PTP: Use ND_LCHECK_U for checking invalid length

[tcpdump] / print-macsec.c

diff --git a/print-macsec.c b/print-macsec.c
index 38ae26edd5820bb3b2fe34939145a0b71c0199fb..632570b0ca69f1e4f958b33f81c8830731002bdb 100644 (file)
--- a/print-macsec.c
+++ b/print-macsec.c
@@ -219,6 +219,13 @@ macsec_print(netdissect_options *ndo, const u_char **bp,
        }
        *lengthp -= MACSEC_DEFAULT_ICV_LEN;
        *caplenp -= MACSEC_DEFAULT_ICV_LEN;
+       /*
+        * Update the snapend thus the ICV field is not in the payload for
+        * the caller.
+        * The ICV (Integrity Check Value) is at the end of the frame, after
+        * the secure data.
+        */
+       ndo->ndo_snapend -= MACSEC_DEFAULT_ICV_LEN;
 
        /*
         * If the SL field is non-zero, then it's the length of the