Add SGs Interface
Add an SGs interface (3GPP TS 29.118) to osmo-msc in order to support
SMS tunneling and Circuit Switched Fallback (CSFB)
Change-Id: I73359925fc1ca72b33a1466e6ac41307f2f0b11d
Related: OS#3615
diff --git a/src/libvlr/vlr_sgs_fsm.h b/src/libvlr/vlr_sgs_fsm.h
new file mode 100644
index 0000000..94f202b
--- /dev/null
+++ b/src/libvlr/vlr_sgs_fsm.h
@@ -0,0 +1,42 @@
+/* (C) 2018-2019 by sysmocom s.f.m.c. GmbH
+ * All Rights Reserved
+ *
+ * Author: Harald Welte, Philipp Maier
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#pragma once
+
+enum sgs_ue_fsm_event {
+ SGS_UE_E_VLR_FAILURE,
+ SGS_UE_E_RX_RESET_FROM_MME,
+ SGS_UE_E_RX_DETACH_IND_FROM_MME,
+ SGS_UE_E_RX_DETACH_IND_FROM_UE,
+ SGS_UE_E_RX_LU_FROM_A_IU_GS,
+ SGS_UE_E_RX_PAGING_FAILURE,
+ SGS_UE_E_RX_ALERT_FAILURE,
+ SGS_UE_E_RX_LU_FROM_MME,
+ SGS_UE_E_TX_LU_REJECT,
+ SGS_UE_E_TX_LU_ACCEPT,
+ SGS_UE_E_TX_PAGING,
+ SGS_UE_E_RX_SGSAP_UE_UNREACHABLE,
+ SGS_UE_E_RX_TMSI_REALLOC,
+};
+
+void vlr_sgs_fsm_init(void);
+void vlr_sgs_fsm_create(struct vlr_subscr *vsub);
+void vlr_sgs_fsm_remove(struct vlr_subscr *vsub);
+void vlr_sgs_fsm_update_id(struct vlr_subscr *vsub);