Re: [lwip-users] Half-Open detecting

[Steven Woody]

On 21 April 2011 22:04, Kieran Mansley <address@hidden> wrote:
> On Thu, 2011-04-21 at 21:45 +0800, Steven Woody wrote:
>>
>> I was reading the code, my understand is:  when a new SYN comes, my
>> old pcb must be in active pcbs list, so the new coming SYN will not
>> get matched in this list, and it also impossible getting match in
>> listen queue or tw queue. So, this SYN will be dropped.  Am I
>> understand right?
>
> An incoming SYN where you have nothing that matches in the
> tcp_listen_pcbs listen will get (I think, from memory) a TCP reset
> packet sent in response.  If you want to be notified of the SYN you have
> to have a listening PCB.

What mean I have to have a listening PCB?  I had ever had it, but it
comes a active pcb, when the tcp_accept() get called and succeed.

>
> Kieran
>
>
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