Index: packetbl.c
==================================================================
--- packetbl.c
+++ packetbl.c
@@ -1369,10 +1369,11 @@
  */
 int check_packet_list(const struct packet_info *ip, struct config_entry *list) {
 
 	struct config_entry *wltmp = NULL;
 	unsigned int ip_proc;
+	int rv;
 
 	if (ip == NULL || list == NULL) {
 		return 0;
 	}
 
@@ -1388,13 +1389,19 @@
 
 		p = ip_proc;
 		p &= wltmp->cidr.processed;
 
 		if (p == wltmp->cidr.ip) {
-			snprintf(msgbuf, sizeof(msgbuf), "%hhu.%hhu.%hhu.%hhu %x/%d",
-				ip->b1, ip->b2, ip->b3, ip->b4,
-				wltmp->cidr.ip, wltmp->cidr.network);
+			rv = snprintf(msgbuf, sizeof(msgbuf), 
+					"%hhu.%hhu.%hhu.%hhu %x/%d",
+					ip->b1, ip->b2, ip->b3, ip->b4,
+					wltmp->cidr.ip, wltmp->cidr.network);
+			if (rv < 0) {
+				syslog(LOG_ERR, "snprintf failed at line %d: %s",
+					__LINE__, strerror(errno));
+				exit (1);
+			}
 			return 1;
 		}
 
 		if (wltmp->next == NULL) {
 			break;
@@ -1424,18 +1431,30 @@
  *   It must be able to cope with "ip" being NULL.
  *
  */
 static void get_ip_string(const struct packet_info *ip) {
 
+	int rv;
+	
 	if (ip == NULL) {
-		sprintf(msgbuf, "-");
+		rv = sprintf(msgbuf, "-");
+		if (rv < 0) {	
+			syslog(LOG_ERR, "sprintf failed in line %d: %s",
+				__LINE__, strerror(errno));
+			exit(1);
+		}
 		return;
 	}
 
-	snprintf(msgbuf, sizeof(msgbuf), "%hhu.%hhu.%hhu.%hhu:%d.%d", ip->b1, 
-		ip->b2, ip->b3, ip->b4,
-		ip->s_port,ip->d_port);
+	rv = snprintf(msgbuf, sizeof(msgbuf), "%hhu.%hhu.%hhu.%hhu:%d.%d", 
+			ip->b1, ip->b2, ip->b3, ip->b4,
+			ip->s_port,ip->d_port);
+		if (rv < 0) {
+			syslog(LOG_ERR, "snprintf failed in line %d: %s",
+				__LINE__, strerror(errno));
+			exit(1);
+		}
 	return;
 }
 
 #ifdef USE_SOCKSTAT
 /*