Winsock error 10054 is "Connection reset by peer", or "An existing connection was forcibly closed by the remote host". The error means exactly what it says - the remote host closed the connection unexpectedly. This happens when a connection is aborted, and there is no tcp disconnection handshake (fin, fin ack, ack) , but instead a rst (reset) flag is sent. A reset flag aborts the connection, and can be sent when:
- The device is suddenly stopped, rebooted, or loses its network connection.
- The device uses a "hard close". With IP*Works! a hard close never occurs unless you specifically set the Linger property (IPPort, IPDaemon) to false.
- A "half-open connection" state occurs. That is, when one device not been receiving acknowledgements of the data it has sent, or it receives acknowledgement for an unrecognized sequence or ack number, it will send a rst flag to reset the connection. This particular case could have a variety of its own causes, such as misconfigured proxy/firewall or network quality issues resulting in too many dropped packets.
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Winsock Error 10053
Winsock Error 10053: Part 2
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