[lwip-users] After tcp_close PCB is still in active pcb in specific situation.

[CHASE CHENG]

Hey guys,

I'm using lwip 1.4 on ThreadX with a usb ethernet dongle,

I am using a netio program (a RAW API TCP program) for verifying throughput.

However, I found that if I plug out the ethernet dongle while netio processing,

the PCB kept in active pcb states even I called tcp_close.

I want to make tcp_close once the dongle is plugged out, and create a new PCB for processing tcp connection, but the old pcb is not released which cause my new PCB always bind failed. Do any idea? thank you.