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#!/usr/bin/env python
""" L2BD ARP term Test """
import unittest
import random
import copy
from socket import AF_INET, AF_INET6
from scapy.packet import Raw
from scapy.layers.l2 import Ether, ARP
from scapy.layers.inet import IP
from scapy.utils import inet_pton, inet_ntop
from scapy.utils6 import in6_getnsma, in6_getnsmac, in6_ptop, in6_islladdr, \
in6_mactoifaceid, in6_ismaddr
from scapy.layers.inet6 import IPv6, UDP, ICMPv6ND_NS, ICMPv6ND_RS, \
ICMPv6ND_RA, ICMPv6NDOptSrcLLAddr, getmacbyip6, ICMPv6MRD_Solicitation, \
ICMPv6NDOptMTU, ICMPv6NDOptSrcLLAddr, ICMPv6NDOptPrefixInfo, \
ICMPv6ND_NA, ICMPv6NDOptDstLLAddr, ICMPv6DestUnreach, icmp6types
from framework import VppTestCase, VppTestRunner
from util import Host, ppp
class TestL2bdArpTerm(VppTestCase):
""" L2BD arp termination Test Case """
@classmethod
def setUpClass(cls):
"""
Perform standard class setup (defined by class method setUpClass in
class VppTestCase) before running the test case, set test case related
variables and configure VPP.
"""
super(TestL2bdArpTerm, cls).setUpClass()
try:
# Create pg interfaces
n_bd = 1
cls.ifs_per_bd = ifs_per_bd = 3
n_ifs = n_bd * ifs_per_bd
cls.create_pg_interfaces(range(n_ifs))
# Set up all interfaces
for i in cls.pg_interfaces:
i.admin_up()
cls.hosts = set()
except Exception:
super(TestL2bdArpTerm, cls).tearDownClass()
raise
def setUp(self):
"""
Clear trace and packet infos before running each test.
"""
self.reset_packet_infos()
super(TestL2bdArpTerm, self).setUp()
def tearDown(self):
"""
Show various debug prints after each test.
"""
super(TestL2bdArpTerm, self).tearDown()
if not self.vpp_dead:
self.logger.info(self.vapi.ppcli("show l2fib verbose"))
self.logger.info(self.vapi.ppcli("show bridge-domain 1 detail"))
def add_del_arp_term_hosts(self, entries, bd_id=1, is_add=1, is_ipv6=0):
for e in entries:
ip = e.ip4 if is_ipv6 == 0 else e.ip6
self.vapi.bd_ip_mac_add_del(bd_id=bd_id,
mac=e.mac,
ip=ip,
is_ipv6=is_ipv6,
is_add=is_add)
@classmethod
def mac_list(cls, b6_range):
return ["00:00:ca:fe:00:%02x" % b6 for b6 in b6_range]
@classmethod
def ip4_host(cls, subnet, host, mac):
return Host(mac=mac,
ip4="172.17.1%02u.%u" % (subnet, host))
@classmethod
def ip4_hosts(cls, subnet, start, mac_list):
return {cls.ip4_host(subnet, start + j, mac_list[j])
for j in range(len(mac_list))}
@classmethod
def ip6_host(cls, subnet, host, mac):
return Host(mac=mac,
ip6="fd01:%x::%x" % (subnet, host))
@classmethod
def ip6_hosts(cls, subnet, start, mac_list):
return {cls.ip6_host(subnet, start + j, mac_list[j])
for j in range(len(mac_list))}
@classmethod
def bd_swifs(cls, b):
n = cls.ifs_per_bd
start = (b - 1) * n
return [cls.pg_interfaces[j] for j in range(start, start + n)]
def bd_add_del(self, bd_id=1, is_add=1):
if is_add:
self.vapi.bridge_domain_add_del(bd_id=bd_id, is_add=is_add)
for swif in self.bd_swifs(bd_id):
swif_idx = swif.sw_if_index
self.vapi.sw_interface_set_l2_bridge(
swif_idx, bd_id=bd_id, enable=is_add)
if not is_add:
self.vapi.bridge_domain_add_del(bd_id=bd_id, is_add=is_add)
@classmethod
def arp_req(cls, src_host, host):
return (Ether(dst="ff:ff:ff:ff:ff:ff", src=src_host.mac) /
ARP(op="who-has",
hwsrc=src_host.bin_mac,
pdst=host.ip4,
psrc=src_host.ip4))
@classmethod
def arp_reqs(cls, src_host, entries):
return [cls.arp_req(src_host, e) for e in entries]
@classmethod
def garp_req(cls, host):
return cls.arp_req(host, host)
@classmethod
def garp_reqs(cls, entries):
return [cls.garp_req(e) for e in entries]
def arp_resp_host(self, src_host, arp_resp):
ether = arp_resp[Ether]
self.assertEqual(ether.dst, src_host.mac)
arp = arp_resp[ARP]
self.assertEqual(arp.hwtype, 1)
self.assertEqual(arp.ptype, 0x800)
self.assertEqual(arp.hwlen, 6)
self.assertEqual(arp.plen, 4)
arp_opts = {"who-has": 1, "is-at": 2}
self.assertEqual(arp.op, arp_opts["is-at"])
self.assertEqual(arp.hwdst, src_host.mac)
self.assertEqual(arp.pdst, src_host.ip4)
return Host(mac=arp.hwsrc, ip4=arp.psrc)
def arp_resp_hosts(self, src_host, pkts):
return {self.arp_resp_host(src_host, p) for p in pkts}
@staticmethod
def inttoip4(ip):
o1 = int(ip / 16777216) % 256
o2 = int(ip / 65536) % 256
o3 = int(ip / 256) % 256
o4 = int(ip) % 256
return '%s.%s.%s.%s' % (o1, o2, o3, o4)
def arp_event_host(self, e):
return Host(mac=':'.join(['%02x' % ord(char) for char in e.new_mac]),
ip4=self.inttoip4(e.address))
def arp_event_hosts(self, evs):
return {self.arp_event_host(e) for e in evs}
def nd_event_host(self, e):
return Host(mac=':'.join(['%02x' % ord(char) for char in e.new_mac]),
ip6=inet_ntop(AF_INET6, e.address))
def nd_event_hosts(self, evs):
return {self.nd_event_host(e) for e in evs}
@classmethod
def ns_req(cls, src_host, host):
nsma = in6_getnsma(inet_pton(AF_INET6, "fd10::ffff"))
d = inet_ntop(AF_INET6, nsma)
return (Ether(dst="ff:ff:ff:ff:ff:ff", src=src_host.mac) /
IPv6(dst=d, src=src_host.ip6) /
ICMPv6ND_NS(tgt=host.ip6) /
ICMPv6NDOptSrcLLAddr(lladdr=src_host.mac))
@classmethod
def ns_reqs_dst(cls, entries, dst_host):
return [cls.ns_req(e, dst_host) for e in entries]
@classmethod
def ns_reqs_src(cls, src_host, entries):
return [cls.ns_req(src_host, e) for e in entries]
def na_resp_host(self, src_host, rx):
self.assertEqual(rx[Ether].dst, src_host.mac)
self.assertEqual(in6_ptop(rx[IPv6].dst),
in6_ptop(src_host.ip6))
self.assertTrue(rx.haslayer(ICMPv6ND_NA))
self.assertTrue(rx.haslayer(ICMPv6NDOptDstLLAddr))
na = rx[ICMPv6ND_NA]
return Host(mac=na.lladdr, ip6=na.tgt)
def na_resp_hosts(self, src_host, pkts):
return {self.na_resp_host(src_host, p) for p in pkts}
def set_bd_flags(self, bd_id, **args):
"""
Enable/disable defined feature(s) of the bridge domain.
:param int bd_id: Bridge domain ID.
:param list args: List of feature/status pairs. Allowed features: \
learn, forward, flood, uu_flood and arp_term. Status False means \
disable, status True means enable the feature.
:raise: ValueError in case of unknown feature in the input.
"""
for flag in args:
if flag == "learn":
feature_bitmap = 1 << 0
elif flag == "forward":
feature_bitmap = 1 << 1
elif flag == "flood":
feature_bitmap = 1 << 2
elif flag == "uu_flood":
feature_bitmap = 1 << 3
elif flag == "arp_term":
feature_bitmap = 1 << 4
else:
raise ValueError("Unknown feature used: %s" % flag)
is_set = 1 if args[flag] else 0
self.vapi.bridge_flags(bd_id, is_set, feature_bitmap)
self.logger.info("Bridge domain ID %d updated" % bd_id)
def verify_arp(self, src_host, req_hosts, resp_hosts, bd_id=1):
reqs = self.arp_reqs(src_host, req_hosts)
for swif in self.bd_swifs(bd_id):
swif.add_stream(reqs)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for swif in self.bd_swifs(bd_id):
resp_pkts = swif.get_capture(len(resp_hosts))
resps = self.arp_resp_hosts(src_host, resp_pkts)
self.assertEqual(len(resps ^ resp_hosts), 0)
def verify_nd(self, src_host, req_hosts, resp_hosts, bd_id=1):
reqs = self.ns_reqs_src(src_host, req_hosts)
for swif in self.bd_swifs(bd_id):
swif.add_stream(reqs)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
for swif in self.bd_swifs(bd_id):
resp_pkts = swif.get_capture(len(resp_hosts))
resps = self.na_resp_hosts(src_host, resp_pkts)
self.assertEqual(len(resps ^ resp_hosts), 0)
def test_l2bd_arp_term_01(self):
""" L2BD arp term - add 5 hosts, verify arp responses
"""
src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
self.bd_add_del(1, is_add=1)
self.set_bd_flags(1, arp_term=True, flood=False,
uu_flood=False, learn=False)
macs = self.mac_list(range(1, 5))
hosts = self.ip4_hosts(4, 1, macs)
self.add_del_arp_term_hosts(hosts, is_add=1)
self.verify_arp(src_host, hosts, hosts)
type(self).hosts = hosts
def test_l2bd_arp_term_02(self):
""" L2BD arp term - delete 3 hosts, verify arp responses
"""
src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
macs = self.mac_list(range(1, 3))
deleted = self.ip4_hosts(4, 1, macs)
self.add_del_arp_term_hosts(deleted, is_add=0)
remaining = self.hosts - deleted
self.verify_arp(src_host, self.hosts, remaining)
type(self).hosts = remaining
self.bd_add_del(1, is_add=0)
def test_l2bd_arp_term_03(self):
""" L2BD arp term - recreate BD1, readd 3 hosts, verify arp responses
"""
src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
self.bd_add_del(1, is_add=1)
self.set_bd_flags(1, arp_term=True, flood=False,
uu_flood=False, learn=False)
macs = self.mac_list(range(1, 3))
readded = self.ip4_hosts(4, 1, macs)
self.add_del_arp_term_hosts(readded, is_add=1)
self.verify_arp(src_host, self.hosts | readded, readded)
type(self).hosts = readded
def test_l2bd_arp_term_04(self):
""" L2BD arp term - 2 IP4 addrs per host
"""
src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
macs = self.mac_list(range(1, 3))
sub5_hosts = self.ip4_hosts(5, 1, macs)
self.add_del_arp_term_hosts(sub5_hosts, is_add=1)
hosts = self.hosts | sub5_hosts
self.verify_arp(src_host, hosts, hosts)
type(self).hosts = hosts
self.bd_add_del(1, is_add=0)
def test_l2bd_arp_term_05(self):
""" L2BD arp term - create and update 10 IP4-mac pairs
"""
src_host = self.ip4_host(50, 50, "00:00:11:22:33:44")
self.bd_add_del(1, is_add=1)
self.set_bd_flags(1, arp_term=True, flood=False,
uu_flood=False, learn=False)
macs1 = self.mac_list(range(10, 20))
hosts1 = self.ip4_hosts(5, 1, macs1)
self.add_del_arp_term_hosts(hosts1, is_add=1)
self.verify_arp(src_host, hosts1, hosts1)
macs2 = self.mac_list(range(20, 30))
hosts2 = self.ip4_hosts(5, 1, macs2)
self.add_del_arp_term_hosts(hosts2, is_add=1)
self.verify_arp(src_host, hosts1, hosts2)
self.bd_add_del(1, is_add=0)
def test_l2bd_arp_term_06(self):
""" L2BD arp/ND term - hosts with both ip4/ip6
"""
src_host4 = self.ip4_host(50, 50, "00:00:11:22:33:44")
src_host6 = self.ip6_host(50, 50, "00:00:11:22:33:44")
self.bd_add_del(1, is_add=1)
# enable flood to make sure requests are not flooded
self.set_bd_flags(1, arp_term=True, flood=True,
uu_flood=False, learn=False)
macs = self.mac_list(range(10, 20))
hosts6 = self.ip6_hosts(5, 1, macs)
hosts4 = self.ip4_hosts(5, 1, macs)
self.add_del_arp_term_hosts(hosts4, is_add=1)
self.add_del_arp_term_hosts(hosts6, is_add=1, is_ipv6=1)
self.verify_arp(src_host4, hosts4, hosts4)
self.verify_nd(src_host6, hosts6, hosts6)
self.bd_add_del(1, is_add=0)
def test_l2bd_arp_term_07(self):
""" L2BD ND term - Add and Del hosts, verify ND replies
"""
src_host6 = self.ip6_host(50, 50, "00:00:11:22:33:44")
self.bd_add_del(1, is_add=1)
self.set_bd_flags(1, arp_term=True, flood=False,
uu_flood=False, learn=False)
macs = self.mac_list(range(10, 20))
hosts6 = self.ip6_hosts(5, 1, macs)
self.add_del_arp_term_hosts(hosts6, is_add=1, is_ipv6=1)
self.verify_nd(src_host6, hosts6, hosts6)
del_macs = self.mac_list(range(10, 15))
deleted = self.ip6_hosts(5, 1, del_macs)
self.add_del_arp_term_hosts(deleted, is_add=0, is_ipv6=1)
self.verify_nd(src_host6, hosts6, hosts6 - deleted)
self.bd_add_del(1, is_add=0)
def test_l2bd_arp_term_08(self):
""" L2BD ND term - Add and update IP+mac, verify ND replies
"""
src_host = self.ip6_host(50, 50, "00:00:11:22:33:44")
self.bd_add_del(1, is_add=1)
self.set_bd_flags(1, arp_term=True, flood=False,
uu_flood=False, learn=False)
macs1 = self.mac_list(range(10, 20))
hosts = self.ip6_hosts(5, 1, macs1)
self.add_del_arp_term_hosts(hosts, is_add=1, is_ipv6=1)
self.verify_nd(src_host, hosts, hosts)
macs2 = self.mac_list(range(20, 30))
updated = self.ip6_hosts(5, 1, macs2)
self.add_del_arp_term_hosts(updated, is_add=1, is_ipv6=1)
self.verify_nd(src_host, hosts, updated)
self.bd_add_del(1, is_add=0)
def test_l2bd_arp_term_09(self):
""" L2BD arp term - send garps, verify arp event reports
"""
self.vapi.want_ip4_arp_events()
self.bd_add_del(1, is_add=1)
self.set_bd_flags(1, arp_term=True, flood=False,
uu_flood=False, learn=False)
macs = self.mac_list(range(90, 95))
hosts = self.ip4_hosts(5, 1, macs)
garps = self.garp_reqs(hosts)
self.bd_swifs(1)[0].add_stream(garps)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
evs = [self.vapi.wait_for_event(1, "ip4_arp_event")
for i in range(len(hosts))]
ev_hosts = self.arp_event_hosts(evs)
self.assertEqual(len(ev_hosts ^ hosts), 0)
def test_l2bd_arp_term_10(self):
""" L2BD arp term - send duplicate garps, verify suppression
"""
macs = self.mac_list(range(70, 71))
hosts = self.ip4_hosts(6, 1, macs)
""" send the packet 5 times expect one event
"""
garps = self.garp_reqs(hosts) * 5
self.bd_swifs(1)[0].add_stream(garps)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
evs = [self.vapi.wait_for_event(1, "ip4_arp_event")
for i in range(len(hosts))]
ev_hosts = self.arp_event_hosts(evs)
self.assertEqual(len(ev_hosts ^ hosts), 0)
def test_l2bd_arp_term_11(self):
""" L2BD arp term - disable ip4 arp events,send garps, verify no events
"""
self.vapi.want_ip4_arp_events(enable_disable=0)
macs = self.mac_list(range(90, 95))
hosts = self.ip4_hosts(5, 1, macs)
garps = self.garp_reqs(hosts)
self.bd_swifs(1)[0].add_stream(garps)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.sleep(1)
self.assertEqual(len(self.vapi.collect_events()), 0)
self.bd_add_del(1, is_add=0)
def test_l2bd_arp_term_12(self):
""" L2BD ND term - send NS packets verify reports
"""
self.vapi.want_ip6_nd_events(address=inet_pton(AF_INET6, "::0"))
dst_host = self.ip6_host(50, 50, "00:00:11:22:33:44")
self.bd_add_del(1, is_add=1)
self.set_bd_flags(1, arp_term=True, flood=False,
uu_flood=False, learn=False)
macs = self.mac_list(range(10, 15))
hosts = self.ip6_hosts(5, 1, macs)
reqs = self.ns_reqs_dst(hosts, dst_host)
self.bd_swifs(1)[0].add_stream(reqs)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
evs = [self.vapi.wait_for_event(2, "ip6_nd_event")
for i in range(len(hosts))]
ev_hosts = self.nd_event_hosts(evs)
self.assertEqual(len(ev_hosts ^ hosts), 0)
def test_l2bd_arp_term_13(self):
""" L2BD ND term - send duplicate ns, verify suppression
"""
dst_host = self.ip6_host(50, 50, "00:00:11:22:33:44")
macs = self.mac_list(range(10, 11))
hosts = self.ip6_hosts(5, 1, macs)
reqs = self.ns_reqs_dst(hosts, dst_host) * 5
self.bd_swifs(1)[0].add_stream(reqs)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
evs = [self.vapi.wait_for_event(2, "ip6_nd_event")
for i in range(len(hosts))]
ev_hosts = self.nd_event_hosts(evs)
self.assertEqual(len(ev_hosts ^ hosts), 0)
def test_l2bd_arp_term_14(self):
""" L2BD ND term - disable ip4 arp events,send ns, verify no events
"""
self.vapi.want_ip6_nd_events(enable_disable=0,
address=inet_pton(AF_INET6, "::0"))
dst_host = self.ip6_host(50, 50, "00:00:11:22:33:44")
macs = self.mac_list(range(10, 15))
hosts = self.ip6_hosts(5, 1, macs)
reqs = self.ns_reqs_dst(hosts, dst_host)
self.bd_swifs(1)[0].add_stream(reqs)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.sleep(1)
self.assertEqual(len(self.vapi.collect_events()), 0)
self.bd_add_del(1, is_add=0)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
|
