Tests to target holes in adjacency and DPO test coverage

Change-Id: Ic6ac7e441a7b75baa02f03c1585d1ae00903a399
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/test/test_neighbor.py b/test/test_neighbor.py
index 885bf5a4f4b..2ce0a635386 100644
--- a/test/test_neighbor.py
+++ b/test/test_neighbor.py
@@ -5,10 +5,12 @@ from socket import AF_INET, AF_INET6, inet_pton
 
 from framework import VppTestCase, VppTestRunner
 from vpp_neighbor import VppNeighbor, find_nbr
+from vpp_ip_route import VppIpRoute, VppRoutePath
 
 from scapy.packet import Raw
 from scapy.layers.l2 import Ether, ARP
 from scapy.layers.inet import IP, UDP
+from scapy.contrib.mpls import MPLS
 
 # not exported by scapy, so redefined here
 arp_opts = {"who-has": 1, "is-at": 2}
@@ -88,6 +90,18 @@ class ARPTestCase(VppTestCase):
         self.assertEqual(ip.src, sip)
         self.assertEqual(ip.dst, dip)
 
+    def verify_ip_o_mpls(self, rx, smac, dmac, label, sip, dip):
+        ether = rx[Ether]
+        self.assertEqual(ether.dst, dmac)
+        self.assertEqual(ether.src, smac)
+
+        mpls = rx[MPLS]
+        self.assertTrue(mpls.label, label)
+
+        ip = rx[IP]
+        self.assertEqual(ip.src, sip)
+        self.assertEqual(ip.dst, dip)
+
     def send_and_assert_no_replies(self, intf, pkts, remark):
         intf.add_stream(pkts)
         self.pg_enable_capture(self.pg_interfaces)
@@ -430,3 +444,70 @@ class ARPTestCase(VppTestCase):
                                         "ARP req from disable")
         self.send_and_assert_no_replies(self.pg2, arp_req_pg2,
                                         "ARP req from disable")
+
+        #
+        # clean up on interface 2
+        #
+        self.pg2.set_unnumbered(self.pg1.sw_if_index)
+
+    def test_mpls(self):
+        """ MPLS """
+
+        #
+        # Interface 2 does not yet have ip4 config
+        #
+        self.pg2.config_ip4()
+        self.pg2.generate_remote_hosts(2)
+
+        #
+        # Add a reoute with out going label via an ARP unresolved next-hop
+        #
+        ip_10_0_0_1 = VppIpRoute(self, "10.0.0.1", 32,
+                                 [VppRoutePath(self.pg2.remote_hosts[1].ip4,
+                                               self.pg2.sw_if_index,
+                                               labels=[55])])
+        ip_10_0_0_1.add_vpp_config()
+
+        #
+        # packets should generate an ARP request
+        #
+        p = (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)
+        self.pg_enable_capture(self.pg_interfaces)
+        self.pg_start()
+
+        rx = self.pg2.get_capture(1)
+        self.verify_arp_req(rx[0],
+                            self.pg2.local_mac,
+                            self.pg2.local_ip4,
+                            self.pg2._remote_hosts[1].ip4)
+
+        #
+        # now resolve the neighbours
+        #
+        self.pg2.configure_ipv4_neighbors()
+
+        #
+        # Now packet should be properly MPLS encapped.
+        #  This verifies that MPLS link-type adjacencies are completed
+        #  when the ARP entry resolves
+        #
+        self.pg0.add_stream(p)
+        self.pg_enable_capture(self.pg_interfaces)
+        self.pg_start()
+
+        rx = self.pg2.get_capture(1)
+        self.verify_ip_o_mpls(rx[0],
+                              self.pg2.local_mac,
+                              self.pg2.remote_hosts[1].mac,
+                              55,
+                              self.pg0.remote_ip4,
+                              "10.0.0.1")
+
+if __name__ == '__main__':
+    unittest.main(testRunner=VppTestRunner)