1/*- 2 * Copyright (c) 2013 Arthur Mesh <arthurmesh@gmail.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 14 * 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. 25 * 26 * $FreeBSD$ 27 */ 28 29#ifndef SYS_DEV_RANDOM_RANDOM_ADAPTORS_H_INCLUDED 30#define SYS_DEV_RANDOM_RANDOM_ADAPTORS_H_INCLUDED 31 32#include <sys/eventhandler.h> 33 34MALLOC_DECLARE(M_ENTROPY); 35 36struct random_adaptors { 37 LIST_ENTRY(random_adaptors) entries; /* list of providers */ 38 const char *name; /* name of random adaptor */ 39 struct random_adaptor *rsp; 40}; 41 42struct random_adaptor *random_adaptor_get(const char *); 43int random_adaptor_register(const char *, struct random_adaptor *); 44void random_adaptor_choose(struct random_adaptor **); 45 46extern struct random_adaptor *random_adaptor; 47 48/* 49 * random_adaptor's should be registered prior to 50 * random module (SI_SUB_DRIVERS/SI_ORDER_MIDDLE) 51 */ 52#define RANDOM_ADAPTOR_MODULE(name, modevent, ver) \ 53 static moduledata_t name##_mod = { \ 54 #name, \ 55 modevent, \ 56 0 \ 57 }; \ 58 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, \ 59 SI_ORDER_SECOND); \ 60 MODULE_VERSION(name, ver); \ 61 MODULE_DEPEND(name, random, 1, 1, 1); 62 63typedef void (*random_adaptor_attach_hook)(void *, struct random_adaptor *); 64EVENTHANDLER_DECLARE(random_adaptor_attach, random_adaptor_attach_hook); 65 66/* kern.random sysctls */ 67#ifdef SYSCTL_DECL /* from sysctl.h */ 68SYSCTL_DECL(_kern_random); 69#endif /* SYSCTL_DECL */ 70 71#endif /* SYS_DEV_RANDOM_RANDOM_ADAPTORS_H_INCLUDED */ 72