140 lines
4.5 KiB
C
140 lines
4.5 KiB
C
#pragma once
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#include <osmocom/core/fsm.h>
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#include <osmocom/core/prim.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/linuxrbtree.h>
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#include <osmocom/core/tdef.h>
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#include <osmocom/sigtran/sccp_sap.h>
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#include <osmocom/sigtran/osmo_ss7.h>
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#include <osmocom/sigtran/protocol/mtp.h>
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#define SCCP_STR "Signalling Connection Control Part\n"
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/* Appendix C.4 of Q.714 */
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enum osmo_sccp_timer {
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/* 0 kept unused on purpose since it's handled specially by osmo_fsm */
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OSMO_SCCP_TIMER_CONN_EST = 1,
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OSMO_SCCP_TIMER_IAS,
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OSMO_SCCP_TIMER_IAR,
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OSMO_SCCP_TIMER_REL,
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OSMO_SCCP_TIMER_REPEAT_REL,
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OSMO_SCCP_TIMER_INT,
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OSMO_SCCP_TIMER_GUARD,
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OSMO_SCCP_TIMER_RESET,
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OSMO_SCCP_TIMER_REASSEMBLY,
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/* This must remain the last item: */
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OSMO_SCCP_TIMERS_LEN
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};
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extern const struct osmo_tdef osmo_sccp_timer_defaults[OSMO_SCCP_TIMERS_LEN];
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extern const struct value_string osmo_sccp_timer_names[];
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static inline const char *osmo_sccp_timer_name(enum osmo_sccp_timer val)
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{ return get_value_string(osmo_sccp_timer_names, val); }
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/* an instance of the SCCP stack */
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struct osmo_sccp_instance {
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/* entry in global list of ss7 instances */
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struct llist_head list;
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/* rbtree root of 'struct sccp_connection' in this instance */
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struct rb_root connections;
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/* list of SCCP users in this instance */
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struct llist_head users;
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/* routing context to be used in all outbound messages */
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uint32_t route_ctx;
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/* next connection ID to allocate */
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uint32_t next_id;
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struct osmo_ss7_instance *ss7;
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void *priv;
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struct osmo_ss7_user ss7_user;
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struct osmo_tdef *tdefs;
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uint32_t max_optional_data;
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};
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struct osmo_sccp_user {
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/*! \brief entry in list of sccp users of \ref osmo_sccp_instance */
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struct llist_head list;
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/*! \brief pointer back to SCCP instance */
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struct osmo_sccp_instance *inst;
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/*! \brief human-readable name of this user */
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char *name;
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/*! \brief SSN and/or point code to which we are bound */
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uint16_t ssn;
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uint32_t pc;
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/* set if we are a server */
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struct llist_head links;
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/* user call-back function in case of incoming primitives */
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osmo_prim_cb prim_cb;
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void *priv;
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/* Application Server FSM Instance */
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struct osmo_fsm_inst *as_fi;
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};
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extern int DSCCP;
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struct xua_msg;
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struct osmo_sccp_user *
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sccp_user_find(struct osmo_sccp_instance *inst, uint16_t ssn, uint32_t pc);
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/* Message from SCOC -> SCRC */
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int sccp_scrc_rx_scoc_conn_msg(struct osmo_sccp_instance *inst,
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struct xua_msg *xua);
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/* Message from SCLC -> SCRC */
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int sccp_scrc_rx_sclc_msg(struct osmo_sccp_instance *inst, struct xua_msg *xua);
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/* Message from MTP (SUA) -> SCRC */
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int scrc_rx_mtp_xfer_ind_xua(struct osmo_sccp_instance *inst,
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struct xua_msg *xua);
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/* Message from SCRC -> SCOC */
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void sccp_scoc_rx_from_scrc(struct osmo_sccp_instance *inst,
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struct xua_msg *xua);
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void sccp_scoc_rx_scrc_rout_fail(struct osmo_sccp_instance *inst,
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struct xua_msg *xua, uint32_t cause);
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void sccp_scoc_flush_connections(struct osmo_sccp_instance *inst);
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/* Message from SCRC -> SCLC */
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int sccp_sclc_rx_from_scrc(struct osmo_sccp_instance *inst,
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struct xua_msg *xua);
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void sccp_sclc_rx_scrc_rout_fail(struct osmo_sccp_instance *inst,
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struct xua_msg *xua, uint32_t cause);
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int sccp_user_prim_up(struct osmo_sccp_user *scut, struct osmo_scu_prim *prim);
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/* SCU -> SCLC */
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int sccp_sclc_user_sap_down(struct osmo_sccp_user *scu, struct osmo_prim_hdr *oph);
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int sccp_sclc_user_sap_down_nofree(struct osmo_sccp_user *scu, struct osmo_prim_hdr *oph);
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struct msgb *sccp_msgb_alloc(const char *name);
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extern struct osmo_fsm sccp_scoc_fsm;
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void sccp_scoc_show_connections(struct vty *vty, struct osmo_sccp_instance *inst);
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void osmo_sccp_vty_write_cs7_node(struct vty *vty, const char *indent, struct osmo_sccp_instance *inst);
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/* Local Broadcast (LBCS) */
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void sccp_lbcs_local_bcast_pcstate(struct osmo_sccp_instance *inst,
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const struct osmo_scu_pcstate_param *pcstate);
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void sccp_lbcs_local_bcast_state(struct osmo_sccp_instance *inst,
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const struct osmo_scu_state_param *state);
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/* SCCP Management (SCMG) */
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void sccp_scmg_rx_ssn_allowed(struct osmo_sccp_instance *inst, uint32_t dpc, uint32_t ssn, uint32_t smi);
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void sccp_scmg_rx_ssn_prohibited(struct osmo_sccp_instance *inst, uint32_t dpc, uint32_t ssn, uint32_t smi);
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void sccp_scmg_rx_mtp_pause(struct osmo_sccp_instance *inst, uint32_t dpc);
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void sccp_scmg_rx_mtp_resume(struct osmo_sccp_instance *inst, uint32_t dpc);
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void sccp_scmg_rx_mtp_status(struct osmo_sccp_instance *inst, uint32_t dpc, enum mtp_unavail_cause cause);
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int sccp_scmg_init(struct osmo_sccp_instance *inst);
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