[BUG] [modbusTCP] Socket Closing Exception

[singlebear]

win10.

The socket created by 'modbus_tcp_listen' Cannot be closed correctly by ‘_modbus_tcp_close’ or '_modbus_tcp_free'.
The TCP IP address and port are still occupied after use 'modbus_close' and 'modbus_free'.
Manually use 'closesocket ' to close the socket corresponding to the value returned by 'modbus_tcp_listen'.The modbustcp service with the same IP address and port can be started again

[modem-man-gmx]

do you talking about TCP lingering?
lingering in Winsock