$OpenBSD: patch-dnstop_c,v 1.3 2010/10/14 07:29:44 sthen Exp $

ns_r_refused comes from /usr/include/arpa/nameser.h on systems using
bind 9-based resolvers; REFUSED is equivalent.

--- dnstop.c.orig	Wed Jan 28 20:40:06 2009
+++ dnstop.c	Thu Oct 14 08:23:37 2010
@@ -45,6 +45,7 @@ static const char *Version = "20090128";
 #include <netdb.h>
 
 #ifdef HAVE_NET_IF_PPP_H
+#include <net/ppp_defs.h>
 #include <net/if_ppp.h>
 #define PPP_ADDRESS_VAL       0xff	/* The address byte value */
 #define PPP_CONTROL_VAL       0x03	/* The control byte value */
@@ -1630,7 +1631,7 @@ RFC1918PtrFilter(FilterData *fd)
 int
 RcodeRefusedFilter(FilterData *fd)
 {
-    return ns_r_refused == fd->rcode ? 1 : 0;
+    return REFUSED == fd->rcode ? 1 : 0;
 }
 
 void
@@ -1839,6 +1840,7 @@ main(int argc, char *argv[])
 	fprintf(stderr, "pcap_setfilter failed\n");
 	exit(1);
     }
+#if 0 /* breaks reading from capture files on OpenBSD */
     /*
      * non-blocking call added for Mac OS X bugfix.  Sent by Max Horn. ref
      * http://www.tcpdump.org/lists/workers/2002/09/msg00033.html
@@ -1848,6 +1850,7 @@ main(int argc, char *argv[])
 	fprintf(stderr, "pcap_setnonblock failed: %s\n", errbuf);
 	exit(1);
     }
+#endif
     switch (pcap_datalink(pcap)) {
     case DLT_EN10MB:
 	handle_datalink = handle_ether;