My UDP server

[qwer85]

I have UDP server, which wait's for client to connect, when it happens the server processes the packet and writes processed data to file. But when i connect simultaneously 5 clients - server logs only 2-3 of them. Why this happens?

Server:

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Opt("MustDeclareVars", 1)

UDPStartup()
Global $socket = UDPBind("192.168.1.1", 65532)
If @error <> 0 Then Exit

Global $users[10][3]
For $i = 0 To UBound($users, 1) - 1
    For $k = 0 To UBound($users, 2) - 1
        $users[$i][$k] = 0
    Next
Next
Global $data

While 1
    $data = UDPRecv($socket, 1024)
    If $data <> "" Then
        If StringLeft($data, 4) = "qwer" Then
            Local $n_data = StringTrimLeft($data, 4)
            Local $IDnPass = StringSplit($n_data, "|")
            For $i = 0 To UBound($users) - 1
                Select
                    Case $users[$i][0] = 0
                        $users[$i][0] = $IDnPass[1]
                        $users[$i][1] = $IDnPass[2]
                        $users[$i][2] = TimerInit()
                        ExitLoop
                    Case $users[$i][0] = $IDnPass[1]
                        $users[$i][2] = TimerInit()
                        ExitLoop
                EndSelect
            Next
            _WriteData() ; write data into file
        EndIf
    EndIf
    For $i = 0 To UBound($users) - 1
        If $users[$i][0] <> 0 And TimerDiff($users[$i][2]) >= 10000 Then
            $users[$i][0] = 0
            $users[$i][1] = 0
            $users[$i][2] = 0
            _WriteData()
        EndIf
    Next
WEnd

Func _WriteData()
    Local $file = FileOpen("test.txt", 2)
    For $i = 0 To UBound($users) - 1
        If $users[$i][0] = 0 Then ContinueLoop
        FileWriteLine($file, $users[$i][0] & " | " & $users[$i][1] & " | " & TimerDiff($users[$i][2]))
    Next
    FileClose($file)
EndFunc

Func OnAutoItExit()
    UDPCloseSocket($socket)
    UDPShutdown()
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[qwer85]

Maybe it's because I run all these clients on same computer, a port gets overloaded?

[Kip]

use TCP

quote from Wikipedia:

UDP does not guarantee reliability or ordering in the way that TCP does, Data may arrive out of order, appear duplicated, or go missing without notice.

Edited September 19, 2007 by kip

[weaponx]

Isn't it obvious? "T" comes before "U" in the alphabet, TCP should be your first choice!