mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-08-11 13:54:16 -04:00
This commit is contained in:
Richard Barry
parent
014d7f5b8f
commit
22e434dfaf
134 changed files with 39468 additions and 39401 deletions
|
|
@ -1,168 +1,168 @@
|
|||
/*
|
||||
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
|
||||
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
|
||||
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
||||
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
|
||||
* OF SUCH DAMAGE.
|
||||
*
|
||||
* This file is part of the lwIP TCP/IP stack.
|
||||
*
|
||||
* Author: Adam Dunkels <adam@sics.se>
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
/* inet6.c
|
||||
*
|
||||
* Functions common to all TCP/IP modules, such as the Internet checksum and the
|
||||
* byte order functions.
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
#include "lwip/opt.h"
|
||||
|
||||
#include "lwip/def.h"
|
||||
#include "lwip/inet.h"
|
||||
|
||||
|
||||
|
||||
/* chksum:
|
||||
*
|
||||
* Sums up all 16 bit words in a memory portion. Also includes any odd byte.
|
||||
* This function is used by the other checksum functions.
|
||||
*
|
||||
* For now, this is not optimized. Must be optimized for the particular processor
|
||||
* arcitecture on which it is to run. Preferebly coded in assembler.
|
||||
*/
|
||||
|
||||
static u32_t
|
||||
chksum(void *dataptr, u16_t len)
|
||||
{
|
||||
u16_t *sdataptr = dataptr;
|
||||
u32_t acc;
|
||||
|
||||
|
||||
for(acc = 0; len > 1; len -= 2) {
|
||||
acc += *sdataptr++;
|
||||
}
|
||||
|
||||
/* add up any odd byte */
|
||||
if (len == 1) {
|
||||
acc += htons((u16_t)(*(u8_t *)dataptr) << 8);
|
||||
}
|
||||
|
||||
return acc;
|
||||
|
||||
}
|
||||
|
||||
/* inet_chksum_pseudo:
|
||||
*
|
||||
* Calculates the pseudo Internet checksum used by TCP and UDP for a pbuf chain.
|
||||
*/
|
||||
|
||||
u16_t
|
||||
inet_chksum_pseudo(struct pbuf *p,
|
||||
struct ip_addr *src, struct ip_addr *dest,
|
||||
u8_t proto, u32_t proto_len)
|
||||
{
|
||||
u32_t acc;
|
||||
struct pbuf *q;
|
||||
u8_t swapped, i;
|
||||
|
||||
acc = 0;
|
||||
swapped = 0;
|
||||
for(q = p; q != NULL; q = q->next) {
|
||||
acc += chksum(q->payload, q->len);
|
||||
while (acc >> 16) {
|
||||
acc = (acc & 0xffff) + (acc >> 16);
|
||||
}
|
||||
if (q->len % 2 != 0) {
|
||||
swapped = 1 - swapped;
|
||||
acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
|
||||
}
|
||||
}
|
||||
|
||||
if (swapped) {
|
||||
acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
|
||||
}
|
||||
|
||||
for(i = 0; i < 8; i++) {
|
||||
acc += ((u16_t *)src->addr)[i] & 0xffff;
|
||||
acc += ((u16_t *)dest->addr)[i] & 0xffff;
|
||||
while (acc >> 16) {
|
||||
acc = (acc & 0xffff) + (acc >> 16);
|
||||
}
|
||||
}
|
||||
acc += (u16_t)htons((u16_t)proto);
|
||||
acc += ((u16_t *)&proto_len)[0] & 0xffff;
|
||||
acc += ((u16_t *)&proto_len)[1] & 0xffff;
|
||||
|
||||
while (acc >> 16) {
|
||||
acc = (acc & 0xffff) + (acc >> 16);
|
||||
}
|
||||
return ~(acc & 0xffff);
|
||||
}
|
||||
|
||||
/* inet_chksum:
|
||||
*
|
||||
* Calculates the Internet checksum over a portion of memory. Used primarely for IP
|
||||
* and ICMP.
|
||||
*/
|
||||
|
||||
u16_t
|
||||
inet_chksum(void *dataptr, u16_t len)
|
||||
{
|
||||
u32_t acc, sum;
|
||||
|
||||
acc = chksum(dataptr, len);
|
||||
sum = (acc & 0xffff) + (acc >> 16);
|
||||
sum += (sum >> 16);
|
||||
return ~(sum & 0xffff);
|
||||
}
|
||||
|
||||
u16_t
|
||||
inet_chksum_pbuf(struct pbuf *p)
|
||||
{
|
||||
u32_t acc;
|
||||
struct pbuf *q;
|
||||
u8_t swapped;
|
||||
|
||||
acc = 0;
|
||||
swapped = 0;
|
||||
for(q = p; q != NULL; q = q->next) {
|
||||
acc += chksum(q->payload, q->len);
|
||||
while (acc >> 16) {
|
||||
acc = (acc & 0xffff) + (acc >> 16);
|
||||
}
|
||||
if (q->len % 2 != 0) {
|
||||
swapped = 1 - swapped;
|
||||
acc = (acc & 0xff << 8) | (acc & 0xff00 >> 8);
|
||||
}
|
||||
}
|
||||
|
||||
if (swapped) {
|
||||
acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
|
||||
}
|
||||
return ~(acc & 0xffff);
|
||||
}
|
||||
|
||||
/*
|
||||
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without modification,
|
||||
* are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
|
||||
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||||
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
|
||||
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
||||
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
|
||||
* OF SUCH DAMAGE.
|
||||
*
|
||||
* This file is part of the lwIP TCP/IP stack.
|
||||
*
|
||||
* Author: Adam Dunkels <adam@sics.se>
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
/* inet6.c
|
||||
*
|
||||
* Functions common to all TCP/IP modules, such as the Internet checksum and the
|
||||
* byte order functions.
|
||||
*
|
||||
*/
|
||||
|
||||
|
||||
#include "lwip/opt.h"
|
||||
|
||||
#include "lwip/def.h"
|
||||
#include "lwip/inet.h"
|
||||
|
||||
|
||||
|
||||
/* chksum:
|
||||
*
|
||||
* Sums up all 16 bit words in a memory portion. Also includes any odd byte.
|
||||
* This function is used by the other checksum functions.
|
||||
*
|
||||
* For now, this is not optimized. Must be optimized for the particular processor
|
||||
* arcitecture on which it is to run. Preferebly coded in assembler.
|
||||
*/
|
||||
|
||||
static u32_t
|
||||
chksum(void *dataptr, u16_t len)
|
||||
{
|
||||
u16_t *sdataptr = dataptr;
|
||||
u32_t acc;
|
||||
|
||||
|
||||
for(acc = 0; len > 1; len -= 2) {
|
||||
acc += *sdataptr++;
|
||||
}
|
||||
|
||||
/* add up any odd byte */
|
||||
if (len == 1) {
|
||||
acc += htons((u16_t)(*(u8_t *)dataptr) << 8);
|
||||
}
|
||||
|
||||
return acc;
|
||||
|
||||
}
|
||||
|
||||
/* inet_chksum_pseudo:
|
||||
*
|
||||
* Calculates the pseudo Internet checksum used by TCP and UDP for a pbuf chain.
|
||||
*/
|
||||
|
||||
u16_t
|
||||
inet_chksum_pseudo(struct pbuf *p,
|
||||
struct ip_addr *src, struct ip_addr *dest,
|
||||
u8_t proto, u32_t proto_len)
|
||||
{
|
||||
u32_t acc;
|
||||
struct pbuf *q;
|
||||
u8_t swapped, i;
|
||||
|
||||
acc = 0;
|
||||
swapped = 0;
|
||||
for(q = p; q != NULL; q = q->next) {
|
||||
acc += chksum(q->payload, q->len);
|
||||
while (acc >> 16) {
|
||||
acc = (acc & 0xffff) + (acc >> 16);
|
||||
}
|
||||
if (q->len % 2 != 0) {
|
||||
swapped = 1 - swapped;
|
||||
acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
|
||||
}
|
||||
}
|
||||
|
||||
if (swapped) {
|
||||
acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
|
||||
}
|
||||
|
||||
for(i = 0; i < 8; i++) {
|
||||
acc += ((u16_t *)src->addr)[i] & 0xffff;
|
||||
acc += ((u16_t *)dest->addr)[i] & 0xffff;
|
||||
while (acc >> 16) {
|
||||
acc = (acc & 0xffff) + (acc >> 16);
|
||||
}
|
||||
}
|
||||
acc += (u16_t)htons((u16_t)proto);
|
||||
acc += ((u16_t *)&proto_len)[0] & 0xffff;
|
||||
acc += ((u16_t *)&proto_len)[1] & 0xffff;
|
||||
|
||||
while (acc >> 16) {
|
||||
acc = (acc & 0xffff) + (acc >> 16);
|
||||
}
|
||||
return ~(acc & 0xffff);
|
||||
}
|
||||
|
||||
/* inet_chksum:
|
||||
*
|
||||
* Calculates the Internet checksum over a portion of memory. Used primarely for IP
|
||||
* and ICMP.
|
||||
*/
|
||||
|
||||
u16_t
|
||||
inet_chksum(void *dataptr, u16_t len)
|
||||
{
|
||||
u32_t acc, sum;
|
||||
|
||||
acc = chksum(dataptr, len);
|
||||
sum = (acc & 0xffff) + (acc >> 16);
|
||||
sum += (sum >> 16);
|
||||
return ~(sum & 0xffff);
|
||||
}
|
||||
|
||||
u16_t
|
||||
inet_chksum_pbuf(struct pbuf *p)
|
||||
{
|
||||
u32_t acc;
|
||||
struct pbuf *q;
|
||||
u8_t swapped;
|
||||
|
||||
acc = 0;
|
||||
swapped = 0;
|
||||
for(q = p; q != NULL; q = q->next) {
|
||||
acc += chksum(q->payload, q->len);
|
||||
while (acc >> 16) {
|
||||
acc = (acc & 0xffff) + (acc >> 16);
|
||||
}
|
||||
if (q->len % 2 != 0) {
|
||||
swapped = 1 - swapped;
|
||||
acc = (acc & 0xff << 8) | (acc & 0xff00 >> 8);
|
||||
}
|
||||
}
|
||||
|
||||
if (swapped) {
|
||||
acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
|
||||
}
|
||||
return ~(acc & 0xffff);
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue