linux下socket程式設計之時間伺服器

為網路上的使用者提供時間服務，即為網路使用者返回伺服器的當前時間；

記錄發出請求的網路使用者的ip位址（儲存到檔案中）；

編寫時間服務客戶端timeclient，該客戶端能夠向伺服器傳送時間服務請求，並把獲得的時間返回給使用者。

開發環境：fedora13，vim，gcc

timeserver.c檔案。

#include#include#include#include#include#include#include#include#include#include#define port 1234

#define backlog 5
int main()
int opt = so_reuseaddr;
setsockopt(listenfd, sol_socket, so_reuseaddr, &opt, sizeof(opt));
bzero(&server, sizeof(server));
server.sin_family = af_inet;
server.sin_port = htons(port);
server.sin_addr.s_addr = htonl(inaddr_any);
if(bind(listenfd, (struct sockaddr *)&server, sizeof(server)) == -1)
if(listen(listenfd, backlog) == -1)
addrlen = sizeof(client);
if((connectfd = accept(listenfd, (struct sockaddr *)&client, &addrlen )) == -1)
printf("timeclient's ip is %s.  ",inet_ntoa(client.sin_addr));
printf("time is %s\n",ctime(&t));
send(connectfd,(time_t *)&t,sizeof(time_t),0);
fprintf(fd,"%s  %s\n",inet_ntoa(client.sin_addr),ctime(&t));
fclose(fd);
return 1;
}

#include#include#include#include#include#include#include#include#define port 1234   /*listen port*/

int main ( int argc, char *argv)
/*get ip address*/
if((he = gethostbyname(argv[1])) == null)
if((sockfd = socket(af_inet, sock_stream, 0)) == -1)
bzero(&server, sizeof(server));
server.sin_family = af_inet;
server.sin_port = htons(port);
server.sin_addr = *((struct in_addr *)he->h_addr);
if(connect(sockfd, (struct sockaddr *)&server, sizeof(server)) == -1)
recv(sockfd,(void *)&t,sizeof(time_t),0);
printf("time is %s\n",ctime(&t));
}

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