176 lines
4.7 KiB
C
176 lines
4.7 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/core/fsm.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/msc/msc_a.h>
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#include <osmocom/msc/debug.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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struct vty;
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/* Used for late TID assignment */
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#define TRANS_ID_UNASSIGNED 0xff
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#define LOG_TRANS_CAT(trans, subsys, level, fmt, args...) \
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LOGP(subsys, level, \
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"trans(%s %s callref-0x%x tid-%u%s) " fmt, \
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(trans) ? trans_name(trans) : "NULL", \
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(trans) ? ((trans)->msc_a ? (trans)->msc_a->c.fi->id : vlr_subscr_name((trans)->vsub)) : "NULL", \
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(trans) ? (trans)->callref : 0, \
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(trans) ? (trans)->transaction_id : 0, \
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(trans) && (trans)->paging_request ? ",PAGING" : "", \
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##args)
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#define LOG_TRANS(trans, level, fmt, args...) \
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LOG_TRANS_CAT(trans, (trans) ? (trans)->log_subsys : DMSC, level, fmt, ##args)
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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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enum trans_type {
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TRANS_CC = GSM48_PDISC_CC,
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TRANS_SMS = GSM48_PDISC_SMS,
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TRANS_USSD = GSM48_PDISC_NC_SS,
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TRANS_SILENT_CALL,
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};
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extern const struct value_string trans_type_names[];
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static inline const char *trans_type_name(enum trans_type val)
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{ return get_value_string(trans_type_names, val); }
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uint8_t trans_type_to_gsm48_proto(enum trans_type type);
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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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/* What kind of transaction */
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enum trans_type type;
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/* Which category to log on, for LOG_TRANS(). */
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int log_subsys;
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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 msc_a *msc_a;
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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 paging_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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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 mncc_initiated; /* Whether an MNCC Release is necessary on failure */
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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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/* More Messages to Send (see 3GPP TS 29.002, section 7.6.8.7) */
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bool sm_rp_mmts_ind;
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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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struct {
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struct gsm0808_channel_type ct;
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struct osmo_sockaddr_str rtp_cn;
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struct vty *from_vty;
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} silent_call;
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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_type(const struct msc_a *msc_a, enum trans_type type);
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struct gsm_trans *trans_find_by_id(const struct msc_a *msc_a,
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enum trans_type type, 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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enum trans_type type, 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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enum trans_type type);
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struct gsm_trans *trans_has_conn(const struct msc_a *msc_a);
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void trans_conn_closed(const struct msc_a *msc_a);
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static inline int trans_log_subsys(enum trans_type type)
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{
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switch (type) {
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case TRANS_CC:
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case TRANS_SILENT_CALL:
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return DCC;
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case TRANS_SMS:
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return DLSMS;
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case TRANS_USSD:
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return DSS;
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default:
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break;
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}
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return DMSC;
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}
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const char *trans_name(const struct gsm_trans *trans);
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