mirror of https://gerrit.osmocom.org/libosmocore
167 lines
4.1 KiB
C
167 lines
4.1 KiB
C
#ifndef _GPRS_BSSGP_H
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#define _GPRS_BSSGP_H
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#include <stdint.h>
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#include <osmocom/gsm/gsm48.h>
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#include <osmocom/gsm/prim.h>
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#include <osmocom/gprs/protocol/gsm_08_18.h>
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/* gprs_bssgp_util.c */
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extern struct gprs_ns_inst *bssgp_nsi;
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struct msgb *bssgp_msgb_alloc(void);
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const char *bssgp_cause_str(enum gprs_bssgp_cause cause);
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/* Transmit a simple response such as BLOCK/UNBLOCK/RESET ACK/NACK */
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int bssgp_tx_simple_bvci(uint8_t pdu_type, uint16_t nsei,
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uint16_t bvci, uint16_t ns_bvci);
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/* Chapter 10.4.14: Status */
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int bssgp_tx_status(uint8_t cause, uint16_t *bvci, struct msgb *orig_msg);
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enum bssgp_prim {
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PRIM_BSSGP_DL_UD,
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PRIM_BSSGP_UL_UD,
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PRIM_BSSGP_PTM_UD,
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PRIM_BSSGP_GMM_SUSPEND,
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PRIM_BSSGP_GMM_RESUME,
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PRIM_BSSGP_GMM_PAGING,
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PRIM_NM_FLUSH_LL,
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PRIM_NM_LLC_DISCARDED,
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PRIM_NM_BVC_RESET,
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PRIM_NM_BVC_BLOCK,
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PRIM_NM_BVC_UNBLOCK,
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};
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struct osmo_bssgp_prim {
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struct osmo_prim_hdr oph;
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/* common fields */
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uint16_t nsei;
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uint16_t bvci;
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uint32_t tlli;
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struct tlv_parsed *tp;
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struct gprs_ra_id *ra_id;
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/* specific fields */
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union {
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struct {
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uint8_t *suspend_ref;
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} resume;
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} u;
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};
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/* gprs_bssgp.c */
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#define BVC_S_BLOCKED 0x0001
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/* The per-BTS context that we keep on the SGSN side of the BSSGP link */
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struct bssgp_bvc_ctx {
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struct llist_head list;
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struct gprs_ra_id ra_id; /*!< parsed RA ID of the remote BTS */
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uint16_t cell_id; /*!< Cell ID of the remote BTS */
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/* NSEI and BVCI of underlying Gb link. Together they
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* uniquely identify a link to a BTS (5.4.4) */
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uint16_t bvci;
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uint16_t nsei;
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uint32_t state;
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struct rate_ctr_group *ctrg;
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/* we might want to add this as a shortcut later, avoiding the NSVC
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* lookup for every packet, similar to a routing cache */
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//struct gprs_nsvc *nsvc;
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};
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extern struct llist_head bssgp_bvc_ctxts;
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/* Find a BTS Context based on parsed RA ID and Cell ID */
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struct bssgp_bvc_ctx *btsctx_by_raid_cid(const struct gprs_ra_id *raid, uint16_t cid);
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/* Find a BTS context based on BVCI+NSEI tuple */
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struct bssgp_bvc_ctx *btsctx_by_bvci_nsei(uint16_t bvci, uint16_t nsei);
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#define BVC_F_BLOCKED 0x0001
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enum bssgp_ctr {
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BSSGP_CTR_PKTS_IN,
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BSSGP_CTR_PKTS_OUT,
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BSSGP_CTR_BYTES_IN,
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BSSGP_CTR_BYTES_OUT,
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BSSGP_CTR_BLOCKED,
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BSSGP_CTR_DISCARDED,
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};
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#include <osmocom/gsm/tlv.h>
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#include <osmocom/gprs/gprs_msgb.h>
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/* BSSGP-UL-UNITDATA.ind */
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int bssgp_rcvmsg(struct msgb *msg);
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/* BSSGP-DL-UNITDATA.req */
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struct bssgp_lv {
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uint16_t len;
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uint8_t *v;
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};
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/* parameters for BSSGP downlink userdata transmission */
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struct bssgp_dl_ud_par {
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uint32_t *tlli;
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char *imsi;
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uint16_t drx_parms;
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/* FIXME: priority */
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struct bssgp_lv ms_ra_cap;
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uint8_t qos_profile[3];
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};
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int bssgp_tx_dl_ud(struct msgb *msg, uint16_t pdu_lifetime,
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struct bssgp_dl_ud_par *dup);
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uint16_t bssgp_parse_cell_id(struct gprs_ra_id *raid, const uint8_t *buf);
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int bssgp_create_cell_id(uint8_t *buf, const struct gprs_ra_id *raid,
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uint16_t cid);
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/* Wrapper around TLV parser to parse BSSGP IEs */
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static inline int bssgp_tlv_parse(struct tlv_parsed *tp, uint8_t *buf, int len)
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{
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return tlv_parse(tp, &tvlv_att_def, buf, len, 0, 0);
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}
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/*! \brief BSSGP Paging mode */
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enum bssgp_paging_mode {
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BSSGP_PAGING_PS,
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BSSGP_PAGING_CS,
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};
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/*! \brief BSSGP Paging scope */
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enum bssgp_paging_scope {
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BSSGP_PAGING_BSS_AREA, /*!< all cells in BSS */
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BSSGP_PAGING_LOCATION_AREA, /*!< all cells in LA */
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BSSGP_PAGING_ROUTEING_AREA, /*!< all cells in RA */
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BSSGP_PAGING_BVCI, /*!< one cell */
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};
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/*! \brief BSSGP paging information */
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struct bssgp_paging_info {
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enum bssgp_paging_mode mode; /*!< CS or PS paging */
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enum bssgp_paging_scope scope; /*!< bssgp_paging_scope */
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struct gprs_ra_id raid; /*!< RA Identifier */
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uint16_t bvci; /*!< BVCI */
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char *imsi; /*!< IMSI, if any */
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uint32_t *ptmsi; /*!< P-TMSI, if any */
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uint16_t drx_params; /*!< DRX parameters */
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uint8_t qos[3]; /*!< QoS parameters */
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};
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/* Send a single GMM-PAGING.req to a given NSEI/NS-BVCI */
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int bssgp_tx_paging(uint16_t nsei, uint16_t ns_bvci,
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struct bssgp_paging_info *pinfo);
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/* gprs_bssgp_vty.c */
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int bssgp_vty_init(void);
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void bssgp_set_log_ss(int ss);
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int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx);
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#endif /* _GPRS_BSSGP_H */
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