| #ifndef _GPRS_BSSGP_H |
| #define _GPRS_BSSGP_H |
| |
| #include <stdint.h> |
| |
| /*! \brief Fixed BVCI definitions (Section 5.4.1) */ |
| #define BVCI_SIGNALLING 0x0000 |
| #define BVCI_PTM 0x0001 |
| |
| /*! \brief BSSGP PDU types (Section 11.3.26 / Table 11.27) */ |
| enum bssgp_pdu_type { |
| /* PDUs between RL and BSSGP SAPs */ |
| BSSGP_PDUT_DL_UNITDATA = 0x00, |
| BSSGP_PDUT_UL_UNITDATA = 0x01, |
| BSSGP_PDUT_RA_CAPABILITY = 0x02, |
| BSSGP_PDUT_PTM_UNITDATA = 0x03, |
| /* PDUs between GMM SAPs */ |
| BSSGP_PDUT_PAGING_PS = 0x06, |
| BSSGP_PDUT_PAGING_CS = 0x07, |
| BSSGP_PDUT_RA_CAPA_UDPATE = 0x08, |
| BSSGP_PDUT_RA_CAPA_UPDATE_ACK = 0x09, |
| BSSGP_PDUT_RADIO_STATUS = 0x0a, |
| BSSGP_PDUT_SUSPEND = 0x0b, |
| BSSGP_PDUT_SUSPEND_ACK = 0x0c, |
| BSSGP_PDUT_SUSPEND_NACK = 0x0d, |
| BSSGP_PDUT_RESUME = 0x0e, |
| BSSGP_PDUT_RESUME_ACK = 0x0f, |
| BSSGP_PDUT_RESUME_NACK = 0x10, |
| /* PDus between NM SAPs */ |
| BSSGP_PDUT_BVC_BLOCK = 0x20, |
| BSSGP_PDUT_BVC_BLOCK_ACK = 0x21, |
| BSSGP_PDUT_BVC_RESET = 0x22, |
| BSSGP_PDUT_BVC_RESET_ACK = 0x23, |
| BSSGP_PDUT_BVC_UNBLOCK = 0x24, |
| BSSGP_PDUT_BVC_UNBLOCK_ACK = 0x25, |
| BSSGP_PDUT_FLOW_CONTROL_BVC = 0x26, |
| BSSGP_PDUT_FLOW_CONTROL_BVC_ACK = 0x27, |
| BSSGP_PDUT_FLOW_CONTROL_MS = 0x28, |
| BSSGP_PDUT_FLOW_CONTROL_MS_ACK = 0x29, |
| BSSGP_PDUT_FLUSH_LL = 0x2a, |
| BSSGP_PDUT_FLUSH_LL_ACK = 0x2b, |
| BSSGP_PDUT_LLC_DISCARD = 0x2c, |
| BSSGP_PDUT_SGSN_INVOKE_TRACE = 0x40, |
| BSSGP_PDUT_STATUS = 0x41, |
| /* PDUs between PFM SAP's */ |
| BSSGP_PDUT_DOWNLOAD_BSS_PFC = 0x50, |
| BSSGP_PDUT_CREATE_BSS_PFC = 0x51, |
| BSSGP_PDUT_CREATE_BSS_PFC_ACK = 0x52, |
| BSSGP_PDUT_CREATE_BSS_PFC_NACK = 0x53, |
| BSSGP_PDUT_MODIFY_BSS_PFC = 0x54, |
| BSSGP_PDUT_MODIFY_BSS_PFC_ACK = 0x55, |
| BSSGP_PDUT_DELETE_BSS_PFC = 0x56, |
| BSSGP_PDUT_DELETE_BSS_PFC_ACK = 0x57, |
| }; |
| |
| /*! \brief BSSGP User-Data header (Section 10.2.1 and 10.2.2) */ |
| struct bssgp_ud_hdr { |
| uint8_t pdu_type; /*!< BSSGP PDU type */ |
| uint32_t tlli; /*!< Temporary Link-Local Identifier */ |
| uint8_t qos_profile[3]; /*!< QoS profile */ |
| uint8_t data[0]; /* optional/conditional IEs as TLVs */ |
| } __attribute__((packed)); |
| |
| /*! \brief BSSGP normal header */ |
| struct bssgp_normal_hdr { |
| uint8_t pdu_type; /*!< BSSGP PDU type */ |
| uint8_t data[0]; /*!< optional/conditional IEs as TLVs */ |
| }; |
| |
| /*! \brief BSSGP Information Element Identifiers */ |
| enum bssgp_iei_type { |
| BSSGP_IE_ALIGNMENT = 0x00, |
| BSSGP_IE_BMAX_DEFAULT_MS = 0x01, |
| BSSGP_IE_BSS_AREA_ID = 0x02, |
| BSSGP_IE_BUCKET_LEAK_RATE = 0x03, |
| BSSGP_IE_BVCI = 0x04, |
| BSSGP_IE_BVC_BUCKET_SIZE = 0x05, |
| BSSGP_IE_BVC_MEASUREMENT = 0x06, |
| BSSGP_IE_CAUSE = 0x07, |
| BSSGP_IE_CELL_ID = 0x08, |
| BSSGP_IE_CHAN_NEEDED = 0x09, |
| BSSGP_IE_DRX_PARAMS = 0x0a, |
| BSSGP_IE_EMLPP_PRIO = 0x0b, |
| BSSGP_IE_FLUSH_ACTION = 0x0c, |
| BSSGP_IE_IMSI = 0x0d, |
| BSSGP_IE_LLC_PDU = 0x0e, |
| BSSGP_IE_LLC_FRAMES_DISCARDED = 0x0f, |
| BSSGP_IE_LOCATION_AREA = 0x10, |
| BSSGP_IE_MOBILE_ID = 0x11, |
| BSSGP_IE_MS_BUCKET_SIZE = 0x12, |
| BSSGP_IE_MS_RADIO_ACCESS_CAP = 0x13, |
| BSSGP_IE_OMC_ID = 0x14, |
| BSSGP_IE_PDU_IN_ERROR = 0x15, |
| BSSGP_IE_PDU_LIFETIME = 0x16, |
| BSSGP_IE_PRIORITY = 0x17, |
| BSSGP_IE_QOS_PROFILE = 0x18, |
| BSSGP_IE_RADIO_CAUSE = 0x19, |
| BSSGP_IE_RA_CAP_UPD_CAUSE = 0x1a, |
| BSSGP_IE_ROUTEING_AREA = 0x1b, |
| BSSGP_IE_R_DEFAULT_MS = 0x1c, |
| BSSGP_IE_SUSPEND_REF_NR = 0x1d, |
| BSSGP_IE_TAG = 0x1e, |
| BSSGP_IE_TLLI = 0x1f, |
| BSSGP_IE_TMSI = 0x20, |
| BSSGP_IE_TRACE_REFERENC = 0x21, |
| BSSGP_IE_TRACE_TYPE = 0x22, |
| BSSGP_IE_TRANSACTION_ID = 0x23, |
| BSSGP_IE_TRIGGER_ID = 0x24, |
| BSSGP_IE_NUM_OCT_AFF = 0x25, |
| BSSGP_IE_LSA_ID_LIST = 0x26, |
| BSSGP_IE_LSA_INFORMATION = 0x27, |
| BSSGP_IE_PACKET_FLOW_ID = 0x28, |
| BSSGP_IE_PACKET_FLOW_TIMER = 0x29, |
| BSSGP_IE_AGG_BSS_QOS_PROFILE = 0x3a, |
| BSSGP_IE_FEATURE_BITMAP = 0x3b, |
| BSSGP_IE_BUCKET_FULL_RATIO = 0x3c, |
| BSSGP_IE_SERVICE_UTRAN_CCO = 0x3d, |
| }; |
| |
| /*! \brief Cause coding (Section 11.3.8 / Table 11.10) */ |
| enum gprs_bssgp_cause { |
| BSSGP_CAUSE_PROC_OVERLOAD = 0x00, |
| BSSGP_CAUSE_EQUIP_FAIL = 0x01, |
| BSSGP_CAUSE_TRASIT_NET_FAIL = 0x02, |
| BSSGP_CAUSE_CAPA_GREATER_0KPBS = 0x03, |
| BSSGP_CAUSE_UNKNOWN_MS = 0x04, |
| BSSGP_CAUSE_UNKNOWN_BVCI = 0x05, |
| BSSGP_CAUSE_CELL_TRAF_CONG = 0x06, |
| BSSGP_CAUSE_SGSN_CONG = 0x07, |
| BSSGP_CAUSE_OML_INTERV = 0x08, |
| BSSGP_CAUSE_BVCI_BLOCKED = 0x09, |
| BSSGP_CAUSE_PFC_CREATE_FAIL = 0x0a, |
| BSSGP_CAUSE_SEM_INCORR_PDU = 0x20, |
| BSSGP_CAUSE_INV_MAND_INF = 0x21, |
| BSSGP_CAUSE_MISSING_MAND_IE = 0x22, |
| BSSGP_CAUSE_MISSING_COND_IE = 0x23, |
| BSSGP_CAUSE_UNEXP_COND_IE = 0x24, |
| BSSGP_CAUSE_COND_IE_ERR = 0x25, |
| BSSGP_CAUSE_PDU_INCOMP_STATE = 0x26, |
| BSSGP_CAUSE_PROTO_ERR_UNSPEC = 0x27, |
| BSSGP_CAUSE_PDU_INCOMP_FEAT = 0x28, |
| }; |
| |
| /* Our implementation */ |
| |
| #include <osmocom/gsm/gsm48.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); |
| |
| /* 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> |
| |
| /* BSSGP-UL-UNITDATA.ind */ |
| int gprs_bssgp_rcvmsg(struct msgb *msg); |
| |
| /* BSSGP-DL-UNITDATA.req */ |
| struct sgsn_mm_ctx; |
| int gprs_bssgp_tx_dl_ud(struct msgb *msg, struct sgsn_mm_ctx *mmctx); |
| |
| 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 gprs_bssgp_tx_paging(uint16_t nsei, uint16_t ns_bvci, |
| struct bssgp_paging_info *pinfo); |
| |
| /* gprs_bssgp_vty.c */ |
| int gprs_bssgp_vty_init(void); |
| |
| #endif /* _GPRS_BSSGP_H */ |