On 9/29/2014 3:02 PM, Denis wrote:
Hi. I have wrote a background program for Linux for discovering machines in a network using udp. The program is necessary because the machines can have an address in a unknown network and I must find them.This is the server side program: TBSUdpSocket.bind('255.255.255.255', '65534');if TBSUdpSocket.LastError<> 0 then WriteLn(TBSUdpSocket.LastErrorDesc) else beginwhile not Terminated do begin StringIn:= TBSUdpSocket.RecvPacket(1000); And this is the client side: TBSUdpSocket.CreateSocket; TBSUdpSocket.EnableBroadcast(true); TBSUdpSocket.Connect('255.255.255.255', '65534'); TBSUdpSocket.SendString('_?'+ #10); TBSUdpSocket.Connect('255.255.255.255', '65534');The program can discover machines only if the machines are in the same network of the client.How can I find machines in a different network (multicast)?
You have to scan over all Internet IP addresses. There is no other way (fortunatelly).
-- Dalibor Toman
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