from __future__ import division
import binascii
+from collections import namedtuple
import hashlib
import ipaddress
import reprlib
self.state = BFDState.down
self.auth_type = BFDAuthType.no_auth
self.tunnel_header = tunnel_header
+ self.tx_packets = 0
+ self.rx_packets = 0
+ self.tx_packets_echo = 0
+ self.rx_packets_echo = 0
def inc_seq_num(self):
""" increment sequence number, wrapping if needed """
interface = self.phy_interface
self.test.logger.debug(ppp("Sending packet:", packet))
interface.add_stream(packet)
+ self.tx_packets += 1
self.test.pg_start()
def verify_sha1_auth(self, packet):
if time_left < 0:
raise CaptureTimeoutError("Packet did not arrive within timeout")
p = test.pg0.wait_for_packet(timeout=time_left)
+ test.test_session.rx_packets += 1
test.logger.debug(ppp("BFD: Got packet:", p))
if pcap_time_min is not None and p.time < pcap_time_min:
test.logger.debug(ppp("BFD: ignoring packet (pcap time %s < "
return p
+BFDStats = namedtuple("BFDStats", "rx rx_echo tx tx_echo")
+
+
+def bfd_grab_stats_snapshot(test, bs_idx=0, thread_index=None):
+ s = test.statistics
+ ti = thread_index
+ if ti is None:
+ rx = s['/bfd/rx-session-counters'][:, bs_idx].sum_packets()
+ rx_echo = s['/bfd/rx-session-echo-counters'][:, bs_idx].sum_packets()
+ tx = s['/bfd/tx-session-counters'][:, bs_idx].sum_packets()
+ tx_echo = s['/bfd/tx-session-echo-counters'][:, bs_idx].sum_packets()
+ else:
+ rx = s['/bfd/rx-session-counters'][ti, bs_idx].sum_packets()
+ rx_echo = s['/bfd/rx-session-echo-counters'][ti, bs_idx].sum_packets()
+ tx = s['/bfd/tx-session-counters'][ti, bs_idx].sum_packets()
+ tx_echo = s['/bfd/tx-session-echo-counters'][ti, bs_idx].sum_packets()
+ return BFDStats(rx, rx_echo, tx, tx_echo)
+
+
+def bfd_stats_diff(stats_before, stats_after):
+ rx = stats_after.rx - stats_before.rx
+ rx_echo = stats_after.rx_echo - stats_before.rx_echo
+ tx = stats_after.tx - stats_before.tx
+ tx_echo = stats_after.tx_echo - stats_before.tx_echo
+ return BFDStats(rx, rx_echo, tx, tx_echo)
+
+
@tag_run_solo
class BFD4TestCase(VppTestCase):
"""Bidirectional Forwarding Detection (BFD)"""
self.vapi.want_bfd_events()
self.pg0.enable_capture()
try:
+ self.bfd_udp4_sessions = self.statistics['/bfd/udp4/sessions']
+ self.bfd_udp6_sessions = self.statistics['/bfd/udp6/sessions']
self.vpp_session = VppBFDUDPSession(self, self.pg0,
self.pg0.remote_ip4)
self.vpp_session.add_vpp_config()
def test_session_up(self):
""" bring BFD session up """
bfd_session_up(self)
+ bfd_udp4_sessions = self.statistics['/bfd/udp4/sessions']
+ bfd_udp6_sessions = self.statistics['/bfd/udp6/sessions']
+ self.assert_equal(bfd_udp4_sessions - self.bfd_udp4_sessions, 1)
+ self.assert_equal(bfd_udp6_sessions, self.bfd_udp6_sessions)
def test_session_up_by_ip(self):
""" bring BFD session up - first frame looked up by address pair """
def test_echo_looped_back(self):
""" echo packets looped back """
- # don't need a session in this case..
- self.vpp_session.remove_vpp_config()
+ bfd_session_up(self)
+ stats_before = bfd_grab_stats_snapshot(self)
self.pg0.enable_capture()
echo_packet_count = 10
# random source port low enough to increment a few times..
self.logger.debug(ppp("Sending packet:", echo_packet))
self.pg0.add_stream(echo_packet)
self.pg_start()
- for dummy in range(echo_packet_count):
+ self.logger.debug(self.vapi.ppcli("show trace"))
+ counter = 0
+ bfd_control_packets_rx = 0
+ while counter < echo_packet_count:
p = self.pg0.wait_for_packet(1)
self.logger.debug(ppp("Got packet:", p))
ether = p[Ether]
self.assert_equal(self.pg0.local_mac, ether.src, "Source MAC")
ip = p[IP]
self.assert_equal(self.pg0.remote_ip4, ip.dst, "Destination IP")
- self.assert_equal(self.pg0.remote_ip4, ip.src, "Destination IP")
udp = p[UDP]
+ if udp.dport == BFD.udp_dport:
+ bfd_control_packets_rx += 1
+ continue
+ self.assert_equal(self.pg0.remote_ip4, ip.src, "Source IP")
self.assert_equal(udp.dport, BFD.udp_dport_echo,
"UDP destination port")
self.assert_equal(udp.sport, udp_sport_rx, "UDP source port")
self.assertEqual(scapy.compat.raw(p[UDP].payload),
scapy.compat.raw(echo_packet[UDP].payload),
"Received packet is not the echo packet sent")
+ counter += 1
self.assert_equal(udp_sport_tx, udp_sport_rx, "UDP source port (== "
"ECHO packet identifier for test purposes)")
+ stats_after = bfd_grab_stats_snapshot(self)
+ diff = bfd_stats_diff(stats_before, stats_after)
+ self.assertEqual(
+ 0, diff.rx, "RX counter bumped but no BFD packets sent")
+ self.assertEqual(
+ bfd_control_packets_rx, diff.tx, "TX counter incorrect")
+ self.assertEqual(0, diff.rx_echo,
+ "RX echo counter bumped but no BFD session exists")
+ self.assertEqual(0, diff.tx_echo,
+ "TX echo counter bumped but no BFD session exists")
def test_echo(self):
""" echo function """
+ stats_before = bfd_grab_stats_snapshot(self)
bfd_session_up(self)
self.test_session.update(required_min_echo_rx=150000)
self.test_session.send_packet()
"ECHO packet destination MAC address")
p[Ether].dst = self.pg0.local_mac
self.pg0.add_stream(p)
+ self.test_session.rx_packets_echo += 1
+ self.test_session.tx_packets_echo += 1
self.pg_start()
echo_seen = True
elif p.haslayer(BFD):
+ self.test_session.rx_packets += 1
if echo_seen:
self.assertGreaterEqual(
p[BFD].required_min_rx_interval,
self.test_session.send_packet()
self.assertTrue(echo_seen, "No echo packets received")
+ stats_after = bfd_grab_stats_snapshot(self)
+ diff = bfd_stats_diff(stats_before, stats_after)
+ # our rx is vpp tx and vice versa, also tolerate one packet off
+ self.assert_in_range(self.test_session.tx_packets,
+ diff.rx - 1, diff.rx + 1, "RX counter")
+ self.assert_in_range(self.test_session.rx_packets,
+ diff.tx - 1, diff.tx + 1, "TX counter")
+ self.assert_in_range(self.test_session.tx_packets_echo,
+ diff.rx_echo - 1, diff.rx_echo + 1,
+ "RX echo counter")
+ self.assert_in_range(self.test_session.rx_packets_echo,
+ diff.tx_echo - 1, diff.tx_echo + 1,
+ "TX echo counter")
+
def test_echo_fail(self):
""" session goes down if echo function fails """
bfd_session_up(self)
self.vapi.want_bfd_events()
self.pg0.enable_capture()
try:
+ self.bfd_udp4_sessions = self.statistics['/bfd/udp4/sessions']
+ self.bfd_udp6_sessions = self.statistics['/bfd/udp6/sessions']
self.vpp_session = VppBFDUDPSession(self, self.pg0,
self.pg0.remote_ip6,
af=AF_INET6)
def test_session_up(self):
""" bring BFD session up """
bfd_session_up(self)
+ bfd_udp4_sessions = self.statistics['/bfd/udp4/sessions']
+ bfd_udp6_sessions = self.statistics['/bfd/udp6/sessions']
+ self.assert_equal(bfd_udp4_sessions, self.bfd_udp4_sessions)
+ self.assert_equal(bfd_udp6_sessions - self.bfd_udp6_sessions, 1)
def test_session_up_by_ip(self):
""" bring BFD session up - first frame looked up by address pair """
def test_echo_looped_back(self):
""" echo packets looped back """
- # don't need a session in this case..
- self.vpp_session.remove_vpp_config()
+ bfd_session_up(self)
+ stats_before = bfd_grab_stats_snapshot(self)
self.pg0.enable_capture()
echo_packet_count = 10
# random source port low enough to increment a few times..
self.logger.debug(ppp("Sending packet:", echo_packet))
self.pg0.add_stream(echo_packet)
self.pg_start()
- for dummy in range(echo_packet_count):
+ counter = 0
+ bfd_control_packets_rx = 0
+ while counter < echo_packet_count:
p = self.pg0.wait_for_packet(1)
self.logger.debug(ppp("Got packet:", p))
ether = p[Ether]
self.assert_equal(self.pg0.local_mac, ether.src, "Source MAC")
ip = p[IPv6]
self.assert_equal(self.pg0.remote_ip6, ip.dst, "Destination IP")
- self.assert_equal(self.pg0.remote_ip6, ip.src, "Destination IP")
udp = p[UDP]
+ if udp.dport == BFD.udp_dport:
+ bfd_control_packets_rx += 1
+ continue
+ self.assert_equal(self.pg0.remote_ip6, ip.src, "Source IP")
self.assert_equal(udp.dport, BFD.udp_dport_echo,
"UDP destination port")
self.assert_equal(udp.sport, udp_sport_rx, "UDP source port")
self.assertEqual(scapy.compat.raw(p[UDP].payload),
scapy.compat.raw(echo_packet[UDP].payload),
"Received packet is not the echo packet sent")
+ counter += 1
self.assert_equal(udp_sport_tx, udp_sport_rx, "UDP source port (== "
"ECHO packet identifier for test purposes)")
- self.assert_equal(udp_sport_tx, udp_sport_rx, "UDP source port (== "
- "ECHO packet identifier for test purposes)")
+ stats_after = bfd_grab_stats_snapshot(self)
+ diff = bfd_stats_diff(stats_before, stats_after)
+ self.assertEqual(
+ 0, diff.rx, "RX counter bumped but no BFD packets sent")
+ self.assertEqual(bfd_control_packets_rx,
+ diff.tx, "TX counter incorrect")
+ self.assertEqual(0, diff.rx_echo,
+ "RX echo counter bumped but no BFD session exists")
+ self.assertEqual(0, diff.tx_echo,
+ "TX echo counter bumped but no BFD session exists")
def test_echo(self):
""" echo function """
+ stats_before = bfd_grab_stats_snapshot(self)
bfd_session_up(self)
self.test_session.update(required_min_echo_rx=150000)
self.test_session.send_packet()
self.logger.debug(ppp("Looping back packet:", p))
self.assert_equal(p[Ether].dst, self.pg0.remote_mac,
"ECHO packet destination MAC address")
+ self.test_session.rx_packets_echo += 1
+ self.test_session.tx_packets_echo += 1
p[Ether].dst = self.pg0.local_mac
self.pg0.add_stream(p)
self.pg_start()
echo_seen = True
elif p.haslayer(BFD):
+ self.test_session.rx_packets += 1
if echo_seen:
self.assertGreaterEqual(
p[BFD].required_min_rx_interval,
self.test_session.send_packet()
self.assertTrue(echo_seen, "No echo packets received")
+ stats_after = bfd_grab_stats_snapshot(self)
+ diff = bfd_stats_diff(stats_before, stats_after)
+ # our rx is vpp tx and vice versa, also tolerate one packet off
+ self.assert_in_range(self.test_session.tx_packets,
+ diff.rx - 1, diff.rx + 1, "RX counter")
+ self.assert_in_range(self.test_session.rx_packets,
+ diff.tx - 1, diff.tx + 1, "TX counter")
+ self.assert_in_range(self.test_session.tx_packets_echo,
+ diff.rx_echo - 1, diff.rx_echo + 1,
+ "RX echo counter")
+ self.assert_in_range(self.test_session.rx_packets_echo,
+ diff.tx_echo - 1, diff.tx_echo + 1,
+ "TX echo counter")
+
def test_intf_deleted(self):
""" interface with bfd session deleted """
intf = VppLoInterface(self)
Code Review / vpp.git / blobdiff