Keil Studio Cloud
Mistake on this page?
Report an issue in GitHub or email us
magic.h
1 /*
2  * magic.h - PPP Magic Number definitions.
3  *
4  * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in
15  * the documentation and/or other materials provided with the
16  * distribution.
17  *
18  * 3. The name "Carnegie Mellon University" must not be used to
19  * endorse or promote products derived from this software without
20  * prior written permission. For permission or any legal
21  * details, please contact
22  * Office of Technology Transfer
23  * Carnegie Mellon University
24  * 5000 Forbes Avenue
25  * Pittsburgh, PA 15213-3890
26  * (412) 268-4387, fax: (412) 268-7395
27  * tech-transfer@andrew.cmu.edu
28  *
29  * 4. Redistributions of any form whatsoever must retain the following
30  * acknowledgment:
31  * "This product includes software developed by Computing Services
32  * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
33  *
34  * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
35  * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
36  * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
37  * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
38  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
39  * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
40  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
41  *
42  * $Id: magic.h,v 1.5 2003/06/11 23:56:26 paulus Exp $
43  */
44 /*****************************************************************************
45 * /@code
46 *
47 * randm.h - Random number generator header file.
48 *
49 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
50 * Copyright (c) 1998 Global Election Systems Inc.
51 *
52 * The authors hereby grant permission to use, copy, modify, distribute,
53 * and license this software and its documentation for any purpose, provided
54 * that existing copyright notices are retained in all copies and that this
55 * notice and the following disclaimer are included verbatim in any
56 * distributions. No written agreement, license, or royalty fee is required
57 * for any of the authorized uses.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
60 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
61 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
62 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
63 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
64 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
65 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
66 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
67 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
68 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
69 *
70 ******************************************************************************
71 * REVISION HISTORY
72 *
73 * 03-01-01 Marc Boucher <marc@mbsi.ca>
74 * Ported to lwIP.
75 * 98-05-29 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
76 * Extracted from avos.
77 *
78 * /@endcode
79 *****************************************************************************/
80 
81 #include "ppp_opts.h"
82 #if PPP_SUPPORT /* don't build if not configured for use in ppp_opts.h */
83 
84 #ifndef MAGIC_H
85 #define MAGIC_H
86 
87 #ifdef __cplusplus
88 extern "C" {
89 #endif
90 
91 /***********************
92 *** PUBLIC FUNCTIONS ***
93 ***********************/
94 
95 /*
96  * Initialize the random number generator.
97  */
98 void magic_init(void);
99 
100 /*
101  * Randomize our random seed value. To be called for truely random events
102  * such as user operations and network traffic.
103  */
104 void magic_randomize(void);
105 
106 /*
107  * Return a new random number.
108  */
109 u32_t magic(void); /* Returns the next magic number */
110 
111 /*
112  * Fill buffer with random bytes
113  *
114  * Use the random pool to generate random data. This degrades to pseudo
115  * random when used faster than randomness is supplied using magic_churnrand().
116  * Thus it's important to make sure that the results of this are not
117  * published directly because one could predict the next result to at
118  * least some degree. Also, it's important to get a good seed before
119  * the first use.
120  */
121 void magic_random_bytes(unsigned char *buf, u32_t buf_len);
122 
123 /*
124  * Return a new random number between 0 and (2^pow)-1 included.
125  */
126 u32_t magic_pow(u8_t pow);
127 
128 #ifdef __cplusplus
129 }
130 #endif
131 
132 #endif /* MAGIC_H */
133 
134 #endif /* PPP_SUPPORT */
Important Information for this Arm website

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies. If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled. By disabling cookies, some features of the site will not work.