csapp书上socket的服务器和客户端的代码

客户端的代码：

#include "csapp.h"void echo(int connfd){size_t n;char buf[MAXLINE];rio_t rio;Rio_readinitb(&rio, connfd);while ((n = Rio_readlineb(&rio, buf, MAXLINE)) != 0){printf("server received %lu by66tes \n", n);printf("%s\n", buf);//Rio_writen(connfd, buf, n);}}int main(int argc, char **argv){int listenfd, connfd, port, clientlen;struct sockaddr_in clientaddr;struct hostent *hp;char *haddrp;if (argc != 2){fprintf(stderr, "usage: %s <port> \n", argv[0]);exit(0);}port = atoi(argv[1]);listenfd = Open_listenfd(port);while (1){clientlen = sizeof(clientaddr);connfd = Accept(listenfd, (SA *)&clientaddr, &clientlen);/* determine the domin name and IP address of the client. */hp = Gethostbyaddr((const char *)&clientaddr.sin_addr.s_addr, sizeof(clientaddr.sin_addr.s_addr), AF_INET);haddrp = inet_ntoa(clientaddr.sin_addr);printf("server connect to %s (%s)\n", hp->h_name, haddrp);echo(connfd);Close(connfd);}exit(0);}

这是书上的源码，很容易看明白， 这样就可以大概了解socket的基本方法。以下 运行

./echoserver 8080&

./echoclient ubuntu-64bit-compile 8080

这样就可以啦。