X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/ef3437c081dd78bd51fad6ed0d6af58dcfaabd69..c56f25c54b87b3edaced56578721c72d7ca9795d:/print-ip.c?ds=sidebyside

diff --git a/print-ip.c b/print-ip.c
index 0974fbad..b9d39cf5 100644
--- a/print-ip.c
+++ b/print-ip.c
@@ -68,7 +68,7 @@ ip_printroute(netdissect_options *ndo,
 	if ((length + 1) & 3)
 		ND_PRINT((ndo, " [bad length %u]", length));
 	ND_TCHECK_1(cp + 2);
-	ptr = cp[2] - 1;
+	ptr = EXTRACT_U_1(cp + 2) - 1;
 	if (ptr < 3 || ((ptr + 1) & 3) || ptr > length + 1)
 		ND_PRINT((ndo, " [bad ptr %u]", EXTRACT_U_1(cp + 2)));
 
@@ -114,7 +114,7 @@ ip_finddst(netdissect_options *ndo,
 			len = 1;
 		else {
 			ND_TCHECK_1(cp + 1);
-			len = cp[1];
+			len = EXTRACT_U_1(cp + 1);
 			if (len < 2)
 				break;
 		}
@@ -182,11 +182,12 @@ ip_printts(netdissect_options *ndo,
 		return (0);
 	}
 	ND_PRINT((ndo, " TS{"));
-	hoplen = ((cp[3]&0xF) != IPOPT_TS_TSONLY) ? 8 : 4;
+	ND_TCHECK_1(cp + 3);
+	hoplen = ((EXTRACT_U_1(cp + 3) & 0xF) != IPOPT_TS_TSONLY) ? 8 : 4;
 	if ((length - 4) & (hoplen-1))
 		ND_PRINT((ndo, "[bad length %u]", length));
 	ND_TCHECK_1(cp + 2);
-	ptr = cp[2] - 1;
+	ptr = EXTRACT_U_1(cp + 2) - 1;
 	len = 0;
 	if (ptr < 4 || ((ptr - 4) & (hoplen-1)) || ptr > length + 1)
 		ND_PRINT((ndo, "[bad ptr %u]", EXTRACT_U_1(cp + 2)));
@@ -266,7 +267,7 @@ ip_optprint(netdissect_options *ndo,
 
 		else {
 			ND_TCHECK_1(cp + 1);
-			option_len = cp[1];
+			option_len = EXTRACT_U_1(cp + 1);
 			if (option_len < 2) {
 				ND_PRINT((ndo, " [bad length %u]", option_len));
 				return;