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Diffstat (limited to 'test/test_vxlan_gbp.py')
| -rw-r--r-- | test/test_vxlan_gbp.py | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/test/test_vxlan_gbp.py b/test/test_vxlan_gbp.py new file mode 100644 index 00000000000..55594a59fa7 --- /dev/null +++ b/test/test_vxlan_gbp.py @@ -0,0 +1,277 @@ +#!/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.layers.vxlan import VXLAN +from scapy.utils import atol + +import StringIO + + +def reassemble(listoffragments): + buffer = StringIO.StringIO() + first = listoffragments[0] + buffer.seek(20) + for pkt in listoffragments: + buffer.seek(pkt[IP].frag*8) + buffer.write(pkt[IP].payload) + first.len = len(buffer.getvalue()) + 20 + first.flags = 0 + del(first.chksum) + header = str(first[Ether])[:34] + return first[Ether].__class__(header + buffer.getvalue()) + + +class TestVxlanGbp(VppTestCase): + """ VXLAN GBP Test Case """ + + @property + def frame_request(self): + """ Ethernet frame modeling a generic request """ + return (Ether(src='00:00:00:00:00:01', dst='00:00:00:00:00:02') / + IP(src='1.2.3.4', dst='4.3.2.1') / + UDP(sport=10000, dport=20000) / + Raw('\xa5' * 100)) + + @property + def frame_reply(self): + """ Ethernet frame modeling a generic reply """ + return (Ether(src='00:00:00:00:00:02', dst='00:00:00:00:00:01') / + IP(src='4.3.2.1', dst='1.2.3.4') / + UDP(sport=20000, dport=10000) / + Raw('\xa5' * 100)) + + def encapsulate(self, pkt, vni): + """ + Encapsulate the original payload frame by adding VXLAN GBP 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) / + VXLAN(vni=vni, flags=self.flags, gpflags=self.gpflags, + gpid=self.sclass) / pkt) + + def ip_range(self, start, end): + """ range of remote ip's """ + return ip4_range(self.pg0.remote_ip4, start, end) + + def decapsulate(self, pkt): + """ + Decapsulate the original payload frame by removing VXLAN header + """ + # check if is set G and I flag + self.assertEqual(pkt[VXLAN].flags, int('0x88', 16)) + return pkt[VXLAN].payload + + # Method for checking VXLAN GBP encapsulation. + # + def check_encapsulation(self, pkt, vni, local_only=False, mcast_pkt=False): + # TODO: add error messages + # 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 VXLAN GBP 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 VXLAN GBP 48879, source UDP port could + # be arbitrary. + self.assertEqual(pkt[UDP].dport, type(self).dport) + # TODO: checksum check + # Verify VNI + # pkt.show() + self.assertEqual(pkt[VXLAN].vni, vni) + # Verify Source Class + self.assertEqual(pkt[VXLAN].gpid, 0) + + @classmethod + def create_vxlan_gbp_flood_test_bd(cls, vni, n_ucast_tunnels): + # Create 2 ucast vxlan 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.vxlan_gbp_add_del_tunnel( + src_addr=cls.pg0.local_ip4n, + dst_addr=dest_ip4n, + vni=vni) + cls.vapi.sw_interface_set_l2_bridge(r.sw_if_index, bd_id=vni) + + # Class method to start the VXLAN GBP 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(TestVxlanGbp, cls).setUpClass() + + try: + cls.dport = 48879 + cls.flags = 0x88 + cls.gpflags = 0x0 + cls.sclass = 0 + + # 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() + + # Create VXLAN GBP VTEP on VPP pg0, and put vxlan_gbp_tunnel0 and + # pg1 into BD. + cls.single_tunnel_bd = 1 + r = cls.vapi.vxlan_gbp_add_del_tunnel( + src_addr=cls.pg0.local_ip4n, + dst_addr=cls.pg0.remote_ip4n, + vni=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 vni 2 to test multicast flooding + cls.n_ucast_tunnels = 2 + # Setup vni 3 to test unicast flooding + cls.ucast_flood_bd = 3 + cls.create_vxlan_gbp_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(TestVxlanGbp, cls).tearDownClass() + raise + + def assert_eq_pkts(self, pkt1, pkt2): + """ Verify the Ether, IP, UDP, payload are equal in both + packets + """ + self.assertEqual(pkt1[Ether].src, pkt2[Ether].src) + self.assertEqual(pkt1[Ether].dst, pkt2[Ether].dst) + self.assertEqual(pkt1[IP].src, pkt2[IP].src) + self.assertEqual(pkt1[IP].dst, pkt2[IP].dst) + self.assertEqual(pkt1[UDP].sport, pkt2[UDP].sport) + self.assertEqual(pkt1[UDP].dport, pkt2[UDP].dport) + self.assertEqual(pkt1[Raw], pkt2[Raw]) + + def test_decap(self): + """ Decapsulation test + Send encapsulated frames from pg0 + Verify receipt of decapsulated frames on pg1 + """ + encapsulated_pkt = self.encapsulate(self.frame_request, + self.single_tunnel_bd) + + self.pg0.add_stream([encapsulated_pkt, ]) + + self.pg1.enable_capture() + + self.pg_start() + + # Pick first received frame and check if it's the non-encapsulated + # frame + out = self.pg1.get_capture(1) + pkt = out[0] + self.assert_eq_pkts(pkt, self.frame_request) + + 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_encap_big_packet(self): + """ Encapsulation test send big frame from pg1 + Verify receipt of encapsulated frames on pg0 + """ + + self.vapi.sw_interface_set_mtu(self.pg0.sw_if_index, [1500, 0, 0, 0]) + + frame = (Ether(src='00:00:00:00:00:02', dst='00:00:00:00:00:01') / + IP(src='4.3.2.1', dst='1.2.3.4') / + UDP(sport=20000, dport=10000) / + Raw('\xa5' * 1450)) + + self.pg1.add_stream([frame]) + + self.pg0.enable_capture() + + self.pg_start() + + # Pick first received frame and check if it's correctly encapsulated. + out = self.pg0.get_capture(2) + pkt = reassemble(out) + self.check_encapsulation(pkt, self.single_tunnel_bd) + + payload = self.decapsulate(pkt) + self.assert_eq_pkts(payload, frame) + +# 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(TestVxlanGbp, self).tearDown() + if not self.vpp_dead: + self.logger.info(self.vapi.cli("show bridge-domain 1 detail")) + self.logger.info(self.vapi.cli("show bridge-domain 3 detail")) + self.logger.info(self.vapi.cli("show vxlan-gbp tunnel")) + self.logger.info(self.vapi.cli("show error")) + + +if __name__ == '__main__': + unittest.main(testRunner=VppTestRunner) |