mncc: Add IMSI to gsm_mncc
This allows us to do subscriber lookups based on IMSI and e.g. establish
MT calls to subscribers with no assigned extension.
diff --git a/openbsc/include/openbsc/mncc.h b/openbsc/include/openbsc/mncc.h
index c04a81f..6aa1917 100644
--- a/openbsc/include/openbsc/mncc.h
+++ b/openbsc/include/openbsc/mncc.h
@@ -193,6 +193,7 @@
int more;
int notify; /* 0..127 */
int emergency;
+ char imsi[16];
unsigned char lchan_mode;
};
diff --git a/openbsc/src/gsm_04_08.c b/openbsc/src/gsm_04_08.c
index 8e5bfe8..117fb12 100644
--- a/openbsc/src/gsm_04_08.c
+++ b/openbsc/src/gsm_04_08.c
@@ -2198,6 +2198,8 @@
setup.fields |= MNCC_F_CALLING;
strncpy(setup.calling.number, trans->subscr->extension,
sizeof(setup.calling.number)-1);
+ strncpy(setup.imsi, trans->subscr->imsi,
+ sizeof(setup.imsi)-1);
}
/* bearer capability */
if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) {
@@ -2536,6 +2538,8 @@
connect.fields |= MNCC_F_CONNECTED;
strncpy(connect.connected.number, trans->subscr->extension,
sizeof(connect.connected.number)-1);
+ strncpy(connect.imsi, trans->subscr->imsi,
+ sizeof(connect.imsi)-1);
}
/* facility */
if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) {
@@ -3367,7 +3371,8 @@
/* Callref unknown */
if (!trans) {
- if (msg_type != MNCC_SETUP_REQ || !data->called.number[0]) {
+ if (msg_type != MNCC_SETUP_REQ ||
+ (!data->called.number[0] && !data->imsi[0])) {
DEBUGP(DCC, "(bts - trx - ts - ti -- sub %s) "
"Received '%s' from MNCC with "
"unknown callref %d\n", data->called.number,
@@ -3377,8 +3382,20 @@
GSM48_CAUSE_LOC_PRN_S_LU,
GSM48_CC_CAUSE_INVAL_TRANS_ID);
}
+ if (!data->called.number[0] && !data->imsi[0]) {
+ DEBUGP(DCC, "(bts - trx - ts - ti) "
+ "Received '%s' from MNCC with "
+ "no number or IMSI\n", get_mncc_name(msg_type));
+ /* Invalid number */
+ return mncc_release_ind(net, NULL, data->callref,
+ GSM48_CAUSE_LOC_PRN_S_LU,
+ GSM48_CC_CAUSE_INV_NR_FORMAT);
+ }
/* New transaction due to setup, find subscriber */
- subscr = subscr_get_by_extension(data->called.number);
+ if (data->called.number[0])
+ subscr = subscr_get_by_extension(data->called.number);
+ else
+ subscr = subscr_get_by_imsi(data->imsi);
/* If subscriber is not found */
if (!subscr) {
DEBUGP(DCC, "(bts - trx - ts - ti -- sub %s) "