Salut à tous,
voila j'ai 2 programme en C, concernant les sockets.
Mon probleme c'est que le client se connecte au serveur, mais je veux que le serveur renvoie un message (saisie au clavier) pour notifier au client qu'il est bien connecté. Voici mes deux programmes :
Client :
/****** comclient.c ******/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
/* Our server port as in the previous program */
#define SERVER_PORT 12345
main (int argc, char *argv[])
{
int len, rc;
int sockfd;
char send_buf[100];
char recv_buf[100];
struct sockaddr_in addr;
if(argc !=2)
{
printf("Usage: %s <Server_name or Server_IP_address>\n", argv[0]);
exit (-1);
}
/* Create an AF_INET stream socket */
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if(sockfd < 0)
{
perror("client - socket() error" );
exit(-1);
}
else
printf("client - socket() is OK.\n" );
/* Initialize the socket address structure */
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = htons(SERVER_PORT);
/* Connect to the server */
rc = connect(sockfd, (struct sockaddr *)&addr, sizeof(struct sockaddr_in));
if(rc < 0)
{
perror("client - connect() error" );
close(sockfd);
exit(-1);
}
else
{
printf("client - connect() is OK.\n" );
printf("connect() completed successfully.\n" );
printf("Connection with %s using port %d established!\n", argv[1], SERVER_PORT);
}
/* Enter data buffer that is to be sent */
/* Send data buffer to the worker job */
//len = send(sockfd, send_buf, strlen(send_buf) + 1, 0);
/* if(len != strlen(send_buf) + 1)
{
perror("client - send() error" );
close(sockfd);
exit(-1);
}
else*/
while(1){
/* Receive data buffer from the worker job */
len = recv(sockfd, recv_buf, sizeof(recv_buf), 0);
recv_buf[len] = '\0';
if(len != strlen(send_buf) + 1)
{
perror("client - recv() error" );
close(sockfd);
exit(-1);
}
else
{
printf("client - recv() is OK.\n" );
printf("The sent message: \"%s\" successfully received by server and echoed back to client!\n", recv_buf);
printf("%d bytes received.\n", len);
printf("Enter message to be sent to server:\n" );
fgets(send_buf, sizeof send_buf, stdin);
printf("client - send() is OK.\n" );
printf("%d bytes sent.\n", len);
}
}
/* Close the socket */
close(sockfd);
return 0;
}
Server:
/**** iserver.c ****/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#define SERVER_PORT 12345
/* Run with a number of incoming connection as argument */
int main(int argc, char *argv[])
{
int i, len, num, rc;
int listen_sd, accept_sd;
/* Buffer for data */
char buffer[100];
struct sockaddr_in addr;
/* If an argument was specified, use it to */
/* control the number of incoming connections */
if(argc >= 2)
num = atoi(argv[1]);
/* Prompt some message */
else
{
printf("Usage: %s <The_number_of_client_connection else 1 will be used>\n", argv[0]);
num = 1;
}
/* Create an AF_INET stream socket to receive */
/* incoming connections on */
listen_sd = socket(AF_INET, SOCK_STREAM, 0);
if(listen_sd < 0)
{
perror("Iserver - socket() error" );
exit(-1);
}
else
// commentaire - printf("Iserver - socket() is OK\n" );
// commentaire - printf("Binding the socket...\n" );
/* Bind the socket */
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = htons(SERVER_PORT);
rc = bind(listen_sd, (struct sockaddr *)&addr, sizeof(addr));
if(rc < 0)
{
perror("Iserver - bind() error" );
close(listen_sd);
exit(-1);
}
else
// commentaire - printf("Iserver - bind() is OK\n" );
while(1){
/* Set the listen backlog */
rc = listen(listen_sd, 5);
if(rc < 0)
{
perror("Iserver - listen() error" );
close(listen_sd);
exit(-1);
}
else
// commentaire - printf("Iserver - listen() is OK\n" );
/* Inform the user that the server is ready */
// commentaire - printf("The Iserver is ready!\n" );
/* Go through the loop once for each connection */
for(i=0; i < num; i++)
{
/* Wait for an incoming connection */
// commentaire - printf("Iteration: #%d\n", i+1);
// commentaire - printf(" waiting on accept()\n" );
accept_sd = accept(listen_sd, NULL, NULL);
if(accept_sd < 0)
{
perror("Iserver - accept() error" );
close(listen_sd);
exit(-1);
}
else
// commentaire - printf("accept() is OK and completed successfully!\n" );
/* Receive a message from the client */
// commentaire - printf("I am waiting client(s) to send message(s) to me...\n" );
rc = recv(accept_sd, buffer, sizeof(buffer), 0);
if(rc <= 0)
{
perror("Iserver - recv() error" );
close(listen_sd);
close(accept_sd);
exit(-1);
}
else
printf("The message from client: \"%s\"", buffer);
/* Echo the data back to the client */
// commentaire - printf("Echoing it back to client...\n" );
if(strcmp(buffer,"toto" )==1){
printf("LE CLIENT A BIEN REPONDU TOTO\n" );
memset(buffer,'\0',101);
}
else{
printf("PAS LA BONNE REPONSE\n" );
memset(buffer,'\0',101);
}
len = rc;
rc = send(accept_sd, buffer, len, 0);
if(rc <= 0)
{
perror("Iserver - send() error" );
close(listen_sd);
close(accept_sd);
exit(-1);
}
else
printf("Iserver - send() is OK.\n" );
/* Close the incoming connection */
close(accept_sd);
}
/* Close the listen socket */
}
close(listen_sd);
return 0;
}
Merci de me donner un pti' coup de main.
