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Today's Topics:
1. Skipping wpa_supplicant interfaces by mistake
(Blanquicet-Melendez Jose (MM))
----------------------------------------------------------------------
Message: 1
Date: Thu, 7 Jul 2016 12:13:08 +0000
From: "Blanquicet-Melendez Jose (MM)"
<[email protected]>
To: "[email protected]" <[email protected]>
Subject: Skipping wpa_supplicant interfaces by mistake
Message-ID: <[email protected]>
Content-Type: text/plain; charset="us-ascii"
Hi,
If the wpa_supplicant has been launched before ConnMan, when the Connman calls
the GetAll method on the fi.w1.wpa_supplicant1, the properties are returned as
an array where there is an entry named "Interfaces". This entry is an array
itself with only the object path of the current available interfaces. The
problem occurs when ConnMan goes across this array using the function
interface_added(), because this function tries also to extract the interface
properties next to object path which is wrong because properties are not
appended in this message reply. So, by doing dbus_message_iter_next(iter), we
are actually skipping one interface of the list and it will result in a future
error because the skipped interface(s) were not stored and ConnMan will not be
aware of them.
This issue is due to the function interface_added() is also used when signal
"fi.w1.wpa_supplicant1.InterfaceAdded" arrives, and in this message the
properties are actually appended. It could be solved by distinguishing the
caller of the function interface_added(). It means to know if function
interface_added() was called after a GetAll call or a InterfaceAdded signal in
order to avoid trying to extract properties if they are not actually appended
in the message.
I think it could be done by taking advantage from the unused user_data argument
of function interface_added(). Do you agree or is there something we are
missing?
Best regards,
Jose Blanquicet
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End of connman Digest, Vol 9, Issue 2
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