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Diffstat (limited to 'test/test_gtpu.py')
| -rw-r--r-- | test/test_gtpu.py | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/test/test_gtpu.py b/test/test_gtpu.py new file mode 100644 index 00000000..9411fffc --- /dev/null +++ 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) |