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diff --git a/sources/UDP_daytime.c b/sources/UDP_daytime.c
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+/* UDP_daytime.c
+ * 
+ * Copyright (C) 2004 Simone Piccardi
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/****************************************************************
+ *
+ * Program daytime: 
+ * Elementary UDP client for daytime service (port 13)
+ *
+ * Author: Simone Piccardi
+ * Mar. 2004
+ *
+ * Usage: daytime -h give all info's
+ *
+ * $Id: UDP_daytime.c,v 1.1 2004/03/20 22:42:07 piccardi Exp $
+ *
+ ****************************************************************/
+/* 
+ * Include needed headers
+ */
+#include <sys/types.h>   /* predefined types */
+#include <unistd.h>      /* include unix standard library */
+#include <arpa/inet.h>   /* IP addresses conversion utiliites */
+#include <sys/socket.h>  /* socket library */
+#include <stdio.h>	 /* include standard I/O library */
+
+#define MAXLINE 80
+/* Program begin */
+void usage(void);
+int main(int argc, char *argv[])
+{
+/* 
+ * Variables definition  
+ */
+    int sock;
+    int i, nread;
+    struct sockaddr_in addr;
+    char buffer[MAXLINE];
+    /*
+     * Input section: decode parameters passed in the calling 
+     * Use getopt function
+     */
+    opterr = 0;	 /* don't want writing to stderr */
+    while ( (i = getopt(argc, argv, "h")) != -1) {
+	switch (i) {
+	/* 
+	 * Handling options 
+	 */ 
+	case 'h':  
+	    printf("Wrong -h option use\n");
+	    usage();
+	    return(0);
+	    break;
+	case '?':   /* unrecognized options */
+	    printf("Unrecognized options -%c\n",optopt);
+	    usage();
+	default:    /* should not reached */
+	    usage();
+	}
+    }
+    /* ***********************************************************
+     * 
+     *		 Options processing completed
+     *
+     *		      Main code beginning
+     * 
+     * ***********************************************************/
+    /* create socket */
+    if ( (sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+	perror("Socket creation error");
+	return -1;
+    }
+    /* initialize address */
+    memset((void *) &addr, 0, sizeof(addr));    /* clear server address */
+    addr.sin_family = AF_INET;                  /* address type is INET */
+    addr.sin_port = htons(13);                  /* daytime port is 13 */
+    /* build address using inet_pton */
+    if ( (inet_pton(AF_INET, argv[optind], &addr.sin_addr)) <= 0) {
+	perror("Address creation error");
+	return -1;
+    }
+    /* send request packet */
+    nread = sendto(sock, NULL, 0, 0, (struct sockaddr *)&addr, sizeof(addr));
+    if (nread < 0) {
+	perror("Request error");
+	return -1;
+    }
+    nread = recvfrom(sock, buffer, MAXLINE, 0, NULL, NULL);
+    if (nread < 0) {
+	perror("Read error");
+	return -1;
+    }
+    /* print results */
+    if (nread > 0) {
+	buffer[nread]=0;
+	if (fputs(buffer, stdout) == EOF) {          /* write daytime */
+	    perror("fputs error");
+	    return -1;
+	}
+    }
+    /* normal exit */
+    return 0;
+}
+/*
+ * routine to print usage info and exit
+ */
+void usage(void) {
+    printf("Take daytime from a remote host \n");
+    printf("Usage:\n");
+    printf("  daytime [-h] [-v] [host in dotted decimal form] \n");
+//    printf("  -v	   set verbosity on\n");
+    printf("  -h	   print this help\n");
+    exit(1);
+}