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#pragma once
/* Per-MS specific state, closely attached to the L1CTL user progran */
#include <virtphy/virtual_um.h>
#include <virtphy/l1ctl_sock.h>
#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/core/timer.h>
#define L1S_NUM_NEIGH_CELL 6
#define A5_KEY_LEN 8
enum ms_state {
MS_STATE_IDLE_SEARCHING = 0,
MS_STATE_IDLE_SYNCING,
MS_STATE_IDLE_CAMPING,
MS_STATE_DEDICATED,
MS_STATE_TBF
};
/* structure representing L1 sync information about a cell */
struct l1_cell_info {
/* on which ARFCN (+band) is the cell? */
uint16_t arfcn;
/* what's the BSIC of the cell (from SCH burst decoding) */
uint8_t bsic;
/* Combined or non-combined CCCH */
uint8_t ccch_mode; /* enum ccch_mode */
/* what's the delta of the cells current GSM frame number
* compared to our current local frame number */
int32_t fn_offset;
/* how much does the TPU need adjustment (delta) to synchronize
* with the cells burst */
uint32_t time_alignment;
};
struct crypto_info_ms {
/* key is expected in the same format as in RSL
* Encryption information IE. */
uint8_t key[A5_KEY_LEN];
uint8_t algo;
};
struct l1_state_ms {
struct gsm_time downlink_time; /* current GSM time received on downlink */
struct gsm_time current_time; /* GSM time used internally for scheduling */
struct {
uint32_t last_exec_fn;
struct llist_head mframe_items;
} sched;
enum ms_state state;
/* the cell on which we are camping right now */
struct l1_cell_info serving_cell;
/* neighbor cell sync info */
struct l1_cell_info neigh_cell[L1S_NUM_NEIGH_CELL];
struct crypto_info_ms crypto_inf;
/* TCH info */
uint8_t tch_mode; // see enum gsm48_chan_mode in gsm_04_08.h
uint8_t tch_sync; // needed for audio synchronization
uint8_t audio_mode; // see l1ctl_proto.h, e.g. AUDIO_TX_MICROPHONE
/* dedicated channel info */
struct {
uint8_t chan_type; // like rsl chantype 08.58 -> Chapter 9.3.1 */
uint8_t tn; // timeslot number 1-7
uint8_t subslot; // subslot of the dedicated channel, SDCCH/4:[0-3], SDCCH/8:[0-7]
uint8_t scn; // single-hop cellular network? (unused in virtual um)
uint8_t tsc; // training sequence code (unused in virtual um)
uint8_t h; // hopping enabled flag (unused in virtual um)
} dedicated;
struct {
struct {
uint8_t usf[8];
struct llist_head tx_queue;
} ul;
struct {
uint8_t tfi[8];
} dl;
} tbf;
/* fbsb state */
struct {
uint32_t arfcn;
} fbsb;
/* power management state */
struct {
uint32_t timeout_us;
uint32_t timeout_s;
struct {
int16_t arfcn_sig_lev_dbm[1024];
uint8_t arfcn_sig_lev_red_dbm[1024];
struct osmo_timer_list arfcn_sig_lev_timers[1024];
} meas;
} pm;
};
struct l1_model_ms {
uint32_t nr;
/* pointer to the L1CTL socket client associated with this specific MS */
struct l1ctl_sock_client *lsc;
/* pointer to the (shared) GSMTAP/VirtUM socket to talk to BTS(s) */
struct virt_um_inst *vui;
/* actual per-MS state */
struct l1_state_ms state;
};
struct l1_model_ms *l1_model_ms_init(void *ctx, struct l1ctl_sock_client *lsc, struct virt_um_inst *vui);
void l1_model_ms_destroy(struct l1_model_ms *model);
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