| #pragma once |
| |
| #include <stdint.h> |
| #include <osmocom/core/timer.h> |
| #include <osmocom/core/linuxlist.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 */ |
| |
| /*! \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 (octets) */ |
| uint32_t bucket_leak_rate; /*!< leak rate of the bucket (octets/sec) */ |
| |
| 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 (mgs) */ |
| uint32_t queue_depth; /*!< current length of queue (msgs) */ |
| 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; |
| /*! default maximum size of per-MS bucket in octets */ |
| uint32_t bmax_default_ms; |
| /*! default bucket leak rate of per-MS bucket in octests/s */ |
| 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 <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; |
| 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); |
| |
| void bssgp_fc_init(struct bssgp_flow_control *fc, |
| uint32_t bucket_size_max, uint32_t bucket_leak_rate, |
| uint32_t max_queue_depth, |
| int (*out_cb)(struct bssgp_flow_control *fc, struct msgb *msg, |
| uint32_t llc_pdu_len, void *priv)); |
| |
| /* 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, uint32_t max_queue_depth); |
| |
| /* 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); |