1 files changed, 53 insertions, 0 deletions
diff --git a/src/vnet/adj/adj_types.h b/src/vnet/adj/adj_types.h
new file mode 100644
index 00000000..cf90c084
--- /dev/null
+++ b/src/vnet/adj/adj_types.h
@@ -0,0 +1,53 @@
+/*
+ * 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.
+ */
+
+#ifndef __ADJ_TYPES_H__
+#define __ADJ_TYPES_H__
+
+#include <vnet/vnet.h>
+
+/**
+ * @brief An index for adjacencies.
+ * Alas 'C' is not typesafe enough to b0rk when a u32 is used instead of
+ * an adi_index_t. However, for us humans, we can glean much more intent
+ * from the declaration
+ *  foo bar(adj_index_t t);
+ * than we can from
+ *  foo bar(u32 t);
+ */
+typedef u32 adj_index_t; 
+
+/**
+ * @brief Invalid ADJ index - used when no adj is known
+ * likewise blazoned capitals INVALID speak volumes where ~0 does not.
+ */
+#define ADJ_INDEX_INVALID ((u32)~0)
+
+/**
+ * @brief return codes from a adjacency walker callback function
+ */
+typedef enum adj_walk_rc_t_
+{
+    ADJ_WALK_RC_STOP,
+    ADJ_WALK_RC_CONTINUE,
+} adj_walk_rc_t;
+
+/**
+ * @brief Call back function when walking adjacencies
+ */
+typedef adj_walk_rc_t (*adj_walk_cb_t)(adj_index_t ai,
+				       void *ctx);
+
+#endif