Hi Marcel,

I dont have problem with signature. For me, I just want device class. I have written following code.

        msg = dbus_message_new_method_call("org.bluez", "/org/bluez/hci0", INTERFACE,"GetInfo");
        reply = dbus_connection_send_with_reply_and_block (conn,msg, -1,&error);
        dbus_message_iter_init (reply, &iter);
        printf("\nSignature::%s",dbus_message_get_signature(reply));
        printf("\nIter signature::%s",dbus_message_iter_get_signature(&iter));
        dbus_message_iter_recurse (&iter, &dict_iter);
        printf("\ndict_Iter signature::%s",dbus_message_iter_get_signature(&dict_iter));
        dbus_message_iter_recurse (&dict_iter, &data_iter);
        printf("\ndata_Iter signature::%s",dbus_message_iter_get_signature(&data_iter));
        while (dbus_message_iter_has_next(&data_iter))
        {
            printf("\ndata type::%d",(dbus_message_iter_get_arg_type(&data_iter)));
            dbus_message_iter_next(&data_iter);
        }
following is output:
Signature::a{sv}
Iter signature::a{sv}
dict_Iter signature::{sv}
data_Iter signature::s
data type::115

I am expecting all values in the while loop. I want to iterate all adapter info. Please correct me where I am wrong.

Regards
Yogesh


From: Marcel Holtmann <marcel@holtmann.org>
Reply-To: BlueZ users <bluez-users@lists.sourceforge.net>
To: BlueZ users <bluez-users@lists.sourceforge.net>
Subject: Re: [Bluez-users] Regarding GetInfo
Date: Wed, 17 Oct 2007 16:25:56 +0200

Hi Yogesh,

 I want to get device class. But DBus API's are available for getting
 device Major class, Minor class and service class. But no API to get
 device class. To get Device class I have two options,

 1. Get device class from GetInfo. 
 2. Get Major class, Minor class and service class and from that
 construct device class.
 So I choose first way, But I am not able to get device class.
 
 To get information about adapter, I have written code like this. 

 
 msg = dbus_message_new_method_call("org.bluez", "/org/bluez/hci0",
 INTERFACE,"GetInfo");
         reply = dbus_connection_send_with_reply_and_block (conn,msg,
 -1,&error);

         dbus_message_iter_init (reply, &iter); 
         printf("\nSignature::%s",dbus_message_get_signature(reply));
         cout<<"\nIter
 signature::"<<dbus_message_iter_get_signature(&iter);

         dbus_message_iter_recurse (&iter, &dict_iter); 
         cout<<"\ndict_Iter
 signature::"<<dbus_message_iter_get_signature(&dict_iter);
         dbus_message_iter_recurse (&dict_iter, &data_iter);

         cout<<"\ndata_Iter
 signature::"<<dbus_message_iter_get_signature(&data_iter); 
         while (dbus_message_iter_has_next(&data_iter))
         {
            cout<<"\ndata

type::"<<(dbus_message_iter_get_arg_type(&data_iter));
             dbus_message_iter_next(&data_iter); 
         }
 
 But its not working. When I print signatures, it is printing like this

 Signature::a{sv}
 Iter signature::a{sv}
 dict_Iter signature::{sv}
 data_Iter signature::s
 data type::115
 
 And I found that, 
  a{sv} is a dictionary with 's'tring keys and 'v'ariants as values

 
 So does that mean GetInfo is returning only one key value pair?
 Or I am missing something?

we fixed the signature in the last release. That might explain an issue.
Other than that, I can't read C++ code. Use plain C or Python to make me

look at your code.

Regards

Marcel



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