Ignore null MAC addresses.

338eb19b · Juliusz Chroboczek · 7d98e134 · 338eb19b
Commit 338eb19b authored Oct 18, 2008 by Juliusz Chroboczek
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Showing with 3 additions and 2 deletions

kernel.c kernel.c +3 -2

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--- a/kernel.c
+++ b/kernel.c
@@ -80,8 +80,9 @@ if_eui64(char *ifname, int ifindex, unsigned char *eui)
    close(s);
    mac = (unsigned char *)req.ifr_hwaddr.sa_data;
-    /* Check not group and global */
+    /* OpenVPN interfaces have a null MAC address.  Also check not group
-    if((mac[0] & 1) != 0 || (mac[0] & 2) != 0) {
+       and global */
+    if(memcmp(mac, zeroes, 6) == 0 || (mac[0] & 1) != 0 || (mac[0] & 2) != 0) {
        errno = ENOENT;
        return -1;
    }