码迷,mamicode.com
首页 > 其他好文 > 详细

Unix网络编程---第一次作业

时间:2015-11-24 06:16:10      阅读:239      评论:0      收藏:0      [点我收藏+]

标签:

Unix网络编程---第一次作业

 

要求:

客户端:从命令行读入服务器的IP地址;并连接到服务器;

服务器端:    接受客户的连接请求,并显示客户的IP地址和端口号。

 

实现代码:

1、客户端程序:my_client.c

#include <sys/socket.h>

#include <sys/types.h>

#include <netinet/in.h>

#include <unistd.h>

#include <stdio.h>

 

#define  UPORT 8088 /*This is the port number used by me */

#define  MAXLINE 256

 

int

main(int argc, char **argv)

{

       int                               sockfd, n;

       char                      recvline[MAXLINE + 1];

       struct sockaddr_in  servaddr;

 

       if (argc != 2){

              perror("usage: a.out <IPaddress>");

              exit(-1);

       }

 

       if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){

              perror("socket error");

              exit(-1);

       }

       

       bzero(&servaddr, sizeof(servaddr));

       servaddr.sin_family = AF_INET;

       servaddr.sin_port   = htons(UPORT);  /* daytime server */

       if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0){

              printf("inet_pton error for %s", argv[1]);

              exit(-1);

       }

 

       if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){

              perror("connect error");

              exit(-1);

       }

 

       while ( (n = read(sockfd, recvline, MAXLINE)) > 0) {

              recvline[n] =‘\0‘; // ‘\0‘ ASXII code is 0, so also can use 0;

              if (fputs(recvline, stdout) == EOF){

                     perror("fputs error");

                     exit(-1);

              }

       }

       if (n < 0)

              perror("read error");

 

       exit(0);

}

2、服务端程序:my_server.c

#include <sys/socket.h>

#include <sys/types.h>/*The funcion sizeof,socklen_t need*/

#include <netinet/in.h>/*The funcion sockaddr_in need*/

#include <unistd.h>

#include <arpa/inet.h>/*The funcion inet_ntoa need*/

#include <string.h>/*The funcion strlen need*/

 

#define  UPORT 8088 /*This is the port number used by me */

#define  MAXLINE 256

#define  LISTENQ 32

int

main(int argc, char **argv)

{

       int                               listenfd, connfd,reuse;

       struct sockaddr_in  servaddr, cliaddr;

       char                      buff[MAXLINE];

       socklen_t  addrlen;

 

       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(UPORT);       /* server port setting */

 

      

        if( setsockopt(listenfd,SOL_SOCKET,SO_REUSEADDR,&reuse,sizeof(reuse))==-1){

              perror("There is an error occured when the program set REUSEADDR symbol");

              return -1;

       }

 

 

       if(bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr))==-1){

              perror("%s\r\n","bind error");

              exit(-1);

       }

      

       listen(listenfd, LISTENQ);

 

       addrlen=sizeof(cliaddr);

       for ( ; ; ) {

              if((connfd = accept(listenfd, (struct sockaddr *) &cliaddr, &addrlen))==-1){

                     perror("%s\r\n","An error occured while tring to creat a connfd! ");

                     exit(-1);

              }

               snprintf(buff, sizeof(buff), "%s %s:%d\r\n","The connection is successful, the ip address and port you are using are",inet_ntoa(cliaddr.sin_addr),cliaddr.sin_port );

printf("the new connection address is:%s:%d\r\n", inet_ntoa(cliaddr.sin_addr), cliaddr.sin_port);

                write(connfd, buff, strlen(buff));

              //send(connfd,"ok\n",4,0);

              close(connfd);

       }

}

运行截图

编译:gcc my_client.c -o my_client

gcc my_server.c -o my_server

服务端运行:./my_server

客户端运行:./my_client 192.168.1.119

本实验是在两台虚拟机上操作,服务端ip为192.168.1.119,客户端ip为192.168.1.120

 

1、客户端:

 技术分享

技术分享

2、服务端:

 技术分享

 技术分享

 总结

1、 注意细节,免走弯路

2、 了解原理,举一反三

Unix网络编程---第一次作业

标签:

原文地址:http://www.cnblogs.com/lwhp/p/4990246.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!