FD.io VPP  v20.09-64-g4f7b92f0a
Vector Packet Processing
wireguard_index_table.c
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1 /*
2  * Copyright (c) 2020 Doc.ai 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 #include <vppinfra/hash.h>
17 #include <vppinfra/pool.h>
18 #include <vppinfra/random.h>
20 
21 u32
22 wg_index_table_add (wg_index_table_t * table, u32 peer_pool_idx, u32 rnd_seed)
23 {
24  u32 key;
25 
26  while (1)
27  {
28  key = random_u32 (&rnd_seed);
29  if (hash_get (table->hash, key))
30  continue;
31 
32  hash_set (table->hash, key, peer_pool_idx);
33  break;
34  }
35  return key;
36 }
37 
38 void
40 {
41  uword *p;
42  p = hash_get (table->hash, key);
43  if (p)
44  hash_unset (table->hash, key);
45 }
46 
47 u32 *
49 {
50  uword *p;
51 
52  p = hash_get (table->hash, key);
53  return (u32 *) p;
54 }
55 
56 /*
57  * fd.io coding-style-patch-verification: ON
58  *
59  * Local Variables:
60  * eval: (c-set-style "gnu")
61  * End:
62  */
#define hash_set(h, key, value)
Definition: hash.h:255
#define hash_unset(h, key)
Definition: hash.h:261
Fixed length block allocator.
unsigned int u32
Definition: types.h:88
#define hash_get(h, key)
Definition: hash.h:249
void wg_index_table_del(wg_index_table_t *table, u32 key)
u32 wg_index_table_add(wg_index_table_t *table, u32 peer_pool_idx, u32 rnd_seed)
typedef key
Definition: ipsec_types.api:85
u64 uword
Definition: types.h:112
Linear Congruential Random Number Generator.
static u32 random_u32(u32 *seed)
32-bit random number generator
Definition: random.h:69
u32 * wg_index_table_lookup(const wg_index_table_t *table, u32 key)