1 /*- 2 * Copyright (c) 2000 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_RANDOM_H_ 30 #define _SYS_RANDOM_H_ 31 32 #ifdef _KERNEL 33 34 int read_random(void *, int); 35 36 /* 37 * Note: if you add or remove members of esource, remember to also update the 38 * KASSERT regarding what valid members are in random_harvest_internal(). 39 */ 40 enum esource { 41 RANDOM_START = 0, 42 RANDOM_WRITE = 0, 43 RANDOM_KEYBOARD, 44 RANDOM_MOUSE, 45 RANDOM_NET, 46 RANDOM_INTERRUPT, 47 RANDOM_PURE, 48 ENTROPYSOURCE 49 }; 50 void random_harvest(void *, u_int, u_int, u_int, enum esource); 51 52 /* Allow the sysadmin to select the broad category of 53 * entropy types to harvest 54 */ 55 struct harvest_select { 56 int ethernet; 57 int point_to_point; 58 int interrupt; 59 int swi; 60 }; 61 62 extern struct harvest_select harvest; 63 64 #endif /* _KERNEL */ 65 66 #endif /* _SYS_RANDOM_H_ */ 67