Yihui Xiong / lwip-arch-max-dev

dev

Dependents:   EthernetInterface

Fork of lwip by mbed official

include/ipv4/lwip/inet_chksum.h@19:6c91d95ef874, 2015-03-02 (annotated)

Committer:
yihui
Date:
Mon Mar 02 08:19:15 2015 +0000
Revision:
19:6c91d95ef874
Parent:
0:51ac1d130fd4 
minor changes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:51ac1d130fd4 1 /*
mbed_official 0:51ac1d130fd4 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
mbed_official 0:51ac1d130fd4 3 * All rights reserved.
mbed_official 0:51ac1d130fd4 4 *
mbed_official 0:51ac1d130fd4 5 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 0:51ac1d130fd4 6 * are permitted provided that the following conditions are met:
mbed_official 0:51ac1d130fd4 7 *
mbed_official 0:51ac1d130fd4 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 0:51ac1d130fd4 9 * this list of conditions and the following disclaimer.
mbed_official 0:51ac1d130fd4 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 0:51ac1d130fd4 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 0:51ac1d130fd4 12 * and/or other materials provided with the distribution.
mbed_official 0:51ac1d130fd4 13 * 3. The name of the author may not be used to endorse or promote products
mbed_official 0:51ac1d130fd4 14 * derived from this software without specific prior written permission.
mbed_official 0:51ac1d130fd4 15 *
mbed_official 0:51ac1d130fd4 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
mbed_official 0:51ac1d130fd4 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
mbed_official 0:51ac1d130fd4 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
mbed_official 0:51ac1d130fd4 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
mbed_official 0:51ac1d130fd4 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
mbed_official 0:51ac1d130fd4 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 0:51ac1d130fd4 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 0:51ac1d130fd4 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
mbed_official 0:51ac1d130fd4 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
mbed_official 0:51ac1d130fd4 25 * OF SUCH DAMAGE.
mbed_official 0:51ac1d130fd4 26 *
mbed_official 0:51ac1d130fd4 27 * This file is part of the lwIP TCP/IP stack.
mbed_official 0:51ac1d130fd4 28 *
mbed_official 0:51ac1d130fd4 29 * Author: Adam Dunkels <adam@sics.se>
mbed_official 0:51ac1d130fd4 30 *
mbed_official 0:51ac1d130fd4 31 */
mbed_official 0:51ac1d130fd4 32 #ifndef __LWIP_INET_CHKSUM_H__
mbed_official 0:51ac1d130fd4 33 #define __LWIP_INET_CHKSUM_H__
mbed_official 0:51ac1d130fd4 34
mbed_official 0:51ac1d130fd4 35 #include "lwip/opt.h"
mbed_official 0:51ac1d130fd4 36
mbed_official 0:51ac1d130fd4 37 #include "lwip/pbuf.h"
mbed_official 0:51ac1d130fd4 38 #include "lwip/ip_addr.h"
mbed_official 0:51ac1d130fd4 39
mbed_official 0:51ac1d130fd4 40 /** Swap the bytes in an u16_t: much like htons() for little-endian */
mbed_official 0:51ac1d130fd4 41 #ifndef SWAP_BYTES_IN_WORD
mbed_official 0:51ac1d130fd4 42 #if LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)
mbed_official 0:51ac1d130fd4 43 /* little endian and PLATFORM_BYTESWAP defined */
mbed_official 0:51ac1d130fd4 44 #define SWAP_BYTES_IN_WORD(w) LWIP_PLATFORM_HTONS(w)
mbed_official 0:51ac1d130fd4 45 #else /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN) */
mbed_official 0:51ac1d130fd4 46 /* can't use htons on big endian (or PLATFORM_BYTESWAP not defined)... */
mbed_official 0:51ac1d130fd4 47 #define SWAP_BYTES_IN_WORD(w) (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8)
mbed_official 0:51ac1d130fd4 48 #endif /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)*/
mbed_official 0:51ac1d130fd4 49 #endif /* SWAP_BYTES_IN_WORD */
mbed_official 0:51ac1d130fd4 50
mbed_official 0:51ac1d130fd4 51 /** Split an u32_t in two u16_ts and add them up */
mbed_official 0:51ac1d130fd4 52 #ifndef FOLD_U32T
mbed_official 0:51ac1d130fd4 53 #define FOLD_U32T(u) (((u) >> 16) + ((u) & 0x0000ffffUL))
mbed_official 0:51ac1d130fd4 54 #endif
mbed_official 0:51ac1d130fd4 55
mbed_official 0:51ac1d130fd4 56 #if LWIP_CHECKSUM_ON_COPY
mbed_official 0:51ac1d130fd4 57 /** Function-like macro: same as MEMCPY but returns the checksum of copied data
mbed_official 0:51ac1d130fd4 58 as u16_t */
mbed_official 0:51ac1d130fd4 59 #ifndef LWIP_CHKSUM_COPY
mbed_official 0:51ac1d130fd4 60 #define LWIP_CHKSUM_COPY(dst, src, len) lwip_chksum_copy(dst, src, len)
mbed_official 0:51ac1d130fd4 61 #ifndef LWIP_CHKSUM_COPY_ALGORITHM
mbed_official 0:51ac1d130fd4 62 #define LWIP_CHKSUM_COPY_ALGORITHM 1
mbed_official 0:51ac1d130fd4 63 #endif /* LWIP_CHKSUM_COPY_ALGORITHM */
mbed_official 0:51ac1d130fd4 64 #endif /* LWIP_CHKSUM_COPY */
mbed_official 0:51ac1d130fd4 65 #else /* LWIP_CHECKSUM_ON_COPY */
mbed_official 0:51ac1d130fd4 66 #define LWIP_CHKSUM_COPY_ALGORITHM 0
mbed_official 0:51ac1d130fd4 67 #endif /* LWIP_CHECKSUM_ON_COPY */
mbed_official 0:51ac1d130fd4 68
mbed_official 0:51ac1d130fd4 69 #ifdef __cplusplus
mbed_official 0:51ac1d130fd4 70 extern "C" {
mbed_official 0:51ac1d130fd4 71 #endif
mbed_official 0:51ac1d130fd4 72
mbed_official 0:51ac1d130fd4 73 u16_t inet_chksum(void *dataptr, u16_t len);
mbed_official 0:51ac1d130fd4 74 u16_t inet_chksum_pbuf(struct pbuf *p);
mbed_official 0:51ac1d130fd4 75 u16_t inet_chksum_pseudo(struct pbuf *p,
mbed_official 0:51ac1d130fd4 76 ip_addr_t *src, ip_addr_t *dest,
mbed_official 0:51ac1d130fd4 77 u8_t proto, u16_t proto_len);
mbed_official 0:51ac1d130fd4 78 u16_t inet_chksum_pseudo_partial(struct pbuf *p,
mbed_official 0:51ac1d130fd4 79 ip_addr_t *src, ip_addr_t *dest,
mbed_official 0:51ac1d130fd4 80 u8_t proto, u16_t proto_len, u16_t chksum_len);
mbed_official 0:51ac1d130fd4 81 #if LWIP_CHKSUM_COPY_ALGORITHM
mbed_official 0:51ac1d130fd4 82 u16_t lwip_chksum_copy(void *dst, const void *src, u16_t len);
mbed_official 0:51ac1d130fd4 83 #endif /* LWIP_CHKSUM_COPY_ALGORITHM */
mbed_official 0:51ac1d130fd4 84
mbed_official 0:51ac1d130fd4 85 #ifdef __cplusplus
mbed_official 0:51ac1d130fd4 86 }
mbed_official 0:51ac1d130fd4 87 #endif
mbed_official 0:51ac1d130fd4 88
mbed_official 0:51ac1d130fd4 89 #endif /* __LWIP_INET_H__ */
mbed_official 0:51ac1d130fd4 90