gsm_23_003: add GSM23003_MSISDN_{MIN,MAX}_DIGITS
Add the constant, so it can be used in create-subscriber-on-demand
related patches. ITU-T Rec. E.164 6.1 states that maximum international
number length should be 15. I did not find a source for a minimum
length, but I've added the constant and set it to 1 for consistency
(based on the existing osmo_msisdn_str_valid() function).
Related: OS#2542
Change-Id: Idc74f4d94ad44b9fc1b6d43178f5f33d551ebfb1
diff --git a/include/osmocom/gsm/protocol/gsm_23_003.h b/include/osmocom/gsm/protocol/gsm_23_003.h
index be1b157..3e5c3e5 100644
--- a/include/osmocom/gsm/protocol/gsm_23_003.h
+++ b/include/osmocom/gsm/protocol/gsm_23_003.h
@@ -20,6 +20,9 @@
#define GSM23003_MME_CODE_NUM_BYTES 1
#define GSM23003_MME_GROUP_NUM_BYTES 2
#define GSM23003_MTMSI_NUM_BYTES 4
+/* Chapter 3.2 */
+#define GSM23003_MSISDN_MAX_DIGITS 15 /* ITU-T Rec. E.164 6.1 */
+#define GSM23003_MSISDN_MIN_DIGITS 1
/* Chapter 6.2.1 */
#define GSM23003_IMEI_TAC_NUM_DIGITS 8
#define GSM23003_IMEI_SNR_NUM_DIGITS 6