- #include "unp.h"
- #include <time.h>
- int main(int argc, char **argv)
- {
- int listenfd, connfd;
- struct sockaddr_in servaddr;
- char buff[MAXLINE];
- time_t ticks;
- listenfd = Socket(AF_INET, SOCK_STREAM, 0);
- bzero(&servaddr, sizeof(servaddr));
- servaddr.sin_family = AF_INET;
- servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
- servaddr.sin_port = htons(13); /* daytime server */
- Bind(listenfd, (SA *) &servaddr, sizeof(servaddr));
- Listen(listenfd, LISTENQ);
- for ( ; ; ) {
- connfd = Accept(listenfd, (SA *) NULL, NULL);
- ticks = time(NULL);
- snprintf(buff, sizeof(buff), "%.24s\r\n", ctime(&ticks));
- Write(connfd, buff, strlen(buff));
- Close(connfd);
- }
- }
socket,bind,listen 三个函数创建监听描述符
一个客户端连接由 accept 返回一个已连接描述符
该服务请端需要在 root 权限下运行
来源: http://www.bubuko.com/infodetail-2530587.html