$OpenBSD: patch-sim_ether_c,v 1.12 2010/03/21 09:26:49 jasper Exp $
--- sim_ether.c.orig	Thu Apr 24 17:11:42 2008
+++ sim_ether.c	Tue Jan 26 13:12:30 2010
@@ -919,7 +919,7 @@ t_stat eth_open(ETH_DEV* dev, char* name, DEVICE* dptr
       /* probably is not ethX and has no description */
       savname = eth_getname_byname(name, temp);
       if (savname == 0) /* didn't translate */
-        return SCPE_OPENERR;
+        savname = name;
     }
   }
 
@@ -945,14 +945,19 @@ t_stat eth_open(ETH_DEV* dev, char* name, DEVICE* dptr
   dev->dptr = dptr;
   dev->dbit = dbit;
 
-#if !defined(HAS_PCAP_SENDPACKET) && defined (xBSD) && !defined (__APPLE__)
+#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
   /* Tell the kernel that the header is fully-formed when it gets it.
      This is required in order to fake the src address. */
   {
     int one = 1;
     ioctl(pcap_fileno(dev->handle), BIOCSHDRCMPLT, &one);
+#ifdef __OpenBSD__
+    /* set direction filter */
+    one = BPF_DIRECTION_OUT;
+    ioctl(pcap_fileno(dev->handle), BIOCSDIRFILT, &one);
+#endif /* __OpenBSD__ */
   }
-#endif /* xBSD */
+#endif /* __FreeBSD__ || __NetBSD__ || __OpenBSD__ */
 
 #if defined (USE_READER_THREAD)
   {