SystemTcpStatistics.cs

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using System.Net.Sockets;
 
namespace System.Net.NetworkInformation;
 
internal sealed class SystemTcpStatistics : TcpStatistics
{
    private readonly global::Interop.IpHlpApi.MibTcpStats _stats;
 
    public override long MinimumTransmissionTimeout => _stats.minimumRetransmissionTimeOut;
 
    public override long MaximumTransmissionTimeout => _stats.maximumRetransmissionTimeOut;
 
    public override long MaximumConnections => _stats.maximumConnections;
 
    public override long ConnectionsInitiated => _stats.activeOpens;
 
    public override long ConnectionsAccepted => _stats.passiveOpens;
 
    public override long FailedConnectionAttempts => _stats.failedConnectionAttempts;
 
    public override long ResetConnections => _stats.resetConnections;
 
    public override long CurrentConnections => _stats.currentConnections;
 
    public override long SegmentsReceived => _stats.segmentsReceived;
 
    public override long SegmentsSent => _stats.segmentsSent;
 
    public override long SegmentsResent => _stats.segmentsResent;
 
    public override long ErrorsReceived => _stats.errorsReceived;
 
    public override long ResetsSent => _stats.segmentsSentWithReset;
 
    public override long CumulativeConnections => _stats.cumulativeConnections;
 
    internal SystemTcpStatistics(AddressFamily family)
    {
        uint tcpStatisticsEx = global::Interop.IpHlpApi.GetTcpStatisticsEx(out _stats, family);
        if (tcpStatisticsEx != 0)
        {
            throw new NetworkInformationException((int)tcpStatisticsEx);
        }
    }
}