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Dependencies:   C027_Support IBMIoTClientCellularExample MQTT mbed

Fork of MQTT-GSM-GPS-CAN-SMS by Babu Alikapati

EthernetInterface/lwip/include/ipv4/lwip/inet_chksum.h@6:37b6d0d56190, 2014-08-20 (annotated)

Committer:
samdanbury
Date:
Wed Aug 20 12:45:14 2014 +0000
Revision:
6:37b6d0d56190
Code completely changed to improve the structure, flow and memory usage of the application

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samdanbury 6:37b6d0d56190 1 /*
samdanbury 6:37b6d0d56190 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
samdanbury 6:37b6d0d56190 3 * All rights reserved.
samdanbury 6:37b6d0d56190 4 *
samdanbury 6:37b6d0d56190 5 * Redistribution and use in source and binary forms, with or without modification,
samdanbury 6:37b6d0d56190 6 * are permitted provided that the following conditions are met:
samdanbury 6:37b6d0d56190 7 *
samdanbury 6:37b6d0d56190 8 * 1. Redistributions of source code must retain the above copyright notice,
samdanbury 6:37b6d0d56190 9 * this list of conditions and the following disclaimer.
samdanbury 6:37b6d0d56190 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
samdanbury 6:37b6d0d56190 11 * this list of conditions and the following disclaimer in the documentation
samdanbury 6:37b6d0d56190 12 * and/or other materials provided with the distribution.
samdanbury 6:37b6d0d56190 13 * 3. The name of the author may not be used to endorse or promote products
samdanbury 6:37b6d0d56190 14 * derived from this software without specific prior written permission.
samdanbury 6:37b6d0d56190 15 *
samdanbury 6:37b6d0d56190 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
samdanbury 6:37b6d0d56190 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
samdanbury 6:37b6d0d56190 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
samdanbury 6:37b6d0d56190 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
samdanbury 6:37b6d0d56190 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
samdanbury 6:37b6d0d56190 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
samdanbury 6:37b6d0d56190 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
samdanbury 6:37b6d0d56190 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
samdanbury 6:37b6d0d56190 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
samdanbury 6:37b6d0d56190 25 * OF SUCH DAMAGE.
samdanbury 6:37b6d0d56190 26 *
samdanbury 6:37b6d0d56190 27 * This file is part of the lwIP TCP/IP stack.
samdanbury 6:37b6d0d56190 28 *
samdanbury 6:37b6d0d56190 29 * Author: Adam Dunkels <adam@sics.se>
samdanbury 6:37b6d0d56190 30 *
samdanbury 6:37b6d0d56190 31 */
samdanbury 6:37b6d0d56190 32 #ifndef __LWIP_INET_CHKSUM_H__
samdanbury 6:37b6d0d56190 33 #define __LWIP_INET_CHKSUM_H__
samdanbury 6:37b6d0d56190 34
samdanbury 6:37b6d0d56190 35 #include "lwip/opt.h"
samdanbury 6:37b6d0d56190 36
samdanbury 6:37b6d0d56190 37 #include "lwip/pbuf.h"
samdanbury 6:37b6d0d56190 38 #include "lwip/ip_addr.h"
samdanbury 6:37b6d0d56190 39
samdanbury 6:37b6d0d56190 40 /** Swap the bytes in an u16_t: much like htons() for little-endian */
samdanbury 6:37b6d0d56190 41 #ifndef SWAP_BYTES_IN_WORD
samdanbury 6:37b6d0d56190 42 #if LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)
samdanbury 6:37b6d0d56190 43 /* little endian and PLATFORM_BYTESWAP defined */
samdanbury 6:37b6d0d56190 44 #define SWAP_BYTES_IN_WORD(w) LWIP_PLATFORM_HTONS(w)
samdanbury 6:37b6d0d56190 45 #else /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN) */
samdanbury 6:37b6d0d56190 46 /* can't use htons on big endian (or PLATFORM_BYTESWAP not defined)... */
samdanbury 6:37b6d0d56190 47 #define SWAP_BYTES_IN_WORD(w) (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8)
samdanbury 6:37b6d0d56190 48 #endif /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)*/
samdanbury 6:37b6d0d56190 49 #endif /* SWAP_BYTES_IN_WORD */
samdanbury 6:37b6d0d56190 50
samdanbury 6:37b6d0d56190 51 /** Split an u32_t in two u16_ts and add them up */
samdanbury 6:37b6d0d56190 52 #ifndef FOLD_U32T
samdanbury 6:37b6d0d56190 53 #define FOLD_U32T(u) (((u) >> 16) + ((u) & 0x0000ffffUL))
samdanbury 6:37b6d0d56190 54 #endif
samdanbury 6:37b6d0d56190 55
samdanbury 6:37b6d0d56190 56 #if LWIP_CHECKSUM_ON_COPY
samdanbury 6:37b6d0d56190 57 /** Function-like macro: same as MEMCPY but returns the checksum of copied data
samdanbury 6:37b6d0d56190 58 as u16_t */
samdanbury 6:37b6d0d56190 59 #ifndef LWIP_CHKSUM_COPY
samdanbury 6:37b6d0d56190 60 #define LWIP_CHKSUM_COPY(dst, src, len) lwip_chksum_copy(dst, src, len)
samdanbury 6:37b6d0d56190 61 #ifndef LWIP_CHKSUM_COPY_ALGORITHM
samdanbury 6:37b6d0d56190 62 #define LWIP_CHKSUM_COPY_ALGORITHM 1
samdanbury 6:37b6d0d56190 63 #endif /* LWIP_CHKSUM_COPY_ALGORITHM */
samdanbury 6:37b6d0d56190 64 #endif /* LWIP_CHKSUM_COPY */
samdanbury 6:37b6d0d56190 65 #else /* LWIP_CHECKSUM_ON_COPY */
samdanbury 6:37b6d0d56190 66 #define LWIP_CHKSUM_COPY_ALGORITHM 0
samdanbury 6:37b6d0d56190 67 #endif /* LWIP_CHECKSUM_ON_COPY */
samdanbury 6:37b6d0d56190 68
samdanbury 6:37b6d0d56190 69 #ifdef __cplusplus
samdanbury 6:37b6d0d56190 70 extern "C" {
samdanbury 6:37b6d0d56190 71 #endif
samdanbury 6:37b6d0d56190 72
samdanbury 6:37b6d0d56190 73 u16_t inet_chksum(void *dataptr, u16_t len);
samdanbury 6:37b6d0d56190 74 u16_t inet_chksum_pbuf(struct pbuf *p);
samdanbury 6:37b6d0d56190 75 u16_t inet_chksum_pseudo(struct pbuf *p,
samdanbury 6:37b6d0d56190 76 ip_addr_t *src, ip_addr_t *dest,
samdanbury 6:37b6d0d56190 77 u8_t proto, u16_t proto_len);
samdanbury 6:37b6d0d56190 78 u16_t inet_chksum_pseudo_partial(struct pbuf *p,
samdanbury 6:37b6d0d56190 79 ip_addr_t *src, ip_addr_t *dest,
samdanbury 6:37b6d0d56190 80 u8_t proto, u16_t proto_len, u16_t chksum_len);
samdanbury 6:37b6d0d56190 81 #if LWIP_CHKSUM_COPY_ALGORITHM
samdanbury 6:37b6d0d56190 82 u16_t lwip_chksum_copy(void *dst, const void *src, u16_t len);
samdanbury 6:37b6d0d56190 83 #endif /* LWIP_CHKSUM_COPY_ALGORITHM */
samdanbury 6:37b6d0d56190 84
samdanbury 6:37b6d0d56190 85 #ifdef __cplusplus
samdanbury 6:37b6d0d56190 86 }
samdanbury 6:37b6d0d56190 87 #endif
samdanbury 6:37b6d0d56190 88
samdanbury 6:37b6d0d56190 89 #endif /* __LWIP_INET_H__ */
samdanbury 6:37b6d0d56190 90