Add structures defining decoded TS 23.003 identities

Change-Id: I6423f8d75bb3e7aeca285854ab3232a087d62b57
Reviewed-on: https://gerrit.osmocom.org/304
Reviewed-by: Harald Welte <laforge@gnumonks.org>
Tested-by: Jenkins Builder
diff --git a/include/osmocom/gsm/gsm23003.h b/include/osmocom/gsm/gsm23003.h
new file mode 100644
index 0000000..29e646c
--- /dev/null
+++ b/include/osmocom/gsm/gsm23003.h
@@ -0,0 +1,80 @@
+#pragma once
+#include <stdint.h>
+
+/* 23.003 Chapter 12.1 */
+struct osmo_plmn_id {
+	uint16_t mcc;
+	uint16_t mnc;
+};
+
+/* 4.1 */
+struct osmo_location_area_id {
+	struct osmo_plmn_id plmn;
+	uint16_t lac;
+};
+
+/* 4.2 */
+struct osmo_routing_area_id {
+	struct osmo_location_area_id lac;
+	uint8_t rac;
+};
+
+/* 4.3.1 */
+struct osmo_cell_global_id {
+	struct osmo_location_area_id lai;
+	uint16_t cell_identity;
+};
+
+/* 12.5 */
+struct osmo_service_area_id {
+	struct osmo_location_area_id lai;
+	uint16_t sac;
+};
+
+/* 12.6 */
+struct osmo_shared_network_area_id {
+	struct osmo_plmn_id plmn;
+	uint32_t snac;
+};
+
+/* 5.1 */
+enum osmo_gsn_addr_type {
+	GSN_ADDR_TYPE_IPV4	= 0,
+	GSN_ADDR_TYPE_IPV6	= 1,
+};
+
+/* 5.1 */
+struct osmo_gsn_address {
+	enum osmo_gsn_addr_type type;
+	uint8_t length;
+	uint8_t addr[16];
+};
+
+/* 19.4.2.3 */
+struct osmo_tracking_area_id {
+	struct osmo_plmn_id plmn;
+	uint16_t tac;
+};
+
+struct osmo_eutran_cell_global_id {
+	struct osmo_plmn_id plmn;
+	uint32_t eci; /* FIXME */
+};
+
+/* 2.8.1 */
+struct osmo_mme_id {
+	uint16_t group_id;
+	uint8_t code;
+};
+
+/* 2.8.1 */
+struct osmo_gummei {
+	struct osmo_plmn_id plmn;
+	struct osmo_mme_id mme;
+};
+
+/* 2.8.1 */
+struct osmo_guti {
+	struct osmo_gummei gummei;
+	uint32_t mtmsi;
+};