$OpenBSD: patch-link-bpf_c,v 1.2 2011/03/03 09:47:51 sthen Exp $
--- link-bpf.c.orig	Sun Jan  9 10:37:09 2011
+++ link-bpf.c	Thu Mar  3 08:58:57 2011
@@ -254,6 +254,10 @@ get_hardware_address(link_t *handle, unsigned char hw_
  */
    for (p = buf; p < buf + len; p += ifm->ifm_msglen) {
       ifm = (struct if_msghdr *)p;
+
+      if (ifm->ifm_version != RTM_VERSION)
+         continue;
+
       sdl = (struct sockaddr_dl *)(ifm + 1);
 
       if (ifm->ifm_type != RTM_IFINFO || (ifm->ifm_addrs & RTA_IFP) == 0)