I need urgent help!

[Inf0Byt3]

Hi guys, i need some help from you. I am making a network related app but i've got a big big problem. I manage all the events (the network ones and the window ones) in the main loop. I am using the code i posted in the Tips and Tricks section, the one to send/receive files. The problem is the callback of the send/receive procedures. If i don't use the procedures in a thread and call them normally, the window freezes. If i thread them, it works, except for the packet delivery (the received files are incomplete). What can i do to manage the events correctly? Please help!

[Dreglor]

could you post some code, it would help explain more about the problem right now i can't heads or tails about it

[Inf0Byt3]

Well, i really cannot show you the code because it's very big (3000+) lines of code and it's all built around this event-handling stuff. It seems that the file transfer loop must be made continuous, because it send the file at once, in one piece. If i add a WindowEvent() in it, it misses packets, so the only thing i can do is to try modify the send/receive procedures. Is there any other solution for this?

[Tranquil]

I know your problem. As I wrote my first network routines I had the same problem.

You need to check the Result of Send_() / SendNetworkData() and recv_() / ReceiveNetworkData().

Send_() sometimes returns a #SOCKET_Error which indicates a blocking host. That means that you have to resend your message again and again till it is completely transfered. Send_() and recv_() also returns the number of bytes transfered. Check for it. In my own Fileprotocol I splitted a file in parts of 4096 Bytes. On sending it, I added a small header to the packet which contains the packet-size so that I know the expected packetsize on the destination side. TCP/IP sometimes splits messages, so you have to call recv_() as long as your data is complete.

Its hardly to say what it's your problem without a source. But this is what you have to check for. Mostly, localhost actions works fine couse the socket is mostly not in blocking state.

Mike

[Inf0Byt3]

\Yup, that's exactly what i wanted to say about this! I allmost done it, except for the fact that SendNetworkData returns -1 in the file transmission loop. That's something i've got to fix . BTW, is there a chance that you have some procedures for correctly sending/receiving a buffer? I can't make mine work at all . Ah, and i found a simple solution for my problem... Pseudocode:

Code: Select all

{ 
  Procedure handleTransfers()
  ;Send the next packet of the file
}

{
;This is the main loop
 Call handleTransfers()
 Do the window handling stuff after handleTransfers() returns
}