/* COISERVER - SERVER CONNESSION ORIENTED SU INTERNET PORT =1234*/

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>

#define NSTRS 3
#define MSGLEN 32

char *strs[NSTRS] = {
  "1a stringa dal server",
  "2a stringa dal server",
  "3a stringa dal server"
};


main()
{
	char c;
	int fromlen;
	register int i,  s,  s1, s2, pid;
	struct  sockaddr_in myname, fromname;
	char str1[200];
	fd_set ready;
	struct timeval tempo;

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

	myname.sin_family = AF_INET;
	myname.sin_port = htons(1234);
	myname.sin_addr.s_addr = INADDR_ANY;

	if (bind(s, (struct sockaddr*)&myname, sizeof myname) < 0) {
		perror("client: bind");
		exit(1);
	}

	if (listen(s, 5) < 0) {
		perror("server: listen");
		exit(1);
	}

/*Accetto due connessioni*/

        s1 = accept(s, NULL,0);
	if (s1 == -1) perror("accept");

        s2 = accept(s, NULL,0);
	if (s2 == -1) perror("accept");


	i=0;
	while(1){
		FD_ZERO(&ready);
		FD_SET(s1,&ready);
		FD_SET(s2,&ready);
		tempo.tv_sec = 0;
		tempo.tv_usec =1000; 
 
		if (select(FD_SETSIZE, &ready, (fd_set*)0, (fd_set*)0, &tempo)<0){
			perror("select");
			continue;
		}

		/* Inizia qui lo scambio di dati con i clients  */

		if (FD_ISSET(s1,&ready)) { 	 
			fromlen = recv(s1, str1,MSGLEN,0);
			str1[fromlen] = '\0';
			printf("%s\n",str1);
			send(s1,strs[0], MSGLEN, 0);
	 	
		}

		if (FD_ISSET(s2,&ready)) { 	 
			fromlen = recv(s2, str1,MSGLEN,0);
			str1[fromlen] = '\0';
			printf("%s\n",str1);
			send(s2,strs[1], MSGLEN, 0);
	 	
		}

/* qui si fa qualcosa */
 
	printf(" %d\n",i++);
	}
}