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Shutting Down and Closing a TCP Socket
Part of the FreeRTOS+TCP Networking Tutorial

A TCP socket that is not connected can be closed using the FreeRTOS_closesocket() API function.

A TCP socket that is connected should not be closed until the connection has been shut down. To gracefully shut down a socket first call FreeRTOS_shutdown(), then wait for read attempts on the socket to return FREERTOS_EINVAL, indicating that the socket is no longer connected.

The source code examples on both the Sending TCP Data and the Receiving TCP Data pages demonstrate a connected socket being shut down then closed.


<< Back to the RTOS TCP networking tutorial index


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