Specifies the states of a Transmission Control Protocol (TCP) connection.
Declaration Syntax| C# | Visual Basic |
public enum TcpState
Public Enumeration TcpState
Members| Member | Description |
|---|---|
| Unknown |
The TCP connection state is unknown.
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| Closed |
The TCP connection is closed.
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| Listen |
The local endpoint of the TCP connection is listening for a connection request from any remote endpoint.
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| SynSent |
The local endpoint of the TCP connection has sent the remote endpoint a segment header with the synchronize (SYN) control bit set and is waiting for a matching connection request.
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| SynReceived |
The local endpoint of the TCP connection has sent and received a connection request and is waiting for an acknowledgment.
|
| Established |
The TCP handshake is complete.
The connection has been established and data can be sent.
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| FinWait1 |
The local endpoint of the TCP connection is waiting for a connection termination request from the remote endpoint or for an acknowledgement of the connection termination request sent previously.
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| FinWait2 |
The local endpoint of the TCP connection is waiting for a connection termination request from the remote endpoint.
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| CloseWait |
The local endpoint of the TCP connection is waiting for a connection termination request from the local user.
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| Closing |
The local endpoint of the TCP connection is waiting for an acknowledgement of the connection termination request sent previously.
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| LastAck |
The local endpoint of the TCP connection is waiting for the final acknowledgement of the connection termination request sent previously.
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| TimeWait |
The local endpoint of the TCP connection is waiting for enough time to pass to ensure that the remote endpoint received the acknowledgement of its connection termination request.
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| DeleteTcb |
The transmission control buffer (TCB) for the TCP connection is being deleted.
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| HasFlag |
Determines whether one or more bit fields are set in the current instance.
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