import gsm48_decode_lai() function from osmocom-bb/mobile sysinfo.c
diff --git a/include/osmocom/gsm/gsm48.h b/include/osmocom/gsm/gsm48.h
index 16a625a..1e7498a 100644
--- a/include/osmocom/gsm/gsm48.h
+++ b/include/osmocom/gsm/gsm48.h
@@ -20,6 +20,8 @@
const char *gsm48_cc_msg_name(uint8_t msgtype);
const char *rr_cause_name(uint8_t cause);
+int gsm48_decode_lai(struct gsm48_loc_area_id *lai, uint16_t *mcc,
+ uint16_t *mnc, uint16_t *lac);
void gsm48_generate_lai(struct gsm48_loc_area_id *lai48, uint16_t mcc,
uint16_t mnc, uint16_t lac);
int gsm48_generate_mid_from_tmsi(uint8_t *buf, uint32_t tmsi);
diff --git a/src/gsm/gsm48.c b/src/gsm/gsm48.c
index 379ed65..61e5d2c 100644
--- a/src/gsm/gsm48.c
+++ b/src/gsm/gsm48.c
@@ -285,6 +285,20 @@
lai48->lac = htons(lac);
}
+int gsm48_decode_lai(struct gsm48_loc_area_id *lai, uint16_t *mcc,
+ uint16_t *mnc, uint16_t *lac)
+{
+ *mcc = ((lai->digits[0] & 0x0f) << 8)
+ | (lai->digits[0] & 0xf0)
+ | (lai->digits[1] & 0x0f);
+ *mnc = ((lai->digits[2] & 0x0f) << 8)
+ | (lai->digits[2] & 0xf0)
+ | ((lai->digits[1] & 0xf0) >> 4);
+ *lac = ntohs(lai->lac);
+
+ return 0;
+}
+
int gsm48_generate_mid_from_tmsi(uint8_t *buf, uint32_t tmsi)
{
uint32_t *tptr = (uint32_t *) &buf[3];