from framework import VppTestCase, VppTestRunner
from vpp_sub_interface import VppSubInterface, VppDot1QSubint, VppDot1ADSubint
+from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpMRoute, \
+ VppMRoutePath, MRouteItfFlags, MRouteEntryFlags, VppMplsIpBind, \
+ VppMplsTable, VppIpTable
from scapy.packet import Raw
-from scapy.layers.l2 import Ether, Dot1Q
-from scapy.layers.inet import IP, UDP
+from scapy.layers.l2 import Ether, Dot1Q, ARP
+from scapy.layers.inet import IP, UDP, TCP, ICMP, icmptypes, icmpcodes
from util import ppp
+from scapy.contrib.mpls import MPLS
class TestIPv4(VppTestCase):
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 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 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)
+
+
+class TestIPLoadBalance(VppTestCase):
+ """ IPv4 Load-Balancing """
+
+ def setUp(self):
+ super(TestIPLoadBalance, self).setUp()
+
+ self.create_pg_interfaces(range(5))
+ mpls_tbl = VppMplsTable(self, 0)
+ mpls_tbl.add_vpp_config()
+
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+ i.enable_mpls()
+
+ def tearDown(self):
+ for i in self.pg_interfaces:
+ i.disable_mpls()
+ i.unconfig_ip4()
+ i.admin_down()
+ super(TestIPLoadBalance, self).tearDown()
+
+ def send_and_expect_load_balancing(self, input, pkts, outputs):
+ input.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ for oo in outputs:
+ rx = oo._get_capture(1)
+ self.assertNotEqual(0, len(rx))
+
+ def send_and_expect_one_itf(self, input, pkts, itf):
+ input.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+ rx = itf.get_capture(len(pkts))
+
+ def test_ip_load_balance(self):
+ """ IP Load-Balancing """
+
+ #
+ # An array of packets that differ only in the destination port
+ #
+ port_ip_pkts = []
+ port_mpls_pkts = []
+
+ #
+ # An array of packets that differ only in the source address
+ #
+ src_ip_pkts = []
+ src_mpls_pkts = []
+
+ for ii in range(65):
+ port_ip_hdr = (IP(dst="10.0.0.1", src="20.0.0.1") /
+ UDP(sport=1234, dport=1234 + ii) /
+ Raw('\xa5' * 100))
+ port_ip_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ port_ip_hdr))
+ port_mpls_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ MPLS(label=66, ttl=2) /
+ port_ip_hdr))
+
+ src_ip_hdr = (IP(dst="10.0.0.1", src="20.0.0.%d" % ii) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100))
+ src_ip_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ src_ip_hdr))
+ src_mpls_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ MPLS(label=66, ttl=2) /
+ src_ip_hdr))
+
+ route_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
+ [VppRoutePath(self.pg1.remote_ip4,
+ self.pg1.sw_if_index),
+ VppRoutePath(self.pg2.remote_ip4,
+ self.pg2.sw_if_index)])
+ route_10_0_0_1.add_vpp_config()
+
+ binding = VppMplsIpBind(self, 66, "10.0.0.1", 32)
+ binding.add_vpp_config()
+
+ #
+ # inject the packet on pg0 - expect load-balancing across the 2 paths
+ # - since the default hash config is to use IP src,dst and port
+ # src,dst
+ # We are not going to ensure equal amounts of packets across each link,
+ # since the hash algorithm is statistical and therefore this can never
+ # be guaranteed. But wuth 64 different packets we do expect some
+ # balancing. So instead just ensure there is traffic on each link.
+ #
+ self.send_and_expect_load_balancing(self.pg0, port_ip_pkts,
+ [self.pg1, self.pg2])
+ self.send_and_expect_load_balancing(self.pg0, src_ip_pkts,
+ [self.pg1, self.pg2])
+ self.send_and_expect_load_balancing(self.pg0, port_mpls_pkts,
+ [self.pg1, self.pg2])
+ self.send_and_expect_load_balancing(self.pg0, src_mpls_pkts,
+ [self.pg1, self.pg2])
+
+ #
+ # change the flow hash config so it's only IP src,dst
+ # - now only the stream with differing source address will
+ # load-balance
+ #
+ self.vapi.set_ip_flow_hash(0, src=1, dst=1, sport=0, dport=0)
+
+ self.send_and_expect_load_balancing(self.pg0, src_ip_pkts,
+ [self.pg1, self.pg2])
+ self.send_and_expect_load_balancing(self.pg0, src_mpls_pkts,
+ [self.pg1, self.pg2])
+
+ self.send_and_expect_one_itf(self.pg0, port_ip_pkts, self.pg2)
+
+ #
+ # change the flow hash config back to defaults
+ #
+ self.vapi.set_ip_flow_hash(0, src=1, dst=1, sport=1, dport=1)
+
+ #
+ # Recursive prefixes
+ # - testing that 2 stages of load-balancing occurs and there is no
+ # polarisation (i.e. only 2 of 4 paths are used)
+ #
+ port_pkts = []
+ src_pkts = []
+
+ for ii in range(257):
+ port_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(dst="1.1.1.1", src="20.0.0.1") /
+ UDP(sport=1234, dport=1234 + ii) /
+ Raw('\xa5' * 100)))
+ src_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(dst="1.1.1.1", src="20.0.0.%d" % ii) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100)))
+
+ route_10_0_0_2 = VppIpRoute(self, "10.0.0.2", 32,
+ [VppRoutePath(self.pg3.remote_ip4,
+ self.pg3.sw_if_index),
+ VppRoutePath(self.pg4.remote_ip4,
+ self.pg4.sw_if_index)])
+ route_10_0_0_2.add_vpp_config()
+
+ route_1_1_1_1 = VppIpRoute(self, "1.1.1.1", 32,
+ [VppRoutePath("10.0.0.2", 0xffffffff),
+ VppRoutePath("10.0.0.1", 0xffffffff)])
+ route_1_1_1_1.add_vpp_config()
+
+ #
+ # inject the packet on pg0 - expect load-balancing across all 4 paths
+ #
+ self.vapi.cli("clear trace")
+ self.send_and_expect_load_balancing(self.pg0, port_pkts,
+ [self.pg1, self.pg2,
+ self.pg3, self.pg4])
+ self.send_and_expect_load_balancing(self.pg0, src_pkts,
+ [self.pg1, self.pg2,
+ self.pg3, self.pg4])
+
+ #
+ # Recursive prefixes
+ # - testing that 2 stages of load-balancing, no choices
+ #
+ port_pkts = []
+
+ for ii in range(257):
+ port_pkts.append((Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(dst="1.1.1.2", src="20.0.0.2") /
+ UDP(sport=1234, dport=1234 + ii) /
+ Raw('\xa5' * 100)))
+
+ route_10_0_0_3 = VppIpRoute(self, "10.0.0.3", 32,
+ [VppRoutePath(self.pg3.remote_ip4,
+ self.pg3.sw_if_index)])
+ route_10_0_0_3.add_vpp_config()
+
+ route_1_1_1_2 = VppIpRoute(self, "1.1.1.2", 32,
+ [VppRoutePath("10.0.0.3", 0xffffffff)])
+ route_1_1_1_2.add_vpp_config()
+
+ #
+ # inject the packet on pg0 - expect load-balancing across all 4 paths
+ #
+ self.vapi.cli("clear trace")
+ self.send_and_expect_one_itf(self.pg0, port_pkts, self.pg3)
+
+
+class TestIPVlan0(VppTestCase):
+ """ IPv4 VLAN-0 """
+
+ def setUp(self):
+ super(TestIPVlan0, self).setUp()
+
+ self.create_pg_interfaces(range(2))
+ mpls_tbl = VppMplsTable(self, 0)
+ mpls_tbl.add_vpp_config()
+
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+ i.enable_mpls()
+
+ def tearDown(self):
+ for i in self.pg_interfaces:
+ i.disable_mpls()
+ i.unconfig_ip4()
+ i.admin_down()
+ super(TestIPVlan0, self).tearDown()
+
+ def test_ip_vlan_0(self):
+ """ IP VLAN-0 """
+
+ pkts = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ Dot1Q(vlan=0) /
+ IP(dst=self.pg1.remote_ip4,
+ src=self.pg0.remote_ip4) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100)) * 65
+
+ #
+ # Expect that packets sent on VLAN-0 are forwarded on the
+ # main interface.
+ #
+ self.send_and_expect(self.pg0, pkts, self.pg1)
+
+
+class TestIPPunt(VppTestCase):
+ """ IPv4 Punt Police/Redirect """
+
+ def setUp(self):
+ super(TestIPPunt, self).setUp()
+
+ self.create_pg_interfaces(range(2))
+
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ def tearDown(self):
+ super(TestIPPunt, self).tearDown()
+ for i in self.pg_interfaces:
+ i.unconfig_ip4()
+ i.admin_down()
+
+ def test_ip_punt(self):
+ """ IP punt police and redirect """
+
+ p = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
+ TCP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100))
+
+ pkts = p * 1025
+
+ #
+ # Configure a punt redirect via pg1.
+ #
+ nh_addr = socket.inet_pton(socket.AF_INET,
+ self.pg1.remote_ip4)
+ self.vapi.ip_punt_redirect(self.pg0.sw_if_index,
+ self.pg1.sw_if_index,
+ nh_addr)
+
+ self.send_and_expect(self.pg0, pkts, self.pg1)
+
+ #
+ # add a policer
+ #
+ policer = self.vapi.policer_add_del("ip4-punt", 400, 0, 10, 0,
+ rate_type=1)
+ self.vapi.ip_punt_police(policer.policer_index)
+
+ self.vapi.cli("clear trace")
+ self.pg0.add_stream(pkts)
+ self.pg_enable_capture(self.pg_interfaces)
+ self.pg_start()
+
+ #
+ # the number of packet recieved should be greater than 0,
+ # but not equal to the number sent, since some were policed
+ #
+ rx = self.pg1._get_capture(1)
+ self.assertTrue(len(rx) > 0)
+ self.assertTrue(len(rx) < len(pkts))
+
+ #
+ # remove the poilcer. back to full rx
+ #
+ self.vapi.ip_punt_police(policer.policer_index, is_add=0)
+ self.vapi.policer_add_del("ip4-punt", 400, 0, 10, 0,
+ rate_type=1, is_add=0)
+ self.send_and_expect(self.pg0, pkts, self.pg1)
+
+ #
+ # remove the redirect. expect full drop.
+ #
+ self.vapi.ip_punt_redirect(self.pg0.sw_if_index,
+ self.pg1.sw_if_index,
+ nh_addr,
+ is_add=0)
+ self.send_and_assert_no_replies(self.pg0, pkts,
+ "IP no punt config")
+
+ #
+ # Add a redirect that is not input port selective
+ #
+ self.vapi.ip_punt_redirect(0xffffffff,
+ self.pg1.sw_if_index,
+ nh_addr)
+ self.send_and_expect(self.pg0, pkts, self.pg1)
+
+ self.vapi.ip_punt_redirect(0xffffffff,
+ self.pg1.sw_if_index,
+ nh_addr,
+ is_add=0)
+
+
+class TestIPDeag(VppTestCase):
+ """ IPv4 Deaggregate Routes """
+
+ def setUp(self):
+ super(TestIPDeag, self).setUp()
+
+ self.create_pg_interfaces(range(3))
+
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ def tearDown(self):
+ super(TestIPDeag, self).tearDown()
+ for i in self.pg_interfaces:
+ i.unconfig_ip4()
+ i.admin_down()
+
+ def test_ip_deag(self):
+ """ IP Deag Routes """
+
+ #
+ # Create a table to be used for:
+ # 1 - another destination address lookup
+ # 2 - a source address lookup
+ #
+ table_dst = VppIpTable(self, 1)
+ table_src = VppIpTable(self, 2)
+ table_dst.add_vpp_config()
+ table_src.add_vpp_config()
+
+ #
+ # Add a route in the default table to point to a deag/
+ # second lookup in each of these tables
+ #
+ route_to_dst = VppIpRoute(self, "1.1.1.1", 32,
+ [VppRoutePath("0.0.0.0",
+ 0xffffffff,
+ nh_table_id=1)])
+ route_to_src = VppIpRoute(self, "1.1.1.2", 32,
+ [VppRoutePath("0.0.0.0",
+ 0xffffffff,
+ nh_table_id=2,
+ is_source_lookup=1)])
+ route_to_dst.add_vpp_config()
+ route_to_src.add_vpp_config()
+
+ #
+ # packets to these destination are dropped, since they'll
+ # hit the respective default routes in the second table
+ #
+ p_dst = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(src="5.5.5.5", dst="1.1.1.1") /
+ TCP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100))
+ p_src = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(src="2.2.2.2", dst="1.1.1.2") /
+ TCP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100))
+ pkts_dst = p_dst * 257
+ pkts_src = p_src * 257
+
+ self.send_and_assert_no_replies(self.pg0, pkts_dst,
+ "IP in dst table")
+ self.send_and_assert_no_replies(self.pg0, pkts_src,
+ "IP in src table")
+
+ #
+ # add a route in the dst table to forward via pg1
+ #
+ route_in_dst = VppIpRoute(self, "1.1.1.1", 32,
+ [VppRoutePath(self.pg1.remote_ip4,
+ self.pg1.sw_if_index)],
+ table_id=1)
+ route_in_dst.add_vpp_config()
+ self.send_and_expect(self.pg0, pkts_dst, self.pg1)
+
+ #
+ # add a route in the src table to forward via pg2
+ #
+ route_in_src = VppIpRoute(self, "2.2.2.2", 32,
+ [VppRoutePath(self.pg2.remote_ip4,
+ self.pg2.sw_if_index)],
+ table_id=2)
+ route_in_src.add_vpp_config()
+ self.send_and_expect(self.pg0, pkts_src, self.pg2)
+
+
+class TestIPInput(VppTestCase):
+ """ IPv4 Input Exceptions """
+
+ def setUp(self):
+ super(TestIPInput, self).setUp()
+
+ self.create_pg_interfaces(range(2))
+
+ for i in self.pg_interfaces:
+ i.admin_up()
+ i.config_ip4()
+ i.resolve_arp()
+
+ def tearDown(self):
+ super(TestIPInput, self).tearDown()
+ for i in self.pg_interfaces:
+ i.unconfig_ip4()
+ i.admin_down()
+
+ def test_ip_input(self):
+ """ IP Input Exceptions """
+
+ # i can't find a way in scapy to construct an IP packet
+ # with a length less than the IP header length
+
+ #
+ # Packet too short - this is forwarded
+ #
+ p_short = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4,
+ dst=self.pg1.remote_ip4,
+ len=40) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100))
+
+ rx = self.send_and_expect(self.pg0, p_short * 65, self.pg1)
+
+ #
+ # Packet too long - this is dropped
+ #
+ p_long = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4,
+ dst=self.pg1.remote_ip4,
+ len=400) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100))
+
+ rx = self.send_and_assert_no_replies(self.pg0, p_long * 65,
+ "too long")
+
+ #
+ # bad chksum - this is dropped
+ #
+ p_chksum = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4,
+ dst=self.pg1.remote_ip4,
+ chksum=400) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100))
+
+ rx = self.send_and_assert_no_replies(self.pg0, p_chksum * 65,
+ "bad checksum")
+
+ #
+ # bad version - this is dropped
+ #
+ p_ver = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4,
+ dst=self.pg1.remote_ip4,
+ version=3) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100))
+
+ rx = self.send_and_assert_no_replies(self.pg0, p_ver * 65,
+ "funky version")
+
+ #
+ # fragment offset 1 - this is dropped
+ #
+ p_frag = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4,
+ dst=self.pg1.remote_ip4,
+ frag=1) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100))
+
+ rx = self.send_and_assert_no_replies(self.pg0, p_frag * 65,
+ "frag offset")
+
+ #
+ # TTL expired packet
+ #
+ p_ttl = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4,
+ dst=self.pg1.remote_ip4,
+ ttl=1) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 100))
+
+ rx = self.send_and_expect(self.pg0, p_ttl * 65, self.pg0)
+
+ rx = rx[0]
+ icmp = rx[ICMP]
+
+ self.assertEqual(icmptypes[icmp.type], "time-exceeded")
+ self.assertEqual(icmpcodes[icmp.type][icmp.code],
+ "ttl-zero-during-transit")
+ self.assertEqual(icmp.src, self.pg0.remote_ip4)
+ self.assertEqual(icmp.dst, self.pg1.remote_ip4)
+
+ #
+ # MTU exceeded
+ #
+ p_mtu = (Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac) /
+ IP(src=self.pg0.remote_ip4,
+ dst=self.pg1.remote_ip4,
+ ttl=10) /
+ UDP(sport=1234, dport=1234) /
+ Raw('\xa5' * 2000))
+
+ self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, 1500)
+
+ rx = self.send_and_expect(self.pg0, p_mtu * 65, self.pg0)
+ rx = rx[0]
+ icmp = rx[ICMP]
+
+ self.assertEqual(icmptypes[icmp.type], "dest-unreach")
+ self.assertEqual(icmpcodes[icmp.type][icmp.code],
+ "fragmentation-needed")
+ self.assertEqual(icmp.src, self.pg0.remote_ip4)
+ self.assertEqual(icmp.dst, self.pg1.remote_ip4)
+
+ self.vapi.sw_interface_set_mtu(self.pg1.sw_if_index, 2500)
+ rx = self.send_and_expect(self.pg0, p_mtu * 65, self.pg1)
+
+
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / blobdiff