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2 réponses
Salam 3ala man ittaba3a alhoda !
voici le code C d'un serveur qui repond a ce que vous voulez :
/*
** selectserver.c - a cheezy multiperson chat server
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define PORT 2225
int main(void)
{
fd_set master;
fd_set read_fds;
struct sockaddr_in myaddr;
struct sockaddr_in remoteaddr;
int fdmax;
int listener;
int newfd;
char buf[256];
int nbytes;
int yes=1;
int addrlen;
int i, j;
FD_ZERO(&master);
FD_ZERO(&read_fds);
if ((listener = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
}
//if (setsockopt(listener, SOL_SOCKET, SO_REUSEADDR, &yes,
//sizeof(int)) == -1) {
//perror("setsockopt");
//exit(1);
//}
myaddr.sin_family = AF_INET;
myaddr.sin_addr.s_addr = INADDR_ANY;
myaddr.sin_port = htons(PORT);
memset(&(myaddr.sin_zero), '\0', 8);
if (bind(listener, (struct sockaddr *)&myaddr, sizeof(myaddr)) == -1) {
perror("bind");
exit(1);
}
if (listen(listener, 10) == -1) {
perror("listen");
exit(1);
}
FD_SET(listener, &master);
fdmax = listener;
for(;;) {
read_fds = master;
if (select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1) {
perror("select");
exit(1);
}
for(i = 0; i <= fdmax; i++) {
if (FD_ISSET(i, &read_fds)) {
if (i == listener) {
addrlen = sizeof(remoteaddr);
if ((newfd = accept(listener, (struct sockaddr *)&remoteaddr,
&addrlen)) == -1) {
perror("accept");
} else {
FD_SET(newfd, &master);
if (newfd > fdmax) {
fdmax = newfd;
}
printf("selectserver: new connection from %s on "
"socket %d\n", inet_ntoa(remoteaddr.sin_addr), newfd);
}
} else {
if ((nbytes = recv(i, buf, sizeof(buf), 0)) <= 0) {
if (nbytes == 0) {
printf("selectserver: socket %d hung up\n", i);
} else {
perror("recv");
}
close(i);
FD_CLR(i, &master);
} else {
printf("------------------>salam %s\n",buf);
for(j = 0; j <= fdmax; j++) {
if (FD_ISSET(j, &master)) {
if (j != listener && j != i) {
if (send(j, buf, nbytes, 0) == -1) {
perror("send");
}
}
}
}
}
}
}
}
}
return 0;
}
voici le code C d'un serveur qui repond a ce que vous voulez :
/*
** selectserver.c - a cheezy multiperson chat server
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#define PORT 2225
int main(void)
{
fd_set master;
fd_set read_fds;
struct sockaddr_in myaddr;
struct sockaddr_in remoteaddr;
int fdmax;
int listener;
int newfd;
char buf[256];
int nbytes;
int yes=1;
int addrlen;
int i, j;
FD_ZERO(&master);
FD_ZERO(&read_fds);
if ((listener = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
}
//if (setsockopt(listener, SOL_SOCKET, SO_REUSEADDR, &yes,
//sizeof(int)) == -1) {
//perror("setsockopt");
//exit(1);
//}
myaddr.sin_family = AF_INET;
myaddr.sin_addr.s_addr = INADDR_ANY;
myaddr.sin_port = htons(PORT);
memset(&(myaddr.sin_zero), '\0', 8);
if (bind(listener, (struct sockaddr *)&myaddr, sizeof(myaddr)) == -1) {
perror("bind");
exit(1);
}
if (listen(listener, 10) == -1) {
perror("listen");
exit(1);
}
FD_SET(listener, &master);
fdmax = listener;
for(;;) {
read_fds = master;
if (select(fdmax+1, &read_fds, NULL, NULL, NULL) == -1) {
perror("select");
exit(1);
}
for(i = 0; i <= fdmax; i++) {
if (FD_ISSET(i, &read_fds)) {
if (i == listener) {
addrlen = sizeof(remoteaddr);
if ((newfd = accept(listener, (struct sockaddr *)&remoteaddr,
&addrlen)) == -1) {
perror("accept");
} else {
FD_SET(newfd, &master);
if (newfd > fdmax) {
fdmax = newfd;
}
printf("selectserver: new connection from %s on "
"socket %d\n", inet_ntoa(remoteaddr.sin_addr), newfd);
}
} else {
if ((nbytes = recv(i, buf, sizeof(buf), 0)) <= 0) {
if (nbytes == 0) {
printf("selectserver: socket %d hung up\n", i);
} else {
perror("recv");
}
close(i);
FD_CLR(i, &master);
} else {
printf("------------------>salam %s\n",buf);
for(j = 0; j <= fdmax; j++) {
if (FD_ISSET(j, &master)) {
if (j != listener && j != i) {
if (send(j, buf, nbytes, 0) == -1) {
perror("send");
}
}
}
}
}
}
}
}
}
return 0;
}
