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-rw-r--r--src/plugins/unittest/fib_test.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/src/plugins/unittest/fib_test.c b/src/plugins/unittest/fib_test.c
index e26cc674a88..fada2f81f52 100644
--- a/src/plugins/unittest/fib_test.c
+++ b/src/plugins/unittest/fib_test.c
@@ -4195,6 +4195,81 @@ fib_test_v4 (void)
dpo_reset(&dvr_dpo);
/*
+ * add the default route via a next-hop that will form a loop
+ */
+ fib_prefix_t pfx_conn = {
+ .fp_len = 24,
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_addr = {
+ /* 30.30.30.30 */
+ .ip4.as_u32 = clib_host_to_net_u32(0x1e1e1e1e),
+ },
+ };
+
+ dfrt = fib_table_entry_path_add(fib_index,
+ &pfx_0_0_0_0_s_0,
+ FIB_SOURCE_API,
+ FIB_ENTRY_FLAG_NONE,
+ DPO_PROTO_IP4,
+ &pfx_conn.fp_addr,
+ ~0,
+ fib_index,
+ 1,
+ NULL,
+ FIB_ROUTE_PATH_FLAG_NONE);
+ /*
+ * the default route is a drop, since it's looped
+ */
+ FIB_TEST(load_balance_is_drop(fib_entry_contribute_ip_forwarding(dfrt)),
+ "Default route is DROP");
+
+ /*
+ * add a connected cover for the next-hop, this breaks the recursion loop
+ * for the default route
+ */
+ fib_table_entry_path_add(fib_index,
+ &pfx_conn,
+ FIB_SOURCE_API,
+ (FIB_ENTRY_FLAG_CONNECTED |
+ FIB_ENTRY_FLAG_ATTACHED),
+ DPO_PROTO_IP4,
+ NULL,
+ tm->hw[0]->sw_if_index,
+ ~0,
+ 1,
+ NULL,
+ FIB_ROUTE_PATH_FLAG_NONE);
+ pfx_conn.fp_len = 32;
+ fei = fib_table_lookup_exact_match(fib_index, &pfx_conn);
+
+ u32 ai_30 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+ VNET_LINK_IP4,
+ &pfx_conn.fp_addr,
+ tm->hw[0]->sw_if_index);
+
+ fib_test_lb_bucket_t ip_o_30_30_30_30 = {
+ .type = FT_LB_ADJ,
+ .adj = {
+ .adj = ai_30,
+ },
+ };
+ FIB_TEST(!fib_test_validate_entry(fei,
+ FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+ 1,
+ &ip_o_30_30_30_30),
+ "30.30.30.30 via adj");
+ FIB_TEST_REC_FORW(&pfx_0_0_0_0_s_0, &pfx_conn, 0);
+
+ pfx_conn.fp_len = 24;
+ fib_table_entry_delete(fib_index,
+ &pfx_conn,
+ FIB_SOURCE_API);
+ fib_table_entry_delete(fib_index,
+ &pfx_0_0_0_0_s_0,
+ FIB_SOURCE_API);
+ adj_unlock(ai_30);
+
+ /*
* CLEANUP
* remove adj-fibs:
*/