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authorNeale Ranns <nranns@cisco.com>2019-06-05 10:28:17 +0000
committerDamjan Marion <dmarion@me.com>2019-06-07 15:21:16 +0000
commit52cd49616deec9fb562032151f0c5123cf3fcde9 (patch)
tree1709f5102d379361edf1b6b56225c4c0ee8af056 /test/test_bfd.py
parent718a055fa9aec5fafced17b7c20b1556c2cc4d07 (diff)
bfd: UT for BFD session over GRE tunnel
Signed-off-by: Neale Ranns <nranns@cisco.com> Adding UT for BFD over GRE tunnel. Ticket: none Type: test Change-Id: I03eca4a0c7114cdc16fde9be4cd6db6216b8c845 Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'test/test_bfd.py')
-rw-r--r--test/test_bfd.py120
1 files changed, 107 insertions, 13 deletions
diff --git a/test/test_bfd.py b/test/test_bfd.py
index 4c3f5354c1a..4dca11247ce 100644
--- a/test/test_bfd.py
+++ b/test/test_bfd.py
@@ -15,7 +15,7 @@ from six import moves
import scapy.compat
from scapy.layers.inet import UDP, IP
from scapy.layers.inet6 import IPv6
-from scapy.layers.l2 import Ether
+from scapy.layers.l2 import Ether, GRE
from scapy.packet import Raw
from bfd import VppBFDAuthKey, BFD, BFDAuthType, VppBFDUDPSession, \
@@ -27,6 +27,7 @@ from vpp_ip_route import VppIpRoute, VppRoutePath
from vpp_lo_interface import VppLoInterface
from vpp_papi_provider import UnexpectedApiReturnValueError
from vpp_pg_interface import CaptureTimeoutError, is_ipv6_misc
+from vpp_gre_interface import VppGreInterface
USEC_IN_SEC = 1000000
@@ -312,12 +313,17 @@ class BFDTestSession(object):
""" BFD session as seen from test framework side """
def __init__(self, test, interface, af, detect_mult=3, sha1_key=None,
- bfd_key_id=None, our_seq_number=None):
+ bfd_key_id=None, our_seq_number=None,
+ tunnel_header=None, phy_interface=None):
self.test = test
self.af = af
self.sha1_key = sha1_key
self.bfd_key_id = bfd_key_id
self.interface = interface
+ if phy_interface:
+ self.phy_interface = phy_interface
+ else:
+ self.phy_interface = self.interface
self.udp_sport = randint(49152, 65535)
if our_seq_number is None:
self.our_seq_number = randint(0, 40000000)
@@ -333,6 +339,7 @@ class BFDTestSession(object):
self.your_discriminator = None
self.state = BFDState.down
self.auth_type = BFDAuthType.no_auth
+ self.tunnel_header = tunnel_header
def inc_seq_num(self):
""" increment sequence number, wrapping if needed """
@@ -418,17 +425,19 @@ class BFDTestSession(object):
bfd.length = BFD.sha1_auth_len + BFD.bfd_pkt_len
else:
bfd = BFD()
+ packet = Ether(src=self.phy_interface.remote_mac,
+ dst=self.phy_interface.local_mac)
+ if self.tunnel_header:
+ packet = packet / self.tunnel_header
if self.af == AF_INET6:
- packet = (Ether(src=self.interface.remote_mac,
- dst=self.interface.local_mac) /
+ packet = (packet /
IPv6(src=self.interface.remote_ip6,
dst=self.interface.local_ip6,
hlim=255) /
UDP(sport=self.udp_sport, dport=BFD.udp_dport) /
bfd)
else:
- packet = (Ether(src=self.interface.remote_mac,
- dst=self.interface.local_mac) /
+ packet = (packet /
IP(src=self.interface.remote_ip4,
dst=self.interface.local_ip4,
ttl=255) /
@@ -450,7 +459,7 @@ class BFDTestSession(object):
if packet is None:
packet = self.create_packet()
if interface is None:
- interface = self.test.pg0
+ interface = self.phy_interface
self.test.logger.debug(ppp("Sending packet:", packet))
interface.add_stream(packet)
self.test.pg_start()
@@ -514,7 +523,7 @@ class BFDTestSession(object):
def bfd_session_up(test):
""" Bring BFD session up """
test.logger.info("BFD: Waiting for slow hello")
- p = wait_for_bfd_packet(test, 2)
+ p = wait_for_bfd_packet(test, 2, is_tunnel=test.vpp_session.is_tunnel)
old_offset = None
if hasattr(test, 'vpp_clock_offset'):
old_offset = test.vpp_clock_offset
@@ -589,13 +598,13 @@ def verify_ip(test, packet):
""" Verify correctness of IP layer. """
if test.vpp_session.af == AF_INET6:
ip = packet[IPv6]
- local_ip = test.pg0.local_ip6
- remote_ip = test.pg0.remote_ip6
+ local_ip = test.vpp_session.interface.local_ip6
+ remote_ip = test.vpp_session.interface.remote_ip6
test.assert_equal(ip.hlim, 255, "IPv6 hop limit")
else:
ip = packet[IP]
- local_ip = test.pg0.local_ip4
- remote_ip = test.pg0.remote_ip4
+ local_ip = test.vpp_session.interface.local_ip4
+ remote_ip = test.vpp_session.interface.remote_ip4
test.assert_equal(ip.ttl, 255, "IPv4 TTL")
test.assert_equal(ip.src, local_ip, "IP source address")
test.assert_equal(ip.dst, remote_ip, "IP destination address")
@@ -633,7 +642,7 @@ def verify_event(test, event, expected_state):
test.assert_equal(e.state, expected_state, BFDState)
-def wait_for_bfd_packet(test, timeout=1, pcap_time_min=None):
+def wait_for_bfd_packet(test, timeout=1, pcap_time_min=None, is_tunnel=False):
""" wait for BFD packet and verify its correctness
:param timeout: how long to wait
@@ -659,6 +668,10 @@ def wait_for_bfd_packet(test, timeout=1, pcap_time_min=None):
(p.time, pcap_time_min), p))
else:
break
+ if is_tunnel:
+ # strip an IP layer and move to the next
+ p = p[IP].payload
+
bfd = p[BFD]
if bfd is None:
raise Exception(ppp("Unexpected or invalid BFD packet:", p))
@@ -1805,6 +1818,87 @@ class BFDFIBTestCase(VppTestCase):
@unittest.skipUnless(running_extended_tests, "part of extended tests")
+class BFDTunTestCase(VppTestCase):
+ """ BFD over GRE tunnel """
+
+ vpp_session = None
+ test_session = None
+
+ @classmethod
+ def setUpClass(cls):
+ super(BFDTunTestCase, cls).setUpClass()
+
+ @classmethod
+ def tearDownClass(cls):
+ super(BFDTunTestCase, cls).tearDownClass()
+
+ def setUp(self):
+ super(BFDTunTestCase, self).setUp()
+ self.create_pg_interfaces(range(1))
+
+ self.vapi.want_bfd_events()
+ self.pg0.enable_capture()
+
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ def tearDown(self):
+ if not self.vpp_dead:
+ self.vapi.want_bfd_events(enable_disable=0)
+
+ super(BFDTunTestCase, self).tearDown()
+
+ @staticmethod
+ def pkt_is_not_data_traffic(p):
+ """ not data traffic implies BFD or the usual IPv6 ND/RA"""
+ if p.haslayer(BFD) or is_ipv6_misc(p):
+ return True
+ return False
+
+ def test_bfd_o_gre(self):
+ """ BFD-o-GRE """
+
+ # A GRE interface over which to run a BFD session
+ gre_if = VppGreInterface(self,
+ self.pg0.local_ip4,
+ self.pg0.remote_ip4)
+ gre_if.add_vpp_config()
+ gre_if.admin_up()
+ gre_if.config_ip4()
+
+ # bring the session up now the routes are present
+ self.vpp_session = VppBFDUDPSession(self,
+ gre_if,
+ gre_if.remote_ip4,
+ is_tunnel=True)
+ self.vpp_session.add_vpp_config()
+ self.vpp_session.admin_up()
+
+ self.test_session = BFDTestSession(
+ self, gre_if, AF_INET,
+ tunnel_header=(IP(src=self.pg0.remote_ip4,
+ dst=self.pg0.local_ip4) /
+ GRE()),
+ phy_interface=self.pg0)
+
+ # packets to match against both of the routes
+ p = [(Ether(dst=self.pg0.local_mac, src=self.pg0.remote_mac) /
+ IP(src=self.pg0.remote_ip4, dst=gre_if.remote_ip4) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100))]
+
+ # session is up - traffic passes
+ bfd_session_up(self)
+
+ self.send_and_expect(self.pg0, p, self.pg0)
+
+ # bring session down
+ bfd_session_down(self)
+
+
+@unittest.skipUnless(running_extended_tests, "part of extended tests")
class BFDSHA1TestCase(VppTestCase):
"""Bidirectional Forwarding Detection (BFD) (SHA1 auth) """