The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/random.h

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    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: releng/6.3/sys/sys/random.h 173886 2007-11-24 19:45:58Z cvs2svn $
   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_ */

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