在程序中如何动态修改设备的IP地址？

发布于 2012-05-12 17:53:07 浏览：5714 订阅该版

9 个回答

bernard 2012-05-12

这家伙很懒，什么也没写！

prife 2012-05-12

这家伙很懒，什么也没写！

iwillbeback008 2012-05-12

这家伙很懒，什么也没写！

iwillbeback008 2012-05-12

这家伙很懒，什么也没写！

bernard 2012-05-14

这家伙很懒，什么也没写！

iwillbeback008 2012-05-14

这家伙很懒，什么也没写！

prife 2012-05-14

这家伙很懒，什么也没写！

iwillbeback008 2012-05-15

这家伙很懒，什么也没写！

今天写了些关于程序中修改IP地址的代码：

```

rt_thread_delete(tcpserver_tid);
tcpserver_tid = RT_NULL;
/*休眠10个OS Tick然后退出,应切换到idle线程,idle线程将执行真正的线程控制块和线程栈的删除*/
rt_thread_delay(100);

//set IP address
set_if("e0",chrIPAddress,chrGateway,chrSubnetMask);	
		
//重启TCP服务
tcp_server_startup();

```

void tcp_server_entry(void *parameter)
{
   char *recv_data;
   rt_uint32_t sin_size;
   rt_err_t result;
   int /*sock = -1, connected, */i,j,index1,index2,bNodelay,bytes_received,chrTCPTempN,SecvLen,SecvLenSY,SecvLenTCP;
   struct sockaddr_in server_addr, client_addr;

sock = -1;
	recv_data = rt_malloc(TCP_BUFFER_SIZE);
	if (recv_data == RT_NULL)
	{
		rt_kprintf("no memory
");
		goto _exit;
	}

/* create a TCP socket */
	if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1)
	{
		rt_kprintf("create socket error
");
		goto _exit;
	}

/*Winsock的Nagle延时算法将降低小数据报的发送速度,而系统默认是使用Nagle算法(Nagle算法使套接字缓冲最多200ms内的数据包,然后使用一个数据包发送它们,从而减少网络流量) */
	bNodelay = 1;
	setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char *)&bNodelay, sizeof(bNodelay));

/* initialize server address */
	server_addr.sin_family = AF_INET;
	server_addr.sin_port = htons(TCP_SERVER_PORT);
	server_addr.sin_addr.s_addr = INADDR_ANY;
	rt_memset(&(server_addr.sin_zero),8, sizeof(server_addr.sin_zero));

/* bind to server address */
	if (bind(sock, (struct sockaddr *)&server_addr, sizeof(struct sockaddr)) == -1)
	{
		rt_kprintf("bind address failed errno: %d, socket error: %d
", 
					rt_get_errno(),lwip_get_error());
		goto _exit;
   }

/* listen */
	if (listen(sock, 5) == -1)
	{
		rt_kprintf("listen error
");
		goto _exit;
	}
	rt_kprintf("
TCPServer Waiting for client on port 9527...
");

sin_size = sizeof(struct sockaddr_in);
	while(1)
	{
		/* accept client connected */
		connected = accept(sock, (struct sockaddr *)&client_addr, &sin_size);
		/* 接受返回的client_addr指向了客户端的地址信息 */
    	rt_kprintf("I got a connection from (%s , %d)
",inet_ntoa(client_addr.sin_addr),ntohs(client_addr.sin_port));

if (connected > 0)
		{
			
		           /* handle this client */
			while (1)
			{

deletenewTCP:
				/* receive data from this connection */
				bytes_received = recv(connected,recv_data, TCP_BUFFER_SIZE, 0);
				if (bytes_received <= 0)
				{
					rt_kprintf("close client connection, errno: %d, socket error: %d
", 
						rt_get_errno(),
						lwip_get_error());
					/* connection closed. */
					lwip_close(connected);
					break;
				}

//......

```

在比如原有IP地址192.168.1.6端口号9527上建立一个TCP服务[调用tcp_server_startup()]并有客户端连接上，然后程序执行以上代码把IP地址变为192.168.1.2已经成功，但是在紧接着的重启TCP服务[tcp_server_startup()]时执行bind()报以下错误：
bind address failed , errno: 98, socket error: 0;[rt_get_errno()=98,lwip_get_error()=0];

求解!