parent
86a8480788
commit
858ea76117
@ -0,0 +1,75 @@ |
||||
/*
|
||||
* 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 *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 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 = 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; |
||||
} |
@ -0,0 +1,19 @@ |
||||
/*
|
||||
* 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. |
||||
*/ |
||||
|
||||
#ifndef _AR71XX_NVRAM_H |
||||
#define _AR71XX_NVRAM_H |
||||
|
||||
char *nvram_find_var(const char *name, const char *buf, |
||||
unsigned buf_len) __init; |
||||
int nvram_parse_mac_addr(const char *nvram, unsigned nvram_len, |
||||
const char *name, char *mac) __init; |
||||
|
||||
#endif /* _AR71XX_NVRAM_H */ |
Loading…
Reference in new issue