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Dan · Guest

Im trying to implement Qos over udp using indy udp client component. What i
want to do is modify the ServiceType to a higher priority, but i just cant
seem to get it to work.

According to ms documentation i can use the WSAIoctl function with
controlcode SIO_SET_QOS. Using declarations from idwinsock2.pas.

Code (somewhat snipped):

-----
SERVICETYPE_CONTROLLEDLOAD = $00000002 ;

QosStruct: QOS;
QosOutPut: QOS;
ByteOutput: DWorD;

QosStruct.SendingFlowspec.ServiceType := SERVICETYPE_CONTROLLEDLOAD;

Code := WSAIoctl(IdUDPClient1.Binding.handle, SIO_SET_QOS, @QosStruct,
sizeof(QosStruct), @QosOutPut, sizeof(QosOutPut), @ByteOutput, nil, nil);

-----

The WSAIoctl function returns 0 for successful completion but when i watch
the packets in etheral it has not worked. And if i run WSAIoctl with
SIO_GET_QOS afterwards, i always get a ServiceType value of
SERVICETYPE_BESTEFFORT (1).

Any help or advice will be appreciated.