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| author |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2013-09-18 07:58:33 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2013-09-18 07:58:33 -0700 |
| commit | 4ba25a496f62129a2ad8c2436ab2b402752dc66c (patch) | |
| tree | 8abf41a79f293832a430a9609530c24cd365466c /lib/net_utils.c | |
| parent | Input: rb532_button - remove redundant dev_set_drvdata (diff) | |
| parent | Linux 3.11 (diff) | |
| download | linux-dev-4ba25a496f62129a2ad8c2436ab2b402752dc66c.tar.xz linux-dev-4ba25a496f62129a2ad8c2436ab2b402752dc66c.zip | |
Merge tag 'v3.11' into next
Merge with mainline to bring in sync changes to cyttsp4 driver.
Diffstat (limited to 'lib/net_utils.c')
| -rw-r--r-- | lib/net_utils.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/net_utils.c b/lib/net_utils.c new file mode 100644 index 000000000000..2e3c52c8d050 --- /dev/null +++ b/lib/net_utils.c @@ -0,0 +1,26 @@ +#include <linux/string.h> +#include <linux/if_ether.h> +#include <linux/ctype.h> +#include <linux/kernel.h> + +int mac_pton(const char *s, u8 *mac) +{ + int i; + + /* XX:XX:XX:XX:XX:XX */ + if (strlen(s) < 3 * ETH_ALEN - 1) + return 0; + + /* Don't dirty result unless string is valid MAC. */ + for (i = 0; i < ETH_ALEN; i++) { + if (!isxdigit(s[i * 3]) || !isxdigit(s[i * 3 + 1])) + return 0; + if (i != ETH_ALEN - 1 && s[i * 3 + 2] != ':') + return 0; + } + for (i = 0; i < ETH_ALEN; i++) { + mac[i] = (hex_to_bin(s[i * 3]) << 4) | hex_to_bin(s[i * 3 + 1]); + } + return 1; +} +EXPORT_SYMBOL(mac_pton); |