Hi,
Here is some of my code:
'Globally held.
Public recDatagram As Byte()
Try
'Blocks until data recieved at port.
recDatagram = UDPClientListener.Receive(PacketReceivedFromIPEP)
Catch odEx As System.ObjectDisposedException
MsgBox("UDPClientListener is disposed: " & odEx.ToString)
'--
'--
End Try
Are you referring to the buffer "recDatagram" because ive not cleared it
anywhere so everytime a new datagram is received it gets copied into it. Im
assuming that whenever a new datagram is received the whatever was in
recDatagram is emptied and the new one copied into it, is that correct? What
should I do? Is the max size of this Byte array 1024 bytes?
The socket is allocated only once upon application startup.
What i was saying is that my listerner works fine for a few hours (average
300 datagrams sent and received) but suddenly it "seems" that it stops
working..... although the network packet sniffer shows a reply packet has
been sent by the 3rd party software.
All advice/assistance GREATLY appreciated.
"Paul G. Tobey [eMVP]" wrote:
> The first thing that I'd do to try to figure out what's going on is write a
> C/C++ version of my program using WinSock. Run that. Does it fail after
> the same period of time? If so, you may have run against some type of OS
> bug. I think it's more likely that the C program will never have a problem,
> though. If that's the case, look at how you are releasing the resources
> that you are allocating. Is the buffer that you're filling with the UDP
> data being released? Are you allocating the socket every time a packet is
> received? That would be a bad design and might leave you, eventually,
> without a valid socket to open, for example.
>
> Paul T.
>
> "Alex Yakhnin [MVP]" <(E-Mail Removed)> wrote in message
> news:0C0CC96A-33CC-4403-92FE-(E-Mail Removed)...
> > How does your "3rd party application" send replies? Is it over UDP as
> > well.
> > If it is, you'd need to have a listener on your side on appropriate port
> > to
> > intercept those replies.
> >
> > HTH... Alex
> >
> > --
> > Alex Yakhnin, .NET CF MVP
> > www.intelliprog.com
> > www.opennetcf.org
> >
> > "Zahid" wrote:
> >
> >> Hi,
> >>
> >> My application sends and receives data in UDP format (Byte arrays). I
> >> use a
> >> UDPClient Listener to a specific IP address (User select but starts with
> >> 192.168.*.*) and Specific port (2004).
> >>
> >> My application will work fine for a couple of hours or an average of 300
> >> send and recieves of UDP datagram packets. Then, it appears that my
> >> application sends data but the 3rd party application doesnt reply.
> >>
> >> However after further investigation it appears that the 3rd party
> >> application does send a reply packet but that my application doesnt
> >> detect
> >> it. I have used Ethersniffer network packet sniffer to determine this.
> >>
> >> What im trying to find out is that with my UDPClient do I have to clear
> >> it
> >> or something.... is there a buffer that I need to clear.... What can I do
> >> to
> >> be sure that the network side of things are fine. Im open to accept
> >> that it
> >> could be a bug in my application but I need to be sure that its not to do
> >> with the UDPClient.
> >>
> >> I can continue to send packets but will not get any replies.
> >>
> >> Any suggestions?
> >>
> >> Thanks in advance.
> >>
> >>
>
>
>
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