X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/d33705dab664019c1f602d8c5220288be1f49822..6c8ef0eb86a39c277d1a43802dd8ea01b51cfb2a:/print-dhcp6.c?ds=inline

diff --git a/print-dhcp6.c b/print-dhcp6.c
index 16f82542..cbb6d84a 100644
--- a/print-dhcp6.c
+++ b/print-dhcp6.c
@@ -304,6 +304,7 @@ dhcp6opt_print(netdissect_options *ndo,
 			goto trunc;
 		opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
 		ND_PRINT((ndo, " (%s", tok2str(dh6opt_str, "opt_%u", opttype)));
+		ND_TCHECK2(*(cp + sizeof(*dh6o)), optlen);
 		switch (opttype) {
 		case DH6OPT_CLIENTID:
 		case DH6OPT_SERVERID:
@@ -517,6 +518,10 @@ dhcp6opt_print(netdissect_options *ndo,
 			ND_PRINT((ndo, "...)"));
 			break;
 		case DH6OPT_RECONF_MSG:
+			if (optlen != 1) {
+				ND_PRINT((ndo, " ?)"));
+				break;
+			}
 			tp = (const u_char *)(dh6o + 1);
 			switch (*tp) {
 			case DH6_RENEW:
@@ -731,7 +736,7 @@ dhcp6opt_print(netdissect_options *ndo,
 			while (remain_len && *tp) {
 				label_len =  *tp++;
 				if (label_len < remain_len - 1) {
-					fn_printn(ndo, tp, label_len, NULL);
+					(void)fn_printn(ndo, tp, label_len, NULL);
 					tp += label_len;
 					remain_len -= (label_len + 1);
 					if(*tp) ND_PRINT((ndo, "."));
@@ -751,7 +756,7 @@ dhcp6opt_print(netdissect_options *ndo,
 			}
 			tp = (const u_char *)(dh6o + 1);
 			ND_PRINT((ndo, "="));
-			fn_printn(ndo, tp, (u_int)optlen, NULL);
+			(void)fn_printn(ndo, tp, (u_int)optlen, NULL);
 			ND_PRINT((ndo, ")"));
 			break;