[lwip-devel] [bug #50892] lwip send HTTP/1.0 200 OK with content length and content of file which cause FIN, ACK from browser

[Dmitry]

URL:
  <http://savannah.nongnu.org/bugs/?50892>

                 Summary: lwip send HTTP/1.0 200 OK with content length and
content of file which cause FIN, ACK from browser
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: gdi
            Submitted on: Fri 28 Apr 2017 12:08:52 PM UTC
                Category: TCP
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: git head

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Details:

I'm trying to upgrade lwip 1.4.1 to 2.0.x with httpserver_raw and got strange
behavior. I can't receive full file data it cut somewhere in the muddle. I use
the same device with same web files, I just compile lwip 1.4.1 or 2.0.3b. So
1.4.1 works fine, but 2.0.3b fails.
I use FatFs on SD card to store files and set LWIP_HTTPS_DYNAMIC_FILE_READ =
1
Please see in attached files the Wireshark logs. Where are the same file
transfer, 'good*' files captured on lwip 1.4.1, 'wrong*' files from 2.0.3b.
I observed that on 2.0.3b the server sends 'HTTP/1.0 200 OK' answer and a part
of file in one TCP send and looks like this caused browser to send ACK, then
FIN, ACK. And after that browser sends RST on following file chinks while lwip
continue send file chunks. Lwip 1.4.1 doesn't send '200 ok' answer right after
GET request, but just send file chunks and send '200 OK' only after file was
send.
So can anybody help me to fox this issue?
Lwip is a 192.168.0.141 host, the 192.168.0.112 is a Linux PC station with
Firefox browser.



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File Attachments:


-------------------------------------------------------
Date: Fri 28 Apr 2017 12:08:52 PM UTC  Name: good-short.txt  Size: 10kB   By:
gdi

<http://savannah.nongnu.org/bugs/download.php?file_id=40525>
-------------------------------------------------------
Date: Fri 28 Apr 2017 12:08:52 PM UTC  Name: good.txt  Size: 113kB   By: gdi

<http://savannah.nongnu.org/bugs/download.php?file_id=40526>
-------------------------------------------------------
Date: Fri 28 Apr 2017 12:08:52 PM UTC  Name: wrong-short.txt  Size: 13kB   By:
gdi

<http://savannah.nongnu.org/bugs/download.php?file_id=40527>
-------------------------------------------------------
Date: Fri 28 Apr 2017 12:08:52 PM UTC  Name: wrong.txt  Size: 168kB   By: gdi

<http://savannah.nongnu.org/bugs/download.php?file_id=40528>

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