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Dependencies:   F7_Ethernet WebSocketClient mbed mcp3008

Fork of Nucleo_F746ZG_Ethernet by Dieter Graef

F7_Ethernet/lwip/include/ipv4/lwip/inet_chksum.h@0:f9b6112278fe, 2016-06-18 (annotated)

Committer:
DieterGraef
Date:
Sat Jun 18 10:49:12 2016 +0000
Revision:
0:f9b6112278fe
Ethernet for the NUCLEO STM32F746 Board Testprogram uses DHCP and NTP to set the clock

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DieterGraef 0:f9b6112278fe 1 /*
DieterGraef 0:f9b6112278fe 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
DieterGraef 0:f9b6112278fe 3 * All rights reserved.
DieterGraef 0:f9b6112278fe 4 *
DieterGraef 0:f9b6112278fe 5 * Redistribution and use in source and binary forms, with or without modification,
DieterGraef 0:f9b6112278fe 6 * are permitted provided that the following conditions are met:
DieterGraef 0:f9b6112278fe 7 *
DieterGraef 0:f9b6112278fe 8 * 1. Redistributions of source code must retain the above copyright notice,
DieterGraef 0:f9b6112278fe 9 * this list of conditions and the following disclaimer.
DieterGraef 0:f9b6112278fe 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
DieterGraef 0:f9b6112278fe 11 * this list of conditions and the following disclaimer in the documentation
DieterGraef 0:f9b6112278fe 12 * and/or other materials provided with the distribution.
DieterGraef 0:f9b6112278fe 13 * 3. The name of the author may not be used to endorse or promote products
DieterGraef 0:f9b6112278fe 14 * derived from this software without specific prior written permission.
DieterGraef 0:f9b6112278fe 15 *
DieterGraef 0:f9b6112278fe 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
DieterGraef 0:f9b6112278fe 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
DieterGraef 0:f9b6112278fe 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
DieterGraef 0:f9b6112278fe 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
DieterGraef 0:f9b6112278fe 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
DieterGraef 0:f9b6112278fe 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
DieterGraef 0:f9b6112278fe 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
DieterGraef 0:f9b6112278fe 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
DieterGraef 0:f9b6112278fe 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
DieterGraef 0:f9b6112278fe 25 * OF SUCH DAMAGE.
DieterGraef 0:f9b6112278fe 26 *
DieterGraef 0:f9b6112278fe 27 * This file is part of the lwIP TCP/IP stack.
DieterGraef 0:f9b6112278fe 28 *
DieterGraef 0:f9b6112278fe 29 * Author: Adam Dunkels <adam@sics.se>
DieterGraef 0:f9b6112278fe 30 *
DieterGraef 0:f9b6112278fe 31 */
DieterGraef 0:f9b6112278fe 32 #ifndef __LWIP_INET_CHKSUM_H__
DieterGraef 0:f9b6112278fe 33 #define __LWIP_INET_CHKSUM_H__
DieterGraef 0:f9b6112278fe 34
DieterGraef 0:f9b6112278fe 35 #include "lwip/opt.h"
DieterGraef 0:f9b6112278fe 36
DieterGraef 0:f9b6112278fe 37 #include "lwip/pbuf.h"
DieterGraef 0:f9b6112278fe 38 #include "lwip/ip_addr.h"
DieterGraef 0:f9b6112278fe 39
DieterGraef 0:f9b6112278fe 40 /** Swap the bytes in an u16_t: much like htons() for little-endian */
DieterGraef 0:f9b6112278fe 41 #ifndef SWAP_BYTES_IN_WORD
DieterGraef 0:f9b6112278fe 42 #if LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)
DieterGraef 0:f9b6112278fe 43 /* little endian and PLATFORM_BYTESWAP defined */
DieterGraef 0:f9b6112278fe 44 #define SWAP_BYTES_IN_WORD(w) LWIP_PLATFORM_HTONS(w)
DieterGraef 0:f9b6112278fe 45 #else /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN) */
DieterGraef 0:f9b6112278fe 46 /* can't use htons on big endian (or PLATFORM_BYTESWAP not defined)... */
DieterGraef 0:f9b6112278fe 47 #define SWAP_BYTES_IN_WORD(w) (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8)
DieterGraef 0:f9b6112278fe 48 #endif /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)*/
DieterGraef 0:f9b6112278fe 49 #endif /* SWAP_BYTES_IN_WORD */
DieterGraef 0:f9b6112278fe 50
DieterGraef 0:f9b6112278fe 51 /** Split an u32_t in two u16_ts and add them up */
DieterGraef 0:f9b6112278fe 52 #ifndef FOLD_U32T
DieterGraef 0:f9b6112278fe 53 #define FOLD_U32T(u) (((u) >> 16) + ((u) & 0x0000ffffUL))
DieterGraef 0:f9b6112278fe 54 #endif
DieterGraef 0:f9b6112278fe 55
DieterGraef 0:f9b6112278fe 56 #if LWIP_CHECKSUM_ON_COPY
DieterGraef 0:f9b6112278fe 57 /** Function-like macro: same as MEMCPY but returns the checksum of copied data
DieterGraef 0:f9b6112278fe 58 as u16_t */
DieterGraef 0:f9b6112278fe 59 #ifndef LWIP_CHKSUM_COPY
DieterGraef 0:f9b6112278fe 60 #define LWIP_CHKSUM_COPY(dst, src, len) lwip_chksum_copy(dst, src, len)
DieterGraef 0:f9b6112278fe 61 #ifndef LWIP_CHKSUM_COPY_ALGORITHM
DieterGraef 0:f9b6112278fe 62 #define LWIP_CHKSUM_COPY_ALGORITHM 1
DieterGraef 0:f9b6112278fe 63 #endif /* LWIP_CHKSUM_COPY_ALGORITHM */
DieterGraef 0:f9b6112278fe 64 #endif /* LWIP_CHKSUM_COPY */
DieterGraef 0:f9b6112278fe 65 #else /* LWIP_CHECKSUM_ON_COPY */
DieterGraef 0:f9b6112278fe 66 #define LWIP_CHKSUM_COPY_ALGORITHM 0
DieterGraef 0:f9b6112278fe 67 #endif /* LWIP_CHECKSUM_ON_COPY */
DieterGraef 0:f9b6112278fe 68
DieterGraef 0:f9b6112278fe 69 #ifdef __cplusplus
DieterGraef 0:f9b6112278fe 70 extern "C" {
DieterGraef 0:f9b6112278fe 71 #endif
DieterGraef 0:f9b6112278fe 72
DieterGraef 0:f9b6112278fe 73 u16_t inet_chksum(void *dataptr, u16_t len);
DieterGraef 0:f9b6112278fe 74 u16_t inet_chksum_pbuf(struct pbuf *p);
DieterGraef 0:f9b6112278fe 75 u16_t inet_chksum_pseudo(struct pbuf *p,
DieterGraef 0:f9b6112278fe 76 ip_addr_t *src, ip_addr_t *dest,
DieterGraef 0:f9b6112278fe 77 u8_t proto, u16_t proto_len);
DieterGraef 0:f9b6112278fe 78 u16_t inet_chksum_pseudo_partial(struct pbuf *p,
DieterGraef 0:f9b6112278fe 79 ip_addr_t *src, ip_addr_t *dest,
DieterGraef 0:f9b6112278fe 80 u8_t proto, u16_t proto_len, u16_t chksum_len);
DieterGraef 0:f9b6112278fe 81 #if LWIP_CHKSUM_COPY_ALGORITHM
DieterGraef 0:f9b6112278fe 82 u16_t lwip_chksum_copy(void *dst, const void *src, u16_t len);
DieterGraef 0:f9b6112278fe 83 #endif /* LWIP_CHKSUM_COPY_ALGORITHM */
DieterGraef 0:f9b6112278fe 84
DieterGraef 0:f9b6112278fe 85 #ifdef __cplusplus
DieterGraef 0:f9b6112278fe 86 }
DieterGraef 0:f9b6112278fe 87 #endif
DieterGraef 0:f9b6112278fe 88
DieterGraef 0:f9b6112278fe 89 #endif /* __LWIP_INET_H__ */
DieterGraef 0:f9b6112278fe 90