api,modem-3gpp: new 'InitialEpsBearer' property

This property contains the DBus path of a Bearer object of type
MM_BEARER_TYPE_DEFAULT_ATTACH, which is automatically exposed by the
modem when registered in the LTE network.

Unlike standard bearer objects created by the user, this bearer won't
allow any connection/disconnection request, as its status is bound to
the LTE registration exclusively.

The bearer settings exposed by the object include the APN details that
have been used during the initial packet network attach, which may be
defined by modem settings (e.g. if previously configured in the
firmware which APN to use for the given SIM card operator) or by the
network itself (e.g. if none configured, or if a network override is
required as when roaming).

The bearer object will be created as soon as the LTE attach status
details are known, and only while the modem is enabled. The
implementation allows modems to update the LTE attach status details
during runtime, so the bearer object with the settings may be
recreated during runtime as well.

1 files changed, 23 insertions, 5 deletions

diff --git a/src/mm-base-bearer.c b/src/mm-base-bearer.c
index b2e07e19..6b7e1e5d 100644
--- a/src/mm-base-bearer.c
+++ b/src/mm-base-bearer.c
@@ -764,8 +764,18 @@ mm_base_bearer_connect (MMBaseBearer *self,
 {
     GTask *task;
 
-    g_assert (MM_BASE_BEARER_GET_CLASS (self)->connect != NULL);
-    g_assert (MM_BASE_BEARER_GET_CLASS (self)->connect_finish != NULL);
+    if (!MM_BASE_BEARER_GET_CLASS (self)->connect) {
+        g_assert (!MM_BASE_BEARER_GET_CLASS (self)->connect_finish);
+        g_task_report_new_error (
+            self,
+            callback,
+            user_data,
+            mm_base_bearer_connect,
+            MM_CORE_ERROR,
+            MM_CORE_ERROR_FAILED,
+            "Bearer doesn't allow explicit connection requests");
+        return;
+    }
 
     /* If already connecting, return error, don't allow a second request. */
     if (self->priv->status == MM_BEARER_STATUS_CONNECTING) {
@@ -975,11 +985,19 @@ mm_base_bearer_disconnect (MMBaseBearer *self,
 {
     GTask *task;
 
-    g_assert (MM_BASE_BEARER_GET_CLASS (self)->disconnect != NULL);
-    g_assert (MM_BASE_BEARER_GET_CLASS (self)->disconnect_finish != NULL);
-
     task = g_task_new (self, NULL, callback, user_data);
 
+    if (!MM_BASE_BEARER_GET_CLASS (self)->disconnect) {
+        g_assert (!MM_BASE_BEARER_GET_CLASS (self)->disconnect_finish);
+        g_task_return_new_error (
+            task,
+            MM_CORE_ERROR,
+            MM_CORE_ERROR_FAILED,
+            "Bearer doesn't allow explicit disconnection requests");
+        g_object_unref (task);
+        return;
+    }
+
     /* If already disconnected, done */
     if (self->priv->status == MM_BEARER_STATUS_DISCONNECTED) {
         g_task_return_boolean (task, TRUE);