Implement wating for MMI data

comm.h

@@ -47,6 +47,7 @@
 #define RET_MMI_STATUS 3
 #define RET_MMI_SLOT_STATUS 4
 #define RET_MMI_RECV 5
+#define RET_MMI_WAIT 6
 #define RET_HUH 255
 
 struct ret_frontend_status

dvblast_mmi.sh

@@ -124,6 +124,10 @@ while :; do
 		echo "CAUTION: the password won't be bulleted, be alone"
 		echo -n "Your choice (empty for extra choices) ? "
 		;;
+	252)
+		sleep 1
+		continue
+		;;
 	0)
 		echo -n "Your choice: (B)ack, (C)lose or (R)etry ? "
 		;;

dvblastctl.c

@@ -252,6 +252,10 @@ int main( int i_argc, char **ppsz_argv )
         exit(0);
         break;
 
+    case RET_MMI_WAIT:
+        exit(252);
+        break;
+
     case RET_ERR:
         msg_Err( NULL, "request failed" );
         exit(255);

en50221.c

@@ -2374,7 +2374,7 @@ uint8_t en50221_GetMMIObject( uint8_t *p_buffer, ssize_t i_size,
     i_slot = *p_buffer;
 
     if ( pb_slot_mmi_expected[i_slot] == true )
-        return RET_ERR; /* should not happen */
+        return RET_MMI_WAIT; /* data not yet available */
 
     p_ret->object.i_object_type = EN50221_MMI_NONE;
     *pi_size = sizeof(struct ret_mmi_recv);