diff -ru hafiye-1.0/Packet.c hafiye-1.0-pl1/Packet.c
--- hafiye-1.0/Packet.c	Thu Jun 13 01:43:35 2002
+++ hafiye-1.0-pl1/Packet.c	Wed Aug 25 10:25:11 2004
@@ -113,6 +113,8 @@
 	int protident;
 	struct in_addr in;
 	unsigned retn = 0;
+	int i = 0, j = 0;
+	u_char *pptr = NULL;
 	if (proto < 0)
 		return;
@@ -125,7 +127,12 @@
 	if((p = lfour[proto]) == NULL) {
 		fprintf(stderr, "layer_four_packet_handler: I don't have protocol knowledge base for Protocol ID: %d\nPlease add knowledge base information with Protocol_Id=%d to Layer IV knowledge base\nand restart me!\n", proto, proto);
 		fprintf(stderr, "Dumping packet contents...\n");
-		fwrite(packet, sizeof(char), len, stdout);
+		for (i = 0; i < len; i++) {
+			if (isgraph(packet[i]) || isspace(packet[i]))
+				fputc(packet[i], stdout);
+			else
+				fputc('.', stdout);
+		}
 		fwrite("\n", sizeof(char), 1, stdout);
 		fflush(stdout);
 		return;
@@ -146,7 +153,15 @@
 	printf("\t\tPacket Payload Dump: \n");
 	if (p != NULL) {
-		fwrite(packet + p->len, sizeof(char), len - p->len, stdout);
+		pptr = packet + p->len;
+		j = len - p->len;
+		for (i = 0; i < j; i++) {
+			if (isgraph(pptr[i]) || isspace(packet[i]))
+				fputc(packet[i], stdout);
+			else
+				fputc('.', stdout);
+		}
+		fwrite("\n", sizeof(char), 1, stdout);
 		fflush(stdout);
 	}
 }