fib: fix crash while adding intf-rx routes

Fix crash while adding intf-rx ip4 and ip6 routes via api due
invalid exporting of interface rx routes as attached.
Also, add missed route path via rx-ip6 cli support.

Type: fix
Signed-off-by: Vladislav Grishenko <themiron@yandex-team.ru>
Change-Id: I15711c8c0787398dd7e3baa4787019bb1f317666

1 files changed, 133 insertions, 0 deletions

diff --git a/test/test_ip6.py b/test/test_ip6.py
index 1e846a66c5a..87509f3f8e1 100644
--- a/test/test_ip6.py
+++ b/test/test_ip6.py
@@ -4087,5 +4087,138 @@ class TestIPv6Punt(VppTestCase):
         self.assertEqual(str(punts[2].punt.nh), "::")
 
 
+class TestIP6InterfaceRx(VppTestCase):
+    """IPv6 Interface Receive"""
+
+    @classmethod
+    def setUpClass(cls):
+        super(TestIP6InterfaceRx, cls).setUpClass()
+
+    @classmethod
+    def tearDownClass(cls):
+        super(TestIP6InterfaceRx, cls).tearDownClass()
+
+    def setUp(self):
+        super(TestIP6InterfaceRx, self).setUp()
+
+        self.create_pg_interfaces(range(3))
+
+        table_id = 0
+
+        for i in self.pg_interfaces:
+            i.admin_up()
+
+            if table_id != 0:
+                table = VppIpTable(self, table_id, is_ip6=1)
+                table.add_vpp_config()
+
+            i.set_table_ip6(table_id)
+            i.config_ip6()
+            i.resolve_ndp()
+            table_id += 1
+
+    def tearDown(self):
+        for i in self.pg_interfaces:
+            i.unconfig_ip6()
+            i.admin_down()
+            i.set_table_ip6(0)
+
+        super(TestIP6InterfaceRx, self).tearDown()
+
+    def test_interface_rx(self):
+        """IPv6 Interface Receive"""
+
+        #
+        # add a route in the default table to receive ...
+        #
+        route_to_dst = VppIpRoute(
+            self,
+            "1::",
+            122,
+            [
+                VppRoutePath(
+                    "::",
+                    self.pg1.sw_if_index,
+                    type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX,
+                )
+            ],
+        )
+        route_to_dst.add_vpp_config()
+
+        #
+        # packets to these destination are dropped, since they'll
+        # hit the respective default routes in table 1
+        #
+        p_dst = (
+            Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
+            / IPv6(src="5::5", dst="1::1")
+            / inet6.TCP(sport=1234, dport=1234)
+            / Raw(b"\xa5" * 100)
+        )
+        pkts_dst = p_dst * 10
+
+        self.send_and_assert_no_replies(self.pg0, pkts_dst, "IP in table 1")
+
+        #
+        # add a route in the dst table to forward via pg1
+        #
+        route_in_dst = VppIpRoute(
+            self,
+            "1::1",
+            128,
+            [VppRoutePath(self.pg1.remote_ip6, 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 default table to receive ...
+        #
+        route_to_dst = VppIpRoute(
+            self,
+            "1::",
+            122,
+            [
+                VppRoutePath(
+                    "::",
+                    self.pg2.sw_if_index,
+                    type=FibPathType.FIB_PATH_TYPE_INTERFACE_RX,
+                )
+            ],
+            table_id=1,
+        )
+        route_to_dst.add_vpp_config()
+
+        #
+        # packets to these destination are dropped, since they'll
+        # hit the respective default routes in table 2
+        #
+        p_dst = (
+            Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac)
+            / IPv6(src="6::6", dst="1::2")
+            / inet6.TCP(sport=1234, dport=1234)
+            / Raw(b"\xa5" * 100)
+        )
+        pkts_dst = p_dst * 10
+
+        self.send_and_assert_no_replies(self.pg0, pkts_dst, "IP in table 2")
+
+        #
+        # add a route in the table 2 to forward via pg2
+        #
+        route_in_dst = VppIpRoute(
+            self,
+            "1::2",
+            128,
+            [VppRoutePath(self.pg2.remote_ip6, self.pg2.sw_if_index)],
+            table_id=2,
+        )
+        route_in_dst.add_vpp_config()
+
+        self.send_and_expect(self.pg0, pkts_dst, self.pg2)
+
+
 if __name__ == "__main__":
     unittest.main(testRunner=VppTestRunner)