cinterion: extend SGAUTH syntax

AT^SGAUTH syntax depends on the modem family:
  AT^SGAUTH=cid,type,user,pwd   for the IMT family
  AT^SGAUTH=cid,type,pwd,user   for the rest

plugins/cinterion/mm-broadband-bearer-cinterion.c

@@ -197,9 +197,13 @@ parse_auth_type (MMBearerAllowedAuth mm_auth)
     }
 }
 
-/* AT^SGAUTH=<cid>[, <auth_type>[, <passwd>, <user>]] */
+/* Cinterion authentication is done with the command AT^SGAUTH,
+   whose syntax depends on the modem family, as follow:
+   - AT^SGAUTH=<cid>[, <auth_type>[, <user>, <passwd>]] for the IMT family
+   - AT^SGAUTH=<cid>[, <auth_type>[, <passwd>, <user>]] for the rest */
 static gchar *
 build_auth_string (MMBroadbandBearerCinterion *self,
+                   MMCinterionModemFamily      modem_family,
                    MMBearerProperties         *config,
                    guint                       cid)
 {
@@ -241,6 +245,13 @@ build_auth_string (MMBroadbandBearerCinterion *self,
     quoted_user   = mm_port_serial_at_quote_string (user   ? user   : "");
     quoted_passwd = mm_port_serial_at_quote_string (passwd ? passwd : "");
 
+    if (modem_family == MM_CINTERION_MODEM_FAMILY_IMT)
+        return g_strdup_printf ("^SGAUTH=%u,%d,%s,%s",
+                                cid,
+                                encoded_auth,
+                                quoted_user,
+                                quoted_passwd);
+
     return g_strdup_printf ("^SGAUTH=%u,%d,%s,%s",
                             cid,
                             encoded_auth,
@@ -409,7 +420,11 @@ dial_3gpp_context_step (GTask *task)
     case DIAL_3GPP_CONTEXT_STEP_AUTH: {
         gchar *command;
 
-        command = build_auth_string (self, mm_base_bearer_peek_config (MM_BASE_BEARER (ctx->self)), ctx->cid);
+        command = build_auth_string (self,
+                                     mm_broadband_modem_cinterion_get_family (MM_BROADBAND_MODEM_CINTERION (self)),
+                                     mm_base_bearer_peek_config (MM_BASE_BEARER (ctx->self)),
+                                     ctx->cid);
+
         if (command) {
             mm_obj_dbg (self, "dial step %u/%u: authenticating...", ctx->step, DIAL_3GPP_CONTEXT_STEP_LAST);
             /* Send SGAUTH write, if User & Pass are provided.

plugins/cinterion/mm-broadband-modem-cinterion.c

@@ -105,6 +105,14 @@ struct _MMBroadbandModemCinterionPrivate {
     MMBaseModemAtCommandAlloc *cmds;
 };
 
+MMCinterionModemFamily
+mm_broadband_modem_cinterion_get_family (MMBroadbandModemCinterion * modem)
+{
+    g_assert_nonnull (modem);
+    return modem->priv->modem_family;
+}
+
+
 /*****************************************************************************/
 /* Enable unsolicited events (SMS indications) (Messaging interface) */
 

plugins/cinterion/mm-broadband-modem-cinterion.h

@@ -19,6 +19,7 @@
 #define MM_BROADBAND_MODEM_CINTERION_H
 
 #include "mm-broadband-modem.h"
+#include "mm-modem-helpers-cinterion.h"
 
 #define MM_TYPE_BROADBAND_MODEM_CINTERION            (mm_broadband_modem_cinterion_get_type ())
 #define MM_BROADBAND_MODEM_CINTERION(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), MM_TYPE_BROADBAND_MODEM_CINTERION, MMBroadbandModemCinterion))
@@ -48,4 +49,6 @@ MMBroadbandModemCinterion *mm_broadband_modem_cinterion_new (const gchar *device
                                                              guint16 vendor_id,
                                                              guint16 product_id);
 
+MMCinterionModemFamily mm_broadband_modem_cinterion_get_family (MMBroadbandModemCinterion * modem);
+
 #endif /* MM_BROADBAND_MODEM_CINTERION_H */