1 files changed, 156 insertions, 0 deletions
diff --git a/src/vnet/mpls/mpls_features.c b/src/vnet/mpls/mpls_features.c
new file mode 100644
index 00000000000..a7593c55b09
--- /dev/null
+++ b/src/vnet/mpls/mpls_features.c
@@ -0,0 +1,156 @@
+/*
+ * mpls_features.c: MPLS input and output features
+ *
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/mpls/mpls.h>
+
+always_inline uword
+mpls_terminate (vlib_main_t * vm,
+                vlib_node_runtime_t * node,
+                vlib_frame_t * frame,
+                int error_code)
+{
+  u32 * buffers = vlib_frame_vector_args (frame);
+  uword n_packets = frame->n_vectors;
+
+  vlib_error_drop_buffers (vm, node,
+                           buffers,
+                           /* stride */ 1,
+                           n_packets,
+                           /* next */ 0,
+                           mpls_input_node.index,
+                           error_code);
+
+  return n_packets;
+}
+
+static uword
+mpls_punt (vlib_main_t * vm,
+           vlib_node_runtime_t * node,
+           vlib_frame_t * frame)
+{
+    return (mpls_terminate(vm, node, frame, MPLS_ERROR_PUNT));
+}
+
+VLIB_REGISTER_NODE (mpls_punt_node) = {
+  .function = mpls_punt,
+  .name = "mpls-punt",
+  .vector_size = sizeof (u32),
+
+  .n_next_nodes = 1,
+  .next_nodes = {
+    [0] = "error-punt",
+  },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (mpls_punt_node, mpls_punt)
+
+static uword
+mpls_drop (vlib_main_t * vm,
+           vlib_node_runtime_t * node,
+           vlib_frame_t * frame)
+{
+    return (mpls_terminate(vm, node, frame, MPLS_ERROR_DROP));
+}
+
+VLIB_REGISTER_NODE (mpls_drop_node) = {
+  .function = mpls_drop,
+  .name = "mpls-drop",
+  .vector_size = sizeof (u32),
+
+  .n_next_nodes = 1,
+  .next_nodes = {
+    [0] = "error-drop",
+  },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (mpls_drop_node, mpls_drop)
+
+static uword
+mpls_not_enabled (vlib_main_t * vm,
+                  vlib_node_runtime_t * node,
+                  vlib_frame_t * frame)
+{
+    return (mpls_terminate(vm, node, frame, MPLS_ERROR_NOT_ENABLED));
+}
+
+VLIB_REGISTER_NODE (mpls_not_enabled_node) = {
+  .function = mpls_not_enabled,
+  .name = "mpls-not-enabled",
+  .vector_size = sizeof (u32),
+
+  .n_next_nodes = 1,
+  .next_nodes = {
+    [0] = "error-drop",
+  },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (mpls_not_enabled_node, mpls_not_enabled)
+
+VNET_FEATURE_ARC_INIT (mpls_input, static) =
+{
+  .arc_name  = "mpls-input",
+  .start_nodes = VNET_FEATURES ("mpls-input"),
+  .arc_index_ptr = &mpls_main.input_feature_arc_index,
+};
+
+VNET_FEATURE_INIT (mpls_lookup, static) = {
+  .arc_name = "mpls-input",
+  .node_name = "mpls-lookup",
+  .runs_before = VNET_FEATURES ("mpls-not-enabled"),
+};
+
+VNET_FEATURE_INIT (mpls_not_enabled, static) = {
+  .arc_name = "mpls-input",
+  .node_name = "mpls-not-enabled",
+  .runs_before = VNET_FEATURES (0), /* not before any other features */
+};
+
+VNET_FEATURE_ARC_INIT (mpls_output, static) =
+{
+  .arc_name  = "mpls-output",
+  .start_nodes = VNET_FEATURES ("mpls-output", "mpls-midchain"),
+  .arc_index_ptr = &mpls_main.output_feature_arc_index,
+};
+
+/* Built-in ip4 tx feature path definition */
+VNET_FEATURE_INIT (mpls_interface_output, static) = {
+  .arc_name = "mpls-output",
+  .node_name = "interface-output",
+  .runs_before = 0, /* not before any other features */
+};
+
+static clib_error_t *
+mpls_sw_interface_add_del (vnet_main_t * vnm,
+                           u32 sw_if_index,
+                           u32 is_add)
+{
+  mpls_main_t * mm = &mpls_main;
+
+  vec_validate_init_empty (mm->mpls_enabled_by_sw_if_index, sw_if_index, 0);
+  vec_validate_init_empty (mm->fib_index_by_sw_if_index, sw_if_index, 0);
+
+  vnet_feature_enable_disable ("mpls-input", "mpls-not-enabled", sw_if_index,
+			       is_add, 0, 0);
+  vnet_feature_enable_disable ("mpls-output", "interface-output", sw_if_index,
+			       is_add, 0, 0);
+
+  return /* no error */ 0;
+}
+
+VNET_SW_INTERFACE_ADD_DEL_FUNCTION (mpls_sw_interface_add_del);
+
+