A Protocol Independent Hierarchical FIB (VPP-352)

Main Enhancements:
 - Protocol Independent FIB API
 - Hierarchical FIB entries. Dynamic recursive route resolution.
 - Extranet Support.
 - Integration of IP and MPLS forwarding.
 - Separation of FIB and Adjacency databases.
 - Data-Plane Object forwarding model.

Change-Id: I52dc815c0d0aa8b493e3cf6b978568f3cc82296c
Signed-off-by: Neale Ranns <nranns@cisco.com>

1 files changed, 61 insertions, 0 deletions

diff --git a/vnet/vnet/fib/fib_node_list.h b/vnet/vnet/fib/fib_node_list.h
new file mode 100644
index 00000000000..afee3c6152c
--- /dev/null
+++ b/vnet/vnet/fib/fib_node_list.h
@@ -0,0 +1,61 @@
+/*
+ * 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.
+ */
+/**
+ * @brief a hetrogeneous w.r.t. FIB node type, list of FIB nodes.
+ * Since we cannot use C pointers, due to memeory reallocs, the next/prev
+ * are described as an index to an element. Each element contains a pointer
+ * (key:{type, index}) to a FIB node.
+ */
+
+#ifndef __FIB_NODE_LIST_H__
+#define __FIB_NODE_LIST_H__
+
+#include <vnet/fib/fib_node.h>
+
+extern fib_node_list_t fib_node_list_create(void);
+extern void fib_node_list_destroy(fib_node_list_t *list);
+
+extern u32 fib_node_list_push_front(fib_node_list_t head,
+                                    int owner_id,
+                                    fib_node_type_t type,
+                                    fib_node_index_t index);
+extern u32 fib_node_list_push_back(fib_node_list_t head,
+                                   int owner_id,
+                                   fib_node_type_t type,
+                                   fib_node_index_t index);
+extern void fib_node_list_remove(fib_node_list_t head,
+                                 u32 sibling);
+extern void fib_node_list_elt_remove(u32 sibling);
+
+extern int fib_node_list_advance(u32 sibling);
+
+extern int fib_node_list_get_front(fib_node_list_t head,
+                                   fib_node_ptr_t *ptr);
+
+extern int fib_node_list_elt_get_next(u32 elt,
+                                      fib_node_ptr_t *ptr);
+
+extern u32 fib_node_list_get_size(fib_node_list_t head);
+
+/**
+ * @brief Callback function invoked during a list walk
+ */
+typedef int (*fib_node_list_walk_cb_t)(fib_node_ptr_t *owner,
+                                       void *args);
+
+extern void fib_node_list_walk(fib_node_list_t head,
+                               fib_node_list_walk_cb_t fn,
+                               void *args);
+#endif