#ifndef _GPRS_BSSGP_H #define _GPRS_BSSGP_H #include #include #include #include #include #include /* 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 */ /*! \brief BSSGP flow control (SGSN side) According to Section 8.2 */ struct bssgp_flow_control { uint32_t bucket_size_max; /*!< maximum size of the bucket */ uint32_t bucket_leak_rate; /*!< leak rate of the bucket */ uint32_t bucket_counter; /*!< number of tokens in the bucket */ struct timeval time_last_pdu; /*!< timestamp of last PDU sent */ /* the built-in queue */ uint32_t max_queue_depth; /*!< how many packets to queue */ uint32_t queue_depth; /*!< current length of queue */ struct llist_head queue; /*!< linked list of msgb's */ struct osmo_timer_list timer; /*!< timer-based dequeueing */ /*! callback to be called at output of flow control */ int (*out_cb)(struct bssgp_flow_control *fc, struct msgb *msg, uint32_t llc_pdu_len, void *priv); }; #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; struct bssgp_flow_control fc; uint32_t bmax_default_ms; uint32_t r_default_ms; /* 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 #include /* 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; struct bssgp_flow_control *fc; 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); /* input function of the flow control implementation, called first * for the MM flow control, and then as the MM flow control output * callback in order to perform BVC flow control */ int bssgp_fc_in(struct bssgp_flow_control *fc, struct msgb *msg, uint32_t llc_pdu_len, void *priv); /* Initialize the Flow Control parameters for a new MS according to * default values for the BVC specified by BVCI and NSEI */ int bssgp_fc_ms_init(struct bssgp_flow_control *fc_ms, uint16_t bvci, uint16_t nsei); /* 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 */