mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-05 20:54:31 +00:00
90526e9fba
Move this header out of the common header. Network support is used in quite a few places but it still does not warrant blanket inclusion. Note that this net.h header itself has quite a lot in it. It could be split into the driver-mode support, functions, structures, checksumming, etc. Signed-off-by: Simon Glass <sjg@chromium.org>
107 lines
2 KiB
C
107 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Generic network code. Moved from net.c
|
|
*
|
|
* Copyright 1994 - 2000 Neil Russell.
|
|
* Copyright 2000 Roland Borde
|
|
* Copyright 2000 Paolo Scaffardi
|
|
* Copyright 2000-2002 Wolfgang Denk, wd@denx.de
|
|
* Copyright 2009 Dirk Behme, dirk.behme@googlemail.com
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <net.h>
|
|
|
|
struct in_addr string_to_ip(const char *s)
|
|
{
|
|
struct in_addr addr;
|
|
char *e;
|
|
int i;
|
|
|
|
addr.s_addr = 0;
|
|
if (s == NULL)
|
|
return addr;
|
|
|
|
for (addr.s_addr = 0, i = 0; i < 4; ++i) {
|
|
ulong val = s ? simple_strtoul(s, &e, 10) : 0;
|
|
if (val > 255) {
|
|
addr.s_addr = 0;
|
|
return addr;
|
|
}
|
|
if (i != 3 && *e != '.') {
|
|
addr.s_addr = 0;
|
|
return addr;
|
|
}
|
|
addr.s_addr <<= 8;
|
|
addr.s_addr |= (val & 0xFF);
|
|
if (s) {
|
|
s = (*e) ? e+1 : e;
|
|
}
|
|
}
|
|
|
|
addr.s_addr = htonl(addr.s_addr);
|
|
return addr;
|
|
}
|
|
|
|
void string_to_enetaddr(const char *addr, uint8_t *enetaddr)
|
|
{
|
|
char *end;
|
|
int i;
|
|
|
|
if (!enetaddr)
|
|
return;
|
|
|
|
for (i = 0; i < 6; ++i) {
|
|
enetaddr[i] = addr ? simple_strtoul(addr, &end, 16) : 0;
|
|
if (addr)
|
|
addr = (*end) ? end + 1 : end;
|
|
}
|
|
}
|
|
|
|
uint compute_ip_checksum(const void *vptr, uint nbytes)
|
|
{
|
|
int sum, oddbyte;
|
|
const unsigned short *ptr = vptr;
|
|
|
|
sum = 0;
|
|
while (nbytes > 1) {
|
|
sum += *ptr++;
|
|
nbytes -= 2;
|
|
}
|
|
if (nbytes == 1) {
|
|
oddbyte = 0;
|
|
((u8 *)&oddbyte)[0] = *(u8 *)ptr;
|
|
((u8 *)&oddbyte)[1] = 0;
|
|
sum += oddbyte;
|
|
}
|
|
sum = (sum >> 16) + (sum & 0xffff);
|
|
sum += (sum >> 16);
|
|
sum = ~sum & 0xffff;
|
|
|
|
return sum;
|
|
}
|
|
|
|
uint add_ip_checksums(uint offset, uint sum, uint new)
|
|
{
|
|
ulong checksum;
|
|
|
|
sum = ~sum & 0xffff;
|
|
new = ~new & 0xffff;
|
|
if (offset & 1) {
|
|
/*
|
|
* byte-swap the sum if it came from an odd offset; since the
|
|
* computation is endian-independent this works.
|
|
*/
|
|
new = ((new >> 8) & 0xff) | ((new << 8) & 0xff00);
|
|
}
|
|
checksum = sum + new;
|
|
if (checksum > 0xffff)
|
|
checksum -= 0xffff;
|
|
|
|
return (~checksum) & 0xffff;
|
|
}
|
|
|
|
int ip_checksum_ok(const void *addr, uint nbytes)
|
|
{
|
|
return !(compute_ip_checksum(addr, nbytes) & 0xfffe);
|
|
}
|