Re: [lwip-users] Browser finishes every HTTP GET request with a ACK RST, why ?

[address@hidden]

Am 22.09.2021 um 08:52 schrieb Info:
> Does nobody have the time to give me some advise where the problem could
> be ?

Sorry, I don't have an idea what's wrong here.

Regards,
Simon

>
> At least to understand the main problem I need some help.
> In the Wireshark capture file at line number 245 is a TCP frame from the
> web browser with the [SYN] flag set. Normally the web server would
> answer with [SYN, ACK]. But for some reason the web server answer only
> with [ACK] (line number 246 in the capture file). And from this point on
> the communication with the web server is disturbed.
>
> Any help would really be very welcome.
>
> Kind regards
> Roland
>
>
> Am 15.09.21 um 15:37 schrieb Info:
>> Hi
>>
>> I'm using lwIP (2.1.3-RC1) with the httpd web server from the apps
>> directory in my embedded application. After loading a web content from
>> the web server a periodic communication starts from the web browser
>> that opened the website. This all works, but after a view minutes the
>> periodic communication gets broken (the web server/lwIP stack itself
>> does not crash). After a reload of the web site the periodic
>> communication is established again for a view minutes.
>>
>> In the attached Wireshark capture file I can see many frames (from the
>> web browser) with the set ACK RST flags. For me it not clear why the
>> web browser sends this frames and if it is the reason for the broken
>> periodic communication ? Any help and maybe some explanation would be
>> very welcome.
>>
>> I also activated the debugging output and the internal lwIP asserts,
>> but this did not help me to track down the problem. The web server
>> does not support encryption.
>>
>> The lwIP uses FreeRTOS with the sys_arch files found in the contrib
>> package.
>>
>> IPs used in the Wireshark capture : The web server uses 192.168.3.131
>> and the client (web browser) 192.168.10.103 .
>>
>> Thank you very much for any help
>> Roland
>>
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>
>
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