introduce GSM_MCC_MNC_INVALID
In some cases, we want to mark an unset MCC-MNC. Define uint16-max for this
purpose.
osmo-bsc code is already doing so with a -1 and using int data types, which
will become inconvenient with the new API that handles MCC and MNC as uint16_t.
Change-Id: Ieee7add0bd6d94cf84743a49794bbcd38561b72f
diff --git a/include/osmocom/gsm/gsm48.h b/include/osmocom/gsm/gsm48.h
index 5f14435..7c66a20 100644
--- a/include/osmocom/gsm/gsm48.h
+++ b/include/osmocom/gsm/gsm48.h
@@ -12,6 +12,10 @@
/* reserved according to GSM 03.03 § 2.4 */
#define GSM_RESERVED_TMSI 0xFFFFFFFF
+/* Valid MCC and MNC range from 0 to 999.
+ * To mark an invalid / unset MNC, this value shall be used. */
+#define GSM_MCC_MNC_INVALID 0xFFFF
+
/* A parsed GPRS routing area */
struct gprs_ra_id {
uint16_t mcc;