Streamreader format issue

Question

I have created a UDP client and it works great. The data is coming back in the correct format (verified through wireshark). The problem is the format I receive from streamreader is not what I expected.

Here is the code

private async void OnMessageReceived(DatagramSocket sender,     
 DatagramSocketMessageReceivedEventArgs args)
    {
        Debug.WriteLine("message recv");
        var result = args.GetDataStream();

        var resultStream = result.AsStreamForRead(1024);
        using (var reader = new StreamReader(resultStream))
        {
            string text = await reader.ReadToEndAsync();
            Debug.WriteLine(text);
        }
    }

Here is the wireshark data

00 00 ff ff

Here is the text that is generated when I run my code

"?\0\u0002\0?\0\0d\0\0\u0001\u0001\0\0??"

I am assuming its a formatting issue.

Very unclear what you expect to get out of `00 00 ff ff` bytes as a string. Consider providing [MCVE] - inline data you receive as byte array and also show expected output along with what you get. — Alexei Levenkov, Jul 26 '16 at 03:40
From your expected result it looks like your data is binary stream. Why StreamReader? — bansi, Jul 26 '16 at 03:47
@user3363744: As a string... using what encoding? UTF-8, UTF-16, UTF-32 would all interpret those 4 bytes differently (and there are many other encodings for string data). — Eric J., Jul 26 '16 at 04:39

score 0 · Answer 1 · edited May 23 '17 at 11:58

0

Have a look at this post: Extract Server Name Indication (SNI) from TLS client hello

In particular:

The host is utf8 encoded and readable when you utf8 enocde the buffer.
Theres one byte before the host, that determines it's length.

edited May 23 '17 at 11:58

Community

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answered Jul 26 '16 at 03:44

Moustachio

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Streamreader format issue

1 Answers1