1 /*- 2 * Copyright (c) 2000-2013 Mark R V Murray 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_RANDOMDEV_H_INCLUDED 30 #define SYS_DEV_RANDOM_RANDOMDEV_H_INCLUDED 31 32 /* This header contains only those definitions that are global 33 * and non algorithm-specific for the entropy processor 34 */ 35 36 typedef void random_init_func_t(void); 37 typedef void random_deinit_func_t(void); 38 39 void randomdev_init_harvester(void (*)(const void *, u_int, u_int, enum random_entropy_source)); 40 void randomdev_init_reader(u_int (*)(uint8_t *, u_int)); 41 void randomdev_deinit_harvester(void); 42 void randomdev_deinit_reader(void); 43 44 /* Stub/fake routines for when no entropy processor is loaded */ 45 extern u_int dummy_random_read_phony(uint8_t *, u_int); 46 47 /* kern.random sysctls */ 48 #ifdef SYSCTL_DECL /* from sysctl.h */ 49 SYSCTL_DECL(_kern_random); 50 51 /* If this was C++, the macro below would be a template */ 52 #define RANDOM_CHECK_UINT(name, min, max) \ 53 static int \ 54 random_check_uint_##name(SYSCTL_HANDLER_ARGS) \ 55 { \ 56 if (oidp->oid_arg1 != NULL) { \ 57 if (*(u_int *)(oidp->oid_arg1) <= (min)) \ 58 *(u_int *)(oidp->oid_arg1) = (min); \ 59 else if (*(u_int *)(oidp->oid_arg1) > (max)) \ 60 *(u_int *)(oidp->oid_arg1) = (max); \ 61 } \ 62 return (sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, \ 63 req)); \ 64 } 65 #endif /* SYSCTL_DECL */ 66 67 #endif 68