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authorJames <>2015-11-04 11:49:21 +0000
committerJames <>2015-11-04 11:49:21 +0000
commit716ca530e1c4515d8683c9d5be3d56b301758b66 (patch)
tree700eb5bcc1a462a5f21dcec15ce7c97ecfefa772 /target/linux/ar71xx/files/arch/mips/ath79/nvram.c
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Diffstat (limited to 'target/linux/ar71xx/files/arch/mips/ath79/nvram.c')
-rw-r--r--target/linux/ar71xx/files/arch/mips/ath79/nvram.c80
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;
+}