fib: A 16-8-8 and a 8-8-8-8 versions of an ip4_fib_t
[vpp.git] / src / vnet / fib / ip4_fib_hash.h
1 /*
2  * Copyright (c) 2016 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 /**
16  * @brief The IPv4 FIB Hash table
17  */
18
19 #ifndef __IP4_FIB_HASH_H__
20 #define __IP4_FIB_HASH_H__
21
22 #include <vlib/vlib.h>
23 #include <vnet/ip/ip.h>
24
25 typedef struct ip4_fib_hash_t_
26 {
27   /* Hash table for each prefix length mapping. */
28   uword *fib_entry_by_dst_address[33];
29
30   /* Table ID (hash key) for this FIB. */
31   u32 table_id;
32 } ip4_fib_hash_t;
33
34 extern fib_node_index_t ip4_fib_hash_table_lookup(const ip4_fib_hash_t *fib,
35                                                   const ip4_address_t *addr,
36                                                   u32 len);
37 extern index_t ip4_fib_hash_table_lookup_lb(const ip4_fib_hash_t *fib,
38                                             const ip4_address_t *addr);
39 extern fib_node_index_t ip4_fib_hash_table_lookup_exact_match(const ip4_fib_hash_t *fib,
40                                                               const ip4_address_t *addr,
41                                                               u32 len);
42
43 extern void ip4_fib_hash_table_entry_remove(ip4_fib_hash_t *fib,
44                                             const ip4_address_t *addr,
45                                             u32 len);
46
47 extern void ip4_fib_hash_table_entry_insert(ip4_fib_hash_t *fib,
48                                             const ip4_address_t *addr,
49                                             u32 len,
50                                             fib_node_index_t fib_entry_index);
51 extern void ip4_fib_hash_table_init(ip4_fib_hash_t *fib);
52 extern void ip4_fib_hash_table_destroy(ip4_fib_hash_t *fib);
53
54 /**
55  * @brief Walk all entries in a FIB table
56  * N.B: This is NOT safe to deletes. If you need to delete walk the whole
57  * table and store elements in a vector, then delete the elements
58  */
59 extern void ip4_fib_hash_table_walk(ip4_fib_hash_t *fib,
60                                     fib_table_walk_fn_t fn,
61                                     void *ctx);
62
63 /**
64  * @brief Walk all entries in a sub-tree of the FIB table
65  * N.B: This is NOT safe to deletes. If you need to delete walk the whole
66  * table and store elements in a vector, then delete the elements
67  */
68 extern void ip4_fib_hash_table_sub_tree_walk(ip4_fib_hash_t *fib,
69                                              const fib_prefix_t *root,
70                                              fib_table_walk_fn_t fn,
71                                              void *ctx);
72
73 #endif
74