#!/usr/bin/env python
import unittest
-from logging import *
-
-from framework import VppTestCase, VppTestRunner
-from vpp_sub_interface import VppDot1QSubint
-from vpp_gre_interface import VppGreInterface, VppGre6Interface
-from vpp_ip import DpoProto
-from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable
-from vpp_papi_provider import L2_VTR_OP
from scapy.packet import Raw
from scapy.layers.l2 import Ether, Dot1Q, GRE
from scapy.layers.inet6 import IPv6
from scapy.volatile import RandMAC, RandIP
+from framework import VppTestCase, VppTestRunner
+from vpp_sub_interface import VppDot1QSubint
+from vpp_gre_interface import VppGreInterface, VppGre6Interface
+from vpp_ip import DpoProto
+from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable
+from vpp_papi_provider import L2_VTR_OP
from util import ppp, ppc
# which is a drop.
#
tx = self.create_stream_ip4(self.pg0, "5.5.5.5", "4.4.4.4")
- self.pg0.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- self.pg0.assert_nothing_captured(
- remark="GRE packets forwarded without DIP resolved")
+ self.send_and_assert_no_replies(self.pg0, tx)
#
# Add a route that resolves the tunnel's destination
# Send a packet stream that is routed into the tunnel
# - packets are GRE encapped
#
- self.vapi.cli("clear trace")
tx = self.create_stream_ip4(self.pg0, "5.5.5.5", "4.4.4.4")
- self.pg0.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- rx = self.pg0.get_capture(len(tx))
+ rx = self.send_and_expect(self.pg0, tx, self.pg0)
self.verify_tunneled_4o4(self.pg0, rx, tx,
self.pg0.local_ip4, "1.1.1.2")
# Send tunneled packets that match the created tunnel and
# are decapped and forwarded
#
- self.vapi.cli("clear trace")
tx = self.create_tunnel_stream_4o4(self.pg0,
"1.1.1.2",
self.pg0.local_ip4,
self.pg0.local_ip4,
self.pg0.remote_ip4)
- self.pg0.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- rx = self.pg0.get_capture(len(tx))
+ rx = self.send_and_expect(self.pg0, tx, self.pg0)
self.verify_decapped_4o4(self.pg0, rx, tx)
#
self.pg0.local_ip4,
self.pg0.local_ip4,
self.pg0.remote_ip4)
- self.pg0.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- self.pg0.assert_nothing_captured(
+ self.send_and_assert_no_replies(
+ self.pg0, tx,
remark="GRE packets forwarded despite no SRC address match")
#
# Send IPv6 tunnel encapslated packets
# - dropped since IPv6 is not enabled on the tunnel
#
- self.vapi.cli("clear trace")
tx = self.create_tunnel_stream_6o4(self.pg0,
"1.1.1.2",
self.pg0.local_ip4,
self.pg0.local_ip6,
self.pg0.remote_ip6)
- self.pg0.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- self.pg0.assert_nothing_captured(remark="IPv6 GRE packets forwarded "
- "despite IPv6 not enabled on tunnel")
+ self.send_and_assert_no_replies(self.pg0, tx,
+ "IPv6 GRE packets forwarded "
+ "despite IPv6 not enabled on tunnel")
#
# Enable IPv6 on the tunnel
# Send IPv6 tunnel encapslated packets
# - forwarded since IPv6 is enabled on the tunnel
#
- self.vapi.cli("clear trace")
tx = self.create_tunnel_stream_6o4(self.pg0,
"1.1.1.2",
self.pg0.local_ip4,
self.pg0.local_ip6,
self.pg0.remote_ip6)
- self.pg0.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- rx = self.pg0.get_capture(len(tx))
+ rx = self.send_and_expect(self.pg0, tx, self.pg0)
self.verify_decapped_6o4(self.pg0, rx, tx)
#
# which is a drop.
#
tx = self.create_stream_ip6(self.pg2, "5005::1", "4004::1")
- self.pg2.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- self.pg2.assert_nothing_captured(
- remark="GRE packets forwarded without DIP resolved")
+ self.send_and_assert_no_replies(
+ self.pg2, tx,
+ "GRE packets forwarded without DIP resolved")
#
# Add a route that resolves the tunnel's destination
# Send a packet stream that is routed into the tunnel
# - packets are GRE encapped
#
- self.vapi.cli("clear trace")
tx = self.create_stream_ip6(self.pg2, "5005::1", "4004::1")
- self.pg2.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- rx = self.pg2.get_capture(len(tx))
+ rx = self.send_and_expect(self.pg2, tx, self.pg2)
self.verify_tunneled_6o6(self.pg2, rx, tx,
self.pg2.local_ip6, "1002::1")
self.pg2.local_ip6,
"2001::1",
self.pg1.remote_ip6)
- self.vapi.cli("clear trace")
- self.pg2.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
- rx = self.pg1.get_capture(len(tx))
+ rx = self.send_and_expect(self.pg2, tx, self.pg1)
#
# RX'd packet is UDP over IPv6, test the GRE header is gone.
#
self.vapi.cli("clear trace")
tx = self.create_stream_ip4(self.pg0, "5.5.5.5", "9.9.9.9")
- self.pg0.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- rx = self.pg1.get_capture(len(tx))
+ rx = self.send_and_expect(self.pg0, tx, self.pg1)
self.verify_tunneled_4o4(self.pg1, rx, tx,
self.pg1.local_ip4, "2.2.2.2")
self.pg1.local_ip4,
self.pg0.local_ip4,
self.pg0.remote_ip4)
- self.pg1.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- rx = self.pg0.get_capture(len(tx))
+ rx = self.send_and_expect(self.pg1, tx, self.pg0)
self.verify_decapped_4o4(self.pg0, rx, tx)
#
self.pg1.local_ip4,
self.pg0.local_ip4,
self.pg0.remote_ip4)
- self.pg2.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- self.pg0.assert_nothing_captured(
- remark="GRE decap packets in wrong VRF")
+ rx = self.send_and_assert_no_replies(
+ self.pg2, tx,
+ "GRE decap packets in wrong VRF")
self.pg2.unconfig_ip4()
# Send in tunnel encapped L2. expect out tunnel encapped L2
# in both directions
#
- self.vapi.cli("clear trace")
tx = self.create_tunnel_stream_l2o4(self.pg0,
"2.2.2.2",
self.pg0.local_ip4)
- self.pg0.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- rx = self.pg0.get_capture(len(tx))
+ rx = self.send_and_expect(self.pg0, tx, self.pg0)
self.verify_tunneled_l2o4(self.pg0, rx, tx,
self.pg0.local_ip4,
"2.2.2.3")
- self.vapi.cli("clear trace")
tx = self.create_tunnel_stream_l2o4(self.pg0,
"2.2.2.3",
self.pg0.local_ip4)
- self.pg0.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- rx = self.pg0.get_capture(len(tx))
+ rx = self.send_and_expect(self.pg0, tx, self.pg0)
self.verify_tunneled_l2o4(self.pg0, rx, tx,
self.pg0.local_ip4,
"2.2.2.2")
# Configure both to pop thier respective VLAN tags,
# so that during the x-coonect they will subsequently push
#
- self.vapi.sw_interface_set_l2_tag_rewrite(gre_if_12.sw_if_index,
- L2_VTR_OP.L2_POP_1,
- 12)
- self.vapi.sw_interface_set_l2_tag_rewrite(gre_if_11.sw_if_index,
- L2_VTR_OP.L2_POP_1,
- 11)
+ self.vapi.l2_interface_vlan_tag_rewrite(gre_if_12.sw_if_index,
+ L2_VTR_OP.L2_POP_1,
+ 12)
+ self.vapi.l2_interface_vlan_tag_rewrite(gre_if_11.sw_if_index,
+ L2_VTR_OP.L2_POP_1,
+ 11)
#
# Send traffic in both directiond - expect the VLAN tags to
# be swapped.
#
- self.vapi.cli("clear trace")
tx = self.create_tunnel_stream_vlano4(self.pg0,
"2.2.2.2",
self.pg0.local_ip4,
11)
- self.pg0.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- rx = self.pg0.get_capture(len(tx))
+ rx = self.send_and_expect(self.pg0, tx, self.pg0)
self.verify_tunneled_vlano4(self.pg0, rx, tx,
self.pg0.local_ip4,
"2.2.2.3",
12)
- self.vapi.cli("clear trace")
tx = self.create_tunnel_stream_vlano4(self.pg0,
"2.2.2.3",
self.pg0.local_ip4,
12)
- self.pg0.add_stream(tx)
-
- self.pg_enable_capture(self.pg_interfaces)
- self.pg_start()
-
- rx = self.pg0.get_capture(len(tx))
+ rx = self.send_and_expect(self.pg0, tx, self.pg0)
self.verify_tunneled_vlano4(self.pg0, rx, tx,
self.pg0.local_ip4,
"2.2.2.2",
route_tun1_dst.add_vpp_config()
route_tun2_dst.add_vpp_config()
+ def test_gre_loop(self):
+ """ GRE tunnel loop Tests """
+
+ #
+ # Create an L3 GRE tunnel.
+ # - set it admin up
+ # - assign an IP Addres
+ #
+ gre_if = VppGreInterface(self,
+ self.pg0.local_ip4,
+ "1.1.1.2")
+ gre_if.add_vpp_config()
+ gre_if.admin_up()
+ gre_if.config_ip4()
+
+ #
+ # add a route to the tunnel's destination that points
+ # through the tunnel, hence forming a loop in the forwarding
+ # graph
+ #
+ route_dst = VppIpRoute(self, "1.1.1.2", 32,
+ [VppRoutePath("0.0.0.0",
+ gre_if.sw_if_index)])
+ route_dst.add_vpp_config()
+
+ #
+ # packets to the tunnels destination should be dropped
+ #
+ tx = self.create_stream_ip4(self.pg0, "1.1.1.1", "1.1.1.2")
+ self.send_and_assert_no_replies(self.pg2, tx)
+
+ self.logger.info(self.vapi.ppcli("sh adj 7"))
+
+ #
+ # break the loop
+ #
+ route_dst.modify([VppRoutePath(self.pg1.remote_ip4,
+ self.pg1.sw_if_index)])
+ route_dst.add_vpp_config()
+
+ rx = self.send_and_expect(self.pg0, tx, self.pg1)
+
+ #
+ # a good route throught the tunnel to check it restacked
+ #
+ route_via_tun_2 = VppIpRoute(self, "2.2.2.2", 32,
+ [VppRoutePath("0.0.0.0",
+ gre_if.sw_if_index)])
+ route_via_tun_2.add_vpp_config()
+
+ tx = self.create_stream_ip4(self.pg0, "2.2.2.3", "2.2.2.2")
+ rx = self.send_and_expect(self.pg0, tx, self.pg1)
+ self.verify_tunneled_4o4(self.pg1, rx, tx,
+ self.pg0.local_ip4, "1.1.1.2")
+
+ #
+ # cleanup
+ #
+ route_via_tun_2.remove_vpp_config()
+ gre_if.remove_vpp_config()
+
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
Code Review / vpp.git / blobdiff