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-rw-r--r--test/test_gtpu.py289
1 files changed, 289 insertions, 0 deletions
diff --git a/test/test_gtpu.py b/test/test_gtpu.py
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+++ b/test/test_gtpu.py
@@ -0,0 +1,289 @@
+#!/usr/bin/env python
+
+import socket
+from util import ip4n_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 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)