move two gsm0480_send_*() to xsc as gsm0480_gen_*()

Have two separate gsm0480_send_ussdNotify() and gsm0480_send_releaseComplete()
for each of libbsc and libmsc. Move their core into libxsc as generator
functions returning a msgb.

Add src/libbsc/gsm_04_80_utils.c (note, not 04_08) to implement the libbsc
side of it.

The code is identical, but the linked structs and functions differ in each
case. There could be a common source file built for both, but I decided against
it, for more clarity I hope.

1 files changed, 3 insertions, 0 deletions

diff --git a/openbsc/include/openbsc/gsm_04_80.h b/openbsc/include/openbsc/gsm_04_80.h
index 0a6065234..23f20c463 100644
--- a/openbsc/include/openbsc/gsm_04_80.h
+++ b/openbsc/include/openbsc/gsm_04_80.h
@@ -14,6 +14,9 @@ int gsm0480_send_ussd_reject(struct gsm_subscriber_connection *conn,
 			     const struct msgb *msg, 
 			     const struct ussd_request *request);
 
+struct msgb *gsm0480_gen_ussdNotify(int level, const char *text);
+struct msgb *gsm0480_gen_releaseComplete(void);
+
 int gsm0480_send_ussdNotify(struct gsm_subscriber_connection *conn, int level, const char *text);
 int gsm0480_send_releaseComplete(struct gsm_subscriber_connection *conn);