mirror of https://github.com/hak5/openwrt-owl.git
76 lines
1.5 KiB
C
76 lines
1.5 KiB
C
|
/*
|
||
|
|
* Atheros AR71xx minimal nvram support
|
||
|
|
*
|
||
|
|
* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License version 2 as published
|
||
|
|
* by the Free Software Foundation.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/vmalloc.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/string.h>
|
||
|
|
|
||
|
|
#include "nvram.h"
|
||
|
|
|
||
|
|
char *ath79_nvram_find_var(const char *name, const char *buf, unsigned buf_len)
|
||
|
|
{
|
||
|
|
unsigned len = strlen(name);
|
||
|
|
char *cur, *last;
|
||
|
|
|
||
|
|
if (buf_len == 0 || len == 0)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
if (buf_len < len)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
if (len == 1)
|
||
|
|
return memchr(buf, (int) *name, buf_len);
|
||
|
|
|
||
|
|
last = (char *) buf + buf_len - len;
|
||
|
|
for (cur = (char *) buf; cur <= last; cur++)
|
||
|
|
if (cur[0] == name[0] && memcmp(cur, name, len) == 0)
|
||
|
|
return cur + len;
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
int ath79_nvram_parse_mac_addr(const char *nvram, unsigned nvram_len,
|
||
|
|
const char *name, char *mac)
|
||
|
|
{
|
||
|
|
char *buf;
|
||
|
|
char *mac_str;
|
||
|
|
int ret;
|
||
|
|
int t;
|
||
|
|
|
||
|
|
buf = vmalloc(nvram_len);
|
||
|
|
if (!buf)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
memcpy(buf, nvram, nvram_len);
|
||
|
|
buf[nvram_len - 1] = '\0';
|
||
|
|
|
||
|
|
mac_str = ath79_nvram_find_var(name, buf, nvram_len);
|
||
|
|
if (!mac_str) {
|
||
|
|
ret = -EINVAL;
|
||
|
|
goto free;
|
||
|
|
}
|
||
|
|
|
||
|
|
t = sscanf(mac_str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
|
||
|
|
&mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5]);
|
||
|
|
|
||
|
|
if (t != 6) {
|
||
|
|
ret = -EINVAL;
|
||
|
|
goto free;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = 0;
|
||
|
|
|
||
|
|
free:
|
||
|
|
vfree(buf);
|
||
|
|
return ret;
|
||
|
|
}
|