_proto = VppEnum.vl_api_udp_decap_next_proto_t
next_proto = udp_api_proto.UDP_API_DECAP_PROTO_IP4
udp_decap_0 = VppUdpDecap(self, 1, 220, next_proto)
# IPv6
next_proto = udp_api_proto.UDP_API_DECAP_PROTO_IP6
udp_decap_1 = VppUdpDecap(self, 0, 221, next_proto)
# MPLS
next_proto = udp_api_proto.UDP_API_DECAP_PROTO_MPLS
udp_decap_2 = VppUdpDecap(self, 1, 222, next_proto)
udp_decap_0.add_vpp_config()
udp_decap_1.add_vpp_config()
udp_decap_2.add_vpp_config()
#
# Routes via the corresponding pg after the UDP decap
#
route_4 = VppIpRoute(self,
"1.1.1.1",
32,
[VppRoutePath("0.0.0.0", self.pg0.sw_if_index)],
table_id=0)
route_6 = VppIpRoute(self,
"2001::1",
128, [VppRoutePath("::", self.pg1.sw_if_index)],
table_id=1)
route_mo4 = VppIpRoute(self,
"3.3.3.3",
32,
[VppRoutePath("0.0.0.0", self.pg2.sw_if_index)],
table_id=2)
route_4.add_vpp_config()
route_6.add_vpp_config()
route_mo4.add_vpp_config()
#
# Adding neighbors to route the packets
#
n_4 = VppNeighbor(self, self.pg0.sw_if_index, "00:11:22:33:44:55",
"1.1.1.1")
n_6 = VppNeighbor(self, self.pg1.sw_if_index, "11:22:33:44:55:66",
"2001::1")
n_mo4 = VppNeighbor(self, self.pg2.sw_if_index, "22:33:44:55:66:77",
"3.3.3.3")
n_4.add_vpp_config()
n_6.add_vpp_config()
n_mo4.add_vpp_config()
#
# MPLS decapsulation config
#
mpls_table = VppMplsTable(self, 0)
mpls_table.add_vpp_config()
mpls_route = VppMplsRoute(self, 77, 1, [
VppRoutePath("0.0.0.0",
0xFFFFFFFF,
nh_table_id=2,
proto=FibPathProto.FIB_PATH_NH_PROTO_IP4)
])
mpls_route.add_vpp_config()
#
# UDP over ipv4 decap
#
p_4 = (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
UDP(sport=1111, dport=220) / IP(src="2.2.2.2", dst="1.1.1.1") /
UDP(sport=1234, dport=4321) / Raw(b'\xa5' * 100))
rx = self.send_and_expect(self.pg0, p_4 * NUM_PKTS, self.pg0)
p_4 = IP(p_4["UDP"].payload)
for p in rx:
p = IP(p["Ether"].payload)
self.validate_inner4(p, p_4, ttl=63)
#
# UDP over ipv6 decap
#
p_6 = (Ether(src=self.pg1.remote_mac, dst=self.pg1.local_mac) /
IPv6(src=self.pg1.remote_ip6, dst=self.pg1.local_ip6) /
UDP(sport=2222, dport=221) /
IPv6(src="2001::100", dst="2001::1") /
UDP(sport=1234, dport=4321) / Raw(b'\xa5' * 100))
rx = self.send_and_expect(self.pg1, p_6 * NUM_PKTS, self.pg1)
p_6 = IPv6(p_6["UDP"].payload)
p = IPv6(rx[0]["Ether"].payload)
for p in rx:
p = IPv6(p["Ether"].payload)
self.validate_inner6(p, p_6, hlim=63)
#
# UDP over mpls decap
#
p_mo4 = (Ether(src=self.pg2.remote_mac, dst=self.pg2.local_mac) /
IP(src=self.pg2.remote_ip4, dst=self.pg2.local_ip4) /
UDP(sport=3333, dport=222) / MPLS(label=77, ttl=1) /
IP(src="4.4.4.4", dst="3.3.3.3") /
UDP(sport=1234, dport=4321) / Raw(b'\xa5' * 100))
self.pg2.enable_mpls()
rx = self.send_and_expect(self.pg2, p_mo4 * NUM_PKTS, self.pg2)
self.pg2.disable_mpls()
p_mo4 = IP(MPLS(p_mo4["UDP"].payload).payload)
for p in rx:
p = IP(p["Ether"].payload)
self.validate_inner4(p, p_mo4, ttl=63)
def test_ns(self):
""" IPv6 Neighbour Solicitation Exceptions
Test scenario:
- Send an NS Sourced from an address not covered by the link sub-net
- Send an NS to an mcast address the router has not joined
- Send NS for a target address the router does not onn.
"""
#
# An NS from a non link source address
#
nsma = in6_getnsma(inet_pton(AF_INET6, self.pg0.local_ip6))
d = inet_ntop(AF_INET6, nsma)
p = (Ether(dst=in6_getnsmac(nsma)) / IPv6(dst=d, src="2002::2") /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac))
pkts = [p]
self.send_and_assert_no_replies(
self.pg0, pkts,
"No response to NS source by address not on sub-net")
#
# An NS for sent to a solicited mcast group the router is
# not a member of FAILS
#
if 0:
nsma = in6_getnsma(inet_pton(AF_INET6, "fd::ffff"))
d = inet_ntop(AF_INET6, nsma)
p = (Ether(dst=in6_getnsmac(nsma)) /
IPv6(dst=d, src=self.pg0.remote_ip6) /
ICMPv6ND_NS(tgt=self.pg0.local_ip6) /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac))
pkts = [p]
self.send_and_assert_no_replies(
self.pg0, pkts,
"No response to NS sent to unjoined mcast address")
#
# An NS whose target address is one the router does not own
#
nsma = in6_getnsma(inet_pton(AF_INET6, self.pg0.local_ip6))
d = inet_ntop(AF_INET6, nsma)
p = (Ether(dst=in6_getnsmac(nsma)) /
IPv6(dst=d, src=self.pg0.remote_ip6) /
ICMPv6ND_NS(tgt="fd::ffff") /
ICMPv6NDOptSrcLLAddr(lladdr=self.pg0.remote_mac))
pkts = [p]
self.send_and_assert_no_replies(
self.pg0, pkts, "No response to NS for unknown target")
#
# A neighbor entry that has no associated FIB-entry
#
self.pg0.generate_remote_hosts(4)
nd_entry = VppNeighbor(self,
self.pg0.sw_if_index,
self.pg0.remote_hosts[2].mac,
self.pg0.remote_hosts[2].ip6,
af=AF_INET6,
is_no_fib_entry=1)
nd_entry.add_vpp_config()
#
# check we have the neighbor, but no route
#
self.assertTrue(
find_nbr(self,
self.pg0.sw_if_index,
self.pg0._remote_hosts[2].ip6,
inet=AF_INET6))
self.assertFalse(
find_route(self, self.pg0._remote_hosts[2].ip6, 128,
inet=AF_INET6))