Re: Exposing bssid information

[Denis Kenzior <denkenz@gmail.com>]

Hi James,

On 2/19/25 2:42 PM, James Hanley wrote:
> Thanks - this is really helpful for direction. I was going to
> initially brute force load all the attributes into a new interface,
> but it seems the preferred course from your suggestion is to gather
> the ESSID information and query each node individually for the BSSID
> information and populate that method with the associated details?
> 
> One point that I'm stumbling on in testing the pristine codebase is
> accessing the ExtendedServiceSet property:
> test-wifi/test# dbus-send --system --type=method_call --print-reply
> --dest=net.connman.iwd /net/connman/iwd/0/2/53-elided-53_psk
> net.connman.iwd.Network.ExtendedServiceSet
> Error org.freedesktop.DBus.Error.NotFound: No matching method found
> 

You are trying to invoke a method.  ExtendedServiceSet is a property.

> When I query for the available interfaces and methods, I am able to see:
> test-wifi/test# dbus-send --system --type=method_call --print-reply
> --dest=net.connman.iwd /net/connman/iwd/0/2/53-elided-53_psk
> org.freedesktop.DBus.Introspectable.Introspect
> method return time=1739996534.609643 sender=:1.1090 ->
> destination=:1.1474 serial=2631 reply_serial=2
>     string "<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object
> Introspection 1.0//EN"
> "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
> <node>
>          <interface name="org.freedesktop.DBus.Introspectable">
>                  <method name="Introspect">
>                          <arg name="xml" type="s" direction="out"/>
>                  </method>
>          </interface>
>          <interface name="net.connman.iwd.Network">
>                  <method name="Connect">
>                  </method>
>                  <property name="Name" type="s" access="read"/>
>                  <property name="Connected" type="b" access="read"/>
>                  <property name="Device" type="o" access="read"/>
>                  <property name="Type" type="s" access="read"/>
>                  <property name="KnownNetwork" type="o" access="read"/>
>                  <property name="ExtendedServiceSet" type="ao" access="read"/>

^^^

>          </interface>
>          <interface name="org.freedesktop.DBus.Properties">
>                  <method name="Get">
>                          <arg name="interface_name" type="s" direction="in"/>
>                          <arg name="property_name" type="s" direction="in"/>
>                          <arg name="value" type="v" direction="out"/>

Use this or the GetAll method to query properties.

>                  </method>
>                  <method name="Set">
>                          <arg name="interface_name" type="s" direction="in"/>
>                          <arg name="property_name" type="s" direction="in"/>
>                          <arg name="value" type="v" direction="in"/>
>                  </method>
>                  <method name="GetAll">
>                          <arg name="interface_name" type="s" direction="in"/>
>                          <arg name="props" type="a{sv}" direction="out"/>
>                  </method>
>                  <signal name="PropertiesChanged">
>                          <arg name="interface_name" type="s"/>
>                          <arg name="changed_properties" type="a{sv}"/>
>                          <arg name="invalidated_properties" type="as"/>
>                  </signal>
>          </interface>
>          <node name="d8-elided-95"/>
>          <node name="d8-elided-55"/>
>          <node name="d8-elided-15"/>
>          <node name="d8-elided-95"/>
>          <node name="d8-elided-55"/>
>          <node name="d8-elided-95"/>
> </node>
> "
> 
> Is there something I'm missing in attempting to access this detail
> from dbus-send?  Ultimately this is only for testing, but I do plan on
> using the DBusConnection c-api and getting it right with dbus-send
> will help me in defining the code flow.

Try qdbus-viewer or d-feet.  Nicer to use than dbus-send.

> 
> -Jim

Regards,
-Denis