lwip_random.c

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2017 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #include "lwip/opt.h"
00018 #include "lwip/debug.h"
00019 #include "lwip/def.h"
00020 #include "lwip_random.h"
00021 
00022 #if FEATURE_COMMON_PAL
00023 
00024 #include "randLIB.h"
00025 
00026 void lwip_seed_random(void)
00027 {
00028     randLIB_seed_random();
00029 }
00030 
00031 void lwip_add_random_seed(uint64_t seed)
00032 {
00033     randLIB_add_seed(seed);
00034 }
00035 
00036 inline uint32_t lwip_get_random(void)
00037 {
00038     return randLIB_get_32bit();
00039 }
00040 
00041 #else
00042 
00043 void lwip_seed_random(void)
00044 {
00045 }
00046 
00047 void lwip_add_random_seed(uint64_t seed)
00048 {
00049 }
00050 
00051 uint32_t lwip_get_random(void)
00052 {
00053     return rand();
00054 }
00055 
00056 #endif