vpp/test/test_gtpu.py
Eyal Bari cef1e2a8b4 test:vxlan over ipv6 tests
Change-Id: Id910db0e3a07ecc6f469e2f0d1e97f39ba48cc60
Signed-off-by: Eyal Bari <ebari@cisco.com>
2018-06-21 19:21:36 +00:00

294 lines
11 KiB
Python

#!/usr/bin/env python
import socket
from util import ip4n_range, ip4_range
import unittest
from framework import VppTestCase, VppTestRunner
from template_bd import BridgeDomain
from scapy.layers.l2 import Ether, Raw
from scapy.layers.inet import IP, UDP
from scapy.contrib.gtp import GTP_U_Header
from scapy.utils import atol
class TestGtpu(BridgeDomain, VppTestCase):
""" GTPU Test Case """
def __init__(self, *args):
BridgeDomain.__init__(self)
VppTestCase.__init__(self, *args)
def encapsulate(self, pkt, vni):
"""
Encapsulate the original payload frame by adding GTPU header with its
UDP, IP and Ethernet fields
"""
return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
UDP(sport=self.dport, dport=self.dport, chksum=0) /
GTP_U_Header(teid=vni, gtp_type=self.gtp_type, length=150) /
pkt)
def ip_range(self, start, end):
""" range of remote ip's """
return ip4_range(self.pg0.remote_ip4, start, end)
def encap_mcast(self, pkt, src_ip, src_mac, vni):
"""
Encapsulate the original payload frame by adding GTPU header with its
UDP, IP and Ethernet fields
"""
return (Ether(src=src_mac, dst=self.mcast_mac) /
IP(src=src_ip, dst=self.mcast_ip4) /
UDP(sport=self.dport, dport=self.dport, chksum=0) /
GTP_U_Header(teid=vni, gtp_type=self.gtp_type, length=150) /
pkt)
def decapsulate(self, pkt):
"""
Decapsulate the original payload frame by removing GTPU header
"""
return pkt[GTP_U_Header].payload
# Method for checking GTPU encapsulation.
#
def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False):
# Verify source MAC is VPP_MAC and destination MAC is MY_MAC resolved
# by VPP using ARP.
self.assertEqual(pkt[Ether].src, self.pg0.local_mac)
if not local_only:
if not mcast_pkt:
self.assertEqual(pkt[Ether].dst, self.pg0.remote_mac)
else:
self.assertEqual(pkt[Ether].dst, type(self).mcast_mac)
# Verify GTPU tunnel source IP is VPP_IP and destination IP is MY_IP.
self.assertEqual(pkt[IP].src, self.pg0.local_ip4)
if not local_only:
if not mcast_pkt:
self.assertEqual(pkt[IP].dst, self.pg0.remote_ip4)
else:
self.assertEqual(pkt[IP].dst, type(self).mcast_ip4)
# Verify UDP destination port is GTPU 2152, source UDP port could be
# arbitrary.
self.assertEqual(pkt[UDP].dport, type(self).dport)
# Verify teid
self.assertEqual(pkt[GTP_U_Header].teid, vni)
def test_encap(self):
""" Encapsulation test
Send frames from pg1
Verify receipt of encapsulated frames on pg0
"""
self.pg1.add_stream([self.frame_reply])
self.pg0.enable_capture()
self.pg_start()
# Pick first received frame and check if it's corectly encapsulated.
out = self.pg0.get_capture(1)
pkt = out[0]
self.check_encapsulation(pkt, self.single_tunnel_bd)
# payload = self.decapsulate(pkt)
# self.assert_eq_pkts(payload, self.frame_reply)
def test_ucast_flood(self):
""" Unicast flood test
Send frames from pg3
Verify receipt of encapsulated frames on pg0
"""
self.pg3.add_stream([self.frame_reply])
self.pg0.enable_capture()
self.pg_start()
# Get packet from each tunnel and assert it's corectly encapsulated.
out = self.pg0.get_capture(self.n_ucast_tunnels)
for pkt in out:
self.check_encapsulation(pkt, self.ucast_flood_bd, True)
# payload = self.decapsulate(pkt)
# self.assert_eq_pkts(payload, self.frame_reply)
def test_mcast_flood(self):
""" Multicast flood test
Send frames from pg2
Verify receipt of encapsulated frames on pg0
"""
self.pg2.add_stream([self.frame_reply])
self.pg0.enable_capture()
self.pg_start()
# Pick first received frame and check if it's corectly encapsulated.
out = self.pg0.get_capture(1)
pkt = out[0]
self.check_encapsulation(pkt, self.mcast_flood_bd,
local_only=False, mcast_pkt=True)
# payload = self.decapsulate(pkt)
# self.assert_eq_pkts(payload, self.frame_reply)
@classmethod
def create_gtpu_flood_test_bd(cls, teid, n_ucast_tunnels):
# Create 10 ucast gtpu tunnels under bd
ip_range_start = 10
ip_range_end = ip_range_start + n_ucast_tunnels
next_hop_address = cls.pg0.remote_ip4n
for dest_ip4n in ip4n_range(next_hop_address, ip_range_start,
ip_range_end):
# add host route so dest_ip4n will not be resolved
cls.vapi.ip_add_del_route(dest_ip4n, 32, next_hop_address)
r = cls.vapi.gtpu_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=dest_ip4n,
teid=teid)
cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=teid)
@classmethod
def add_del_shared_mcast_dst_load(cls, is_add):
"""
add or del tunnels sharing the same mcast dst
to test gtpu ref_count mechanism
"""
n_shared_dst_tunnels = 20
teid_start = 1000
teid_end = teid_start + n_shared_dst_tunnels
for teid in range(teid_start, teid_end):
r = cls.vapi.gtpu_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=cls.mcast_ip4n,
mcast_sw_if_index=1,
teid=teid,
is_add=is_add)
if r.sw_if_index == 0xffffffff:
raise "bad sw_if_index"
@classmethod
def add_shared_mcast_dst_load(cls):
cls.add_del_shared_mcast_dst_load(is_add=1)
@classmethod
def del_shared_mcast_dst_load(cls):
cls.add_del_shared_mcast_dst_load(is_add=0)
@classmethod
def add_del_mcast_tunnels_load(cls, is_add):
"""
add or del tunnels to test gtpu stability
"""
n_distinct_dst_tunnels = 20
ip_range_start = 10
ip_range_end = ip_range_start + n_distinct_dst_tunnels
for dest_ip4n in ip4n_range(cls.mcast_ip4n, ip_range_start,
ip_range_end):
teid = bytearray(dest_ip4n)[3]
cls.vapi.gtpu_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=dest_ip4n,
mcast_sw_if_index=1,
teid=teid,
is_add=is_add)
@classmethod
def add_mcast_tunnels_load(cls):
cls.add_del_mcast_tunnels_load(is_add=1)
@classmethod
def del_mcast_tunnels_load(cls):
cls.add_del_mcast_tunnels_load(is_add=0)
# Class method to start the GTPU test case.
# Overrides setUpClass method in VppTestCase class.
# Python try..except statement is used to ensure that the tear down of
# the class will be executed even if exception is raised.
# @param cls The class pointer.
@classmethod
def setUpClass(cls):
super(TestGtpu, cls).setUpClass()
try:
cls.dport = 2152
cls.gtp_type = 0xff
# Create 2 pg interfaces.
cls.create_pg_interfaces(range(4))
for pg in cls.pg_interfaces:
pg.admin_up()
# Configure IPv4 addresses on VPP pg0.
cls.pg0.config_ip4()
# Resolve MAC address for VPP's IP address on pg0.
cls.pg0.resolve_arp()
# Our Multicast address
cls.mcast_ip4 = '239.1.1.1'
cls.mcast_ip4n = socket.inet_pton(socket.AF_INET, cls.mcast_ip4)
iplong = atol(cls.mcast_ip4)
cls.mcast_mac = "01:00:5e:%02x:%02x:%02x" % (
(iplong >> 16) & 0x7F, (iplong >> 8) & 0xFF, iplong & 0xFF)
# Create GTPU VTEP on VPP pg0, and put gtpu_tunnel0 and pg1
# into BD.
cls.single_tunnel_bd = 11
r = cls.vapi.gtpu_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=cls.pg0.remote_ip4n,
teid=cls.single_tunnel_bd)
cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index,
bd_id=cls.single_tunnel_bd)
cls.vapi.sw_interface_set_l2_bridge(cls.pg1.sw_if_index,
bd_id=cls.single_tunnel_bd)
# Setup teid 2 to test multicast flooding
cls.n_ucast_tunnels = 10
cls.mcast_flood_bd = 12
cls.create_gtpu_flood_test_bd(cls.mcast_flood_bd,
cls.n_ucast_tunnels)
r = cls.vapi.gtpu_add_del_tunnel(
src_addr=cls.pg0.local_ip4n,
dst_addr=cls.mcast_ip4n,
mcast_sw_if_index=1,
teid=cls.mcast_flood_bd)
cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index,
bd_id=cls.mcast_flood_bd)
cls.vapi.sw_interface_set_l2_bridge(cls.pg2.sw_if_index,
bd_id=cls.mcast_flood_bd)
# Add and delete mcast tunnels to check stability
cls.add_shared_mcast_dst_load()
cls.add_mcast_tunnels_load()
cls.del_shared_mcast_dst_load()
cls.del_mcast_tunnels_load()
# Setup teid 3 to test unicast flooding
cls.ucast_flood_bd = 13
cls.create_gtpu_flood_test_bd(cls.ucast_flood_bd,
cls.n_ucast_tunnels)
cls.vapi.sw_interface_set_l2_bridge(cls.pg3.sw_if_index,
bd_id=cls.ucast_flood_bd)
except Exception:
super(TestGtpu, cls).tearDownClass()
raise
# Method to define VPP actions before tear down of the test case.
# Overrides tearDown method in VppTestCase class.
# @param self The object pointer.
def tearDown(self):
super(TestGtpu, self).tearDown()
if not self.vpp_dead:
self.logger.info(self.vapi.cli("show bridge-domain 11 detail"))
self.logger.info(self.vapi.cli("show bridge-domain 12 detail"))
self.logger.info(self.vapi.cli("show bridge-domain 13 detail"))
self.logger.info(self.vapi.cli("show int"))
self.logger.info(self.vapi.cli("show gtpu tunnel"))
self.logger.info(self.vapi.cli("show trace"))
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)