1 files changed, 34 insertions, 0 deletions
diff --git a/include/osmocom/sgsn/gprs_gmm_fsm.h b/include/osmocom/sgsn/gprs_gmm_fsm.h
new file mode 100644
index 000000000..fd5b4bff9
--- /dev/null
+++ b/include/osmocom/sgsn/gprs_gmm_fsm.h
@@ -0,0 +1,34 @@
+#pragma once
+
+#include <osmocom/core/fsm.h>
+
+/* 3GPP TS 24.008 § 4.1.3.3 GMM mobility management states on the network side */
+enum gmm_fsm_states {
+	ST_GMM_DEREGISTERED,		/* 4.1.3.3.1.1 */
+	ST_GMM_COMMON_PROC_INIT,	/* 4.1.3.3.1.2 */
+	ST_GMM_REGISTERED_NORMAL,	/* 4.1.3.3.2.1 */
+	ST_GMM_REGISTERED_SUSPENDED,	/* 4.1.3.3.2.2 */
+	ST_GMM_DEREGISTERED_INIT,	/* 4.1.3.3.1.4 */
+};
+
+enum gmm_fsm_events {
+	E_GMM_COMMON_PROC_INIT_REQ,
+	/* E_GMM_COMMON_PROC_FAILED, NOT USED */
+	/* E_GMM_LOWER_LAYER_FAILED, NOT USED */
+	E_GMM_COMMON_PROC_SUCCESS,
+	E_GMM_ATTACH_SUCCESS,
+	/* E_GMM_NET_INIT_DETACH_REQ, NOT USED */
+	/* E_GMM_MS_INIT_DETACH_REQ, NOT USED */
+	/* E_GMM_DETACH_ACCEPTED, */
+	E_GMM_SUSPEND,
+	E_GMM_RESUME,
+	E_GMM_CLEANUP,
+};
+
+static inline bool gmm_fsm_is_registered(struct osmo_fsm_inst *fi)
+{
+	return fi->state == ST_GMM_REGISTERED_NORMAL ||
+	       fi->state == ST_GMM_REGISTERED_SUSPENDED;
+}
+
+extern struct osmo_fsm gmm_fsm;