[GitHub] [incubator-nuttx] a-lunev opened a new pull request #5340: net/tcp/sendfile: notify the device driver of the availability of TX data on TCP retransmission

[GitBox <gi...@apache.org>]

a-lunev opened a new pull request #5340:
URL: https://github.com/apache/incubator-nuttx/pull/5340


   ## Summary
   
   Notify the device driver of the availability of TX data on TCP retransmission (as well as on sending normal TCP packets).
   
   ## Impact
   
   TCP sendfile
   
   ## Testing
   
   Activate emulating packet loss on Linux host:
   `$ sudo iptables -A INPUT -p tcp --dport 31337 -m statistic --mode random --probability 0.01 -j DROP`
   
   Build NuttX:
   ```
   $ ./tools/configure.sh -l sim:tcpblaster
   $ make menuconfig (enable CONFIG_NETUTILS_NETCAT_SENDFILE, enable/disable CONFIG_NET_TCP_WRITE_BUFFERS)
   $ make
   ```
   Enable TUN/TAP on Linux host:
   ```
   $ sudo setcap cap_net_admin+ep ./nuttx
   $ sudo ./tools/simhostroute.sh wlan0 on
   ```
   Run netcat server on Linux host:
   `$ netcat -l -p 31337`
   
   Run NuttX on Linux host:
   ```
   $ ./nuttx
   NuttShell (NSH) NuttX-10.2.0
   nsh> ifconfig eth0 10.0.1.2
   nsh> ifup eth0
   ifup eth0...OK
   ```
   Start Wireshark (or tcpdump) and capture appeared tap0 interface.
   
   Run in NuttX:
   ```
   nsh> dd if=/dev/zero of=/tmp/test.bin count=1000
   nsh> netcat LINUX_HOST_IP_ADDRESS 31337 /tmp/test.bin
   ```
   
   Observe packet loss -> duplicate ACKs -> Fast Retransmit in TCP dump.
   
   Shutdown NuttX:
   `nsh> poweroff`
   
   Disable TUN/TAP on Linux host:
   `$ sudo ./tools/simhostroute.sh wlan0 off`
   
   Deactivate emulating packet loss on Linux host:
   `$ sudo iptables -D INPUT -p tcp --dport 31337 -m statistic --mode random --probability 0.01 -j DROP`


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: commits-unsubscribe@nuttx.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org

[GitHub] [incubator-nuttx] xiaoxiang781216 merged pull request #5340: net/tcp/sendfile: notify the device driver of the availability of TX data on TCP retransmission

[GitBox <gi...@apache.org>]

xiaoxiang781216 merged pull request #5340:
URL: https://github.com/apache/incubator-nuttx/pull/5340


   


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: commits-unsubscribe@nuttx.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org