Network - Where does the data come from?

BlitzMax Forums/BlitzMax Programming/Network - Where does the data come from?

Tibit

(Posted 2005) [#1]

It's probably me but I just can't solve this strange problem that I got when trying to write a network lib. (I use BNet by Vertex)

I send 18bytes but the client receives over 130kbytes. I mean how can that happen?

It happens when the Client reads 1 byte, his ID. Then he reads the rest of the stream into a string (which in short is the host's name$ and info$) but somehow this string gets way huge! (131071 bytes)- which I check with
Len(StringReceived$). The Sent STring was a couple of bytes only!
Anyway this means the client stalls each time he joins. Anyone got any ideas about what it could be?

I'll keep debugging whishing for the best.

N	(Posted 2005) [#2]

....

My... PANTS!

To be honest, I have no idea.

Tibit

(Posted 2005) [#3]

Phew, found it. Don't know how it happend really. Or why it happend. Seemed like the data received was exponetially increasing depending on the data sent.

It all had to do with a WriteShort(), which should have been a WriteByte().. Grr..

Wierd bug^^

Tibit

(Posted 2005) [#4]

Obviously I didn't sole it..
When the name and Info was set = 0 it works, but as I increase the size of this string the problem arises again.

'The SEND code

WriteByte(UDP_Stream, MessageType%)	'One Byte, Max 255	This is the "type" of the msg
	WriteID( My.Net_ID% ) 'Send your id in the message
		BytesSent:+1
		If MessageData <> ""
		    For Local T = 1 To Len(MessageData$)
	              WriteByte ( UDP_Stream, Asc ( Mid$(MessageData$,T,1)  )  )  'This is the data of the msg
                    Next
		EndIf
		DebugLog"Public Message sent to Client "+C.Net_ID+"    DataLen"+Len(MessageData$) 		
	SendUDPMsg( UDP_Stream, C.IP, C.Port )'Send data stream To Computer

'----


'Receive code
		
While Not Eof(UDP_Stream) 'this reads the data bytes into a String
	StringToRead:+StringToRead + Chr$(ReadByte( UDP_Stream ))
Wend

'----

1b -> 3b
2b -> 7b
3b -> 15b
4b -> 31b
5b -> 63b

I send A1B2 and receive: AA1AA1BAA1AA1B2

Can anyone calculate (or guess) what is happening here?

EDIT -
Solved it.. OMG Could a bug be more annoying? The reason for the bug was that I went:
While not end of stream
DataString$:+ DataString + Readbyte()
Wend

Which added each string onton of itself two type + the byte..
That what happens when you get code-blind.