Initial commit of vpp code.

[vpp.git] / vnet / vnet / mpls-gre / policy_encap.c

diff --git a/vnet/vnet/mpls-gre/policy_encap.c b/vnet/vnet/mpls-gre/policy_encap.c
new file mode 100644 (file)
index 0000000..5341151
--- /dev/null
+++ b/vnet/vnet/mpls-gre/policy_encap.c
@@ -0,0 +1,172 @@
+/*
+ * policy_encap.c: mpls-o-e policy encap
+ *
+ * Copyright (c) 2012-2014 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 <vlib/vlib.h>
+#include <vnet/pg/pg.h>
+#include <vnet/mpls-gre/mpls.h>
+
+typedef struct {
+  u32 next_index;
+  u32 encap_index;
+} mpls_policy_encap_trace_t;
+
+u8 * format_mpls_policy_encap_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  mpls_policy_encap_trace_t * t = va_arg (*args, mpls_policy_encap_trace_t *);
+
+  s = format (s, "MPLS-POLICY-ENCAP: next-index %d encap-index %d",
+              t->next_index, t->encap_index);
+
+  return s;
+}
+
+vlib_node_registration_t mpls_policy_encap_node;
+
+#define foreach_mpls_policy_encap_next          \
+_(DROP, "error-drop")
+
+typedef enum {
+#define _(s,n) MPLS_POLICY_ENCAP_NEXT_##s,
+  foreach_mpls_policy_encap_next
+#undef _
+  MPLS_POLICY_ENCAP_N_NEXT,
+} mpls_policy_encap_next_t;
+
+#define foreach_mpls_policy_error                               \
+_(PKTS_ENCAP, "mpls policy tunnel packets encapsulated")
+
+typedef enum {
+#define _(n,s) MPLS_POLICY_ENCAP_ERROR_##n,
+  foreach_mpls_policy_error
+  MPLS_POLICY_ENCAP_N_ERROR,
+#undef _
+} mpls_policy_encap_error_t;
+
+static char * mpls_policy_encap_error_strings[] =
+  {
+#define _(n,s) s,
+    foreach_mpls_policy_error
+#undef _
+};
+    
+static uword
+mpls_policy_encap (vlib_main_t * vm,
+                   vlib_node_runtime_t * node,
+                   vlib_frame_t * from_frame)
+{
+  u32 n_left_from, next_index, * from, * to_next;
+  mpls_main_t * mm = &mpls_main;
+  
+  from = vlib_frame_vector_args (from_frame);
+  n_left_from = from_frame->n_vectors;
+  
+  next_index = node->cached_next_index;
+  
+  while (n_left_from > 0)
+    {
+      u32 n_left_to_next;
+
+      vlib_get_next_frame (vm, node, next_index,
+                          to_next, n_left_to_next);
+
+      while (n_left_from > 0 && n_left_to_next > 0)
+       {
+         u32 bi0;
+         vlib_buffer_t * b0;
+          u8 * h0;
+          u32 encap_index0;
+          u32 next0;
+          mpls_encap_t * e0;
+
+         bi0 = from[0];
+         to_next[0] = bi0;
+         from += 1;
+         to_next += 1;
+         n_left_from -= 1;
+         n_left_to_next -= 1;
+
+         b0 = vlib_get_buffer (vm, bi0);
+
+          encap_index0 = vnet_buffer(b0)->l2_classify.opaque_index;
+
+          e0 = pool_elt_at_index (mm->encaps, encap_index0);
+
+          vlib_buffer_advance (b0, -(word)vec_len(e0->rewrite));
+          h0 = vlib_buffer_get_current (b0);
+          memcpy (h0, e0->rewrite, vec_len(e0->rewrite));
+
+          next0 = e0->output_next_index;
+
+          if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) 
+            {
+              mpls_policy_encap_trace_t *tr = 
+                vlib_add_trace (vm, node, b0, sizeof (*tr));
+              tr->next_index = next0;
+              tr->encap_index = encap_index0;
+            }
+         vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+                                          to_next, n_left_to_next,
+                                          bi0, next0);
+       }
+      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+    }
+  vlib_node_increment_counter (vm, mpls_policy_encap_node.index,
+                               MPLS_POLICY_ENCAP_ERROR_PKTS_ENCAP, 
+                               from_frame->n_vectors);
+  return from_frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (mpls_policy_encap_node) =  {
+  .function = mpls_policy_encap,
+  .name = "mpls-policy-encap",
+  /* Takes a vector of packets. */
+  .vector_size = sizeof (u32),
+  
+  .runtime_data_bytes = 0,
+  
+  .n_errors = MPLS_POLICY_ENCAP_N_ERROR,
+  .error_strings = mpls_policy_encap_error_strings,
+  
+  .format_trace = format_mpls_policy_encap_trace,
+  
+  .n_next_nodes = MPLS_POLICY_ENCAP_N_NEXT,
+  .next_nodes = {
+#define _(s,n) [MPLS_POLICY_ENCAP_NEXT_##s] = n,
+    foreach_mpls_policy_encap_next
+#undef _
+  },
+};
+
+static clib_error_t *
+mpls_policy_encap_init (vlib_main_t * vm)
+{
+  mpls_main_t * mm = &mpls_main;
+  clib_error_t * error;
+
+  if ((error = vlib_call_init_function (vm, mpls_init)))
+    return error;
+  
+  mm->ip_classify_mpls_policy_encap_next_index = 
+    vlib_node_add_next (mm->vlib_main,
+                        ip4_classify_node.index, 
+                        mpls_policy_encap_node.index);
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (mpls_policy_encap_init);