Hello Wilfried,
thank you for your help.
I've changed my code but the problem persists. Internally RecvFrom is
Result := DoRecvFrom(FHSocket, Buffer^, BufferSize, 0, From, FromLen);
if Result < 0 then
FLastError := WSocket_Synchronized_WSAGetLastError
else
FReadCount := FReadCount + Result;
Result is -1 and FLastError is 10014. And the event OnDataAvailable is
triggered infinitely.
In ICS Faq this error code is WSAEFAULT 10014 Bad address.
Why it works fine with Receive but not with ReceiveFrom?
There is another way to obtain the IP source?
My new OnDataAvailable code is
{
int rec, FromIPLen;
TSockAddrIn FromIP;
char block[TAM_BUFFER]; //TAM_BUFFER 8192
std::string frame;
if (Error == 0)
{
rec = server->ReceiveFrom(block, sizeof(block), FromIP,
FromIPLen);
//rec = server->Receive(block, sizeof(block));
if(rec > 0)
{
frame.assign(block, rec);
LOGIN("Received PORT:%s, %d.", frame.c_str(), rec);
}
}
}
Thanks for all help.
-----Mensaje original-----
De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
nombre de Wilfried Mestdagh
Enviado el: jueves, 13 de septiembre de 2007 13:18
Para: ICS support mailing
Asunto: Re: [twsocket] UDP ReceiveFrom error
Hello Lorenzo,
You only can call Receive or ReceiveFrom 1 time in OnDataAvailable.
Don't loop in it as in your example. This could be the trouble. If you
don't have received all available data then OnDataAvailable will fire
again and there you receive the rest.
However with UDP packet bounds are preserved, so you will receive the
whole packet at once. Be sure your receiving buffer is large enough.
The MultiThreaded is nececary yes.
Also be sure you create and destroy TWSocket in the Execute method of
the thread. If you do not you have a false thread wich can also cause
troubles.
---
Rgds, Wilfried [TeamICS]
http://www.overbyte.be/eng/overbyte/teamics.html
http://www.mestdagh.biz
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