Ultima modifica:
salve community,
teoricamente con questo client e server posso comunicare con due computer collegati alla stessa rete locale?
Client:
Server:
teoricamente con questo client e server posso comunicare con due computer collegati alla stessa rete locale?
Client:
Codice:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
int main(int argc, char **argv)
{
int sockfd, n;
char recvline[1025] ;
struct sockaddr_in servaddr;
if (argc != 2) {
fprintf(stderr,"usage: %s <IPaddress>\n",argv[0]);
exit (1);
}
if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
fprintf(stderr,"socket error\n");
exit (1);
}
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(1024);
if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) < 0) {
fprintf(stderr,"inet_pton error for %s\n", argv[1]);
exit (1);
}
if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0) {
fprintf(stderr,"connect error\n");
exit(1);
}
while ( (n = read(sockfd, recvline, 1024)) > 0) {
recvline[n] = 0;
if (fputs(recvline, stdout) == EOF) {
fprintf(stderr,"fputs error\n");
exit(1);
}
}
if (n < 0) {
fprintf(stderr,"read error\n");
exit(1);
}
exit(0);
}Server:
Codice:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <time.h>
int main(int argc, char **argv)
{
int listenfd, connfd;
struct sockaddr_in servaddr;
char buff[4096];
time_t ticks;
if ( ( listenfd = socket(AF_INET, SOCK_STREAM, 0) ) < 0 ) {
perror("socket");
exit(1);
}
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
servaddr.sin_port = htons(1024);
if ( bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0 ) {
perror("bind");
exit(1);
}
if ( listen(listenfd, 1024) < 0 ) {
perror("listen");
exit(1);
}
for ( ; ; ) {
if ( ( connfd = accept(listenfd, (struct sockaddr *) NULL, NULL) ) < 0 ) {
perror("accept");
exit(1);
}
ticks = time(NULL);
snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
if ( write(connfd, buff, strlen(buff)) != strlen(buff)) {
perror("write");
exit(1);
}
close(connfd);
}
}