Hi All,
I'm currently at a customer site and I need to receive data sent with
UDP broadcast.
I've done this quite often without problems, but at the moment I have a
problem of which I'm not sure where to look.
(As always) I've set up my receiving socket like this:
fUDPServer := TWSocketServer.Create(nil);
fUDPServer.Proto := 'udp';
fUDPServer.Port := PORT;
fUDPServer.Addr := '0.0.0.0';
fUDPServer.OnDataAvailable := OnUDPDataAvailable;
fUDPServer.Listen();
I do not receive the data sent at all, I _do_ see the data with Wire Shark.
After some testing (making a UDP broadcasting and listening client self)
I've found that I only receive UDP broadcasted messages sent to
255.255.255.255.
Unfortunately, the message I need to receive are sent to x.x.x.255 (only
the last byte of the IP address is set to 255). I also see this in Wire
Shark.
If I sent a broadcast myself to 255.255.255.255 I receive it in my own
UDP listener, if I send it to x.x.x.255 I do not receive it in my own
listener.
Is there any way to receive this data using ICS or does anybody else
have a good tip in which direction to search?
Here a log line of Wire Shark in which you can see Wire Shark does
receive this data: 564 0.901067 10.68.112.66 10.68.112.255 UDP Source
port: 1120 Destination port: 1120
Kind regards,
Merijn
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