1 files changed, 122 insertions, 0 deletions
diff --git a/include/osmocom/gsm/iuup.h b/include/osmocom/gsm/iuup.h
new file mode 100644
index 00000000..b1651c59
--- /dev/null
+++ b/include/osmocom/gsm/iuup.h
@@ -0,0 +1,122 @@
+#pragma once
+
+#include <stdint.h>
+
+#include <osmocom/core/prim.h>
+#include <osmocom/gsm/protocol/gsm_25_415.h>
+
+/***********************************************************************
+ * Primitives towards the lower layers (typically RTP transport)
+ ***********************************************************************/
+enum osmo_iuup_tnl_prim_type {
+	OSMO_IUUP_TNL_UNITDATA,
+};
+
+struct osmo_iuup_tnl_prim {
+	struct osmo_prim_hdr oph;
+};
+
+/***********************************************************************
+ * Primitives towards the upper layers at the RNL SAP
+ ***********************************************************************/
+
+/* 3GPP TS 25.415 Section 7.2.1 */
+enum osmo_iuup_rnl_prim_type {
+	OSMO_IUUP_RNL_CONFIG,
+	OSMO_IUUP_RNL_DATA,
+	OSMO_IUUP_RNL_STATUS,
+	OSMO_IUUP_RNL_UNIT_DATA,
+};
+
+/* TS 25.413 9.2.1.3*/
+#define IUUP_MAX_SUBFLOWS 7
+#define IUUP_MAX_RFCIS 64
+
+#define IUUP_TIMER_INIT_T_DEFAULT 1000
+#define IUUP_TIMER_TA_T_DEFAULT 500
+#define IUUP_TIMER_RC_T_DEFAULT 500
+#define IUUP_TIMER_INIT_N_DEFAULT 3
+#define IUUP_TIMER_TA_N_DEFAULT 1
+#define IUUP_TIMER_RC_N_DEFAULT 1
+struct osmo_iuup_rnl_config_timer {
+	uint32_t t_ms;	/* time in ms */
+	uint32_t n_max;	/* max number of repetitions */
+};
+struct osmo_iuup_rnl_config {
+	/* transparent (true) or SMpSDU (false): */
+	bool transparent;
+
+	/* should we actively transmit INIT in SmpSDU mode? */
+	bool active;
+
+	/* Currently Version 0 or 1: */
+	uint8_t data_pdu_type;
+
+	/* Supported mode versions */
+	uint16_t supported_versions_mask;
+	uint8_t num_rfci;
+	uint8_t num_subflows;
+	uint16_t subflow_sizes[IUUP_MAX_RFCIS][IUUP_MAX_SUBFLOWS];
+	bool IPTIs_present;
+	uint8_t IPTIs[IUUP_MAX_RFCIS]; /* values range 0-15, 4 bits */
+
+	/* TODO: Indication of delivery of erroneous SDUs*/
+	struct osmo_iuup_rnl_config_timer t_init;
+	struct osmo_iuup_rnl_config_timer t_ta;
+	struct osmo_iuup_rnl_config_timer t_rc;
+};
+
+struct osmo_iuup_rnl_data {
+	uint8_t rfci;
+	uint8_t frame_nr;
+	uint8_t fqc;
+};
+
+struct osmo_iuup_rnl_status {
+	enum iuup_procedure procedure;
+	union {
+		struct {
+			enum iuup_error_cause cause;
+			enum iuup_error_distance distance;
+		} error_event;
+		struct {
+			uint16_t supported_versions_mask;
+			uint8_t num_subflows;
+			uint8_t num_rfci;
+			uint16_t subflow_sizes[IUUP_MAX_RFCIS][IUUP_MAX_SUBFLOWS];
+			bool IPTIs_present;
+			uint8_t IPTIs[IUUP_MAX_RFCIS]; /* values range 0-15, 4 bits */
+		} initialization;
+		struct {
+		} rate_control;
+		struct {
+		} time_alignment;
+	} u;
+};
+
+/* SAP on the upper side of IuUP, towards the user */
+struct osmo_iuup_rnl_prim {
+	struct osmo_prim_hdr oph;
+	union {
+		struct osmo_iuup_rnl_config config;
+		struct osmo_iuup_rnl_data data;
+		struct osmo_iuup_rnl_status status;
+		//struct osmo_iuup_rnl_unitdata unitdata;
+	} u;
+};
+
+struct osmo_iuup_instance;
+struct osmo_iuup_instance *osmo_iuup_instance_alloc(void *ctx, const char *id);
+void osmo_iuup_instance_free(struct osmo_iuup_instance *iui);
+
+void osmo_iuup_instance_set_user_prim_cb(struct osmo_iuup_instance *iui, osmo_prim_cb func, void *priv);
+void osmo_iuup_instance_set_transport_prim_cb(struct osmo_iuup_instance *iui, osmo_prim_cb func, void *priv);
+int osmo_iuup_tnl_prim_up(struct osmo_iuup_instance *iui, struct osmo_iuup_tnl_prim *itp);
+int osmo_iuup_rnl_prim_down(struct osmo_iuup_instance *inst, struct osmo_iuup_rnl_prim *irp);
+
+
+int osmo_iuup_compute_header_crc(const uint8_t *iuup_pdu, unsigned int pdu_len);
+int osmo_iuup_compute_payload_crc(const uint8_t *iuup_pdu, unsigned int pdu_len);
+
+struct osmo_iuup_rnl_prim *osmo_iuup_rnl_prim_alloc(void *ctx, unsigned int primitive, unsigned int operation, unsigned int size);
+struct osmo_iuup_tnl_prim *osmo_iuup_tnl_prim_alloc(void *ctx, unsigned int primitive, unsigned int operation, unsigned int size);