The NWSTATE field reports both available access technology and the
actual access technology in-use when a PS connection is active, so
report the actual access tech when it's available.
For connection failures, get additional error detail. Currently,
the only error codes that are mapped are the 3GPP TS 24.008 codes
for "Unknown or missing access point name" and "Requested service
option not subscribed" (which is sometimes returned for an invalid
APN).
(random fixes and cleanups by dcbw)
Port the differences over to the common Icera code (there were only
two) and remove the duplicate code from the Samsung plugin. The
Icera NWSTATE regex had to be adjusted to capture "-1" in the first
element which wasn't handled before but which I've seen on the
Samsung Y3300 before the card has registered.
The GInterface structure for MMModemIcera isn't instance data, thus we
shouldn't be storing an instance pointer in it. Instead, make implemtors
store the intstance data in their private structure, and have them
implement an accessor for the Icera-private data. This makes everone
(especially GObject) happy. It's a bit of additional indirection, but
we still get to use the MM_MODEM_ICERA_GET_PRIVATE() and we still
get to cast the passed-in GInterface MMModemIcera into the various
GSM MMModem subclasses, which is all we ever wanted anyway.
Implement connect, disconnect, and IP4 config stuff.
Also fix handling of Icera private data. After creation we
need to use MM_MODEM_ICERA_GET_INTERFACE(m)->priv to get the
private data instead of just dereferencing the MMModemIcera,
for reasons that I don't know. If this isn't done, data
gets silently corrupted because writes to the private data
are going into a random location in the object. This a
side-effect of the slightly hack-ish way that MMModemIcera
is a GInterface with private data.
