[dbus-cplusplus-devel] dynamic object ID and proxy objects (new to dbus-c++ question)

[Christopher P. <cpi...@gm...>]

Hi,

I've written a number of apps using the low level dbus API but wanted
to try dbus-c++ to do a small project.

I want to talk to wpa_supplicant to tell it to scan for a certain
SSID.  You accomplish this in several steps:

First, you ask wpa_supplicant for an object path to an interface.
Using the command line tools:
  dbus-send --system --print-reply --type=method_call \
     --dest=fi.epitest.hostap.WPASupplicant \
     /fi/epitest/hostap/WPASupplicant \
     fi.epitest.hostap.WPASupplicant.getInterface \
     string:"wlan0"

It will return something like:
   object path "/fi/epitest/hostap/WPASupplicant/Interfaces/0


Now that you have that object path, you can call the method that tells
it to begin scanning:

  dbus-send --system --print-reply --type=method_call \
     --dest=fi.epitest.hostap.WPASupplicant \
     /fi/epitest/hostap/WPASupplicant/Interfaces/0 \     # Note:
using object ID returned by above
     fi.epitest.hostap.WPASupplicant.Interface.scan

It returns 1 to indicate success.


Then you wait a while, and request the results with something like:

  dbus-send --system --print-reply --type=method_call \
     --dest=fi.epitest.hostap.WPASupplicant \
     /fi/epitest/hostap/WPASupplicant/Interfaces/0 \
     fi.epitest.hostap.WPASupplicant.Interface.scan



This returns an object consisting of a dictionary and a bunch of data.
 You can see described with an example:
http://old.nabble.com/0.7-not-working-with-linux-2.6.24-td15422455.html


So here's my question.  I made an XML file to try to describe all of
this in a way that dbusxx-xml2cpp would understand, and I got stuck
almost immediately because the nature of the Interface object is
dynamic.  In other words, I can't say:
  <node name="/fi/epitest/hostap/WPASupplicant/Interfaces/0"> ... </node>

because it might not be interface 0 on another system, it might be
interface 1, 2, or 100.

What's the right way to proceed here?  Do I need to not use the proxy
object model / code generator all (in which case, is there any point
to me using dbus-c++ for this project?)

--Chris