| #!/usr/bin/env python |
| import random |
| import socket |
| import unittest |
| |
| from framework import VppTestCase, VppTestRunner |
| from vpp_sub_interface import VppSubInterface, VppDot1QSubint, VppDot1ADSubint |
| from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpMRoute, \ |
| VppMRoutePath, MRouteItfFlags, MRouteEntryFlags |
| |
| from scapy.packet import Raw |
| from scapy.layers.l2 import Ether, Dot1Q, ARP |
| from scapy.layers.inet import IP, UDP, ICMP, icmptypes, icmpcodes |
| from util import ppp |
| |
| |
| class TestIPv4(VppTestCase): |
| """ IPv4 Test Case """ |
| |
| def setUp(self): |
| """ |
| Perform test setup before test case. |
| |
| **Config:** |
| - create 3 pg interfaces |
| - untagged pg0 interface |
| - Dot1Q subinterface on pg1 |
| - Dot1AD subinterface on pg2 |
| - setup interfaces: |
| - put it into UP state |
| - set IPv4 addresses |
| - resolve neighbor address using ARP |
| - configure 200 fib entries |
| |
| :ivar list interfaces: pg interfaces and subinterfaces. |
| :ivar dict flows: IPv4 packet flows in test. |
| :ivar list pg_if_packet_sizes: packet sizes in test. |
| """ |
| super(TestIPv4, self).setUp() |
| |
| # create 3 pg interfaces |
| self.create_pg_interfaces(range(3)) |
| |
| # create 2 subinterfaces for pg1 and pg2 |
| self.sub_interfaces = [ |
| VppDot1QSubint(self, self.pg1, 100), |
| VppDot1ADSubint(self, self.pg2, 200, 300, 400)] |
| |
| # packet flows mapping pg0 -> pg1.sub, pg2.sub, etc. |
| self.flows = dict() |
| self.flows[self.pg0] = [self.pg1.sub_if, self.pg2.sub_if] |
| self.flows[self.pg1.sub_if] = [self.pg0, self.pg2.sub_if] |
| self.flows[self.pg2.sub_if] = [self.pg0, self.pg1.sub_if] |
| |
| # packet sizes |
| self.pg_if_packet_sizes = [64, 512, 1518, 9018] |
| self.sub_if_packet_sizes = [64, 512, 1518 + 4, 9018 + 4] |
| |
| self.interfaces = list(self.pg_interfaces) |
| self.interfaces.extend(self.sub_interfaces) |
| |
| # setup all interfaces |
| for i in self.interfaces: |
| i.admin_up() |
| i.config_ip4() |
| i.resolve_arp() |
| |
| # config 2M FIB entries |
| self.config_fib_entries(200) |
| |
| def tearDown(self): |
| """Run standard test teardown and log ``show ip arp``.""" |
| super(TestIPv4, self).tearDown() |
| if not self.vpp_dead: |
| self.logger.info(self.vapi.cli("show ip arp")) |
| # info(self.vapi.cli("show ip fib")) # many entries |
| |
| def config_fib_entries(self, count): |
| """For each interface add to the FIB table *count* routes to |
| "10.0.0.1/32" destination with interface's local address as next-hop |
| address. |
| |
| :param int count: Number of FIB entries. |
| |
| - *TODO:* check if the next-hop address shouldn't be remote address |
| instead of local address. |
| """ |
| n_int = len(self.interfaces) |
| percent = 0 |
| counter = 0.0 |
| dest_addr = socket.inet_pton(socket.AF_INET, "10.0.0.1") |
| dest_addr_len = 32 |
| for i in self.interfaces: |
| next_hop_address = i.local_ip4n |
| for j in range(count / n_int): |
| self.vapi.ip_add_del_route( |
| dest_addr, dest_addr_len, next_hop_address) |
| counter += 1 |
| if counter / count * 100 > percent: |
| self.logger.info("Configure %d FIB entries .. %d%% done" % |
| (count, percent)) |
| percent += 1 |
| |
| def create_stream(self, src_if, packet_sizes): |
| """Create input packet stream for defined interface. |
| |
| :param VppInterface src_if: Interface to create packet stream for. |
| :param list packet_sizes: Required packet sizes. |
| """ |
| pkts = [] |
| for i in range(0, 257): |
| dst_if = self.flows[src_if][i % 2] |
| info = self.create_packet_info(src_if, dst_if) |
| payload = self.info_to_payload(info) |
| p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) / |
| IP(src=src_if.remote_ip4, dst=dst_if.remote_ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw(payload)) |
| info.data = p.copy() |
| if isinstance(src_if, VppSubInterface): |
| p = src_if.add_dot1_layer(p) |
| size = packet_sizes[(i // 2) % len(packet_sizes)] |
| self.extend_packet(p, size) |
| pkts.append(p) |
| return pkts |
| |
| def verify_capture(self, dst_if, capture): |
| """Verify captured input packet stream for defined interface. |
| |
| :param VppInterface dst_if: Interface to verify captured packet stream |
| for. |
| :param list capture: Captured packet stream. |
| """ |
| self.logger.info("Verifying capture on interface %s" % dst_if.name) |
| last_info = dict() |
| for i in self.interfaces: |
| last_info[i.sw_if_index] = None |
| is_sub_if = False |
| dst_sw_if_index = dst_if.sw_if_index |
| if hasattr(dst_if, 'parent'): |
| is_sub_if = True |
| for packet in capture: |
| if is_sub_if: |
| # Check VLAN tags and Ethernet header |
| packet = dst_if.remove_dot1_layer(packet) |
| self.assertTrue(Dot1Q not in packet) |
| try: |
| ip = packet[IP] |
| udp = packet[UDP] |
| payload_info = self.payload_to_info(str(packet[Raw])) |
| packet_index = payload_info.index |
| self.assertEqual(payload_info.dst, dst_sw_if_index) |
| self.logger.debug( |
| "Got packet on port %s: src=%u (id=%u)" % |
| (dst_if.name, payload_info.src, packet_index)) |
| next_info = self.get_next_packet_info_for_interface2( |
| payload_info.src, dst_sw_if_index, |
| last_info[payload_info.src]) |
| last_info[payload_info.src] = next_info |
| self.assertTrue(next_info is not None) |
| self.assertEqual(packet_index, next_info.index) |
| saved_packet = next_info.data |
| # Check standard fields |
| self.assertEqual(ip.src, saved_packet[IP].src) |
| self.assertEqual(ip.dst, saved_packet[IP].dst) |
| self.assertEqual(udp.sport, saved_packet[UDP].sport) |
| self.assertEqual(udp.dport, saved_packet[UDP].dport) |
| except: |
| self.logger.error(ppp("Unexpected or invalid packet:", packet)) |
| raise |
| for i in self.interfaces: |
| remaining_packet = self.get_next_packet_info_for_interface2( |
| i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index]) |
| self.assertTrue(remaining_packet is None, |
| "Interface %s: Packet expected from interface %s " |
| "didn't arrive" % (dst_if.name, i.name)) |
| |
| def test_fib(self): |
| """ IPv4 FIB test |
| |
| Test scenario: |
| |
| - Create IPv4 stream for pg0 interface |
| - Create IPv4 tagged streams for pg1's and pg2's subinterface. |
| - Send and verify received packets on each interface. |
| """ |
| |
| pkts = self.create_stream(self.pg0, self.pg_if_packet_sizes) |
| self.pg0.add_stream(pkts) |
| |
| for i in self.sub_interfaces: |
| pkts = self.create_stream(i, self.sub_if_packet_sizes) |
| i.parent.add_stream(pkts) |
| |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| pkts = self.pg0.get_capture() |
| self.verify_capture(self.pg0, pkts) |
| |
| for i in self.sub_interfaces: |
| pkts = i.parent.get_capture() |
| self.verify_capture(i, pkts) |
| |
| |
| class TestIPv4FibCrud(VppTestCase): |
| """ FIB - add/update/delete - ip4 routes |
| |
| Test scenario: |
| - add 1k, |
| - del 100, |
| - add new 1k, |
| - del 1.5k |
| |
| ..note:: Python API is too slow to add many routes, needs replacement. |
| """ |
| |
| def config_fib_many_to_one(self, start_dest_addr, next_hop_addr, count): |
| """ |
| |
| :param start_dest_addr: |
| :param next_hop_addr: |
| :param count: |
| :return list: added ips with 32 prefix |
| """ |
| added_ips = [] |
| dest_addr = int(socket.inet_pton(socket.AF_INET, |
| start_dest_addr).encode('hex'), |
| 16) |
| dest_addr_len = 32 |
| n_next_hop_addr = socket.inet_pton(socket.AF_INET, next_hop_addr) |
| for _ in range(count): |
| n_dest_addr = '{:08x}'.format(dest_addr).decode('hex') |
| self.vapi.ip_add_del_route(n_dest_addr, dest_addr_len, |
| n_next_hop_addr) |
| added_ips.append(socket.inet_ntoa(n_dest_addr)) |
| dest_addr += 1 |
| return added_ips |
| |
| def unconfig_fib_many_to_one(self, start_dest_addr, next_hop_addr, count): |
| |
| removed_ips = [] |
| dest_addr = int(socket.inet_pton(socket.AF_INET, |
| start_dest_addr).encode('hex'), |
| 16) |
| dest_addr_len = 32 |
| n_next_hop_addr = socket.inet_pton(socket.AF_INET, next_hop_addr) |
| for _ in range(count): |
| n_dest_addr = '{:08x}'.format(dest_addr).decode('hex') |
| self.vapi.ip_add_del_route(n_dest_addr, dest_addr_len, |
| n_next_hop_addr, is_add=0) |
| removed_ips.append(socket.inet_ntoa(n_dest_addr)) |
| dest_addr += 1 |
| return removed_ips |
| |
| def create_stream(self, src_if, dst_if, dst_ips, count): |
| pkts = [] |
| |
| for _ in range(count): |
| dst_addr = random.choice(dst_ips) |
| info = self.create_packet_info(src_if, dst_if) |
| payload = self.info_to_payload(info) |
| p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) / |
| IP(src=src_if.remote_ip4, dst=dst_addr) / |
| UDP(sport=1234, dport=1234) / |
| Raw(payload)) |
| info.data = p.copy() |
| self.extend_packet(p, random.choice(self.pg_if_packet_sizes)) |
| pkts.append(p) |
| |
| return pkts |
| |
| def _find_ip_match(self, find_in, pkt): |
| for p in find_in: |
| if self.payload_to_info(str(p[Raw])) == \ |
| self.payload_to_info(str(pkt[Raw])): |
| if p[IP].src != pkt[IP].src: |
| break |
| if p[IP].dst != pkt[IP].dst: |
| break |
| if p[UDP].sport != pkt[UDP].sport: |
| break |
| if p[UDP].dport != pkt[UDP].dport: |
| break |
| return p |
| return None |
| |
| @staticmethod |
| def _match_route_detail(route_detail, ip, address_length=32, table_id=0): |
| if route_detail.address == socket.inet_pton(socket.AF_INET, ip): |
| if route_detail.table_id != table_id: |
| return False |
| elif route_detail.address_length != address_length: |
| return False |
| else: |
| return True |
| else: |
| return False |
| |
| def verify_capture(self, dst_interface, received_pkts, expected_pkts): |
| self.assertEqual(len(received_pkts), len(expected_pkts)) |
| to_verify = list(expected_pkts) |
| for p in received_pkts: |
| self.assertEqual(p.src, dst_interface.local_mac) |
| self.assertEqual(p.dst, dst_interface.remote_mac) |
| x = self._find_ip_match(to_verify, p) |
| to_verify.remove(x) |
| self.assertListEqual(to_verify, []) |
| |
| def verify_route_dump(self, fib_dump, ips): |
| |
| def _ip_in_route_dump(ip, fib_dump): |
| return next((route for route in fib_dump |
| if self._match_route_detail(route, ip)), |
| False) |
| |
| for ip in ips: |
| self.assertTrue(_ip_in_route_dump(ip, fib_dump), |
| 'IP {} is not in fib dump.'.format(ip)) |
| |
| def verify_not_in_route_dump(self, fib_dump, ips): |
| |
| def _ip_in_route_dump(ip, fib_dump): |
| return next((route for route in fib_dump |
| if self._match_route_detail(route, ip)), |
| False) |
| |
| for ip in ips: |
| self.assertFalse(_ip_in_route_dump(ip, fib_dump), |
| 'IP {} is in fib dump.'.format(ip)) |
| |
| @classmethod |
| def setUpClass(cls): |
| """ |
| #. Create and initialize 3 pg interfaces. |
| #. initialize class attributes configured_routes and deleted_routes |
| to store information between tests. |
| """ |
| super(TestIPv4FibCrud, cls).setUpClass() |
| |
| try: |
| # create 3 pg interfaces |
| cls.create_pg_interfaces(range(3)) |
| |
| cls.interfaces = list(cls.pg_interfaces) |
| |
| # setup all interfaces |
| for i in cls.interfaces: |
| i.admin_up() |
| i.config_ip4() |
| i.resolve_arp() |
| |
| cls.configured_routes = [] |
| cls.deleted_routes = [] |
| cls.pg_if_packet_sizes = [64, 512, 1518, 9018] |
| |
| except Exception: |
| super(TestIPv4FibCrud, cls).tearDownClass() |
| raise |
| |
| def setUp(self): |
| super(TestIPv4FibCrud, self).setUp() |
| self.reset_packet_infos() |
| |
| def test_1_add_routes(self): |
| """ Add 1k routes |
| |
| - add 100 routes check with traffic script. |
| """ |
| # config 1M FIB entries |
| self.configured_routes.extend(self.config_fib_many_to_one( |
| "10.0.0.0", self.pg0.remote_ip4, 100)) |
| |
| fib_dump = self.vapi.ip_fib_dump() |
| self.verify_route_dump(fib_dump, self.configured_routes) |
| |
| self.stream_1 = self.create_stream( |
| self.pg1, self.pg0, self.configured_routes, 100) |
| self.stream_2 = self.create_stream( |
| self.pg2, self.pg0, self.configured_routes, 100) |
| self.pg1.add_stream(self.stream_1) |
| self.pg2.add_stream(self.stream_2) |
| |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| pkts = self.pg0.get_capture(len(self.stream_1) + len(self.stream_2)) |
| self.verify_capture(self.pg0, pkts, self.stream_1 + self.stream_2) |
| |
| def test_2_del_routes(self): |
| """ Delete 100 routes |
| |
| - delete 10 routes check with traffic script. |
| """ |
| self.deleted_routes.extend(self.unconfig_fib_many_to_one( |
| "10.0.0.10", self.pg0.remote_ip4, 10)) |
| for x in self.deleted_routes: |
| self.configured_routes.remove(x) |
| |
| fib_dump = self.vapi.ip_fib_dump() |
| self.verify_route_dump(fib_dump, self.configured_routes) |
| |
| self.stream_1 = self.create_stream( |
| self.pg1, self.pg0, self.configured_routes, 100) |
| self.stream_2 = self.create_stream( |
| self.pg2, self.pg0, self.configured_routes, 100) |
| self.stream_3 = self.create_stream( |
| self.pg1, self.pg0, self.deleted_routes, 100) |
| self.stream_4 = self.create_stream( |
| self.pg2, self.pg0, self.deleted_routes, 100) |
| self.pg1.add_stream(self.stream_1 + self.stream_3) |
| self.pg2.add_stream(self.stream_2 + self.stream_4) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| pkts = self.pg0.get_capture(len(self.stream_1) + len(self.stream_2)) |
| self.verify_capture(self.pg0, pkts, self.stream_1 + self.stream_2) |
| |
| def test_3_add_new_routes(self): |
| """ Add 1k routes |
| |
| - re-add 5 routes check with traffic script. |
| - add 100 routes check with traffic script. |
| """ |
| tmp = self.config_fib_many_to_one( |
| "10.0.0.10", self.pg0.remote_ip4, 5) |
| self.configured_routes.extend(tmp) |
| for x in tmp: |
| self.deleted_routes.remove(x) |
| |
| self.configured_routes.extend(self.config_fib_many_to_one( |
| "10.0.1.0", self.pg0.remote_ip4, 100)) |
| |
| fib_dump = self.vapi.ip_fib_dump() |
| self.verify_route_dump(fib_dump, self.configured_routes) |
| |
| self.stream_1 = self.create_stream( |
| self.pg1, self.pg0, self.configured_routes, 300) |
| self.stream_2 = self.create_stream( |
| self.pg2, self.pg0, self.configured_routes, 300) |
| self.stream_3 = self.create_stream( |
| self.pg1, self.pg0, self.deleted_routes, 100) |
| self.stream_4 = self.create_stream( |
| self.pg2, self.pg0, self.deleted_routes, 100) |
| |
| self.pg1.add_stream(self.stream_1 + self.stream_3) |
| self.pg2.add_stream(self.stream_2 + self.stream_4) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| pkts = self.pg0.get_capture(len(self.stream_1) + len(self.stream_2)) |
| self.verify_capture(self.pg0, pkts, self.stream_1 + self.stream_2) |
| |
| def test_4_del_routes(self): |
| """ Delete 1.5k routes |
| |
| - delete 5 routes check with traffic script. |
| - add 100 routes check with traffic script. |
| """ |
| self.deleted_routes.extend(self.unconfig_fib_many_to_one( |
| "10.0.0.0", self.pg0.remote_ip4, 15)) |
| self.deleted_routes.extend(self.unconfig_fib_many_to_one( |
| "10.0.0.20", self.pg0.remote_ip4, 85)) |
| self.deleted_routes.extend(self.unconfig_fib_many_to_one( |
| "10.0.1.0", self.pg0.remote_ip4, 100)) |
| fib_dump = self.vapi.ip_fib_dump() |
| self.verify_not_in_route_dump(fib_dump, self.deleted_routes) |
| |
| |
| class TestIPNull(VppTestCase): |
| """ IPv4 routes via NULL """ |
| |
| def setUp(self): |
| super(TestIPNull, self).setUp() |
| |
| # create 2 pg interfaces |
| self.create_pg_interfaces(range(1)) |
| |
| for i in self.pg_interfaces: |
| i.admin_up() |
| i.config_ip4() |
| i.resolve_arp() |
| |
| def tearDown(self): |
| super(TestIPNull, self).tearDown() |
| for i in self.pg_interfaces: |
| i.unconfig_ip4() |
| i.admin_down() |
| |
| def test_ip_null(self): |
| """ IP NULL route """ |
| |
| # |
| # A route via IP NULL that will reply with ICMP unreachables |
| # |
| ip_unreach = VppIpRoute(self, "10.0.0.1", 32, [], is_unreach=1) |
| ip_unreach.add_vpp_config() |
| |
| p_unreach = (Ether(src=self.pg0.remote_mac, |
| dst=self.pg0.local_mac) / |
| IP(src=self.pg0.remote_ip4, dst="10.0.0.1") / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| self.pg0.add_stream(p_unreach) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg0.get_capture(1) |
| rx = rx[0] |
| icmp = rx[ICMP] |
| |
| self.assertEqual(icmptypes[icmp.type], "dest-unreach") |
| self.assertEqual(icmpcodes[icmp.type][icmp.code], "host-unreachable") |
| self.assertEqual(icmp.src, self.pg0.remote_ip4) |
| self.assertEqual(icmp.dst, "10.0.0.1") |
| |
| # |
| # ICMP replies are rate limited. so sit and spin. |
| # |
| self.sleep(1) |
| |
| # |
| # A route via IP NULL that will reply with ICMP prohibited |
| # |
| ip_prohibit = VppIpRoute(self, "10.0.0.2", 32, [], is_prohibit=1) |
| ip_prohibit.add_vpp_config() |
| |
| p_prohibit = (Ether(src=self.pg0.remote_mac, |
| dst=self.pg0.local_mac) / |
| IP(src=self.pg0.remote_ip4, dst="10.0.0.2") / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| self.pg0.add_stream(p_prohibit) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| |
| rx = self.pg0.get_capture(1) |
| |
| rx = rx[0] |
| icmp = rx[ICMP] |
| |
| self.assertEqual(icmptypes[icmp.type], "dest-unreach") |
| self.assertEqual(icmpcodes[icmp.type][icmp.code], "host-prohibited") |
| self.assertEqual(icmp.src, self.pg0.remote_ip4) |
| self.assertEqual(icmp.dst, "10.0.0.2") |
| |
| |
| class TestIPDisabled(VppTestCase): |
| """ IPv4 disabled """ |
| |
| def setUp(self): |
| super(TestIPDisabled, self).setUp() |
| |
| # create 2 pg interfaces |
| self.create_pg_interfaces(range(2)) |
| |
| # PG0 is IP enalbed |
| self.pg0.admin_up() |
| self.pg0.config_ip4() |
| self.pg0.resolve_arp() |
| |
| # PG 1 is not IP enabled |
| self.pg1.admin_up() |
| |
| def tearDown(self): |
| super(TestIPDisabled, self).tearDown() |
| for i in self.pg_interfaces: |
| i.unconfig_ip4() |
| i.admin_down() |
| |
| def send_and_assert_no_replies(self, intf, pkts, remark): |
| intf.add_stream(pkts) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| for i in self.pg_interfaces: |
| i.get_capture(0) |
| i.assert_nothing_captured(remark=remark) |
| |
| def test_ip_disabled(self): |
| """ IP Disabled """ |
| |
| # |
| # An (S,G). |
| # one accepting interface, pg0, 2 forwarding interfaces |
| # |
| route_232_1_1_1 = VppIpMRoute( |
| self, |
| "0.0.0.0", |
| "232.1.1.1", 32, |
| MRouteEntryFlags.MFIB_ENTRY_FLAG_NONE, |
| [VppMRoutePath(self.pg1.sw_if_index, |
| MRouteItfFlags.MFIB_ITF_FLAG_ACCEPT), |
| VppMRoutePath(self.pg0.sw_if_index, |
| MRouteItfFlags.MFIB_ITF_FLAG_FORWARD)]) |
| route_232_1_1_1.add_vpp_config() |
| |
| pu = (Ether(src=self.pg1.remote_mac, |
| dst=self.pg1.local_mac) / |
| IP(src="10.10.10.10", dst=self.pg0.remote_ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| pm = (Ether(src=self.pg1.remote_mac, |
| dst=self.pg1.local_mac) / |
| IP(src="10.10.10.10", dst="232.1.1.1") / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| # |
| # PG1 does not forward IP traffic |
| # |
| self.send_and_assert_no_replies(self.pg1, pu, "IP disabled") |
| self.send_and_assert_no_replies(self.pg1, pm, "IP disabled") |
| |
| # |
| # IP enable PG1 |
| # |
| self.pg1.config_ip4() |
| |
| # |
| # Now we get packets through |
| # |
| self.pg1.add_stream(pu) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg0.get_capture(1) |
| |
| self.pg1.add_stream(pm) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg0.get_capture(1) |
| |
| # |
| # Disable PG1 |
| # |
| self.pg1.unconfig_ip4() |
| |
| # |
| # PG1 does not forward IP traffic |
| # |
| self.send_and_assert_no_replies(self.pg1, pu, "IP disabled") |
| self.send_and_assert_no_replies(self.pg1, pm, "IP disabled") |
| |
| |
| class TestIPSubNets(VppTestCase): |
| """ IPv4 Subnets """ |
| |
| def setUp(self): |
| super(TestIPSubNets, self).setUp() |
| |
| # create a 2 pg interfaces |
| self.create_pg_interfaces(range(2)) |
| |
| # pg0 we will use to experiemnt |
| self.pg0.admin_up() |
| |
| # pg1 is setup normally |
| self.pg1.admin_up() |
| self.pg1.config_ip4() |
| self.pg1.resolve_arp() |
| |
| def tearDown(self): |
| super(TestIPSubNets, self).tearDown() |
| for i in self.pg_interfaces: |
| i.admin_down() |
| |
| def send_and_assert_no_replies(self, intf, pkts, remark): |
| intf.add_stream(pkts) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| for i in self.pg_interfaces: |
| i.get_capture(0) |
| i.assert_nothing_captured(remark=remark) |
| |
| def test_ip_sub_nets(self): |
| """ IP Sub Nets """ |
| |
| # |
| # Configure a covering route to forward so we know |
| # when we are dropping |
| # |
| cover_route = VppIpRoute(self, "10.0.0.0", 8, |
| [VppRoutePath(self.pg1.remote_ip4, |
| self.pg1.sw_if_index)]) |
| cover_route.add_vpp_config() |
| |
| p = (Ether(src=self.pg1.remote_mac, |
| dst=self.pg1.local_mac) / |
| IP(dst="10.10.10.10", src=self.pg0.local_ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| self.pg1.add_stream(p) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg1.get_capture(1) |
| |
| # |
| # Configure some non-/24 subnets on an IP interface |
| # |
| ip_addr_n = socket.inet_pton(socket.AF_INET, "10.10.10.10") |
| |
| self.vapi.sw_interface_add_del_address(self.pg0.sw_if_index, |
| ip_addr_n, |
| 16) |
| |
| pn = (Ether(src=self.pg1.remote_mac, |
| dst=self.pg1.local_mac) / |
| IP(dst="10.10.0.0", src=self.pg0.local_ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| pb = (Ether(src=self.pg1.remote_mac, |
| dst=self.pg1.local_mac) / |
| IP(dst="10.10.255.255", src=self.pg0.local_ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| self.send_and_assert_no_replies(self.pg1, pn, "IP Network address") |
| self.send_and_assert_no_replies(self.pg1, pb, "IP Broadcast address") |
| |
| # remove the sub-net and we are forwarding via the cover again |
| self.vapi.sw_interface_add_del_address(self.pg0.sw_if_index, |
| ip_addr_n, |
| 16, |
| is_add=0) |
| self.pg1.add_stream(pn) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg1.get_capture(1) |
| self.pg1.add_stream(pb) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg1.get_capture(1) |
| |
| # |
| # A /31 is a special case where the 'other-side' is an attached host |
| # packets to that peer generate ARP requests |
| # |
| ip_addr_n = socket.inet_pton(socket.AF_INET, "10.10.10.10") |
| |
| self.vapi.sw_interface_add_del_address(self.pg0.sw_if_index, |
| ip_addr_n, |
| 31) |
| |
| pn = (Ether(src=self.pg1.remote_mac, |
| dst=self.pg1.local_mac) / |
| IP(dst="10.10.10.11", src=self.pg0.local_ip4) / |
| UDP(sport=1234, dport=1234) / |
| Raw('\xa5' * 100)) |
| |
| self.pg1.add_stream(pn) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg0.get_capture(1) |
| rx[ARP] |
| |
| # remove the sub-net and we are forwarding via the cover again |
| self.vapi.sw_interface_add_del_address(self.pg0.sw_if_index, |
| ip_addr_n, |
| 31, |
| is_add=0) |
| self.pg1.add_stream(pn) |
| self.pg_enable_capture(self.pg_interfaces) |
| self.pg_start() |
| rx = self.pg1.get_capture(1) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(testRunner=VppTestRunner) |