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Development notes

Developing a connman client

Connman client uses DBUS for communicating with connman daemon. This makes developing on laptop a bit problematic, because connman is most probably not installed on your development machine.

However it is possible to expose DBUS interface on Openvario device (or, for that matter, any other networked device running connman daemon) to the network. That in turn will allow to make ovshell connect to it over the tcp and allow to debug the app.

In order to do this, add /etc/dbus-1/system.d/public-tcp.conf file on the device running connman:

<!DOCTYPE busconfig PUBLIC
 "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
 "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
    <listen>tcp:host=localhost,bind=*,port=55556,family=ipv4</listen>
    <listen>unix:tmpdir=/tmp</listen>
    <auth>EXTERNAL</auth>
    <auth>ANONYMOUS</auth>
    <allow_anonymous/>
    <apparmor mode="disabled" />
    <policy context="default">
        <allow user="*" />
        <allow own="*" />
        <allow send_type="*" />
        <allow receive_type="*" />
        <allow send_destination="*"/>
    </policy>
</busconfig>

Also, add this line to /lib/systemd/system/dbus.socket:

[Listen]
...
ListenStream=55556

After rebooting the connman machine, it verify connection by running d-feet app on the development machine. Connect to address like this:

tcp:host=<ip>,port=55556