bsc/ussd: Send faked CM Service Accept before sending USSD
The MS do not show the USSD messages yet. This patch modifies the
implementation to insert a CM Service Accept before the ussdNotify
to finish the establishment of the MM connection according to
3GPP TS 04.10/3.2.1.
This fix has been tested with a Blackberry phone that has shown
an ussd_grace_txt after rf_locked has been set to '1'. Without this
patch, that message wasn't shown. The phone has sent a CC Setup
and other messages before processing the channel release message sent
by the BSC, but these messages have not been forwarded to the MSC (as
expected).
Ticket: OW#957
Sponsored-by: On-Waves ehf
diff --git a/openbsc/src/libmsc/gsm_04_08.c b/openbsc/src/libmsc/gsm_04_08.c
index c41443e..df985ca 100644
--- a/openbsc/src/libmsc/gsm_04_08.c
+++ b/openbsc/src/libmsc/gsm_04_08.c
@@ -804,14 +804,14 @@
return gsm48_tx_simple(conn, GSM48_PDISC_MM, GSM48_MT_MM_AUTH_REJ);
}
-static int gsm48_tx_mm_serv_ack(struct gsm_subscriber_connection *conn)
+int gsm48_tx_mm_serv_ack(struct gsm_subscriber_connection *conn)
{
DEBUGP(DMM, "-> CM SERVICE ACK\n");
return gsm48_tx_simple(conn, GSM48_PDISC_MM, GSM48_MT_MM_CM_SERV_ACC);
}
/* 9.2.6 CM service reject */
-static int gsm48_tx_mm_serv_rej(struct gsm_subscriber_connection *conn,
+int gsm48_tx_mm_serv_rej(struct gsm_subscriber_connection *conn,
enum gsm48_reject_value value)
{
struct msgb *msg;