5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18#ifndef LWIP_HDR_RANDOM_H
19#define LWIP_HDR_RANDOM_H
20
21#ifdef __cplusplus
22extern"C" {
23#endif
24
25/** Init seed for Pseudo Random
26 *
27 * Function shall seed the pseudo-random generator. Function
28 * is called during lwip initialisation.
29 */
30void lwip_seed_random(void);
31
32/** Update seed for pseudo-random generator
33 *
34 * Adds seed information to existing generator, to perturb the
35 * sequence.
36 *
37 * @param seed 64 bits of data to add to the seed.
38 */
39void lwip_add_random_seed(uint64_t seed);
40
41/** Generates random number.
42 *
43 * @return 32-bit random number
44 */
45 uint32_t lwip_get_random(void);
46
47#ifdef __cplusplus
48 }
49#endif
50
51#endif /* LWIP_HDR_RANDOM_H */
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