About STM32 Network library TCP disconnect problem

[YZHIL.1]

Recently I ran into a problem with data loss when TCP was disconnected。

I used Keil's official Network library

netTCP_SendReady is unable to immediately detect that the TCP has been disconnected, resulting in data loss issues

Is there a way to speed up the netTCP_SendReady detection, or is there a better way to know that TCP is broken quickly, and I've also tried netTCP_GetState, but it's slower

Thanks,​