/*CLICLIENT CLIENT CONNESSION LESS SU INTERNET */
/*parametri: hostname port */
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>

#define BUFSZ	256
#define DATA "012345678901234567890123456789..."

main(argc, argv)
	int argc;
	char *argv[];
{
	int sock,flength;
	struct sockaddr_in name; 
	int bufin[BUFSZ],bufout[BUFSZ];
	int i;

	struct hostent *hp, *gethostbyname();

	if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
		perror("server:socket");
		exit(1);
	}

	hp = gethostbyname(argv[1]);
	if (hp == 0) {
		fprintf(stderr, "%s: host sconosciuto", argv[1]);
		exit(2);
	}
	bcopy((char *)hp->h_addr,(char *)&name.sin_addr,hp->h_length);

	name.sin_family = AF_INET;
	name.sin_port = htons(atoi(argv[2]));
	
	i=0;
	while (1)
	{
	i++;
	bufout[0] = getpid();  	/* pid */
	bufout[1] = i;		/* # messaggio */

	if (sendto(sock,bufout, sizeof bufout,0, 
                        (struct sockaddr*)&name,sizeof name) < 0)
			perror("sending datagram packet");
	
	if (recvfrom(sock,bufin, sizeof(bufin),0, 0, 0) < 0)
		perror("receiving datagram packet");

	printf("\r -->%d<--%d<--%d", bufin[0], bufin[1],bufin[2]);
}
	close(sock);

	exit(0);
}