+ dpo_reset(&interposer);
+ fib_table_entry_delete(0, &pfx_11_11_11_11_s_32, FIB_SOURCE_API);
+
+ /*
+ * add an interposer to a source with path-extensions
+ */
+ fib_mpls_label_t *l3300 = NULL, fml_3300 = {
+ .fml_value = 3300,
+ };
+ vec_add1(l3300, fml_3300);
+ fib_table_entry_update_one_path(0,
+ &pfx_11_11_11_11_s_32,
+ FIB_SOURCE_API,
+ FIB_ENTRY_FLAG_NONE,
+ DPO_PROTO_IP4,
+ &nh_10_10_10_3,
+ tm->hw[0]->sw_if_index,
+ ~0,
+ 1,
+ l3300,
+ FIB_ROUTE_PATH_FLAG_NONE);
+
+ mpls_label_dpo_create(l99,
+ MPLS_EOS,
+ DPO_PROTO_IP4,
+ MPLS_LABEL_DPO_FLAG_NONE,
+ punt_dpo_get(DPO_PROTO_MPLS),
+ &interposer);
+
+ adj_index_t ai_mpls_10_10_10_3 = adj_nbr_add_or_lock(FIB_PROTOCOL_IP4,
+ VNET_LINK_MPLS,
+ &nh_10_10_10_3,
+ tm->hw[0]->sw_if_index);
+ fib_test_lb_bucket_t l3300_o_10_10_10_3 = {
+ .type = FT_LB_LABEL_O_ADJ,
+ .label_o_adj = {
+ .adj = ai_mpls_10_10_10_3,
+ .label = 3300,
+ .eos = MPLS_EOS,
+ },
+ };
+ fib_test_lb_bucket_t lchain_o_10_10_10_3 = {
+ .type = FT_LB_LABEL_CHAIN_O_ADJ,
+ .label_chain_o_adj = {
+ .adj = ai_mpls_10_10_10_3,
+ .label_chain_size = 2,
+ .label_chain = {
+ 99, 3300
+ },
+ .eos = MPLS_EOS,
+ },
+ };
+
+ fei = fib_table_entry_special_dpo_add(0,
+ &pfx_11_11_11_11_s_32,
+ FIB_SOURCE_SPECIAL,
+ FIB_ENTRY_FLAG_INTERPOSE,
+ &interposer);
+
+ FIB_TEST(!fib_test_validate_entry(fei,
+ FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+ 1,
+ &lchain_o_10_10_10_3),
+ "%U via interposer & mpls on adj",
+ format_fib_prefix, &pfx_11_11_11_11_s_32);
+
+ fib_table_entry_special_remove(0,
+ &pfx_11_11_11_11_s_32,
+ FIB_SOURCE_SPECIAL);
+ FIB_TEST(!fib_test_validate_entry(fei,
+ FIB_FORW_CHAIN_TYPE_UNICAST_IP4,
+ 1,
+ &l3300_o_10_10_10_3),
+ "%U via 10.10.10.1",
+ format_fib_prefix, &pfx_11_11_11_11_s_32);
+ adj_unlock(ai_mpls_10_10_10_3);