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59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
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* magic.c - PPP Magic Number routines.
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*
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* Copyright (c) 1989 Carnegie Mellon University.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by Carnegie Mellon University. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#define RCSID "$Id$"
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include "pppd.h"
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#include "magic.h"
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static const char rcsid[] = RCSID;
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/*
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* magic_init - Initialize the magic number generator.
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*
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* Attempts to compute a random number seed which will not repeat.
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* The current method uses the current hostid, current process ID
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* and current time, currently.
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*/
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void
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magic_init(void)
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{
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long seed;
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struct timeval t;
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gettimeofday(&t, NULL);
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seed = get_host_seed() ^ t.tv_sec ^ t.tv_usec ^ getpid();
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srand48(seed);
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}
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/*
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* magic - Returns the next magic number.
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*/
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uint32_t
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magic(void)
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{
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return (uint32_t) mrand48();
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}
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