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Re: [lwip-users] lwIP 1.4.1 server's SYN flood hang, no backlog


From: address@hidden
Subject: Re: [lwip-users] lwIP 1.4.1 server's SYN flood hang, no backlog
Date: Tue, 02 Sep 2014 19:51:47 +0200
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

Tomek wrote:
In such a case, should it return or stay in lwip_accept (as described above)?

That's a good question. Keeping the 'should' aside, it will stay in lwip_accept as it is just waiting on an mbox there: if nothing gets put into the mbox (because new connections cannot be created/out of memory), it will just keep waiting. To start debugging this, taking a look at lwip_stats (especially all the 'err' members) might help.

Simon



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