$OpenBSD: patch-src_decode_proto_c,v 1.2 2011/04/07 20:09:45 benoit Exp $
--- src/decode_proto.c.orig	Sun Feb  6 11:10:46 2011
+++ src/decode_proto.c	Sat Apr  2 17:13:26 2011
@@ -26,6 +26,7 @@
 #ifdef HAVE_ARPA_INET_H
 #include <arpa/inet.h>
 #endif
+#include <sys/socket.h>
 #include "prot_types.h"
 #include "util.h"
 #include "decode_proto.h"
@@ -165,7 +166,9 @@
  {"WLAN",   DLT_IEEE802_11,    LINK6,   get_wlan }, 
  /* Wireless with radiotap header */
  {"WLAN+RTAP",  DLT_IEEE802_11_RADIO, LINK6, get_radiotap }, 
+#ifndef __OpenBSD__
  {"PPI",  DLT_PPI, LINK6, get_ppi }, /* PPI encapsulation */
+#endif
  {NULL,   0, 0 } /* terminating entry, must be last */
 };