《UNIX网络编程》 1-白红宇

《UNIX网络编程》 1

阅读量：6643 次

发布时间：2019-06-25

本文共 1733 字，大约阅读时间需要 5 分钟。

1、安装 daytime 服务：

apt-get install xinetd

chmod 777 /etc/xinetd.d/daytime

vim /etc/xinetd.d/daytime

把两个 disable = yes ,改成 disable = no

/etc/init.d/xinetd restart

2、timeserver.cpp:

#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          #define LISTENQ 1024int main(int argc, char** argv){    int listenfd,connfd;    sockaddr_in servaddr;    char buff[1024];    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(2013);    bind(listenfd,(sockaddr*)&servaddr,sizeof(servaddr));    listen(listenfd,LISTENQ);    for(;;)    {           connfd = accept(listenfd,(sockaddr*)NULL,NULL);        ticks = time(NULL);        snprintf(buff,sizeof(buff),"%.24s\r\n",ctime(&ticks));        write(connfd,buff,strlen(buff));    //#include 
          
            close(connfd); } }

3、timeclient.cpp:

#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          int main(int argc, char **argv){    int     sockfd,n;    char    recvline[1024];    sockaddr_in servaddr;       //#include 
          
            if(argc != 2) { std::cout<<"usage: a.out 
           
            "<
            
             < 0) //#include 
             
               { std::cout<<"socket error."<
              
                servaddr.sin_family = AF_INET; servaddr.sin_port = htons(2013); if(inet_pton(AF_INET,argv[1],&servaddr.sin_addr) <= 0) // #include 
               
                 { std::cout<<"inet_pton error"<
                
                  0) { recvline[n] = 0; if(fputs(recvline, stdout) == EOF) //#include 
                 
                   { std::cout<<"fputs error"<