UDP 格式错误的数据包
我使用 C# 程序进行客户端 UDP 应用程序。应用程序侦听连接，然后进行通信。
Socket udpClient = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
udpClient.Bind(new IPEndPoint(IPAddress.Any, ListenPort));
udpClient.Blocking = true;
int count = 0;
while (count == 0) udpClient.ReceiveFrom(receiveBuffer, ref ePoint);
udpClient.SendTo(data, endPoint);
udpClient.ReceiveFrom(receiveBuffer, ref ep);
...
我使用 Wireshark 来调试应用程序。问题是，一段时间后，我的应用程序开始发送格式错误的 STUN 数据包，我认为正因为如此，它们被互联网上的路由器拒绝。
问题：是否可以防止发送格式错误的 UDP/STUN 数据包？
I use C# program for client UDP application. Application listens for a connection, and then communicates.
Socket udpClient = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
udpClient.Bind(new IPEndPoint(IPAddress.Any, ListenPort));
udpClient.Blocking = true;
int count = 0;
while (count == 0) udpClient.ReceiveFrom(receiveBuffer, ref ePoint);
udpClient.SendTo(data, endPoint);
udpClient.ReceiveFrom(receiveBuffer, ref ep);
...
I use Wireshark to debug the application. The problem is that after sometime my application starts sending malformed STUN packets, and I think that because of that they get rejected by a router on the internet.
The question: is it possible to prevent sending malformed UDP/STUN packets?
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当您的应用程序发送格式错误的 UDP 数据包时，它存在错误。您的代码的最小片段只有一个 SendTo 调用。您可以添加数据内容/长度的检查功能。
顺便说一句：UDP 是无连接的。我想说，您的应用程序等待请求或某种启动命令，而不是等待连接。
When your application sends malformed UDP packets, it has a bug. The minimal fragment of your code has only one SendTo call. You can add a check function for the content/length of data.
BTW: UDP is connectionless. I would say, your application waits for a request or a kind of start command not for a connection.