msdp: do some additional bounds checks.

[tcpdump] / print-tcp.c

diff --git a/print-tcp.c b/print-tcp.c
index e4c65e563ad4ec50edff52665a94eea11ed69d26..5680d4324da9a4cf160c279381a9022219074752 100644 (file)
--- a/print-tcp.c
+++ b/print-tcp.c
@@ -30,9 +30,7 @@
 __RCSID("$NetBSD: print-tcp.c,v 1.8 2007/07/24 11:53:48 drochner Exp $");
 #endif
 
-#ifdef HAVE_CONFIG_H
 #include <config.h>
-#endif
 
 #include "netdissect-stdinc.h"
 
@@ -427,14 +425,19 @@ tcp_print(netdissect_options *ndo,
                 }
         }
 
-        if (flags & TH_ACK) {
+        if (flags & TH_ACK)
                 ND_PRINT(", ack %u", ack);
-        }
+        else
+                if (ndo->ndo_vflag > 1 && ack != 0)
+                        ND_PRINT(", [ack %u != 0 while ACK flag not set]", ack);
 
         ND_PRINT(", win %u", win);
 
         if (flags & TH_URG)
                 ND_PRINT(", urg %u", urp);
+        else
+                if (ndo->ndo_vflag > 1 && urp != 0)
+                        ND_PRINT(", [urg %u != 0 while URG flag not set]", urp);
         /*
          * Handle any options.
          */