Chinaunix首页 | 论坛 | 博客
  • 博客访问: 2224811
  • 博文数量: 505
  • 博客积分: 1552
  • 博客等级: 上尉
  • 技术积分: 2514
  • 用 户 组: 普通用户
  • 注册时间: 2007-09-23 18:24
文章分类

全部博文(505)

文章存档

2019年(12)

2018年(15)

2017年(1)

2016年(17)

2015年(14)

2014年(93)

2013年(233)

2012年(108)

2011年(1)

2009年(11)

分类: LINUX

2014-07-20 21:47:15


通过TCP协议,用C语言实现的同步聊天程序,注释写的比较详细,个人觉得对字符串处理比较充分,能够正常编译运行,拿出来和大家分享一下!

1、客户端源代码:

  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. #include <errno.h>
  5. #include <sys/socket.h>
  6. #include <arpa/inet.h>
  7. #include <netinet/in.h>
  8. #include <sys/types.h>
  9. #include <unistd.h>

  10. #define BUFLEN 10

  11. int main(int argc, char **argv)
  12. {
  13.     int sockfd;
  14.     struct sockaddr_in s_addr;
  15.     socklen_t len;
  16.     unsigned int port;
  17.     char buf[BUFLEN];    
  18.     
  19.     /*建立socket*/
  20.     if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1){
  21.         perror("socket");
  22.         exit(errno);
  23.     }else
  24.         printf("socket create success!\n");

  25.     /*设置服务器端口*/    
  26.     if(argv[2])
  27.         port = atoi(argv[2]);
  28.     else
  29.         port = 4567;
  30.     /*设置服务器ip*/
  31.     bzero(&s_addr, sizeof(s_addr));
  32.     s_addr.sin_family = AF_INET;
  33.     s_addr.sin_port = htons(port);
  34.     if (inet_aton(argv[1], (struct in_addr *)&s_addr.sin_addr.s_addr) == 0) {
  35.         perror(argv[1]);
  36.         exit(errno);
  37.     }
  38.     /*开始连接服务器*/    
  39.     if(connect(sockfd,(struct sockaddr*)&s_addr,sizeof(struct sockaddr)) == -1){
  40.         perror("connect");
  41.         exit(errno);
  42.     }else
  43.         printf("conncet success!\n");
  44.     
  45.     while(1){
  46.         /******接收消息*******/
  47.         bzero(buf,BUFLEN);
  48.         len = recv(sockfd,buf,BUFLEN,0);
  49.         if(len > 0)
  50.             printf("服务器发来的消息是:%s,共有字节数是: %d\n",buf,len);
  51.         else{
  52.             if(len < 0 )
  53.                 printf("接受消息失败!\n");
  54.             else
  55.                 printf("服务器退出了,聊天终止!\n");
  56.             break;    
  57.         }
  58.     _retry:    
  59.         /******发送消息*******/    
  60.         bzero(buf,BUFLEN);
  61.         printf("请输入发送给对方的消息:");
  62.         /*fgets函数:从流中读取BUFLEN-1个字符*/
  63.         fgets(buf,BUFLEN,stdin);
  64.         /*打印发送的消息*/
  65.         //fputs(buf,stdout);
  66.         if(!strncasecmp(buf,"quit",4)){
  67.             printf("client 请求终止聊天!\n");
  68.             break;
  69.         }
  70.         /*如果输入的字符串只有"\n",即回车,那么请重新输入*/
  71.         if(!strncmp(buf,"\n",1)){
  72.             printf("输入的字符只有回车,这个是不正确的!!!\n");
  73.             goto _retry;
  74.         }
  75.         /*如果buf中含有'\n',那么要用strlen(buf)-1,去掉'\n'*/    
  76.         if(strchr(buf,'\n'))
  77.             len = send(sockfd,buf,strlen(buf)-1,0);
  78.         /*如果buf中没有'\n',则用buf的真正长度strlen(buf)*/    
  79.         else
  80.             len = send(sockfd,buf,strlen(buf),0);
  81.         if(len > 0)
  82.             printf("消息发送成功,本次共发送的字节数是:%d\n",len);            
  83.         else{
  84.             printf("消息发送失败!\n");
  85.             break;            
  86.         }
  87.     }
  88.     /*关闭连接*/
  89.     close(sockfd);

  90.     return 0;
  91. }

2、服务器源代码:

  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. #include <errno.h>
  5. #include <sys/socket.h>
  6. #include <arpa/inet.h>
  7. #include <netinet/in.h>
  8. #include <sys/types.h>
  9. #include <unistd.h>

  10. #define BUFLEN 10

  11. int main(int argc, char **argv)
  12. {
  13.     int sockfd, newfd;
  14.     struct sockaddr_in s_addr, c_addr;
  15.     char buf[BUFLEN];
  16.     socklen_t len;
  17.     unsigned int port, listnum;
  18.     
  19.     /*建立socket*/
  20.     if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1){
  21.         perror("socket");
  22.         exit(errno);
  23.     }else
  24.         printf("socket create success!\n");
  25.     /*设置服务器端口*/    
  26.     if(argv[2])
  27.         port = atoi(argv[2]);
  28.     else
  29.         port = 4567;
  30.     /*设置侦听队列长度*/
  31.     if(argv[3])
  32.         listnum = atoi(argv[3]);
  33.     else
  34.         listnum = 3;
  35.     /*设置服务器ip*/
  36.     bzero(&s_addr, sizeof(s_addr));
  37.     s_addr.sin_family = AF_INET;
  38.     s_addr.sin_port = htons(port);
  39.     if(argv[1])
  40.         s_addr.sin_addr.s_addr = inet_addr(argv[1]);
  41.     else
  42.         s_addr.sin_addr.s_addr = INADDR_ANY;
  43.     /*把地址和端口帮定到套接字上*/
  44.     if((bind(sockfd, (struct sockaddr*) &s_addr,sizeof(struct sockaddr))) == -1){
  45.         perror("bind");
  46.         exit(errno);
  47.     }else
  48.         printf("bind success!\n");
  49.     /*侦听本地端口*/
  50.     if(listen(sockfd,listnum) == -1){
  51.         perror("listen");
  52.         exit(errno);    
  53.     }else
  54.         printf("the server is listening!\n");
  55.     while(1){
  56.         printf("*****************聊天开始***************\n");
  57.         len = sizeof(struct sockaddr);
  58.         if((newfd = accept(sockfd,(struct sockaddr*) &c_addr, &len)) == -1){
  59.             perror("accept");        
  60.             exit(errno);
  61.         }else
  62.             printf("正在与您聊天的客户端是:%s: %d\n",inet_ntoa(c_addr.sin_addr),ntohs(c_addr.sin_port));
  63.         while(1){
  64.         _retry:
  65.             /******发送消息*******/
  66.             bzero(buf,BUFLEN);
  67.             printf("请输入发送给对方的消息:");
  68.             /*fgets函数:从流中读取BUFLEN-1个字符*/
  69.             fgets(buf,BUFLEN,stdin);
  70.             /*打印发送的消息*/
  71.             //fputs(buf,stdout);
  72.             if(!strncasecmp(buf,"quit",4)){
  73.                 printf("server 请求终止聊天!\n");
  74.                 break;
  75.             }
  76.             /*如果输入的字符串只有"\n",即回车,那么请重新输入*/
  77.             if(!strncmp(buf,"\n",1)){
  78.                 printf("输入的字符只有回车,这个是不正确的!!!\n");
  79.                 goto _retry;
  80.             }    
  81.             /*如果buf中含有'\n',那么要用strlen(buf)-1,去掉'\n'*/            
  82.             if(strchr(buf,'\n'))
  83.                 len = send(newfd,buf,strlen(buf)-1,0);
  84.             /*如果buf中没有'\n',则用buf的真正长度strlen(buf)*/    
  85.             else
  86.                 len = send(newfd,buf,strlen(buf),0);
  87.             if(len > 0)
  88.                 printf("消息发送成功,本次共发送的字节数是:%d\n",len);            
  89.             else{
  90.                 printf("消息发送失败!\n");
  91.                 break;            
  92.             }
  93.             /******接收消息*******/
  94.             bzero(buf,BUFLEN);
  95.             len = recv(newfd,buf,BUFLEN,0);
  96.             if(len > 0)
  97.                 printf("客户端发来的信息是:%s,共有字节数是: %d\n",buf,len);
  98.             else{
  99.                 if(len < 0 )
  100.                     printf("接受消息失败!\n");
  101.                 else
  102.                     printf("客户端退出了,聊天终止!\n");
  103.                 break;        
  104.             }
  105.         }
  106.         /*关闭聊天的套接字*/
  107.         close(newfd);
  108.         /*是否退出服务器*/
  109.         printf("服务器是否退出程序:y->是;n->否? ");
  110.         bzero(buf, BUFLEN);
  111.         fgets(buf,BUFLEN, stdin);
  112.         if(!strncasecmp(buf,"y",1)){
  113.             printf("server 退出!\n");
  114.             break;
  115.         }
  116.     }
  117.     /*关闭服务器的套接字*/
  118.     close(sockfd);
  119.     return 0;
  120. }

3、编译源代码:
new@new-desktop:~/linux/c$ gcc -Wall sync-client.c -o sync-client
new@new-desktop:~/linux/c$ gcc -Wall sync-server.c -o sync-server

4、运行服务器程序:
new@new-desktop:~/linux/c$ ./sync-server 127.0.0.1 4567
socket create success!
bind success!
the server is listening!
*****************聊天开始***************
正在与您聊天的客户端是:127.0.0.1: 48639
请输入发送给对方的消息:client
消息发送成功,本次共发送的字节数是:6
客户端发来的信息是:server,共有字节数是: 6
请输入发送给对方的消息:

5、运行客户端程序:
new@new-desktop:~/linux/c$ ./sync-client 127.0.0.1 4567
socket create success!
conncet success!
服务器发来的消息是:client,共有字节数是: 6
请输入发送给对方的消息:server
消息发送成功,本次共发送的字节数是:6
阅读(1013) | 评论(0) | 转发(0) |
给主人留下些什么吧!~~