/* * random.h -- A strong random number generator * * $Id: random.h,v 1.16 1998/06/21 11:33:31 bde Exp $ * * Version 0.95, last modified 18-Oct-95 *  * Copyright Theodore Ts'o, 1994, 1995.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, and the entire permission notice in its entirety, *    including the disclaimer of warranties. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote *    products derived from this software without specific prior *    written permission. *  * ALTERNATIVELY, this product may be distributed under the terms of * the GNU Public License, in which case the provisions of the GPL are * required INSTEAD OF the above restrictions.  (This clause is * necessary due to a potential bad interaction between the GPL and * the restrictions contained in a BSD-style copyright.) *  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * *//* * Many kernel routines will have a use for good random numbers, * for example, for truely random TCP sequence numbers, which prevent * certain forms of TCP spoofing attacks. *  */#ifndef	_MACHINE_RANDOM_H_#define	_MACHINE_RANDOM_H_#include <sys/ioccom.h>#define	MEM_SETIRQ	_IOW('r', 1, u_int16_t)	/* set interrupt */#define	MEM_CLEARIRQ	_IOW('r', 2, u_int16_t)	/* clear interrupt */#define	MEM_RETURNIRQ	_IOR('r', 3, u_int16_t)	/* return interrupt */#ifdef KERNEL/* Type of the cookie passed to add_interrupt_randomness. */struct random_softc {	inthand2_t	*sc_handler;	void		*sc_arg;	int		sc_intr;};/* Exported functions */void rand_initialize(void);void add_keyboard_randomness(u_char scancode);inthand2_t add_interrupt_randomness;#ifdef notusedvoid add_blkdev_randomness(int major);#endif#ifdef notusedvoid get_random_bytes(void *buf, u_int nbytes);#endifu_int read_random(void *buf, u_int size);u_int read_random_unlimited(void *buf, u_int size);#ifdef notusedu_int write_random(const char *buf, u_int nbytes);#endifint random_poll(dev_t dev, int events, struct proc *p);#endif /* KERNEL */#endif /* !_MACHINE_RANDOM_H_ */