dbus getting Originator ID in C

William Manley william.manley at youview.com
Fri Feb 15 09:21:37 PST 2013

On 11/02/13 20:46, Thiago Macieira wrote:
> On segunda-feira, 11 de fevereiro de 2013 20.29.04, Richard wrote:
>> Hi All,
>> Pardon the intrusion but I am on the quest for some information as I
>> am stuck. I tried searching but I am at a loss what to search for, but
>> here goes.
>> I am implementing a dbus based client and server and would like to
>> know how to get the common name of sender of the message.
> You can only get the unique connection name.
>> Client                          Server
>> dvb.ingres.client --->     dvb.settings.server
>> I can receive all the messages at the server but would like to know
>> WHO sent the message.   _get_sender() returns a chaging number,
>> get_server_id returns a large number that I dont know where it comes
>> from.
>> Is there a way to get the human readable name of the message
>> originator? (who the client is)
> No, you can only get the unique connection name, which is probably the
> "changing number" you mention.
> You can ask the bus for the unique connection name of the sender you expect it
> to be and then compare if they are the same. Use the GetNameOwner call.

This is slightly racy as the name owner may have changed by the time
DBus receives the GetNameOwner call.  The way we have implemented such a
mapping is by keeping a cache of the owned names by listening for
NameOwnerChanged events.  You can then find out who owned the name when
the message was actually sent.
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