Re: [twsocket] Delphi2007,UDP, 2x packets

[brian]

Hi, I checked it out, that's quite confusing heh. I'd appreciate it if you 
could show me a simple code for a UDP wsocket to Listen; and send data back 
to the host it received from.

Thanks! 

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Re: [twsocket] Delphi2007,UDP, 2x packets

[Wilfried Mestdagh]

Hello Brian,

Not tested. This echo back a received packet from a listening UDP socket
to the other end:

var
   Buffer: array [0..1023] of char;
   Len: integer;
   Src: TSockAddrIn;
   SrcLen: integer;
begin
   SrcLen := SizeOf(Src);
   Len  := FUDPServer.ReceiveFrom(@Buffer, SizeOf(Buffer), Src, SrcLen);
   if Len  0 then
  Exit;
   Buffer[Len] := #0;
   
   // Echo packet back
   FUDPServer.SendTo(Src, SizeOf(Src), Buffer, Len);
   

---
Rgds, Wilfried [TeamICS]
http://www.overbyte.be/eng/overbyte/teamics.html
http://www.mestdagh.biz

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Re: [twsocket] Delphi2007,UDP, 2x packets

[brian]

Thanks, that's really helpful! (only missed the pointer to the buffer in 
that code)

it seems acknowledging every packet with udp before sending more turns out 
much slower than tcp 

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[twsocket] TWSocket Stop Listening After Certain Numbers of Connected Clients.

[Edward Koo]

Hi,

I wrote a server with TWSocket that receive high speed
data and then push the data to connected clients. I
did some stress test recently and found that the
server will stop accepting client after it reach
something like 500-600 concurrent clients on Windows
XP and only about 180-200 on Windows Server 2003!?

Any client attempts to connect at this point will get
a socket error 10061, this happen even if all the
previous clients are disconnected. A breakpoint to the
code shows that SocketSessionAvailable will not
trigger anymore. It's like the server listening socket
is closed but I checked with Netstat -a and it shows
that the server is still listening to the designated
port.

I tried to change WSocket_listen backlog to 200 but it
won't help also. Any idea?


   

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