X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/f274a23dc1767eca8f4c433f6bd11ac5dbf4f31e..e49c9b9fc43e93ca402ec7517aa55a27252eca92:/print-ascii.c

diff --git a/print-ascii.c b/print-ascii.c
index f83d401a..3cefef33 100644
--- a/print-ascii.c
+++ b/print-ascii.c
@@ -55,10 +55,14 @@
 
 void
 ascii_print(netdissect_options *ndo,
-            register const u_char *cp, register u_int length)
+            const u_char *cp, u_int length)
 {
+	u_int caplength;
 	register u_char s;
 
+	caplength = (ndo->ndo_snapend >= cp) ? ndo->ndo_snapend - cp : 0;
+	if (length > caplength)
+		length = caplength;
 	ND_PRINT((ndo, "\n"));
 	while (length > 0) {
 		s = *cp++;
@@ -89,12 +93,16 @@ void
 hex_and_ascii_print_with_offset(netdissect_options *ndo, register const char *ident,
     register const u_char *cp, register u_int length, register u_int oset)
 {
+	u_int caplength;
 	register u_int i;
 	register int s1, s2;
 	register int nshorts;
 	char hexstuff[HEXDUMP_SHORTS_PER_LINE*HEXDUMP_HEXSTUFF_PER_SHORT+1], *hsp;
 	char asciistuff[ASCII_LINELENGTH+1], *asp;
 
+	caplength = (ndo->ndo_snapend >= cp) ? ndo->ndo_snapend - cp : 0;
+	if (length > caplength)
+		length = caplength;
 	nshorts = length / sizeof(u_short);
 	i = 0;
 	hsp = hexstuff; asp = asciistuff;
@@ -147,9 +155,13 @@ hex_print_with_offset(netdissect_options *ndo,
                       const char *ident, const u_char *cp, u_int length,
 		      u_int oset)
 {
+	u_int caplength;
 	register u_int i, s;
 	register int nshorts;
 
+	caplength = (ndo->ndo_snapend >= cp) ? ndo->ndo_snapend - cp : 0;
+	if (length > caplength)
+		length = caplength;
 	nshorts = (u_int) length / sizeof(u_short);
 	i = 0;
 	while (--nshorts >= 0) {