121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
#pragma once
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#include <osmocom/msc/gsm_data.h>
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#include <osmocom/msc/gsm_subscriber.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/msc/gsm_04_11.h>
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#include <osmocom/msc/mncc.h>
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#include <osmocom/gsm/gsm0411_smc.h>
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#include <osmocom/gsm/gsm0411_smr.h>
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/* Used for late TID assignment */
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#define TRANS_ID_UNASSIGNED 0xff
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enum bridge_state {
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BRIDGE_STATE_NONE,
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BRIDGE_STATE_LOOPBACK_PENDING,
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BRIDGE_STATE_LOOPBACK_ESTABLISHED,
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BRIDGE_STATE_BRIDGE_PENDING,
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BRIDGE_STATE_BRIDGE_ESTABLISHED,
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};
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/* One transaction */
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struct gsm_trans {
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/* Entry in list of all transactions */
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struct llist_head entry;
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/* Back pointer to the network struct */
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struct gsm_network *net;
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/* The protocol within which we live */
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uint8_t protocol;
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/* The current transaction ID */
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uint8_t transaction_id;
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/* The DLCI (DCCH/ACCH + SAPI) of this transaction */
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uint8_t dlci;
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/* To whom we belong, unique identifier of remote MM entity */
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struct vlr_subscr *vsub;
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/* The associated connection we are using to transmit messages */
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struct ran_conn *conn;
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/* reference from MNCC or other application */
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uint32_t callref;
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/* if traffic channel receive was requested */
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int tch_recv;
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/* is thats one paging? */
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struct subscr_request *paging_request;
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/* bearer capabilities (rate and codec) */
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struct gsm_mncc_bearer_cap bearer_cap;
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/* if true, TCH_RTP_CREATE is sent after the
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* assignment is done */
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bool tch_rtp_create;
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union {
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struct {
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/* current call state */
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int state;
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/* current timer and message queue */
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int Tcurrent; /* current CC timer */
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int T308_second; /* used to send release again */
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struct osmo_timer_list timer;
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struct osmo_timer_list timer_guard;
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struct gsm_mncc msg; /* stores setup/disconnect/release message */
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bool assignment_started;
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} cc;
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struct {
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struct gsm411_smc_inst smc_inst;
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struct gsm411_smr_inst smr_inst;
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/* SM-RP-MR, Message Reference (see GSM TS 04.11, section 8.2.3) */
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uint8_t sm_rp_mr;
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struct gsm_sms *sms;
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} sms;
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struct {
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/**
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* Stores a GSM 04.80 message to be sent to
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* a subscriber after successful Paging Response
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*/
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struct msgb *msg;
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/* Inactivity timer, triggers transaction release */
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struct osmo_timer_list timer_guard;
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} ss;
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};
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struct {
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struct gsm_trans *peer;
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enum bridge_state state;
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} bridge;
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};
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struct gsm_trans *trans_find_by_id(const struct ran_conn *conn,
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uint8_t proto, uint8_t trans_id);
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struct gsm_trans *trans_find_by_callref(const struct gsm_network *net,
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uint32_t callref);
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struct gsm_trans *trans_find_by_sm_rp_mr(const struct gsm_network *net,
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const struct vlr_subscr *vsub,
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uint8_t sm_rp_mr);
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struct gsm_trans *trans_alloc(struct gsm_network *net,
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struct vlr_subscr *vsub,
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uint8_t protocol, uint8_t trans_id,
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uint32_t callref);
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void trans_free(struct gsm_trans *trans);
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int trans_assign_trans_id(const struct gsm_network *net, const struct vlr_subscr *vsub,
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uint8_t protocol);
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struct gsm_trans *trans_has_conn(const struct ran_conn *conn);
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void trans_conn_closed(const struct ran_conn *conn);
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