keepalive is not working on win7

[jwj15]

I use tcpclient

---

Environment
SuperSimpleTcp : v3.0.0
NET6 runtime : v6.0.8
OS : Windows7 Service Pack 1

---

Enabling the keepalive option causes an error

option --> client.Keepalive.EnableTcpKeepAlives = true;
error message --> "keepalives not supported on this platform, disabled"

If data is sent after an error, the following message is output.

disconnection detected
dispose complete

I do a connection check before sending data. but this code passes

if (client == null)
{
    log.Error("client is null");
    GetClient();
}
else if (!client.IsConnected)
{
    log.Error("client is not connected");
    client.Connect();
}

But Windows 10 and 11 work fine.

[jchristn]

Hi @jwj15 this is happening in the catch block of EnableKeepalives (see

SuperSimpleTcp/src/SuperSimpleTcp/SimpleTcpClient.cs

Line 1069 in 52ba8d1

private void EnableKeepalives()

and

SuperSimpleTcp/src/SuperSimpleTcp/SimpleTcpServer.cs

Line 1109 in 52ba8d1

private void EnableKeepalives()

). If this is happening, it's an issue with the underlying implementation in the operating system with the runtime you've selected. It is, unfortunately, not an issue that is under my control, because it's not an issue in the library.