1 files changed, 61 insertions, 0 deletions
diff --git a/include/osmocom/hlr/hlr_ussd.h b/include/osmocom/hlr/hlr_ussd.h
new file mode 100644
index 0000000..08e810e
--- /dev/null
+++ b/include/osmocom/hlr/hlr_ussd.h
@@ -0,0 +1,61 @@
+#pragma once
+
+#include <stdbool.h>
+
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/gsm/gsup.h>
+
+#include <osmocom/hlr/gsup_server.h>
+
+#define NCSS_GUARD_TIMEOUT_DEFAULT 30
+
+struct hlr_ussd_route {
+	/* g_hlr.routes */
+	struct llist_head list;
+	const char *prefix;
+	bool is_external;
+	union {
+		struct hlr_euse *euse;
+		const struct hlr_iuse *iuse;
+	} u;
+};
+
+struct hlr_euse {
+	/* list in the per-hlr list of EUSEs */
+	struct llist_head list;
+	struct hlr *hlr;
+	/* name (must match the IPA ID tag) */
+	const char *name;
+	/* human-readable description */
+	const char *description;
+
+	/* GSUP connection to the EUSE, if any */
+	struct osmo_gsup_conn *conn;
+};
+
+struct hlr_euse *euse_find(struct hlr *hlr, const char *name);
+struct hlr_euse *euse_alloc(struct hlr *hlr, const char *name);
+void euse_del(struct hlr_euse *euse);
+
+const struct hlr_iuse *iuse_find(const char *name);
+
+struct hlr_ussd_route *ussd_route_find_prefix(struct hlr *hlr, const char *prefix);
+struct hlr_ussd_route *ussd_route_prefix_alloc_int(struct hlr *hlr, const char *prefix,
+						   const struct hlr_iuse *iuse);
+struct hlr_ussd_route *ussd_route_prefix_alloc_ext(struct hlr *hlr, const char *prefix,
+						   struct hlr_euse *euse);
+void ussd_route_del(struct hlr_ussd_route *rt);
+
+int rx_proc_ss_req(struct osmo_gsup_conn *conn, const struct osmo_gsup_message *gsup);
+int rx_proc_ss_error(struct osmo_gsup_conn *conn, const struct osmo_gsup_message *gsup);
+
+struct ss_session;
+struct ss_request;
+
+/* Internal USSD Handler */
+struct hlr_iuse {
+	const char *name;
+	/* call-back to be called for any incoming USSD messages for this IUSE */
+	int (*handle_ussd)(struct osmo_gsup_conn *conn, struct ss_session *ss,
+			   const struct osmo_gsup_message *gsup, const struct ss_request *req);
+};