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Diffstat (limited to 'include/osmocom/gprs/gprs_bssgp.h')
| -rw-r--r-- | include/osmocom/gprs/gprs_bssgp.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/include/osmocom/gprs/gprs_bssgp.h b/include/osmocom/gprs/gprs_bssgp.h new file mode 100644 index 00000000..949dbdc8 --- /dev/null +++ b/include/osmocom/gprs/gprs_bssgp.h @@ -0,0 +1,166 @@ +#ifndef _GPRS_BSSGP_H +#define _GPRS_BSSGP_H + +#include <stdint.h> + +#include <osmocom/gsm/gsm48.h> +#include <osmocom/gsm/prim.h> + +#include <osmocom/gprs/protocol/gsm_08_18.h> + +/* gprs_bssgp_util.c */ +extern struct gprs_ns_inst *bssgp_nsi; +struct msgb *bssgp_msgb_alloc(void); +const char *bssgp_cause_str(enum gprs_bssgp_cause cause); +/* Transmit a simple response such as BLOCK/UNBLOCK/RESET ACK/NACK */ +int bssgp_tx_simple_bvci(uint8_t pdu_type, uint16_t nsei, + uint16_t bvci, uint16_t ns_bvci); +/* Chapter 10.4.14: Status */ +int bssgp_tx_status(uint8_t cause, uint16_t *bvci, struct msgb *orig_msg); + +enum bssgp_prim { + PRIM_BSSGP_DL_UD, + PRIM_BSSGP_UL_UD, + PRIM_BSSGP_PTM_UD, + + PRIM_BSSGP_GMM_SUSPEND, + PRIM_BSSGP_GMM_RESUME, + PRIM_BSSGP_GMM_PAGING, + + PRIM_NM_FLUSH_LL, + PRIM_NM_LLC_DISCARDED, + PRIM_NM_BVC_RESET, + PRIM_NM_BVC_BLOCK, + PRIM_NM_BVC_UNBLOCK, +}; + +struct osmo_bssgp_prim { + struct osmo_prim_hdr oph; + + /* common fields */ + uint16_t nsei; + uint16_t bvci; + uint32_t tlli; + struct tlv_parsed *tp; + struct gprs_ra_id *ra_id; + + /* specific fields */ + union { + struct { + uint8_t *suspend_ref; + } resume; + } u; +}; + +/* gprs_bssgp.c */ + +#define BVC_S_BLOCKED 0x0001 + +/* The per-BTS context that we keep on the SGSN side of the BSSGP link */ +struct bssgp_bvc_ctx { + struct llist_head list; + + struct gprs_ra_id ra_id; /*!< parsed RA ID of the remote BTS */ + uint16_t cell_id; /*!< Cell ID of the remote BTS */ + + /* NSEI and BVCI of underlying Gb link. Together they + * uniquely identify a link to a BTS (5.4.4) */ + uint16_t bvci; + uint16_t nsei; + + uint32_t state; + + struct rate_ctr_group *ctrg; + + /* we might want to add this as a shortcut later, avoiding the NSVC + * lookup for every packet, similar to a routing cache */ + //struct gprs_nsvc *nsvc; +}; +extern struct llist_head bssgp_bvc_ctxts; +/* Find a BTS Context based on parsed RA ID and Cell ID */ +struct bssgp_bvc_ctx *btsctx_by_raid_cid(const struct gprs_ra_id *raid, uint16_t cid); +/* Find a BTS context based on BVCI+NSEI tuple */ +struct bssgp_bvc_ctx *btsctx_by_bvci_nsei(uint16_t bvci, uint16_t nsei); + +#define BVC_F_BLOCKED 0x0001 + +enum bssgp_ctr { + BSSGP_CTR_PKTS_IN, + BSSGP_CTR_PKTS_OUT, + BSSGP_CTR_BYTES_IN, + BSSGP_CTR_BYTES_OUT, + BSSGP_CTR_BLOCKED, + BSSGP_CTR_DISCARDED, +}; + + +#include <osmocom/gsm/tlv.h> +#include <osmocom/gprs/gprs_msgb.h> + +/* BSSGP-UL-UNITDATA.ind */ +int bssgp_rcvmsg(struct msgb *msg); + +/* BSSGP-DL-UNITDATA.req */ +struct bssgp_lv { + uint16_t len; + uint8_t *v; +}; +/* parameters for BSSGP downlink userdata transmission */ +struct bssgp_dl_ud_par { + uint32_t *tlli; + char *imsi; + uint16_t drx_parms; + /* FIXME: priority */ + struct bssgp_lv ms_ra_cap; + uint8_t qos_profile[3]; +}; +int bssgp_tx_dl_ud(struct msgb *msg, uint16_t pdu_lifetime, + struct bssgp_dl_ud_par *dup); + +uint16_t bssgp_parse_cell_id(struct gprs_ra_id *raid, const uint8_t *buf); +int bssgp_create_cell_id(uint8_t *buf, const struct gprs_ra_id *raid, + uint16_t cid); + +/* Wrapper around TLV parser to parse BSSGP IEs */ +static inline int bssgp_tlv_parse(struct tlv_parsed *tp, uint8_t *buf, int len) +{ + return tlv_parse(tp, &tvlv_att_def, buf, len, 0, 0); +} + +/*! \brief BSSGP Paging mode */ +enum bssgp_paging_mode { + BSSGP_PAGING_PS, + BSSGP_PAGING_CS, +}; + +/*! \brief BSSGP Paging scope */ +enum bssgp_paging_scope { + BSSGP_PAGING_BSS_AREA, /*!< all cells in BSS */ + BSSGP_PAGING_LOCATION_AREA, /*!< all cells in LA */ + BSSGP_PAGING_ROUTEING_AREA, /*!< all cells in RA */ + BSSGP_PAGING_BVCI, /*!< one cell */ +}; + +/*! \brief BSSGP paging information */ +struct bssgp_paging_info { + enum bssgp_paging_mode mode; /*!< CS or PS paging */ + enum bssgp_paging_scope scope; /*!< bssgp_paging_scope */ + struct gprs_ra_id raid; /*!< RA Identifier */ + uint16_t bvci; /*!< BVCI */ + char *imsi; /*!< IMSI, if any */ + uint32_t *ptmsi; /*!< P-TMSI, if any */ + uint16_t drx_params; /*!< DRX parameters */ + uint8_t qos[3]; /*!< QoS parameters */ +}; + +/* Send a single GMM-PAGING.req to a given NSEI/NS-BVCI */ +int bssgp_tx_paging(uint16_t nsei, uint16_t ns_bvci, + struct bssgp_paging_info *pinfo); + +/* gprs_bssgp_vty.c */ +int bssgp_vty_init(void); +void bssgp_set_log_ss(int ss); + +int bssgp_prim_cb(struct osmo_prim_hdr *oph, void *ctx); + +#endif /* _GPRS_BSSGP_H */ |