include/lwip/inet_chksum.h

0001 /*
0002  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
0003  * All rights reserved.
0004  *
0005  * Redistribution and use in source and binary forms, with or without modification,
0006  * are permitted provided that the following conditions are met:
0007  *
0008  * 1. Redistributions of source code must retain the above copyright notice,
0009  *    this list of conditions and the following disclaimer.
0010  * 2. Redistributions in binary form must reproduce the above copyright notice,
0011  *    this list of conditions and the following disclaimer in the documentation
0012  *    and/or other materials provided with the distribution.
0013  * 3. The name of the author may not be used to endorse or promote products
0014  *    derived from this software without specific prior written permission.
0015  *
0016  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
0017  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
0018  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
0019  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
0020  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
0021  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0022  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0023  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
0024  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
0025  * OF SUCH DAMAGE.
0026  *
0027  * This file is part of the lwIP TCP/IP stack.
0028  *
0029  * Author: Adam Dunkels <adam@sics.se>
0030  *
0031  */
0032 #ifndef __LWIP_INET_CHKSUM_H__
0033 #define __LWIP_INET_CHKSUM_H__
0034
0035 #include "lwip/opt.h"
0036
0037 #include "lwip/pbuf.h"
0038 #include "lwip/ip_addr.h"
0039
0040 #ifdef __cplusplus
0041 extern "C" {
0042 #endif
0043
0044 u16_t inet_chksum(void *dataptr, u16_t len);
0045 u16_t inet_chksum_pbuf(struct pbuf *p);
0046 u16_t inet_chksum_pseudo(struct pbuf *p,
0047        struct ip_addr *src, struct ip_addr *dest,
0048        u8_t proto, u16_t proto_len);
0049 #if LWIP_UDPLITE
0050 u16_t inet_chksum_pseudo_partial(struct pbuf *p,
0051        struct ip_addr *src, struct ip_addr *dest,
0052        u8_t proto, u16_t proto_len, u16_t chksum_len);
0053 #endif
0054
0055 #ifdef __cplusplus
0056 }
0057 #endif
0058
0059 #endif /* __LWIP_INET_H__ */
0060