Native Transport with 4G connection

[Babis Michael]

Hello,

I getting more often disconnections (ondisconnect event will occur) with a 4G connection and native transport.

Any ideas how to avoid this ?

Thank you

[Babis Michael]

Changing SetKeepAlive to 20 instead of 5 seems to resolve the problem … Keep testing …

function TkbmMWAbstractSocket.SetKeepAlive(ASocket:THandle):Integer;
begin
//Result:=TkbmMWSocketAPI.SetKeepAlive(ASocket,5,3,5);
Result:=TkbmMWSocketAPI.SetKeepAlive(ASocket,20,3,5);
end;

btw, It would be nice to have it on a property or something to be able to set socket options.

[Babis Michael]

Nope, changing keepalive values didn’t help!

[Babis Michael]

The issue exists with wifi connections too. Random few (2-4) disconnection per day.
Anything that i can debug ?

Thank you

[kimbomadsen]

Hi,

My guess is that Indy do not detect disconnection until the time when you try to send something due to it being a blocking non async transport, while the native transports are pure async transports, and any changes from the stack will be signalled back as soon as possible.

/Kim

[Babis Michael]

I found the issue. It’s VerifyTransfer. When it’s enabled it throws randomly an Invalid Data error and Disconnects.

I disable atm and no more random disconnections.

[Author]

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