Sam Walsh / F7_Ethernet_F746ZG

Forked from the DieterGraef Library

Fork of F7_Ethernet by Dieter Graef

lwip/netif/ppp/randm.h@2:fdef48f830c0, 2016-11-18 (annotated)

Committer:
EmbeddedSam
Date:
Fri Nov 18 12:48:10 2016 +0000
Revision:
2:fdef48f830c0
Parent:
0:d26c1b55cfca 
Linking MQTT together, starting with mbed-cli

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DieterGraef 0:d26c1b55cfca 1 /*****************************************************************************
DieterGraef 0:d26c1b55cfca 2 * randm.h - Random number generator header file.
DieterGraef 0:d26c1b55cfca 3 *
DieterGraef 0:d26c1b55cfca 4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
DieterGraef 0:d26c1b55cfca 5 * Copyright (c) 1998 Global Election Systems Inc.
DieterGraef 0:d26c1b55cfca 6 *
DieterGraef 0:d26c1b55cfca 7 * The authors hereby grant permission to use, copy, modify, distribute,
DieterGraef 0:d26c1b55cfca 8 * and license this software and its documentation for any purpose, provided
DieterGraef 0:d26c1b55cfca 9 * that existing copyright notices are retained in all copies and that this
DieterGraef 0:d26c1b55cfca 10 * notice and the following disclaimer are included verbatim in any
DieterGraef 0:d26c1b55cfca 11 * distributions. No written agreement, license, or royalty fee is required
DieterGraef 0:d26c1b55cfca 12 * for any of the authorized uses.
DieterGraef 0:d26c1b55cfca 13 *
DieterGraef 0:d26c1b55cfca 14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
DieterGraef 0:d26c1b55cfca 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
DieterGraef 0:d26c1b55cfca 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
DieterGraef 0:d26c1b55cfca 17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
DieterGraef 0:d26c1b55cfca 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
DieterGraef 0:d26c1b55cfca 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DieterGraef 0:d26c1b55cfca 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
DieterGraef 0:d26c1b55cfca 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
DieterGraef 0:d26c1b55cfca 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
DieterGraef 0:d26c1b55cfca 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
DieterGraef 0:d26c1b55cfca 24 *
DieterGraef 0:d26c1b55cfca 25 ******************************************************************************
DieterGraef 0:d26c1b55cfca 26 * REVISION HISTORY
DieterGraef 0:d26c1b55cfca 27 *
DieterGraef 0:d26c1b55cfca 28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
DieterGraef 0:d26c1b55cfca 29 * Ported to lwIP.
DieterGraef 0:d26c1b55cfca 30 * 98-05-29 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
DieterGraef 0:d26c1b55cfca 31 * Extracted from avos.
DieterGraef 0:d26c1b55cfca 32 *****************************************************************************/
DieterGraef 0:d26c1b55cfca 33
DieterGraef 0:d26c1b55cfca 34 #ifndef RANDM_H
DieterGraef 0:d26c1b55cfca 35 #define RANDM_H
DieterGraef 0:d26c1b55cfca 36
DieterGraef 0:d26c1b55cfca 37 /***********************
DieterGraef 0:d26c1b55cfca 38 *** PUBLIC FUNCTIONS ***
DieterGraef 0:d26c1b55cfca 39 ***********************/
DieterGraef 0:d26c1b55cfca 40 /*
DieterGraef 0:d26c1b55cfca 41 * Initialize the random number generator.
DieterGraef 0:d26c1b55cfca 42 */
DieterGraef 0:d26c1b55cfca 43 void avRandomInit(void);
DieterGraef 0:d26c1b55cfca 44
DieterGraef 0:d26c1b55cfca 45 /*
DieterGraef 0:d26c1b55cfca 46 * Churn the randomness pool on a random event. Call this early and often
DieterGraef 0:d26c1b55cfca 47 * on random and semi-random system events to build randomness in time for
DieterGraef 0:d26c1b55cfca 48 * usage. For randomly timed events, pass a null pointer and a zero length
DieterGraef 0:d26c1b55cfca 49 * and this will use the system timer and other sources to add randomness.
DieterGraef 0:d26c1b55cfca 50 * If new random data is available, pass a pointer to that and it will be
DieterGraef 0:d26c1b55cfca 51 * included.
DieterGraef 0:d26c1b55cfca 52 */
DieterGraef 0:d26c1b55cfca 53 void avChurnRand(char *randData, u32_t randLen);
DieterGraef 0:d26c1b55cfca 54
DieterGraef 0:d26c1b55cfca 55 /*
DieterGraef 0:d26c1b55cfca 56 * Randomize our random seed value. To be called for truely random events
DieterGraef 0:d26c1b55cfca 57 * such as user operations and network traffic.
DieterGraef 0:d26c1b55cfca 58 */
DieterGraef 0:d26c1b55cfca 59 #if MD5_SUPPORT
DieterGraef 0:d26c1b55cfca 60 #define avRandomize() avChurnRand(NULL, 0)
DieterGraef 0:d26c1b55cfca 61 #else /* MD5_SUPPORT */
DieterGraef 0:d26c1b55cfca 62 void avRandomize(void);
DieterGraef 0:d26c1b55cfca 63 #endif /* MD5_SUPPORT */
DieterGraef 0:d26c1b55cfca 64
DieterGraef 0:d26c1b55cfca 65 /*
DieterGraef 0:d26c1b55cfca 66 * Use the random pool to generate random data. This degrades to pseudo
DieterGraef 0:d26c1b55cfca 67 * random when used faster than randomness is supplied using churnRand().
DieterGraef 0:d26c1b55cfca 68 * Thus it's important to make sure that the results of this are not
DieterGraef 0:d26c1b55cfca 69 * published directly because one could predict the next result to at
DieterGraef 0:d26c1b55cfca 70 * least some degree. Also, it's important to get a good seed before
DieterGraef 0:d26c1b55cfca 71 * the first use.
DieterGraef 0:d26c1b55cfca 72 */
DieterGraef 0:d26c1b55cfca 73 void avGenRand(char *buf, u32_t bufLen);
DieterGraef 0:d26c1b55cfca 74
DieterGraef 0:d26c1b55cfca 75 /*
DieterGraef 0:d26c1b55cfca 76 * Return a new random number.
DieterGraef 0:d26c1b55cfca 77 */
DieterGraef 0:d26c1b55cfca 78 u32_t avRandom(void);
DieterGraef 0:d26c1b55cfca 79
DieterGraef 0:d26c1b55cfca 80
DieterGraef 0:d26c1b55cfca 81 #endif /* RANDM_H */