exception when calling dbus method that returns dictionary<string, dictionary<string,object>>

[Kevron Rees]

I get this exception when trying to get a call that returns a Dictionary<string,Dictionary<string,object>>:

Unhandled Exception: System.IndexOutOfRangeException: Array index is out of range.
  at NDesk.DBus.MessageReader.MarshalUInt (System.Byte* dst) [0x00017] in /build/buildd/ndesk-dbus-0.6.0/src/MessageReader.cs:195
  at NDesk.DBus.MessageReader.ReadInt32 () [0x00000] in /build/buildd/ndesk-dbus-0.6.0/src/MessageReader.cs:213
  at NDesk.DBus.MessageReader.ReadValue (DType dtype) [0x000a0] in /build/buildd/ndesk-dbus-0.6.0/src/MessageReader.cs:95
  at NDesk.DBus.MessageReader.ReadValue (System.Type type) [0x0011d] in /build/buildd/ndesk-dbus-0.6.0/src/MessageReader.cs:68
  at NDesk.DBus.MessageReader.ReadStruct (System.Type type) [0x0002b] in /build/buildd/ndesk-dbus-0.6.0/src/MessageReader.cs:410
  at NDesk.DBus.MessageReader.ReadValue (System.Type type) [0x0010d] in /build/buildd/ndesk-dbus-0.6.0/src/MessageReader.cs:64
  at NDesk.DBus.MessageReader.ReadArray (System.Type elemType) [0x000b2] in /build/buildd/ndesk-dbus-0.6.0/src/MessageReader.cs:374
  at NDesk.DBus.MessageReader.ReadValue (System.Type type) [0x0001d] in /build/buildd/ndesk-dbus-0.6.0/src/MessageReader.cs:44
  at NDesk.DBus.MessageReader.ReadStruct (System.Type type) [0x0002b] in /build/buildd/ndesk-dbus-0.6.0/src/MessageReader.cs:410
  at NDesk.DBus.MessageReader.ReadValue (System.Type type) [0x0010d] in /build/buildd/ndesk-dbus-0.6.0/src/MessageReader.cs:64
  at NDesk.DBus.MessageHelper.GetDynamicValues (NDesk.DBus.Message msg, System.Type[] types) [0x00086] in /build/buildd/ndesk-dbus-0.6.0/src/Mapper.cs:289
  at NDesk.DBus.BusObject.SendMethodCall (System.String iface, System.String member, System.String inSigStr, NDesk.DBus.MessageWriter writer, System.Type retType, System.Exception& exception) [0x000b5] in /build/buildd/ndesk-dbus-0.6.0/src/BusObject.cs:149
  at INetworkManagerSettingsConnectionProxy.GetSettings () [0x00000]
  at testNMDbus.MainClass.Main (System.String[] args) [0x00010] in /home/kev/Projects/VTel/GPS/GPSLocationAssistant/testNMDbus/Main.cs:15

The dbus method is from org.freedesktop.NetworkManagerSettings.Connection. I generated the c# interface from DBus-explorer.

[Kevron Rees (tripzero)]

Example code to reproduce the bug:

using System;
using System.Collections.Generic;
using NDesk.DBus;

namespace testNMDbus
{
 public class NetworkManagerSettings
 {
  private INetworkManagerSettings nms;
  private Connection DBusConnection;
  public NetworkManagerSettings()
  {
   DBusConnection = Bus.System;
   nms = DBusConnection.GetObject<INetworkManagerSettings>("org.freedesktop.NetworkManagerUserSettings", new ObjectPath("/org/freedesktop/NetworkManagerSettings"));
  }

  public ObjectPath[] ListConnections()
  {
   return nms.ListConnections();
  }
 }

 [Interface("org.freedesktop.NetworkManagerSettings")]
 public interface INetworkManagerSettings
 {
     ObjectPath[] ListConnections();
 }

 public delegate void UpdatedSettingsHandler(Dictionary<string, Dictionary<string, object>> properties);

 public class NetworkManagerSettingsConnection
 {
  private Connection DBusConnection;
  public INetworkManagerSettingsConnection nmsc;
  public NetworkManagerSettingsConnection(ObjectPath connectionPath)
  {
   DBusConnection = Bus.System;
   nmsc = DBusConnection.GetObject<INetworkManagerSettingsConnection>("org.freedesktop.NetworkManagerUserSettings", connectionPath);
  }
 }

 [Interface("org.freedesktop.NetworkManagerSettings.Connection")]
 public interface INetworkManagerSettingsConnection
 {
     Dictionary<string, Dictionary<string, object>> GetSettings();
     void Delete();
     void Update(Dictionary<string, Dictionary<string, object>> properties);
     event EventHandler Removed;
     event UpdatedSettingsHandler Updated;

 }

 class MainClass
 {
  public static void Main(string[] args)
  {
   NetworkManagerSettingsConnection connection = new NetworkManagerSettingsConnection(new ObjectPath("/org/freedesktop/NetworkManagerSettings/10"));

   Dictionary<string,Dictionary<string,object>> settings = connection.nmsc.GetSettings();

   foreach(string key in settings.Keys)
   {
    Console.WriteLine(key+":");
    foreach(string setting in settings[key].Keys)
    {
     object value = settings[key][setting];
     Console.WriteLine("\t"+setting+" = "+value.ToString());
    }
   }
  }
 }
}

[Kevron Rees (tripzero)]

This appears to be fixed in the git version.