I have an old legato app running fine with legato 19.2 and yocto 3.18. Now with new generations of wp7607-1 modules I have to use legato 21.05 and linux 4.14. I was able to compile and install yocto with additional progs (openvpn) as I did with last version of legato dist-source (version 02.37.10.0…

So is this related to particule port number as you said that you can create another tcp server port? Did you capture wireshark log for investigation? Does this help? [image] TCP communication between apps Legato Application Framework Do you mean you don’t want to use IP…

Hello, No it is not related to a specific port number. It seems to be a problem with my new compiled app with current legato and / or linux 4.14. I thought it could be a sandbox-problem but the app is currently not sandboxed.

Did you capture wireshark log for investigation? Does this application help? [image] Networking: TCP server Operation not permitted (errno -1) You can use my TCP echo server application which uses read() instead of recv(). Procedure: compile and download attached app…

Hello, I will add tcpdump to my system and try to capture packets.

You can also capture wireshark log on PC side Btw, you can also try this app [image] Networking: TCP server Operation not permitted (errno -1) You can use my TCP echo server application which uses read() instead of recv(). Procedure: compile and download attached ap…

With my older Wp7607-1 everything works fine. Also a server created with socat is responding. The tcp-server of my app does not even recognize a connection!

If the app above works, then you can port the app to your application

I started my apps tcpserver on port 9302 (and it is running): root 2417 0.0 0.7 3196 1216 pts/0 S 12:37 0:00 ./tcpserver -p 9302 -t 900 start I connected to a PC and used the local ecm0-interface for testing. I started socat with: socat -v -d -d TCP-LISTEN:9302,fork TCP:localhos…

I compiled and installed your app fwdownloader. It runs as expected. I can connect local with nc and see the echo of my messages.

Now i compared your server with mine: I used socket(AF_INET, SOCK_STREAM, IPPROTO_TCP) you use socket(AF_INET, SOCK_STREAM, 0) I used if (listen(fd,0) < 0) … you use if (listen(fd,1) < 0) … I changed the 2 lines. Additionally I had to remove the build-Directory to recompile all code. After…

WP7607-1 with Legato 21.05, tcp-server not working as expected

jyijyi January 22, 2025, 11:26am 6

You can also capture wireshark log on PC side

Btw, you can also try this app

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WP7607-1 with Legato 21.05, tcp-server not working as expected

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