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author | David Gibson <david@gibson.dropbear.id.au> | 2024-08-21 14:19:58 +1000 |
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committer | Stefano Brivio <sbrivio@redhat.com> | 2024-08-21 11:59:51 +0200 |
commit | 066e69986b96bf83dfa2ec09f6b03b6a7ad6bbd6 (patch) | |
tree | 921198ec4d648439ff17dde83e07a963c6c3dbc1 /util.c | |
parent | e6feb5a892b4efc2b149883f58915154d6eb349f (diff) | |
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util: Helper for formatting MAC addresses
There are a couple of places where we somewhat messily open code formatting
an Ethernet like MAC address for display. Add an eth_ntop() helper for
this.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Diffstat (limited to 'util.c')
-rw-r--r-- | util.c | 19 |
1 files changed, 19 insertions, 0 deletions
@@ -676,6 +676,25 @@ const char *sockaddr_ntop(const void *sa, char *dst, socklen_t size) return dst; } +/** eth_ntop() - Convert an Ethernet MAC address to text format + * @mac: MAC address + * @dst: Output buffer, minimum ETH_ADDRSTRLEN bytes + * @size: Size of buffer at @dst + * + * Return: On success, a non-null pointer to @dst, NULL on failure + */ +const char *eth_ntop(const unsigned char *mac, char *dst, size_t size) +{ + int len; + + len = snprintf(dst, size, "%02x:%02x:%02x:%02x:%02x:%02x", + mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); + if (len < 0 || (size_t)len >= size) + return NULL; + + return dst; +} + /** str_ee_origin() - Convert socket extended error origin to a string * @ee: Socket extended error structure * |