--- ping.c	Tue May 19 11:16:15 1998
+++ newping.c	Tue Nov 24 09:42:39 1998
@@ -180,6 +180,7 @@
 char DOT = '.';
 static char *hostname;
 static int ident;		/* process id to identify our packets */
+static struct in_addr dest_addr_store;
 
 /* counters */
 static long npackets;		/* max packets to transmit */
@@ -393,6 +394,8 @@
 		hostname = hnamebuf;
 	}
 
+	dest_addr_store = to->sin_addr;
+	    
 	if (options & F_FLOOD && options & F_INTERVAL) {
 		(void)fprintf(stderr,
 		    "ping: -f and -i incompatible options.\n");
@@ -716,6 +719,14 @@
 		if (options & F_QUIET)
 			return;
 
+    	/* Check reply is from pinged host */
+		if (memcmp(&dest_addr_store, &ip->saddr, sizeof(struct in_addr))) {
+			printf("Reply not from target. Source %s",inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr));
+			(void)printf(" ttl=%d", ip->ip_ttl);
+			if (timing)
+				(void)printf(" time=%ld.%ld ms", triptime/10, triptime%10);
+        }
+        else
 		if (options & F_FLOOD)
 			(void)write(STDOUT_FILENO, &BSPACE, 1);
 		else {