broadband-modem-mbim: log hex value of IP type if unknown

The L850 seems to report 0xFFFFFFFF as MbimContextIpType value, which
is not a correct value.

Instead of printing "(none)" (the default used by glib when trying to
print a NULL pointer as a string), make it so that we end up printing
the actual numeric value in hex.

   <dbg> [modem0] 'home' settings found at configuration index 0
   <dbg> [modem0] 'non-partner' settings found at configuration index 1
   <dbg> [modem0] 'partner' settings not found
   <dbg> [modem0] updates in the home LTE attach configuration settings:
   <dbg> [modem0]   ip type: 'unknown (0xffffffff)' -> ''ipv4v6'
   <dbg> [modem0] updates in the partner LTE attach configuration settings:
   <dbg> [modem0]   none (skipped)
   <dbg> [modem0] updates in the non-partner LTE attach configuration settings:
   <dbg> [modem0]   none

1 files changed, 24 insertions, 0 deletions

diff --git a/src/mm-modem-helpers-mbim.c b/src/mm-modem-helpers-mbim.c
index b96f6b50..49d38531 100644
--- a/src/mm-modem-helpers-mbim.c
+++ b/src/mm-modem-helpers-mbim.c
@@ -457,6 +457,18 @@ mm_bearer_allowed_auth_to_mbim_auth_protocol (MMBearerAllowedAuth   bearer_auth,
     return MBIM_AUTH_PROTOCOL_NONE;
 }
 
+gchar *
+mm_mbim_auth_protocol_get_printable (MbimAuthProtocol auth_protocol)
+{
+    const gchar *str;
+
+    str = mbim_auth_protocol_get_string (auth_protocol);
+    if (str)
+        return g_strdup (str);
+
+    return g_strdup_printf ("unknown (0x%x)", auth_protocol);
+}
+
 /*****************************************************************************/
 
 MMBearerApnType
@@ -617,6 +629,18 @@ mm_bearer_ip_family_to_mbim_context_ip_type (MMBearerIpFamily   ip_family,
     return MBIM_CONTEXT_IP_TYPE_DEFAULT;
 }
 
+gchar *
+mm_mbim_context_ip_type_get_printable (MbimContextIpType ip_type)
+{
+    const gchar *str;
+
+    str = mbim_context_ip_type_get_string (ip_type);
+    if (str)
+        return g_strdup (str);
+
+    return g_strdup_printf ("unknown (0x%x)", ip_type);
+}
+
 /*****************************************************************************/
 
 gboolean