Fix MAC address enumeration on *BSD.

CHANGELOG

@@ -79,6 +79,9 @@ version 2.67
 	    deprecated first. Thanks to Uwe Schindler for persuasively
 	    arguing for this.
 
+	    Fix MAC address enumeration on *BSD. Thanks to Brad Smith
+	    for the bug report.
+
 
 version 2.66
             Add the ability to act as an authoritative DNS

src/bpf.c

@@ -111,7 +111,8 @@ int iface_enumerate(int family, void *parm, int (*callback)())
 	{
 	  int iface_index = if_nametoindex(addrs->ifa_name);
 
-	  if (iface_index == 0 || !addrs->ifa_addr || !addrs->ifa_netmask)
+	  if (iface_index == 0 || !addrs->ifa_addr || 
+	      (!addrs->ifa_netmask && family != AF_LINK))
 	    continue;
 
 	  if (family == AF_INET)