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author | James <> | 2015-11-04 11:49:21 +0000 |
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committer | James <> | 2015-11-04 11:49:21 +0000 |
commit | 716ca530e1c4515d8683c9d5be3d56b301758b66 (patch) | |
tree | 700eb5bcc1a462a5f21dcec15ce7c97ecfefa772 /target/linux/ar71xx/files/arch/mips/ath79/nvram.c | |
download | trunk-47381-master.tar.gz trunk-47381-master.tar.bz2 trunk-47381-master.zip |
Diffstat (limited to 'target/linux/ar71xx/files/arch/mips/ath79/nvram.c')
-rw-r--r-- | target/linux/ar71xx/files/arch/mips/ath79/nvram.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/nvram.c b/target/linux/ar71xx/files/arch/mips/ath79/nvram.c new file mode 100644 index 0000000..e55af5a --- /dev/null +++ b/target/linux/ar71xx/files/arch/mips/ath79/nvram.c @@ -0,0 +1,80 @@ +/* + * 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; + } + + if (strlen(mac_str) == 19 && mac_str[0] == '"' && mac_str[18] == '"') { + mac_str[18] = 0; + mac_str++; + } + + 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; +} |