Hello,

 

I can not get QUdpSocket working to receive broadcast messages with Qt5 from ptxdist (non GUI build).

I have attached a minimal code example. Such code was working fine when building against Qt 4.8.7.

I have tested the code on Windows with Qt 5.5.1 and under Debian Linux with Qt 5.3.2.

 

I also tried to build different versions of Qt with ptxdist: 5.4.1 and 5.5.1 (I adapted the patches accordingly).

 

When the test programm runs I see that the receive queue fills in netstat -a:

Proto Recv-Q Send-Q Local Address           Foreign Address         State
udp     1024      0 (null):5025             (null):*

I think that the bind works, but the packets are not delivered with the Qt signal.

I tried to receive broadcast messages using plain C code (bind(), recvfrom(), etc.) which works fine.

 

Therefore I think it is a Qt problem. But I tested three different versions (5.4.2 from ptxdist and 5.4.1 + 5.5.1), that I can not believe it really.

Does anyone successfully used QUdpSocket from a ptxdist Qt 5 build?

 

 

My envirnoment:

- OSELAS.Toolchain-2014.12.1 (arm-cortexa8-linux-gnueabihf)

- ptxdist-2015.10.0

- Mainline Kernel 3.12 with PREEMPT_RT (with minimal patches for the SoC)

- Freescale i.MX537 (Ka-Ro TX53 module)