(icmp_print): check checksum if vflag. From [email protected]

diff --git a/print-icmp.c b/print-icmp.c
index 5e50f3accd19ab82d59a27f5d402e481d239f456..ce674b330ad06d62b82ad640f725e9a9b43eb37c 100644 (file)
--- a/print-icmp.c
+++ b/print-icmp.c
@@ -21,7 +21,7 @@
 
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-icmp.c,v 1.40 1999-10-30 05:11:13 itojun Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/tcpdump/print-icmp.c,v 1.41 1999-11-21 03:46:38 assar Exp $ (LBL)";
 #endif
 
 #include <sys/param.h>
@@ -162,7 +162,7 @@ struct id_rdiscovery {
 };
 
 void
-icmp_print(register const u_char *bp, register const u_char *bp2)
+icmp_print(register const u_char *bp, u_int plen, register const u_char *bp2)
 {
        register char *cp;
        register const struct icmp *dp;
@@ -349,6 +349,12 @@ icmp_print(register const u_char *bp, register const u_char *bp2)
                break;
        }
         (void)printf("icmp: %s", str);
+       if (vflag) {
+               if (((u_char*)bp) + plen <= snapend) {
+                       if (in_cksum((u_short*)dp, plen, 0))
+                               printf(" (wrong icmp csum)");
+               }
+       }
        return;
 trunc:
        fputs("[|icmp]", stdout);