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Re: [Bluez-users] [Fwd: Re: Regarding GetInfo]

Bluez-users Yogesh Jagtap 1 participant 1 message Oct 18, 2007 1 message not in the archive Bluetooth drivers

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Yogesh Jagtap

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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 <[email protected]<Marcel%20Holtmann%20%[email protected]%3e>

Quoted 64 lines
Quoted 1 line

*Reply-To*: BlueZ users <[email protected]<BlueZ%20users%20%[email protected]%3e>

Quoted 1 line

*To*: BlueZ users <[email protected]<BlueZ%20users%20%[email protected]%3e>

Quoted 1 line

*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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