UDP實現伺服器和客戶端的通訊

一 服務端

#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include char rbuf[50];  

int main()  
//設定埠復用  
setsockopt(sockfd,sol_socket,so_reuseaddr,&on,sizeof(on));   
//繫結位址資訊，ip資訊  
ret = bind(sockfd,(struct sockaddr*)&saddr,sizeof(struct sockaddr));  
if(ret<0)  
socklen_t  val = sizeof(struct sockaddr);  
//迴圈接收客戶端發來的訊息  
while(1)  
printf("the data :%s\n",rbuf);  
bzero(rbuf,50);  
}  //關閉udp套接字，這裡不可達的。  
close(sockfd);  
return 0;  
}

#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include char wbuf[50];  

int main()  
//設定埠復用  
setsockopt(sockfd,sol_socket,so_reuseaddr,&on,sizeof(on));  
//迴圈傳送資訊給服務端  
while(1)  
bzero(wbuf,50);  
}  close(sockfd);  
return 0;  
}

1 先啟動服務端

[root@localhost test]# g++ test.cpp -o test

[root@localhost test]# ./test
waiting data

[root@localhost test]# g++ client.cpp -o client

[root@localhost test]# ./client
please enter data:
明天你來嗎？

[root@localhost test]# ./test

waiting data
the data :明天你來嗎？
waiting data

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