Les sockets

https://www.commentcamarche.net/contents/1053-les-fonctions-de-l-api-socket#la-fonction-bind

• Les fonctions des sockets en détail 

• La fonction socket() 

• La fonction bind() 

• La fonction listen() 

• La fonction accept() 

• La fonction connect() 

• La fonction recv() 

• La fonction send() 

• Les fonctions close() et shutdown()

• A lire aussi: Bind socket

/*

socket()

connect()

recv()

close()

*/

#include <stdio.h>

#include <stdlib.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <unistd.h>

#define PORT 9002

int main(int argc, char ** argv)

{

int network_socket;

int connection_status;

/* creation de la socket */

network_socket= socket( AF_INET, SOCK_STREAM, 0);

/* specication de  l'adresse pour la socket */

struct  sockaddr_in  server_address;

server_address.sin_family = AF_INET;

server_address.sin_port = htons (PORT); /* format pour */

server_address.sin_addr.s_addr = INADDR_ANY;

connection_status = connect(network_socket, (struct sockaddr *) &server_address, sizeof (server_address)); 

if (connection_status == -1)

{

printf("Pas de connection possible \n");

return EXIT_FAILURE;

}

/* reception des donnees venant du server */

char server_response[256];

recv(network_socket, &server_response, sizeof(server_response), 0);

printf("La reponse du serveur est : %s\n",server_response);

/* fermer le prise */

close(network_socket);

return EXIT_SUCCESS;

}

#include <stdio.h>

#include <stdlib.h>

#include <stdio.h>

#include <stdlib.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <unistd.h>

#define PORT 9002

int main(int argc, char ** argv)

{

char server_message[256] = "Voila notre message du server !";

        int server_socket;

int client_socket;

/* creation de la socket */

server_socket= socket( AF_INET, SOCK_STREAM, 0);

        struct  sockaddr_in  server_address;

        server_address.sin_family = AF_INET;

        server_address.sin_port = htons (PORT); /* format pour */

        server_address.sin_addr.s_addr = INADDR_ANY;

/*bind */

bind(server_socket, (struct sockaddr*) &server_address, sizeof(server_address));

/* listen */

listen (server_socket, 5); /* backlog */

client_socket = accept (server_socket, NULL, NULL );

/* envoi du message  */

send(client_socket, server_message, sizeof(server_message), 0);

close(server_socket);

return EXIT_SUCCESS;

} 

Un en TCP avec un FORK (multi)

Références:

http://sdz.tdct.org/sdz/les-sockets.html

http://www.yolinux.com/TUTORIALS/Sockets.html#DESCRIPTION

exemple en plusieurs langage , un serveur web

https://rosettacode.org/wiki/Hello_world/Web_server

Ressources :

• https://www.commentcamarche.net/contents/1053-les-fonctions-de-l-api-socket