/*
* magic.c - PPP Magic Number routines.
*
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
*
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by Carnegie Mellon University. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * 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, this list of conditions and the following disclaimer.
+ *
+ * 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 "Carnegie Mellon University" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For permission or any legal
+ * details, please contact
+ * Office of Technology Transfer
+ * Carnegie Mellon University
+ * 5000 Forbes Avenue
+ * Pittsburgh, PA 15213-3890
+ * (412) 268-4387, fax: (412) 268-7395
+ * tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by Computing Services
+ * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-#ifndef lint
-static char rcsid[] = "$Id: magic.c,v 1.1 1993/11/11 03:54:25 paulus Exp $";
+#ifdef HAVE_CONFIG_H
+#include "config.h"
#endif
#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
+#include "pppd.h"
#include "magic.h"
-static u_long next; /* Next value to return */
-
-extern u_long gethostid __ARGS((void));
-extern long random __ARGS((void));
-extern void srandom __ARGS((int));
-
+extern long mrand48 (void);
+extern void srand48 (long);
/*
* magic_init - Initialize the magic number generator.
*
- * Computes first magic number and seed for random number generator.
* Attempts to compute a random number seed which will not repeat.
- * The current method uses the current hostid and current time.
+ * The current method uses the current hostid, current process ID
+ * and current time, currently.
*/
-void magic_init()
+void
+magic_init(void)
{
- struct timeval tv;
+ long seed;
+ struct timeval t;
- next = gethostid();
- if (gettimeofday(&tv, NULL)) {
- perror("gettimeofday");
- exit(1);
- }
- next ^= (u_long) tv.tv_sec ^ (u_long) tv.tv_usec;
+ gettimeofday(&t, NULL);
+ seed = get_host_seed() ^ t.tv_sec ^ t.tv_usec ^ getpid();
+ srand48(seed);
+}
- srandom((int) next);
+/*
+ * magic - Returns the next magic number.
+ */
+u_int32_t
+magic(void)
+{
+ return (u_int32_t) mrand48();
}
+/*
+ * random_bytes - Fill a buffer with random bytes.
+ */
+void
+random_bytes(unsigned char *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; ++i)
+ buf[i] = mrand48() >> 24;
+}
+#ifdef NO_DRAND48
/*
- * magic - Returns the next magic number.
+ * Substitute procedures for those systems which don't have
+ * drand48 et al.
*/
-u_long magic()
+
+double
+drand48(void)
{
- u_long m;
+ return (double)random() / (double)0x7fffffffL; /* 2**31-1 */
+}
- m = next;
- next = (u_long) random();
- return (m);
+long
+mrand48(void)
+{
+ return random();
+}
+
+void
+srand48(long seedval)
+{
+ srandom((int)seedval);
}
+
+#endif