| #!/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(dst_address=dest_ip4n, |
| dst_address_length=32, |
| next_hop_address=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(rx_sw_if_index=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 ValueError("bad sw_if_index: ~0") |
| |
| @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(rx_sw_if_index=r.sw_if_index, |
| bd_id=cls.single_tunnel_bd) |
| cls.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=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(rx_sw_if_index=r.sw_if_index, |
| bd_id=cls.mcast_flood_bd) |
| cls.vapi.sw_interface_set_l2_bridge( |
| rx_sw_if_index=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( |
| rx_sw_if_index=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) |