Pascal Nysten / lwip

Adapted to Lora Semtech + Nucleo

Dependencies:   DebugLib

Dependents:   LoRaWAN-lmic-app LoRaWAN-lmic-app LoRaWAN-test-10secs LoRaPersonalizedDeviceForEverynet ... more

Fork of lwip_ppp_ethernet by Donatien Garnier

src/core/def.c@0:8e01dca41002, 2012-05-24 (annotated)

Committer:
donatien
Date:
Thu May 24 15:53:48 2012 +0000
Revision:
0:8e01dca41002
Merge with Emilio's LwIp

Who changed what in which revision?

UserRevisionLine numberNew contents of line
donatien 0:8e01dca41002 1 /**
donatien 0:8e01dca41002 2 * @file
donatien 0:8e01dca41002 3 * Common functions used throughout the stack.
donatien 0:8e01dca41002 4 *
donatien 0:8e01dca41002 5 */
donatien 0:8e01dca41002 6
donatien 0:8e01dca41002 7 /*
donatien 0:8e01dca41002 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
donatien 0:8e01dca41002 9 * All rights reserved.
donatien 0:8e01dca41002 10 *
donatien 0:8e01dca41002 11 * Redistribution and use in source and binary forms, with or without modification,
donatien 0:8e01dca41002 12 * are permitted provided that the following conditions are met:
donatien 0:8e01dca41002 13 *
donatien 0:8e01dca41002 14 * 1. Redistributions of source code must retain the above copyright notice,
donatien 0:8e01dca41002 15 * this list of conditions and the following disclaimer.
donatien 0:8e01dca41002 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
donatien 0:8e01dca41002 17 * this list of conditions and the following disclaimer in the documentation
donatien 0:8e01dca41002 18 * and/or other materials provided with the distribution.
donatien 0:8e01dca41002 19 * 3. The name of the author may not be used to endorse or promote products
donatien 0:8e01dca41002 20 * derived from this software without specific prior written permission.
donatien 0:8e01dca41002 21 *
donatien 0:8e01dca41002 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
donatien 0:8e01dca41002 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
donatien 0:8e01dca41002 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
donatien 0:8e01dca41002 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
donatien 0:8e01dca41002 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
donatien 0:8e01dca41002 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
donatien 0:8e01dca41002 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
donatien 0:8e01dca41002 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
donatien 0:8e01dca41002 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
donatien 0:8e01dca41002 31 * OF SUCH DAMAGE.
donatien 0:8e01dca41002 32 *
donatien 0:8e01dca41002 33 * This file is part of the lwIP TCP/IP stack.
donatien 0:8e01dca41002 34 *
donatien 0:8e01dca41002 35 * Author: Simon Goldschmidt
donatien 0:8e01dca41002 36 *
donatien 0:8e01dca41002 37 */
donatien 0:8e01dca41002 38
donatien 0:8e01dca41002 39 #include "lwip/opt.h"
donatien 0:8e01dca41002 40 #include "lwip/def.h"
donatien 0:8e01dca41002 41
donatien 0:8e01dca41002 42 /**
donatien 0:8e01dca41002 43 * These are reference implementations of the byte swapping functions.
donatien 0:8e01dca41002 44 * Again with the aim of being simple, correct and fully portable.
donatien 0:8e01dca41002 45 * Byte swapping is the second thing you would want to optimize. You will
donatien 0:8e01dca41002 46 * need to port it to your architecture and in your cc.h:
donatien 0:8e01dca41002 47 *
donatien 0:8e01dca41002 48 * #define LWIP_PLATFORM_BYTESWAP 1
donatien 0:8e01dca41002 49 * #define LWIP_PLATFORM_HTONS(x) <your_htons>
donatien 0:8e01dca41002 50 * #define LWIP_PLATFORM_HTONL(x) <your_htonl>
donatien 0:8e01dca41002 51 *
donatien 0:8e01dca41002 52 * Note ntohs() and ntohl() are merely references to the htonx counterparts.
donatien 0:8e01dca41002 53 */
donatien 0:8e01dca41002 54
donatien 0:8e01dca41002 55 #if (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN)
donatien 0:8e01dca41002 56
donatien 0:8e01dca41002 57 /**
donatien 0:8e01dca41002 58 * Convert an u16_t from host- to network byte order.
donatien 0:8e01dca41002 59 *
donatien 0:8e01dca41002 60 * @param n u16_t in host byte order
donatien 0:8e01dca41002 61 * @return n in network byte order
donatien 0:8e01dca41002 62 */
donatien 0:8e01dca41002 63 u16_t
donatien 0:8e01dca41002 64 lwip_htons(u16_t n)
donatien 0:8e01dca41002 65 {
donatien 0:8e01dca41002 66 return ((n & 0xff) << 8) | ((n & 0xff00) >> 8);
donatien 0:8e01dca41002 67 }
donatien 0:8e01dca41002 68
donatien 0:8e01dca41002 69 /**
donatien 0:8e01dca41002 70 * Convert an u16_t from network- to host byte order.
donatien 0:8e01dca41002 71 *
donatien 0:8e01dca41002 72 * @param n u16_t in network byte order
donatien 0:8e01dca41002 73 * @return n in host byte order
donatien 0:8e01dca41002 74 */
donatien 0:8e01dca41002 75 u16_t
donatien 0:8e01dca41002 76 lwip_ntohs(u16_t n)
donatien 0:8e01dca41002 77 {
donatien 0:8e01dca41002 78 return lwip_htons(n);
donatien 0:8e01dca41002 79 }
donatien 0:8e01dca41002 80
donatien 0:8e01dca41002 81 /**
donatien 0:8e01dca41002 82 * Convert an u32_t from host- to network byte order.
donatien 0:8e01dca41002 83 *
donatien 0:8e01dca41002 84 * @param n u32_t in host byte order
donatien 0:8e01dca41002 85 * @return n in network byte order
donatien 0:8e01dca41002 86 */
donatien 0:8e01dca41002 87 u32_t
donatien 0:8e01dca41002 88 lwip_htonl(u32_t n)
donatien 0:8e01dca41002 89 {
donatien 0:8e01dca41002 90 return ((n & 0xff) << 24) |
donatien 0:8e01dca41002 91 ((n & 0xff00) << 8) |
donatien 0:8e01dca41002 92 ((n & 0xff0000UL) >> 8) |
donatien 0:8e01dca41002 93 ((n & 0xff000000UL) >> 24);
donatien 0:8e01dca41002 94 }
donatien 0:8e01dca41002 95
donatien 0:8e01dca41002 96 /**
donatien 0:8e01dca41002 97 * Convert an u32_t from network- to host byte order.
donatien 0:8e01dca41002 98 *
donatien 0:8e01dca41002 99 * @param n u32_t in network byte order
donatien 0:8e01dca41002 100 * @return n in host byte order
donatien 0:8e01dca41002 101 */
donatien 0:8e01dca41002 102 u32_t
donatien 0:8e01dca41002 103 lwip_ntohl(u32_t n)
donatien 0:8e01dca41002 104 {
donatien 0:8e01dca41002 105 return lwip_htonl(n);
donatien 0:8e01dca41002 106 }
donatien 0:8e01dca41002 107
donatien 0:8e01dca41002 108 #endif /* (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN) */