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