NAT: counters (VPP-1484)

[vpp.git] / src / plugins / nat / nat44_classify.c

diff --git a/src/plugins/nat/nat44_classify.c b/src/plugins/nat/nat44_classify.c
index 8608fc5..8a417dc 100644 (file)
--- a/src/plugins/nat/nat44_classify.c
+++ b/src/plugins/nat/nat44_classify.c
@@ -31,7 +31,10 @@ vlib_node_registration_t nat44_handoff_classify_node;
 
 #define foreach_nat44_classify_error                      \
 _(MAX_REASS, "Maximum reassemblies exceeded")             \
-_(MAX_FRAG, "Maximum fragments per reassembly exceeded")
+_(MAX_FRAG, "Maximum fragments per reassembly exceeded")  \
+_(NEXT_IN2OUT, "next in2out")                             \
+_(NEXT_OUT2IN, "next out2in")                             \
+_(FRAG_CACHED, "fragment cached")
 
 typedef enum
 {
@@ -93,6 +96,7 @@ nat44_classify_node_fn_inline (vlib_main_t * vm,
   snat_main_per_thread_data_t *tsm = &sm->per_thread_data[thread_index];
   u32 *fragments_to_drop = 0;
   u32 *fragments_to_loopback = 0;
+  u32 next_in2out = 0, next_out2in = 0, frag_cached = 0;
 
   from = vlib_frame_vector_args (frame);
   n_left_from = frame->n_vectors;
@@ -361,12 +365,18 @@ nat44_classify_node_fn_inline (vlib_main_t * vm,
            {
              n_left_to_next++;
              to_next--;
+             frag_cached++;
            }
          else
-           /* verify speculative enqueue, maybe switch current next frame */
-           vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
-                                            to_next, n_left_to_next,
-                                            bi0, next0);
+           {
+             next_in2out += next0 == NAT44_CLASSIFY_NEXT_IN2OUT;
+             next_out2in += next0 == NAT44_CLASSIFY_NEXT_OUT2IN;
+
+             /* verify speculative enqueue, maybe switch current next frame */
+             vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+                                              to_next, n_left_to_next,
+                                              bi0, next0);
+           }
 
          if (n_left_from == 0 && vec_len (fragments_to_loopback))
            {
@@ -398,6 +408,13 @@ nat44_classify_node_fn_inline (vlib_main_t * vm,
 
   vec_free (fragments_to_drop);
 
+  vlib_node_increment_counter (vm, node->node_index,
+                              NAT44_CLASSIFY_ERROR_NEXT_IN2OUT, next_in2out);
+  vlib_node_increment_counter (vm, node->node_index,
+                              NAT44_CLASSIFY_ERROR_NEXT_OUT2IN, next_out2in);
+  vlib_node_increment_counter (vm, node->node_index,
+                              NAT44_CLASSIFY_ERROR_FRAG_CACHED, frag_cached);
+
   return frame->n_vectors;
 }