X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/6a66f110963d96a92de4f4d2e757ef2893c3c3ee..b5068d5380c73e02bc35a96f641cad18d9b03f3d:/print-ip-demux.c

diff --git a/print-ip-demux.c b/print-ip-demux.c
index b6d6b706..7df0f709 100644
--- a/print-ip-demux.c
+++ b/print-ip-demux.c
@@ -105,11 +105,23 @@ again:
 		break;
 
 	case IPPROTO_ICMP:
-		icmp_print(ndo, bp, length, iph, fragmented);
+		if (ver == 4)
+			icmp_print(ndo, bp, length, iph, fragmented);
+		else {
+			ND_PRINT("[%s requires IPv4]",
+				 tok2str(ipproto_values,"unknown",nh));
+			nd_print_invalid(ndo);
+		}
 		break;
 
 	case IPPROTO_ICMPV6:
-		icmp6_print(ndo, bp, length, iph, fragmented);
+		if (ver == 6)
+			icmp6_print(ndo, bp, length, iph, fragmented);
+		else {
+			ND_PRINT("[%s requires IPv6]",
+				 tok2str(ipproto_values,"unknown",nh));
+			nd_print_invalid(ndo);
+		}
 		break;
 
 	case IPPROTO_PIGP:
@@ -149,7 +161,13 @@ again:
 		break;
 
 	case IPPROTO_IGMP:
-		igmp_print(ndo, bp, length);
+		if (ver == 4)
+			igmp_print(ndo, bp, length);
+		else {
+			ND_PRINT("[%s requires IPv4]",
+				 tok2str(ipproto_values,"unknown",nh));
+			nd_print_invalid(ndo);
+		}
 		break;
 
 	case IPPROTO_IPV4: