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[lwip-devel] [bug #42633] Write many frames at high speed to a PC stops
[lwip-devel] [bug #42633] Write many frames at high speed to a PC stops communication random.
Fri, 27 Jun 2014 08:45:49 +0000
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Summary: Write many frames at high speed to a PC stops
Project: lwIP - A Lightweight TCP/IP stack
Submitted by: mensfort
Submitted on: Fri 27 Jun 2014 08:45:48 AM GMT
Severity: 3 - Normal
Item Group: Faulty Behaviour
Assigned to: None
Discussion Lock: Any
lwIP version: 1.4.1
I have an embedded device with LWIP that sends 400KByte text to a PC at high
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?
Date: Fri 27 Jun 2014 08:45:48 AM GMT Name: evidence.png Size: 144kB By:
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- [lwip-devel] [bug #42633] Write many frames at high speed to a PC stops communication random.,
Bart Houkes <=