misc: add filter for specific error for pcap trace

Type: feature

Change-Id: I325257454df1cc22833fa6a1dedd4739d4d5a558
Signed-off-by: Benoît Ganne <bganne@cisco.com>

2 files changed, 35 insertions, 0 deletions

diff --git a/src/vlib/error.c b/src/vlib/error.c
index 99664c618a9..1a84e7e6801 100644
--- a/src/vlib/error.c
+++ b/src/vlib/error.c
@@ -210,6 +210,37 @@ vlib_register_errors (vlib_main_t * vm,
   }
 }
 
+uword
+unformat_vlib_error (unformat_input_t *input, va_list *args)
+{
+  vlib_main_t *vm = va_arg (*args, vlib_main_t *);
+  const vlib_error_main_t *em = &vm->error_main;
+  vlib_error_t *error_index = va_arg (*args, vlib_error_t *);
+  const vlib_node_t *node;
+  char *error_name;
+  u32 node_index;
+  vlib_error_t i;
+
+  if (!unformat (input, "%U.%s", unformat_vlib_node, vm, &node_index,
+		 &error_name))
+    return 0;
+
+  node = vlib_get_node (vm, node_index);
+  for (i = 0; i < node->n_errors; i++)
+    {
+      vlib_error_t ei = node->error_heap_index + i;
+      if (strcmp (em->counters_heap[ei].name, error_name) == 0)
+	{
+	  *error_index = ei;
+	  vec_free (error_name);
+	  return 1;
+	}
+    }
+
+  vec_free (error_name);
+  return 0;
+}
+
 static char *
 sev2str (enum vl_counter_severity_e s)
 {
diff --git a/src/vlib/error.h b/src/vlib/error.h
index 11757e05f67..2bffc6b9367 100644
--- a/src/vlib/error.h
+++ b/src/vlib/error.h
@@ -40,6 +40,8 @@
 #ifndef included_vlib_error_h
 #define included_vlib_error_h
 
+#include <vppinfra/format.h>
+
 typedef u16 vlib_error_t;
 
 enum vl_counter_severity_e
@@ -75,6 +77,8 @@ void vlib_register_errors (struct vlib_main_t *vm,
 			   u32 n_errors, char *error_strings[],
 			   vl_counter_t counters[]);
 
+unformat_function_t unformat_vlib_error;
+
 #endif /* included_vlib_error_h */
 
 /*