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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