Diff: features/lwipstack/lwip-sys/lwip_random.h

Revision:

0:38ceb79fef03

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/features/lwipstack/lwip-sys/lwip_random.h	Wed Nov 28 15:10:15 2018 +0000
@@ -0,0 +1,50 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2017 ARM Limited
+ *
+ * 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.
+ */
+
+#ifndef LWIP_HDR_RANDOM_H
+#define LWIP_HDR_RANDOM_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Init seed for Pseudo Random
+ *
+ *  Function shall seed the pseudo-random generator. Function
+ *  is called during lwip initialisation.
+ */
+void lwip_seed_random(void);
+
+/** Update seed for pseudo-random generator
+ *
+ *  Adds seed information to existing generator, to perturb the
+ *  sequence.
+ *
+ *  @param seed     64 bits of data to add to the seed.
+ */
+void lwip_add_random_seed(uint64_t seed);
+
+/** Generates random number.
+ *
+ *  @return         32-bit random number
+ */
+uint32_t lwip_get_random(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_HDR_RANDOM_H */