fib: A 16-8-8 and a 8-8-8-8 versions of an ip4_fib_t

Type: feature

The difference being the MTRIE type they contain.
THE FIB continues to use the 16-8-8 version.

Signed-off-by: Neale Ranns <neale@graphiant.com>
Change-Id: I5a54d4e6e6cc639f18a3fb65ef2925507a7ef1de

1 files changed, 74 insertions, 0 deletions

diff --git a/src/vnet/fib/ip4_fib_hash.h b/src/vnet/fib/ip4_fib_hash.h
new file mode 100644
index 00000000000..84b3b9ae834
--- /dev/null
+++ b/src/vnet/fib/ip4_fib_hash.h
@@ -0,0 +1,74 @@
+/*
+ * 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 The IPv4 FIB Hash table
+ */
+
+#ifndef __IP4_FIB_HASH_H__
+#define __IP4_FIB_HASH_H__
+
+#include <vlib/vlib.h>
+#include <vnet/ip/ip.h>
+
+typedef struct ip4_fib_hash_t_
+{
+  /* Hash table for each prefix length mapping. */
+  uword *fib_entry_by_dst_address[33];
+
+  /* Table ID (hash key) for this FIB. */
+  u32 table_id;
+} ip4_fib_hash_t;
+
+extern fib_node_index_t ip4_fib_hash_table_lookup(const ip4_fib_hash_t *fib,
+                                                  const ip4_address_t *addr,
+                                                  u32 len);
+extern index_t ip4_fib_hash_table_lookup_lb(const ip4_fib_hash_t *fib,
+                                            const ip4_address_t *addr);
+extern fib_node_index_t ip4_fib_hash_table_lookup_exact_match(const ip4_fib_hash_t *fib,
+                                                              const ip4_address_t *addr,
+                                                              u32 len);
+
+extern void ip4_fib_hash_table_entry_remove(ip4_fib_hash_t *fib,
+                                            const ip4_address_t *addr,
+                                            u32 len);
+
+extern void ip4_fib_hash_table_entry_insert(ip4_fib_hash_t *fib,
+                                            const ip4_address_t *addr,
+                                            u32 len,
+                                            fib_node_index_t fib_entry_index);
+extern void ip4_fib_hash_table_init(ip4_fib_hash_t *fib);
+extern void ip4_fib_hash_table_destroy(ip4_fib_hash_t *fib);
+
+/**
+ * @brief Walk all entries in a FIB table
+ * N.B: This is NOT safe to deletes. If you need to delete walk the whole
+ * table and store elements in a vector, then delete the elements
+ */
+extern void ip4_fib_hash_table_walk(ip4_fib_hash_t *fib,
+                                    fib_table_walk_fn_t fn,
+                                    void *ctx);
+
+/**
+ * @brief Walk all entries in a sub-tree of the FIB table
+ * N.B: This is NOT safe to deletes. If you need to delete walk the whole
+ * table and store elements in a vector, then delete the elements
+ */
+extern void ip4_fib_hash_table_sub_tree_walk(ip4_fib_hash_t *fib,
+                                             const fib_prefix_t *root,
+                                             fib_table_walk_fn_t fn,
+                                             void *ctx);
+
+#endif
+