1 files changed, 85 insertions, 1 deletions
diff --git a/src/sccp_internal.h b/src/sccp_internal.h
index 7287a82..c35ef4b 100644
--- a/src/sccp_internal.h
+++ b/src/sccp_internal.h
@@ -1,5 +1,89 @@
 #pragma once
 
-#include <osmocom/core/msgb.h>
+#include <osmocom/core/fsm.h>
+#include <osmocom/core/prim.h>
+#include <osmocom/sigtran/sccp_sap.h>
+#include <osmocom/sigtran/osmo_ss7.h>
+
+/* an instance of the SCCP stack */
+struct osmo_sccp_instance {
+	/* entry in global list of ss7 instances */
+	struct llist_head list;
+	/* list of 'struct sccp_connection' in this instance */
+	struct llist_head connections;
+	/* list of SCCP users in this instance */
+	struct llist_head users;
+	/* routing context to be used in all outbound messages */
+	uint32_t route_ctx;
+	/* next local reference to allocate */
+	uint32_t next_id;
+	struct osmo_ss7_instance *ss7;
+	void *priv;
+
+	struct osmo_ss7_user ss7_user;
+};
+
+struct osmo_sccp_user {
+	/*! \brief entry in list of sccp users of \ref osmo_sccp_instance */
+	struct llist_head list;
+	/*! \brief pointer back to SCCP instance */
+	struct osmo_sccp_instance *inst;
+	/*! \brief human-readable name of this user */
+	char *name;
+
+	/*! \brief SSN and/or point code to which we are bound */
+	uint16_t ssn;
+	uint32_t pc;
+	bool pc_valid;
+
+	/* set if we are a server */
+	struct llist_head links;
+
+	/* user call-back function in case of incoming primitives */
+	osmo_prim_cb prim_cb;
+	void *priv;
+
+	/* Application Server FSM Instance */
+	struct osmo_fsm_inst *as_fi;
+};
+
+extern int DSCCP;
+
+struct xua_msg;
+
+struct osmo_sccp_user *
+sccp_user_find(struct osmo_sccp_instance *inst, uint16_t ssn, uint32_t pc);
+
+/* Message from SCOC -> SCRC */
+int sccp_scrc_rx_scoc_conn_msg(struct osmo_sccp_instance *inst,
+				struct xua_msg *xua);
+
+/* Message from SCLC -> SCRC */
+int sccp_scrc_rx_sclc_msg(struct osmo_sccp_instance *inst, struct xua_msg *xua);
+
+/* Message from MTP (SUA) -> SCRC */
+int scrc_rx_mtp_xfer_ind_xua(struct osmo_sccp_instance *inst,
+			     struct xua_msg *xua);
+
+/* Message from SCRC -> SCOC */
+void sccp_scoc_rx_from_scrc(struct osmo_sccp_instance *inst,
+			    struct xua_msg *xua);
+void sccp_scoc_rx_scrc_rout_fail(struct osmo_sccp_instance *inst,
+				 struct xua_msg *xua, uint32_t cause);
+
+void sccp_scoc_flush_connections(struct osmo_sccp_instance *inst);
+
+/* Message from SCRC -> SCLC */
+int sccp_sclc_rx_from_scrc(struct osmo_sccp_instance *inst,
+			   struct xua_msg *xua);
+void sccp_sclc_rx_scrc_rout_fail(struct osmo_sccp_instance *inst,
+				 struct xua_msg *xua, uint32_t cause);
+
+int sccp_user_prim_up(struct osmo_sccp_user *scut, struct osmo_scu_prim *prim);
+
+/* SCU -> SCLC */
+int sccp_sclc_user_sap_down(struct osmo_sccp_user *scu, struct osmo_prim_hdr *oph);
 
 struct msgb *sccp_msgb_alloc(const char *name);
+
+struct osmo_fsm sccp_scoc_fsm;