| 1 | |
| 2 | #include <linux/string.h>
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| 3 | #include <linux/if_ether.h>
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| 4 | #include <linux/ctype.h>
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| 5 | #include <linux/export.h>
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| 6 | #include <linux/hex.h>
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| 7 |
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| 8 | bool mac_pton(const char *s, u8 *mac)
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| 9 | {
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| 10 | size_t maxlen = 3 * ETH_ALEN - 1;
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| 11 | int i;
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| 12 |
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| 13 |
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| 14 | if (strnlen(s, maxlen) < maxlen)
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| 15 | return false;
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| 16 |
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| 17 |
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| 18 | for (i = 0; i < ETH_ALEN; i++) {
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| 19 | if (!isxdigit(s[i * 3]) || !isxdigit(s[i * 3 + 1]))
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| 20 | return false;
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| 21 | if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':')
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| 22 | return false;
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| 23 | }
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| 24 | for (i = 0; i < ETH_ALEN; i++) {
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| 25 | mac[i] = (hex_to_bin(s[i * 3]) << 4) | hex_to_bin(s[i * 3 + 1]);
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| 26 | }
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| 27 | return true;
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| 28 | }
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| 29 | EXPORT_SYMBOL(mac_pton);
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