Re: [lwip-users] lwip netconn with ethernet disconnect

[Hugh Reynolds]

Jim,

In my application each time I call LWIP I check the connection state reported 
by the PHY.
I have a state machine that handles cable up/down.
If it is down, when it comes back I re-init LWIP and anything that has been 
hanging on the line.

That works...every time...is there a better way?

Regards

Hugh

-----Original Message-----
From: lwip-users <address@hidden> On Behalf Of jim
Sent: 08 November 2018 01:46
To: address@hidden
Cc:
Subject: [lwip-users] lwip netconn with ethernet disconnect

Hi,

I have the lwip system working and it is awesome!

I am wondering how to recover from cable disconnect in my application.
On cable disconnect, the driver calls tcpip_callback_with_block which
ends up successfully entering netif_set_link_down.

My application is currently waiting on the receive mailbox through
netconn_recv.

What is the expected behavior when the cable is removed? I would have
expected the blocking  netconn_recv to return with an error.

Thanks in advance for any help.
Jim



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