[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [lwip-users] One active TCP connection at a time

From: Jeffrey Nichols
Subject: Re: [lwip-users] One active TCP connection at a time
Date: Wed, 6 Nov 2019 08:56:00 -0500
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0

Hi Simon,

I think that the issue was that I was calling tcp_close() in tcp_err callback. At least I haven't seen it since I fixed that.

I had a similar deadlocking issue that I tracked down to running out of tcp pcbs, which I fixed by increasing MEMP_NUM_TCP_PCB from 5 to 30.

Everything seems to be stable now.


On 11/4/2019 3:30 PM, address@hidden wrote:
Am 31.10.2019 um 20:59 schrieb Jeffrey Nichols:
Replying to myself here. This did indeed cause issues.

Calling tcp_close() on the listening pcb inside the tcp_accept callback
I occasionally get a deadlock inside tcp_remove_listener(), where the
linked list is circular: pcb->next is equal to pcb.

Anyone have any ideas for how to debug/fix this?

That should not happen. When getting such circular lists, most probably
a threading issue is the cause.


lwip-users mailing list

reply via email to

[Prev in Thread] Current Thread [Next in Thread]