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