Pranav Sawant / EthernetNetIf

12Oct2012MbedLab

Dependents:   Lab3_VoiceMeter

Fork of EthernetNetIf by Donatien Garnier

LPC1768/lwip/include/ipv4/lwip/inet_chksum.h@6:22ce63eddd2b, 2012-10-12 (annotated)

Committer:
psawant9
Date:
Fri Oct 12 16:02:00 2012 +0000
Revision:
6:22ce63eddd2b
Parent:
0:422060928e37 
Done

Who changed what in which revision?

UserRevisionLine numberNew contents of line
psawant9 6:22ce63eddd2b 1 /*
psawant9 6:22ce63eddd2b 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
psawant9 6:22ce63eddd2b 3 * All rights reserved.
psawant9 6:22ce63eddd2b 4 *
psawant9 6:22ce63eddd2b 5 * Redistribution and use in source and binary forms, with or without modification,
psawant9 6:22ce63eddd2b 6 * are permitted provided that the following conditions are met:
psawant9 6:22ce63eddd2b 7 *
psawant9 6:22ce63eddd2b 8 * 1. Redistributions of source code must retain the above copyright notice,
psawant9 6:22ce63eddd2b 9 * this list of conditions and the following disclaimer.
psawant9 6:22ce63eddd2b 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
psawant9 6:22ce63eddd2b 11 * this list of conditions and the following disclaimer in the documentation
psawant9 6:22ce63eddd2b 12 * and/or other materials provided with the distribution.
psawant9 6:22ce63eddd2b 13 * 3. The name of the author may not be used to endorse or promote products
psawant9 6:22ce63eddd2b 14 * derived from this software without specific prior written permission.
psawant9 6:22ce63eddd2b 15 *
psawant9 6:22ce63eddd2b 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
psawant9 6:22ce63eddd2b 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
psawant9 6:22ce63eddd2b 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
psawant9 6:22ce63eddd2b 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
psawant9 6:22ce63eddd2b 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
psawant9 6:22ce63eddd2b 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
psawant9 6:22ce63eddd2b 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
psawant9 6:22ce63eddd2b 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
psawant9 6:22ce63eddd2b 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
psawant9 6:22ce63eddd2b 25 * OF SUCH DAMAGE.
psawant9 6:22ce63eddd2b 26 *
psawant9 6:22ce63eddd2b 27 * This file is part of the lwIP TCP/IP stack.
psawant9 6:22ce63eddd2b 28 *
psawant9 6:22ce63eddd2b 29 * Author: Adam Dunkels <adam@sics.se>
psawant9 6:22ce63eddd2b 30 *
psawant9 6:22ce63eddd2b 31 */
psawant9 6:22ce63eddd2b 32 #ifndef __LWIP_INET_CHKSUM_H__
psawant9 6:22ce63eddd2b 33 #define __LWIP_INET_CHKSUM_H__
psawant9 6:22ce63eddd2b 34
psawant9 6:22ce63eddd2b 35 #include "lwip/opt.h"
psawant9 6:22ce63eddd2b 36
psawant9 6:22ce63eddd2b 37 #include "lwip/pbuf.h"
psawant9 6:22ce63eddd2b 38 #include "lwip/ip_addr.h"
psawant9 6:22ce63eddd2b 39
psawant9 6:22ce63eddd2b 40 /** Swap the bytes in an u16_t: much like htons() for little-endian */
psawant9 6:22ce63eddd2b 41 #ifndef SWAP_BYTES_IN_WORD
psawant9 6:22ce63eddd2b 42 #if LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)
psawant9 6:22ce63eddd2b 43 /* little endian and PLATFORM_BYTESWAP defined */
psawant9 6:22ce63eddd2b 44 #define SWAP_BYTES_IN_WORD(w) LWIP_PLATFORM_HTONS(w)
psawant9 6:22ce63eddd2b 45 #else /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN) */
psawant9 6:22ce63eddd2b 46 /* can't use htons on big endian (or PLATFORM_BYTESWAP not defined)... */
psawant9 6:22ce63eddd2b 47 #define SWAP_BYTES_IN_WORD(w) (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8)
psawant9 6:22ce63eddd2b 48 #endif /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)*/
psawant9 6:22ce63eddd2b 49 #endif /* SWAP_BYTES_IN_WORD */
psawant9 6:22ce63eddd2b 50
psawant9 6:22ce63eddd2b 51 /** Split an u32_t in two u16_ts and add them up */
psawant9 6:22ce63eddd2b 52 #ifndef FOLD_U32T
psawant9 6:22ce63eddd2b 53 #define FOLD_U32T(u) (((u) >> 16) + ((u) & 0x0000ffffUL))
psawant9 6:22ce63eddd2b 54 #endif
psawant9 6:22ce63eddd2b 55
psawant9 6:22ce63eddd2b 56 #if LWIP_CHECKSUM_ON_COPY
psawant9 6:22ce63eddd2b 57 /** Function-like macro: same as MEMCPY but returns the checksum of copied data
psawant9 6:22ce63eddd2b 58 as u16_t */
psawant9 6:22ce63eddd2b 59 #ifndef LWIP_CHKSUM_COPY
psawant9 6:22ce63eddd2b 60 #define LWIP_CHKSUM_COPY(dst, src, len) lwip_chksum_copy(dst, src, len)
psawant9 6:22ce63eddd2b 61 #ifndef LWIP_CHKSUM_COPY_ALGORITHM
psawant9 6:22ce63eddd2b 62 #define LWIP_CHKSUM_COPY_ALGORITHM 1
psawant9 6:22ce63eddd2b 63 #endif /* LWIP_CHKSUM_COPY_ALGORITHM */
psawant9 6:22ce63eddd2b 64 #endif /* LWIP_CHKSUM_COPY */
psawant9 6:22ce63eddd2b 65 #else /* LWIP_CHECKSUM_ON_COPY */
psawant9 6:22ce63eddd2b 66 #define LWIP_CHKSUM_COPY_ALGORITHM 0
psawant9 6:22ce63eddd2b 67 #endif /* LWIP_CHECKSUM_ON_COPY */
psawant9 6:22ce63eddd2b 68
psawant9 6:22ce63eddd2b 69 #ifdef __cplusplus
psawant9 6:22ce63eddd2b 70 extern "C" {
psawant9 6:22ce63eddd2b 71 #endif
psawant9 6:22ce63eddd2b 72
psawant9 6:22ce63eddd2b 73 u16_t inet_chksum(void *dataptr, u16_t len);
psawant9 6:22ce63eddd2b 74 u16_t inet_chksum_pbuf(struct pbuf *p);
psawant9 6:22ce63eddd2b 75 u16_t inet_chksum_pseudo(struct pbuf *p,
psawant9 6:22ce63eddd2b 76 ip_addr_t *src, ip_addr_t *dest,
psawant9 6:22ce63eddd2b 77 u8_t proto, u16_t proto_len);
psawant9 6:22ce63eddd2b 78 u16_t inet_chksum_pseudo_partial(struct pbuf *p,
psawant9 6:22ce63eddd2b 79 ip_addr_t *src, ip_addr_t *dest,
psawant9 6:22ce63eddd2b 80 u8_t proto, u16_t proto_len, u16_t chksum_len);
psawant9 6:22ce63eddd2b 81 #if LWIP_CHKSUM_COPY_ALGORITHM
psawant9 6:22ce63eddd2b 82 u16_t lwip_chksum_copy(void *dst, const void *src, u16_t len);
psawant9 6:22ce63eddd2b 83 #endif /* LWIP_CHKSUM_COPY_ALGORITHM */
psawant9 6:22ce63eddd2b 84
psawant9 6:22ce63eddd2b 85 #ifdef __cplusplus
psawant9 6:22ce63eddd2b 86 }
psawant9 6:22ce63eddd2b 87 #endif
psawant9 6:22ce63eddd2b 88
psawant9 6:22ce63eddd2b 89 #endif /* __LWIP_INET_H__ */
psawant9 6:22ce63eddd2b 90