OpenWrt – Blame information for rev 1
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Rev | Author | Line No. | Line |
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1 | office | 1 | /* |
2 | * Atheros AR71xx minimal nvram support |
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3 | * |
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4 | * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org> |
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5 | * |
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6 | * This program is free software; you can redistribute it and/or modify it |
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7 | * under the terms of the GNU General Public License version 2 as published |
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8 | * by the Free Software Foundation. |
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9 | */ |
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10 | |||
11 | #include <linux/kernel.h> |
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12 | #include <linux/vmalloc.h> |
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13 | #include <linux/errno.h> |
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14 | #include <linux/init.h> |
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15 | #include <linux/string.h> |
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16 | #include <linux/etherdevice.h> |
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17 | |||
18 | #include "nvram.h" |
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19 | |||
20 | char *ath79_nvram_find_var(const char *name, const char *buf, unsigned buf_len) |
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21 | { |
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22 | unsigned len = strlen(name); |
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23 | char *cur, *last; |
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24 | |||
25 | if (buf_len == 0 || len == 0) |
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26 | return NULL; |
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27 | |||
28 | if (buf_len < len) |
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29 | return NULL; |
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30 | |||
31 | if (len == 1) |
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32 | return memchr(buf, (int) *name, buf_len); |
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33 | |||
34 | last = (char *) buf + buf_len - len; |
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35 | for (cur = (char *) buf; cur <= last; cur++) |
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36 | if (cur[0] == name[0] && memcmp(cur, name, len) == 0) |
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37 | return cur + len; |
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38 | |||
39 | return NULL; |
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40 | } |
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41 | |||
42 | int ath79_nvram_parse_mac_addr(const char *nvram, unsigned nvram_len, |
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43 | const char *name, char *mac) |
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44 | { |
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45 | char *buf; |
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46 | char *mac_str; |
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47 | int ret; |
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48 | int t; |
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49 | |||
50 | buf = vmalloc(nvram_len); |
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51 | if (!buf) |
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52 | return -ENOMEM; |
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53 | |||
54 | memcpy(buf, nvram, nvram_len); |
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55 | buf[nvram_len - 1] = '\0'; |
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56 | |||
57 | mac_str = ath79_nvram_find_var(name, buf, nvram_len); |
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58 | if (!mac_str) { |
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59 | ret = -EINVAL; |
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60 | goto free; |
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61 | } |
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62 | |||
63 | if (strlen(mac_str) == 19 && mac_str[0] == '"' && mac_str[18] == '"') { |
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64 | mac_str[18] = 0; |
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65 | mac_str++; |
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66 | } |
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67 | |||
68 | t = sscanf(mac_str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", |
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69 | &mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5]); |
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70 | |||
71 | if (t != ETH_ALEN) |
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72 | t = sscanf(mac_str, "%02hhx-%02hhx-%02hhx-%02hhx-%02hhx-%02hhx", |
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73 | &mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5]); |
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74 | |||
75 | if (t != ETH_ALEN) { |
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76 | ret = -EINVAL; |
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77 | goto free; |
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78 | } |
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79 | |||
80 | ret = 0; |
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81 | |||
82 | free: |
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83 | vfree(buf); |
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84 | return ret; |
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85 | } |