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[lwip-devel] [bug #42633] Write many frames at high speed to a PC stops
From: |
Bart Houkes |
Subject: |
[lwip-devel] [bug #42633] Write many frames at high speed to a PC stops communication random. |
Date: |
Fri, 27 Jun 2014 08:45:49 +0000 |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0 |
URL:
<http://savannah.nongnu.org/bugs/?42633>
Summary: Write many frames at high speed to a PC stops
communication random.
Project: lwIP - A Lightweight TCP/IP stack
Submitted by: mensfort
Submitted on: Fri 27 Jun 2014 08:45:48 AM GMT
Category: TCP
Severity: 3 - Normal
Item Group: Faulty Behaviour
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Planned Release:
lwIP version: 1.4.1
_______________________________________________________
Details:
I have an embedded device with LWIP that sends 400KByte text to a PC at high
speed.
During monitoring on Wireshark I see following:
Usually, every block of data is acknowledged immediately after sending the
data. After some time, LWIP sends 3 frames to a PC and receives an acknowledge
for the first frame. So, 2 frames are not acknowledged yet. Then LWIP sends
more frames until TCP_WND is reached. Then, the first outstanding frame that
needs an acknowledge is resent several times... the PC does not react anymore,
although I think it should send an ACK.
This issue happens when I call the TCP-layer directly, but also when I use
netconn to send data.
I have tried this in Windows, Linux, Telnet and others... so it must be a
problem in LWIP. What can be wrong?
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Fri 27 Jun 2014 08:45:48 AM GMT Name: evidence.png Size: 144kB By:
mensfort
<http://savannah.nongnu.org/bugs/download.php?file_id=31626>
_______________________________________________________
Reply to this item at:
<http://savannah.nongnu.org/bugs/?42633>
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- [lwip-devel] [bug #42633] Write many frames at high speed to a PC stops communication random.,
Bart Houkes <=