Hi Richard,
> attached, and connection managers (at least connman) start > to hammer us to connect a context, eventhough it happens > automatically in LTE.What happens automatically? Yes, it is true that you need a default context to attach to LTE. So activating a context is basically a part of the LTE attach procedure. But that default context does not need to be an internet context (e.g. Verizon uses (or used to) use an ims context for this). So ConnMan still might need to activate an Internet context even if we're on LTE. To do that wouldn't we need to be able to flag attached even without registered context for LTE? Or will the modem not attach to 4G until the context is configured? I can not test that case with my modems.
It sort of depends on the configuration. But basically we will not get on LTE without a default bearer. The default bearer configuration can come from the modem itself, or actually from the network. That default bearer is essentially an active context. This is why gprs.c goes to the trouble of matching it against existing contexts, but if it isn't found, then adds a new one (which is supposed to be transient/temporary).
Typically, on a well-configured system, you'll have the default bearer setup via LongTermEvolution.DefaultAccessPointName and also provisioned in the provisioning database. But as I mentioned earlier, the default context doesn't have to be an internet one.
Regards, -Denis
I'm also not sure that the heuristic of 0 active contexts means not attached is a good one. Shouldn't you be using +CREG or +CEREG status for this? As you say that is probably more correct :)First I wanted to get things running with the current solution which uses an activecontext as condition. > --- > src/gprs.c | 9 +++++---- > 1 file changed, 5 insertions(+), 4 deletions(-) > > diff --git a/src/gprs.c b/src/gprs.c > index 94d13f82..cb31e2d2 100644 > --- a/src/gprs.c > +++ b/src/gprs.c > @@ -2738,11 +2738,12 @@ void ofono_gprs_context_deactivated(struct ofono_gprs_context *gc, > * If "Attached" property was about to be signalled as TRUE but there > * were still active contexts, try again to signal "Attached" property > * to registered applications after active contexts have been released. > + * > + * ... or in the case of LTE where the attached state were a registered > + * context is a condition for being attached > */ > - if (gc->gprs->flags & GPRS_FLAG_ATTACHED_UPDATE) { > - gc->gprs->flags &= ~GPRS_FLAG_ATTACHED_UPDATE; > - gprs_attached_update(gc->gprs); > - } > + gc->gprs->flags &= ~GPRS_FLAG_ATTACHED_UPDATE; > + gprs_attached_update(gc->gprs); > } > > int ofono_gprs_context_driver_register( > Regards, -Denis
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