Adam Green / EthernetInterface

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lwip/include/ipv4/lwip/inet_chksum.h@0:3b00827bb0b7, 2013-09-07 (annotated)

Committer:
AdamGreen
Date:
Sat Sep 07 21:38:42 2013 +0000
Revision:
0:3b00827bb0b7
Sync to latest network stack source from github.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AdamGreen 0:3b00827bb0b7 1 /*
AdamGreen 0:3b00827bb0b7 2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
AdamGreen 0:3b00827bb0b7 3 * All rights reserved.
AdamGreen 0:3b00827bb0b7 4 *
AdamGreen 0:3b00827bb0b7 5 * Redistribution and use in source and binary forms, with or without modification,
AdamGreen 0:3b00827bb0b7 6 * are permitted provided that the following conditions are met:
AdamGreen 0:3b00827bb0b7 7 *
AdamGreen 0:3b00827bb0b7 8 * 1. Redistributions of source code must retain the above copyright notice,
AdamGreen 0:3b00827bb0b7 9 * this list of conditions and the following disclaimer.
AdamGreen 0:3b00827bb0b7 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
AdamGreen 0:3b00827bb0b7 11 * this list of conditions and the following disclaimer in the documentation
AdamGreen 0:3b00827bb0b7 12 * and/or other materials provided with the distribution.
AdamGreen 0:3b00827bb0b7 13 * 3. The name of the author may not be used to endorse or promote products
AdamGreen 0:3b00827bb0b7 14 * derived from this software without specific prior written permission.
AdamGreen 0:3b00827bb0b7 15 *
AdamGreen 0:3b00827bb0b7 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
AdamGreen 0:3b00827bb0b7 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
AdamGreen 0:3b00827bb0b7 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
AdamGreen 0:3b00827bb0b7 19 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
AdamGreen 0:3b00827bb0b7 20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
AdamGreen 0:3b00827bb0b7 21 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
AdamGreen 0:3b00827bb0b7 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
AdamGreen 0:3b00827bb0b7 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
AdamGreen 0:3b00827bb0b7 24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
AdamGreen 0:3b00827bb0b7 25 * OF SUCH DAMAGE.
AdamGreen 0:3b00827bb0b7 26 *
AdamGreen 0:3b00827bb0b7 27 * This file is part of the lwIP TCP/IP stack.
AdamGreen 0:3b00827bb0b7 28 *
AdamGreen 0:3b00827bb0b7 29 * Author: Adam Dunkels <adam@sics.se>
AdamGreen 0:3b00827bb0b7 30 *
AdamGreen 0:3b00827bb0b7 31 */
AdamGreen 0:3b00827bb0b7 32 #ifndef __LWIP_INET_CHKSUM_H__
AdamGreen 0:3b00827bb0b7 33 #define __LWIP_INET_CHKSUM_H__
AdamGreen 0:3b00827bb0b7 34
AdamGreen 0:3b00827bb0b7 35 #include "lwip/opt.h"
AdamGreen 0:3b00827bb0b7 36
AdamGreen 0:3b00827bb0b7 37 #include "lwip/pbuf.h"
AdamGreen 0:3b00827bb0b7 38 #include "lwip/ip_addr.h"
AdamGreen 0:3b00827bb0b7 39
AdamGreen 0:3b00827bb0b7 40 /** Swap the bytes in an u16_t: much like htons() for little-endian */
AdamGreen 0:3b00827bb0b7 41 #ifndef SWAP_BYTES_IN_WORD
AdamGreen 0:3b00827bb0b7 42 #if LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)
AdamGreen 0:3b00827bb0b7 43 /* little endian and PLATFORM_BYTESWAP defined */
AdamGreen 0:3b00827bb0b7 44 #define SWAP_BYTES_IN_WORD(w) LWIP_PLATFORM_HTONS(w)
AdamGreen 0:3b00827bb0b7 45 #else /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN) */
AdamGreen 0:3b00827bb0b7 46 /* can't use htons on big endian (or PLATFORM_BYTESWAP not defined)... */
AdamGreen 0:3b00827bb0b7 47 #define SWAP_BYTES_IN_WORD(w) (((w) & 0xff) << 8) | (((w) & 0xff00) >> 8)
AdamGreen 0:3b00827bb0b7 48 #endif /* LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)*/
AdamGreen 0:3b00827bb0b7 49 #endif /* SWAP_BYTES_IN_WORD */
AdamGreen 0:3b00827bb0b7 50
AdamGreen 0:3b00827bb0b7 51 /** Split an u32_t in two u16_ts and add them up */
AdamGreen 0:3b00827bb0b7 52 #ifndef FOLD_U32T
AdamGreen 0:3b00827bb0b7 53 #define FOLD_U32T(u) (((u) >> 16) + ((u) & 0x0000ffffUL))
AdamGreen 0:3b00827bb0b7 54 #endif
AdamGreen 0:3b00827bb0b7 55
AdamGreen 0:3b00827bb0b7 56 #if LWIP_CHECKSUM_ON_COPY
AdamGreen 0:3b00827bb0b7 57 /** Function-like macro: same as MEMCPY but returns the checksum of copied data
AdamGreen 0:3b00827bb0b7 58 as u16_t */
AdamGreen 0:3b00827bb0b7 59 #ifndef LWIP_CHKSUM_COPY
AdamGreen 0:3b00827bb0b7 60 #define LWIP_CHKSUM_COPY(dst, src, len) lwip_chksum_copy(dst, src, len)
AdamGreen 0:3b00827bb0b7 61 #ifndef LWIP_CHKSUM_COPY_ALGORITHM
AdamGreen 0:3b00827bb0b7 62 #define LWIP_CHKSUM_COPY_ALGORITHM 1
AdamGreen 0:3b00827bb0b7 63 #endif /* LWIP_CHKSUM_COPY_ALGORITHM */
AdamGreen 0:3b00827bb0b7 64 #endif /* LWIP_CHKSUM_COPY */
AdamGreen 0:3b00827bb0b7 65 #else /* LWIP_CHECKSUM_ON_COPY */
AdamGreen 0:3b00827bb0b7 66 #define LWIP_CHKSUM_COPY_ALGORITHM 0
AdamGreen 0:3b00827bb0b7 67 #endif /* LWIP_CHECKSUM_ON_COPY */
AdamGreen 0:3b00827bb0b7 68
AdamGreen 0:3b00827bb0b7 69 #ifdef __cplusplus
AdamGreen 0:3b00827bb0b7 70 extern "C" {
AdamGreen 0:3b00827bb0b7 71 #endif
AdamGreen 0:3b00827bb0b7 72
AdamGreen 0:3b00827bb0b7 73 u16_t inet_chksum(void *dataptr, u16_t len);
AdamGreen 0:3b00827bb0b7 74 u16_t inet_chksum_pbuf(struct pbuf *p);
AdamGreen 0:3b00827bb0b7 75 u16_t inet_chksum_pseudo(struct pbuf *p,
AdamGreen 0:3b00827bb0b7 76 ip_addr_t *src, ip_addr_t *dest,
AdamGreen 0:3b00827bb0b7 77 u8_t proto, u16_t proto_len);
AdamGreen 0:3b00827bb0b7 78 u16_t inet_chksum_pseudo_partial(struct pbuf *p,
AdamGreen 0:3b00827bb0b7 79 ip_addr_t *src, ip_addr_t *dest,
AdamGreen 0:3b00827bb0b7 80 u8_t proto, u16_t proto_len, u16_t chksum_len);
AdamGreen 0:3b00827bb0b7 81 #if LWIP_CHKSUM_COPY_ALGORITHM
AdamGreen 0:3b00827bb0b7 82 u16_t lwip_chksum_copy(void *dst, const void *src, u16_t len);
AdamGreen 0:3b00827bb0b7 83 #endif /* LWIP_CHKSUM_COPY_ALGORITHM */
AdamGreen 0:3b00827bb0b7 84
AdamGreen 0:3b00827bb0b7 85 #ifdef __cplusplus
AdamGreen 0:3b00827bb0b7 86 }
AdamGreen 0:3b00827bb0b7 87 #endif
AdamGreen 0:3b00827bb0b7 88
AdamGreen 0:3b00827bb0b7 89 #endif /* __LWIP_INET_H__ */
AdamGreen 0:3b00827bb0b7 90