sierra: use DHCP for the USB 305 (AT&T Lightning)

This is the port to git master of the following commit:

commit 44f70121f75d59dbf31a4a9a1a4e87293e509e7a
Author: Dan Williams <dcbw@redhat.com>
Date:   Tue Aug 28 20:18:40 2012 -0500

    sierra: use DHCP for the USB 305 (AT&T Lightning)

    For some reason, my AT&T Lightning just doesn't work with static
    IP (AT%IPDPADDR) any more.  No traffic passes even though everything
    is set up the way it was before.  No idea what happened.  Using
    latest firmware 2.0.0.11.

    But what's interesting is on Windows the generic Sierra Watcher
    app uses DHCP.  But on Linux, when using AT%IPDPACT, DHCP doesn't
    work.  That's odd.  But it turns out the modem supports the
    "standard" Sierra proprietary AT!SCACT commands, and that
    *does* make DHCP work.  Crazy no?  So since the Windows app
    uses DHCP, it's likely that the non-DHCP case (AT%IPDPACT/AT%IPDPADDR)
    either isn't well tested or isn't well supported.  With that
    in mind, let's just use DHCP for this device in Linux too.

1 files changed, 59 insertions, 0 deletions

diff --git a/plugins/sierra/mm-broadband-modem-sierra-icera.c b/plugins/sierra/mm-broadband-modem-sierra-icera.c
index c7d99045..42b11f5d 100644
--- a/plugins/sierra/mm-broadband-modem-sierra-icera.c
+++ b/plugins/sierra/mm-broadband-modem-sierra-icera.c
@@ -29,6 +29,7 @@
 #include "mm-modem-helpers.h"
 #include "mm-log.h"
 #include "mm-common-sierra.h"
+#include "mm-broadband-bearer-sierra.h"
 
 static void iface_modem_init (MMIfaceModem *iface);
 
@@ -36,6 +37,62 @@ G_DEFINE_TYPE_EXTENDED (MMBroadbandModemSierraIcera, mm_broadband_modem_sierra_i
                             G_IMPLEMENT_INTERFACE (MM_TYPE_IFACE_MODEM, iface_modem_init))
 
 /*****************************************************************************/
+/* Create Bearer (Modem interface) */
+
+static MMBearer *
+modem_create_bearer_finish (MMIfaceModem *self,
+                            GAsyncResult *res,
+                            GError **error)
+{
+    MMBearer *bearer;
+
+    bearer = g_simple_async_result_get_op_res_gpointer (G_SIMPLE_ASYNC_RESULT (res));
+    mm_dbg ("New Sierra bearer created at DBus path '%s'", mm_bearer_get_path (bearer));
+
+    return g_object_ref (bearer);
+}
+
+static void
+broadband_bearer_sierra_new_ready (GObject *source,
+                                   GAsyncResult *res,
+                                   GSimpleAsyncResult *simple)
+{
+    MMBearer *bearer = NULL;
+    GError *error = NULL;
+
+    bearer = mm_broadband_bearer_sierra_new_finish (res, &error);
+    if (!bearer)
+        g_simple_async_result_take_error (simple, error);
+    else
+        g_simple_async_result_set_op_res_gpointer (simple,
+                                                   bearer,
+                                                   (GDestroyNotify)g_object_unref);
+    g_simple_async_result_complete (simple);
+    g_object_unref (simple);
+}
+
+static void
+modem_create_bearer (MMIfaceModem *self,
+                     MMBearerProperties *properties,
+                     GAsyncReadyCallback callback,
+                     gpointer user_data)
+{
+    GSimpleAsyncResult *result;
+
+    result = g_simple_async_result_new (G_OBJECT (self),
+                                        callback,
+                                        user_data,
+                                        modem_create_bearer);
+
+    mm_dbg ("Creating Sierra bearer...");
+    mm_broadband_bearer_sierra_new (MM_BROADBAND_MODEM_SIERRA (self),
+                                    properties,
+                                    NULL, /* cancellable */
+                                    (GAsyncReadyCallback)broadband_bearer_sierra_new_ready,
+                                    result);
+}
+
+/*****************************************************************************/
 /* Setup ports (Broadband modem class) */
 
 static void
@@ -77,6 +134,8 @@ iface_modem_init (MMIfaceModem *iface)
     iface->modem_power_up_finish = mm_common_sierra_modem_power_up_finish;
     iface->create_sim = mm_common_sierra_create_sim;
     iface->create_sim_finish = mm_common_sierra_create_sim_finish;
+    iface->create_bearer = modem_create_bearer;
+    iface->create_bearer_finish = modem_create_bearer_finish;
 }
 
 static void