2 * Copyright (c) 2013 Arthur Mesh <arthurmesh@gmail.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #ifndef SYS_DEV_RANDOM_RANDOM_ADAPTORS_H_INCLUDED
30 #define SYS_DEV_RANDOM_RANDOM_ADAPTORS_H_INCLUDED
32 #include <sys/eventhandler.h>
34 MALLOC_DECLARE(M_ENTROPY);
36 struct random_adaptors {
37 LIST_ENTRY(random_adaptors) entries; /* list of providers */
38 const char *name; /* name of random adaptor */
39 struct random_adaptor *rsp;
42 struct random_adaptor *random_adaptor_get(const char *);
43 int random_adaptor_register(const char *, struct random_adaptor *);
44 void random_adaptor_choose(struct random_adaptor **);
46 extern struct random_adaptor *random_adaptor;
49 * random_adaptor's should be registered prior to
50 * random module (SI_SUB_DRIVERS/SI_ORDER_MIDDLE)
52 #define RANDOM_ADAPTOR_MODULE(name, modevent, ver) \
53 static moduledata_t name##_mod = { \
58 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, \
60 MODULE_VERSION(name, ver); \
61 MODULE_DEPEND(name, random, 1, 1, 1);
63 typedef void (*random_adaptor_attach_hook)(void *, struct random_adaptor *);
64 EVENTHANDLER_DECLARE(random_adaptor_attach, random_adaptor_attach_hook);
66 /* kern.random sysctls */
67 #ifdef SYSCTL_DECL /* from sysctl.h */
68 SYSCTL_DECL(_kern_random);
69 #endif /* SYSCTL_DECL */
71 #endif /* SYS_DEV_RANDOM_RANDOM_ADAPTORS_H_INCLUDED */