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Codice: Seleziona tutto

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>


#define PORT 4000
#define IP 15

int main(int argc, char** argv)
{
	int sd, error;
	struct sockaddr_in server_addr, mio_addr;
	int mio_addr_len = sizeof(mio_addr);
	char ip[IP] = "127.0.0.1";
	
	server_addr.sin_family = AF_INET;
	server_addr.sin_port = htons((u_short)PORT);
	server_addr.sin_addr.s_addr = (long)inet_addr(ip);
	
	sd = socket(AF_INET, SOCK_STREAM, 0);
	error = connect(sd, &server_addr, sizeof(server_addr));
	
	if (error==0) {
		printf("Connessione stabilita! \n");
		getsockname(sd,  &mio_addr, &mio_addr_len);
		printf("Il mio port e': %i \n", ntohs(mio_addr.sin_port));
	}
	
	else
		printf("Fallito!\n");
		
	close(sd);
	
	return 0;
}

Codice: Seleziona tutto

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>

#define PORT 4000
#define MAXCONN 5

int main(int argc, char** argv)
{
	int sd, new_sd;
	struct sockaddr_in server_addr, client_addr;
	int client_len=sizeof(client_addr);
	
	server_addr.sin_family = AF_INET;
	server_addr.sin_port = htons((u_short)PORT);
	server_addr.sin_addr.s_addr = INADDR_ANY;
	
	sd = socket(AF_INET, SOCK_STREAM, 0);
	bind(sd, &server_addr, sizeof(server_addr));
	listen(sd, MAXCONN);
	printf("In attesa sul mio port %i \n", ntohs(server_addr.sin_port));
	
	new_sd = accept(sd, &client_addr, &client_len);
	
	printf("Ho accettato la connessione \n");
	printf("dal client con port: %i \n", ntohs(client_addr.sin_port));
	close(new_sd);
	close(sd);
	
	return 0;
}

Codice: Seleziona tutto

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>

#define PORT 4000
#define MAXCONN 5

int main(int argc, char** argv)
{
   int sd, new_sd;
   struct sockaddr_in server_addr, client_addr;
   int client_len=sizeof(client_addr);
   
   server_addr.sin_family = AF_INET;
   server_addr.sin_port = htons((u_short)PORT);
   server_addr.sin_addr.s_addr = INADDR_ANY;
   
   sd = socket(AF_INET, SOCK_STREAM, 0);
   
   while (bind(sd, (struct sockaddr*) &server_addr, sizeof(server_addr)) < 0)
   {
	printf ("Chiamata bind() fallita, pausa di 3 sec.\n");
	usleep (3000000);
   }
   
   listen(sd, MAXCONN);
   printf("In attesa sul mio port %i \n", ntohs(server_addr.sin_port));
   
   new_sd = accept(sd, (struct sockaddr*) &client_addr, &client_len);
   
   printf("Ho accettato la connessione \n");
   printf("dal client con port: %i \n", ntohs(client_addr.sin_port));
   close(new_sd);
   close(sd);
   
   return 0;
}

Codice: Seleziona tutto

while((new_sd = accept(sd, &client_addr, &client_lent)) == -1);