vpp - Vector Packet Processing

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Diffstat (limited to 'src/vppinfra')

-rw-r--r--

2 files changed, 19 insertions, 37 deletions

#!/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 correctly 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 correctly 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 correctly 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 @classmethod def tearDownClass(cls): super(TestGtpu, cls).tearDownClass() # 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() def show_commands_at_teardown(self): 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)


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