| /* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org> |
| * |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <ctype.h> |
| |
| #include <netinet/in.h> |
| |
| #include <osmocom/core/linuxlist.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/gsm/gsm_utils.h> |
| #include <osmocom/gsm/abis_nm.h> |
| #include <osmocom/core/statistics.h> |
| |
| #include <openbsc/gsm_data.h> |
| |
| void gsm_abis_mo_reset(struct gsm_abis_mo *mo) |
| { |
| mo->nm_state.operational = NM_OPSTATE_NULL; |
| mo->nm_state.availability = NM_AVSTATE_POWER_OFF; |
| } |
| |
| static void gsm_mo_init(struct gsm_abis_mo *mo, struct gsm_bts *bts, |
| uint8_t obj_class, uint8_t p1, uint8_t p2, uint8_t p3) |
| { |
| mo->bts = bts; |
| mo->obj_class = obj_class; |
| mo->obj_inst.bts_nr = p1; |
| mo->obj_inst.trx_nr = p2; |
| mo->obj_inst.ts_nr = p3; |
| gsm_abis_mo_reset(mo); |
| } |
| |
| const struct value_string gsm_pchant_names[13] = { |
| { GSM_PCHAN_NONE, "NONE" }, |
| { GSM_PCHAN_CCCH, "CCCH" }, |
| { GSM_PCHAN_CCCH_SDCCH4,"CCCH+SDCCH4" }, |
| { GSM_PCHAN_TCH_F, "TCH/F" }, |
| { GSM_PCHAN_TCH_H, "TCH/H" }, |
| { GSM_PCHAN_SDCCH8_SACCH8C, "SDCCH8" }, |
| { GSM_PCHAN_PDCH, "PDCH" }, |
| { GSM_PCHAN_TCH_F_PDCH, "TCH/F_PDCH" }, |
| { GSM_PCHAN_UNKNOWN, "UNKNOWN" }, |
| { GSM_PCHAN_CCCH_SDCCH4_CBCH, "CCCH+SDCCH4+CBCH" }, |
| { GSM_PCHAN_SDCCH8_SACCH8C_CBCH, "SDCCH8+CBCH" }, |
| { GSM_PCHAN_TCH_F_TCH_H_PDCH, "TCH/F_TCH/H_PDCH" }, |
| { 0, NULL } |
| }; |
| |
| const struct value_string gsm_pchant_descs[13] = { |
| { GSM_PCHAN_NONE, "Physical Channel not configured" }, |
| { GSM_PCHAN_CCCH, "FCCH + SCH + BCCH + CCCH (Comb. IV)" }, |
| { GSM_PCHAN_CCCH_SDCCH4, |
| "FCCH + SCH + BCCH + CCCH + 4 SDCCH + 2 SACCH (Comb. V)" }, |
| { GSM_PCHAN_TCH_F, "TCH/F + FACCH/F + SACCH (Comb. I)" }, |
| { GSM_PCHAN_TCH_H, "2 TCH/H + 2 FACCH/H + 2 SACCH (Comb. II)" }, |
| { GSM_PCHAN_SDCCH8_SACCH8C, "8 SDCCH + 4 SACCH (Comb. VII)" }, |
| { GSM_PCHAN_PDCH, "Packet Data Channel for GPRS/EDGE" }, |
| { GSM_PCHAN_TCH_F_PDCH, "Dynamic TCH/F or GPRS PDCH" }, |
| { GSM_PCHAN_UNKNOWN, "Unknown / Unsupported channel combination" }, |
| { GSM_PCHAN_CCCH_SDCCH4_CBCH, "FCCH + SCH + BCCH + CCCH + CBCH + 3 SDCCH + 2 SACCH (Comb. V)" }, |
| { GSM_PCHAN_SDCCH8_SACCH8C_CBCH, "7 SDCCH + 4 SACCH + CBCH (Comb. VII)" }, |
| { GSM_PCHAN_TCH_F_TCH_H_PDCH, "Dynamic TCH/F or TCH/H or GPRS PDCH" }, |
| { 0, NULL } |
| }; |
| |
| const char *gsm_pchan_name(enum gsm_phys_chan_config c) |
| { |
| return get_value_string(gsm_pchant_names, c); |
| } |
| |
| enum gsm_phys_chan_config gsm_pchan_parse(const char *name) |
| { |
| return get_string_value(gsm_pchant_names, name); |
| } |
| |
| /* TODO: move to libosmocore, next to gsm_chan_t_names? */ |
| const char *gsm_lchant_name(enum gsm_chan_t c) |
| { |
| return get_value_string(gsm_chan_t_names, c); |
| } |
| |
| static const struct value_string lchan_s_names[] = { |
| { LCHAN_S_NONE, "NONE" }, |
| { LCHAN_S_ACT_REQ, "ACTIVATION REQUESTED" }, |
| { LCHAN_S_ACTIVE, "ACTIVE" }, |
| { LCHAN_S_INACTIVE, "INACTIVE" }, |
| { LCHAN_S_REL_REQ, "RELEASE REQUESTED" }, |
| { LCHAN_S_REL_ERR, "RELEASE DUE ERROR" }, |
| { LCHAN_S_BROKEN, "BROKEN UNUSABLE" }, |
| { 0, NULL } |
| }; |
| |
| const char *gsm_lchans_name(enum gsm_lchan_state s) |
| { |
| return get_value_string(lchan_s_names, s); |
| } |
| |
| static const struct value_string chreq_names[] = { |
| { GSM_CHREQ_REASON_EMERG, "EMERGENCY" }, |
| { GSM_CHREQ_REASON_PAG, "PAGING" }, |
| { GSM_CHREQ_REASON_CALL, "CALL" }, |
| { GSM_CHREQ_REASON_LOCATION_UPD,"LOCATION_UPDATE" }, |
| { GSM_CHREQ_REASON_OTHER, "OTHER" }, |
| { 0, NULL } |
| }; |
| |
| const char *gsm_chreq_name(enum gsm_chreq_reason_t c) |
| { |
| return get_value_string(chreq_names, c); |
| } |
| |
| struct gsm_bts *gsm_bts_num(struct gsm_network *net, int num) |
| { |
| struct gsm_bts *bts; |
| |
| if (num >= net->num_bts) |
| return NULL; |
| |
| llist_for_each_entry(bts, &net->bts_list, list) { |
| if (bts->nr == num) |
| return bts; |
| } |
| |
| return NULL; |
| } |
| |
| struct gsm_bts_trx *gsm_bts_trx_alloc(struct gsm_bts *bts) |
| { |
| struct gsm_bts_trx *trx = talloc_zero(bts, struct gsm_bts_trx); |
| int k; |
| |
| if (!trx) |
| return NULL; |
| |
| trx->bts = bts; |
| trx->nr = bts->num_trx++; |
| trx->mo.nm_state.administrative = NM_STATE_UNLOCKED; |
| |
| gsm_mo_init(&trx->mo, bts, NM_OC_RADIO_CARRIER, |
| bts->nr, trx->nr, 0xff); |
| gsm_mo_init(&trx->bb_transc.mo, bts, NM_OC_BASEB_TRANSC, |
| bts->nr, trx->nr, 0xff); |
| |
| for (k = 0; k < TRX_NR_TS; k++) { |
| struct gsm_bts_trx_ts *ts = &trx->ts[k]; |
| int l; |
| |
| ts->trx = trx; |
| ts->nr = k; |
| ts->pchan = GSM_PCHAN_NONE; |
| ts->dyn.pchan_is = GSM_PCHAN_NONE; |
| ts->dyn.pchan_want = GSM_PCHAN_NONE; |
| ts->tsc = -1; |
| |
| gsm_mo_init(&ts->mo, bts, NM_OC_CHANNEL, |
| bts->nr, trx->nr, ts->nr); |
| |
| ts->hopping.arfcns.data_len = sizeof(ts->hopping.arfcns_data); |
| ts->hopping.arfcns.data = ts->hopping.arfcns_data; |
| ts->hopping.ma.data_len = sizeof(ts->hopping.ma_data); |
| ts->hopping.ma.data = ts->hopping.ma_data; |
| |
| for (l = 0; l < TS_MAX_LCHAN; l++) { |
| struct gsm_lchan *lchan; |
| char *name; |
| lchan = &ts->lchan[l]; |
| |
| lchan->ts = ts; |
| lchan->nr = l; |
| lchan->type = GSM_LCHAN_NONE; |
| |
| name = gsm_lchan_name_compute(lchan); |
| lchan->name = talloc_strdup(trx, name); |
| #ifndef ROLE_BSC |
| INIT_LLIST_HEAD(&lchan->sapi_cmds); |
| #endif |
| } |
| } |
| |
| if (trx->nr != 0) |
| trx->nominal_power = bts->c0->nominal_power; |
| |
| llist_add_tail(&trx->list, &bts->trx_list); |
| |
| return trx; |
| } |
| |
| |
| static const uint8_t bts_nse_timer_default[] = { 3, 3, 3, 3, 30, 3, 10 }; |
| static const uint8_t bts_cell_timer_default[] = |
| { 3, 3, 3, 3, 3, 10, 3, 10, 3, 10, 3 }; |
| static const struct gprs_rlc_cfg rlc_cfg_default = { |
| .parameter = { |
| [RLC_T3142] = 20, |
| [RLC_T3169] = 5, |
| [RLC_T3191] = 5, |
| [RLC_T3193] = 160, /* 10ms */ |
| [RLC_T3195] = 5, |
| [RLC_N3101] = 10, |
| [RLC_N3103] = 4, |
| [RLC_N3105] = 8, |
| [CV_COUNTDOWN] = 15, |
| [T_DL_TBF_EXT] = 250 * 10, /* ms */ |
| [T_UL_TBF_EXT] = 250 * 10, /* ms */ |
| }, |
| .paging = { |
| .repeat_time = 5 * 50, /* ms */ |
| .repeat_count = 3, |
| }, |
| .cs_mask = 0x1fff, |
| .initial_cs = 2, |
| .initial_mcs = 6, |
| }; |
| |
| struct gsm_bts *gsm_bts_alloc(void *ctx) |
| { |
| struct gsm_bts *bts = talloc_zero(ctx, struct gsm_bts); |
| int i; |
| |
| if (!bts) |
| return NULL; |
| |
| bts->num_trx = 0; |
| INIT_LLIST_HEAD(&bts->trx_list); |
| bts->ms_max_power = 15; /* dBm */ |
| |
| gsm_mo_init(&bts->mo, bts, NM_OC_BTS, |
| bts->nr, 0xff, 0xff); |
| gsm_mo_init(&bts->site_mgr.mo, bts, NM_OC_SITE_MANAGER, |
| 0xff, 0xff, 0xff); |
| |
| for (i = 0; i < ARRAY_SIZE(bts->gprs.nsvc); i++) { |
| bts->gprs.nsvc[i].bts = bts; |
| bts->gprs.nsvc[i].id = i; |
| gsm_mo_init(&bts->gprs.nsvc[i].mo, bts, NM_OC_GPRS_NSVC, |
| bts->nr, i, 0xff); |
| } |
| memcpy(&bts->gprs.nse.timer, bts_nse_timer_default, |
| sizeof(bts->gprs.nse.timer)); |
| gsm_mo_init(&bts->gprs.nse.mo, bts, NM_OC_GPRS_NSE, |
| bts->nr, 0xff, 0xff); |
| memcpy(&bts->gprs.cell.timer, bts_cell_timer_default, |
| sizeof(bts->gprs.cell.timer)); |
| gsm_mo_init(&bts->gprs.cell.mo, bts, NM_OC_GPRS_CELL, |
| bts->nr, 0xff, 0xff); |
| memcpy(&bts->gprs.cell.rlc_cfg, &rlc_cfg_default, |
| sizeof(bts->gprs.cell.rlc_cfg)); |
| |
| /* create our primary TRX */ |
| bts->c0 = gsm_bts_trx_alloc(bts); |
| if (!bts->c0) { |
| talloc_free(bts); |
| return NULL; |
| } |
| bts->c0->ts[0].pchan = GSM_PCHAN_CCCH_SDCCH4; |
| |
| bts->rach_b_thresh = -1; |
| bts->rach_ldavg_slots = -1; |
| bts->paging.free_chans_need = -1; |
| |
| /* si handling */ |
| bts->bcch_change_mark = 1; |
| |
| return bts; |
| } |
| |
| /* reset the state of all MO in the BTS */ |
| void gsm_bts_mo_reset(struct gsm_bts *bts) |
| { |
| struct gsm_bts_trx *trx; |
| unsigned int i; |
| |
| gsm_abis_mo_reset(&bts->mo); |
| gsm_abis_mo_reset(&bts->site_mgr.mo); |
| for (i = 0; i < ARRAY_SIZE(bts->gprs.nsvc); i++) |
| gsm_abis_mo_reset(&bts->gprs.nsvc[i].mo); |
| gsm_abis_mo_reset(&bts->gprs.nse.mo); |
| gsm_abis_mo_reset(&bts->gprs.cell.mo); |
| |
| llist_for_each_entry(trx, &bts->trx_list, list) { |
| gsm_abis_mo_reset(&trx->mo); |
| gsm_abis_mo_reset(&trx->bb_transc.mo); |
| |
| for (i = 0; i < ARRAY_SIZE(trx->ts); i++) { |
| struct gsm_bts_trx_ts *ts = &trx->ts[i]; |
| gsm_abis_mo_reset(&ts->mo); |
| } |
| } |
| } |
| |
| struct gsm_bts_trx *gsm_bts_trx_num(const struct gsm_bts *bts, int num) |
| { |
| struct gsm_bts_trx *trx; |
| |
| if (num >= bts->num_trx) |
| return NULL; |
| |
| llist_for_each_entry(trx, &bts->trx_list, list) { |
| if (trx->nr == num) |
| return trx; |
| } |
| |
| return NULL; |
| } |
| |
| static char ts2str[255]; |
| |
| char *gsm_trx_name(const struct gsm_bts_trx *trx) |
| { |
| snprintf(ts2str, sizeof(ts2str), "(bts=%d,trx=%d)", |
| trx->bts->nr, trx->nr); |
| |
| return ts2str; |
| } |
| |
| |
| char *gsm_ts_name(const struct gsm_bts_trx_ts *ts) |
| { |
| snprintf(ts2str, sizeof(ts2str), "(bts=%d,trx=%d,ts=%d)", |
| ts->trx->bts->nr, ts->trx->nr, ts->nr); |
| |
| return ts2str; |
| } |
| |
| /*! Log timeslot number with full pchan information */ |
| char *gsm_ts_and_pchan_name(const struct gsm_bts_trx_ts *ts) |
| { |
| switch (ts->pchan) { |
| case GSM_PCHAN_TCH_F_TCH_H_PDCH: |
| if (ts->dyn.pchan_is == ts->dyn.pchan_want) |
| snprintf(ts2str, sizeof(ts2str), |
| "(bts=%d,trx=%d,ts=%d,pchan=%s as %s)", |
| ts->trx->bts->nr, ts->trx->nr, ts->nr, |
| gsm_pchan_name(ts->pchan), |
| gsm_pchan_name(ts->dyn.pchan_is)); |
| else |
| snprintf(ts2str, sizeof(ts2str), |
| "(bts=%d,trx=%d,ts=%d,pchan=%s" |
| " switching %s -> %s)", |
| ts->trx->bts->nr, ts->trx->nr, ts->nr, |
| gsm_pchan_name(ts->pchan), |
| gsm_pchan_name(ts->dyn.pchan_is), |
| gsm_pchan_name(ts->dyn.pchan_want)); |
| break; |
| case GSM_PCHAN_TCH_F_PDCH: |
| if ((ts->flags & TS_F_PDCH_PENDING_MASK) == 0) |
| snprintf(ts2str, sizeof(ts2str), |
| "(bts=%d,trx=%d,ts=%d,pchan=%s as %s)", |
| ts->trx->bts->nr, ts->trx->nr, ts->nr, |
| gsm_pchan_name(ts->pchan), |
| (ts->flags & TS_F_PDCH_ACTIVE)? "PDCH" |
| : "TCH/F"); |
| else |
| snprintf(ts2str, sizeof(ts2str), |
| "(bts=%d,trx=%d,ts=%d,pchan=%s" |
| " switching %s -> %s)", |
| ts->trx->bts->nr, ts->trx->nr, ts->nr, |
| gsm_pchan_name(ts->pchan), |
| (ts->flags & TS_F_PDCH_ACTIVE)? "PDCH" |
| : "TCH/F", |
| (ts->flags & TS_F_PDCH_ACT_PENDING)? "PDCH" |
| : "TCH/F"); |
| break; |
| default: |
| snprintf(ts2str, sizeof(ts2str), "(bts=%d,trx=%d,ts=%d,pchan=%s)", |
| ts->trx->bts->nr, ts->trx->nr, ts->nr, |
| gsm_pchan_name(ts->pchan)); |
| break; |
| } |
| |
| return ts2str; |
| } |
| |
| char *gsm_lchan_name_compute(const struct gsm_lchan *lchan) |
| { |
| struct gsm_bts_trx_ts *ts = lchan->ts; |
| |
| snprintf(ts2str, sizeof(ts2str), "(bts=%d,trx=%d,ts=%d,ss=%d)", |
| ts->trx->bts->nr, ts->trx->nr, ts->nr, lchan->nr); |
| |
| return ts2str; |
| } |
| |
| /* obtain the MO structure for a given object instance */ |
| struct gsm_abis_mo * |
| gsm_objclass2mo(struct gsm_bts *bts, uint8_t obj_class, |
| const struct abis_om_obj_inst *obj_inst) |
| { |
| struct gsm_bts_trx *trx; |
| struct gsm_abis_mo *mo = NULL; |
| |
| switch (obj_class) { |
| case NM_OC_BTS: |
| mo = &bts->mo; |
| break; |
| case NM_OC_RADIO_CARRIER: |
| if (obj_inst->trx_nr >= bts->num_trx) { |
| return NULL; |
| } |
| trx = gsm_bts_trx_num(bts, obj_inst->trx_nr); |
| mo = &trx->mo; |
| break; |
| case NM_OC_BASEB_TRANSC: |
| if (obj_inst->trx_nr >= bts->num_trx) { |
| return NULL; |
| } |
| trx = gsm_bts_trx_num(bts, obj_inst->trx_nr); |
| mo = &trx->bb_transc.mo; |
| break; |
| case NM_OC_CHANNEL: |
| if (obj_inst->trx_nr >= bts->num_trx) { |
| return NULL; |
| } |
| trx = gsm_bts_trx_num(bts, obj_inst->trx_nr); |
| if (obj_inst->ts_nr >= TRX_NR_TS) |
| return NULL; |
| mo = &trx->ts[obj_inst->ts_nr].mo; |
| break; |
| case NM_OC_SITE_MANAGER: |
| mo = &bts->site_mgr.mo; |
| break; |
| case NM_OC_BS11: |
| switch (obj_inst->bts_nr) { |
| case BS11_OBJ_CCLK: |
| mo = &bts->bs11.cclk.mo; |
| break; |
| case BS11_OBJ_BBSIG: |
| if (obj_inst->ts_nr > bts->num_trx) |
| return NULL; |
| trx = gsm_bts_trx_num(bts, obj_inst->trx_nr); |
| mo = &trx->bs11.bbsig.mo; |
| break; |
| case BS11_OBJ_PA: |
| if (obj_inst->ts_nr > bts->num_trx) |
| return NULL; |
| trx = gsm_bts_trx_num(bts, obj_inst->trx_nr); |
| mo = &trx->bs11.pa.mo; |
| break; |
| default: |
| return NULL; |
| } |
| break; |
| case NM_OC_BS11_RACK: |
| mo = &bts->bs11.rack.mo; |
| break; |
| case NM_OC_BS11_ENVABTSE: |
| if (obj_inst->trx_nr >= ARRAY_SIZE(bts->bs11.envabtse)) |
| return NULL; |
| mo = &bts->bs11.envabtse[obj_inst->trx_nr].mo; |
| break; |
| case NM_OC_GPRS_NSE: |
| mo = &bts->gprs.nse.mo; |
| break; |
| case NM_OC_GPRS_CELL: |
| mo = &bts->gprs.cell.mo; |
| break; |
| case NM_OC_GPRS_NSVC: |
| if (obj_inst->trx_nr >= ARRAY_SIZE(bts->gprs.nsvc)) |
| return NULL; |
| mo = &bts->gprs.nsvc[obj_inst->trx_nr].mo; |
| break; |
| } |
| return mo; |
| } |
| |
| /* obtain the gsm_nm_state data structure for a given object instance */ |
| struct gsm_nm_state * |
| gsm_objclass2nmstate(struct gsm_bts *bts, uint8_t obj_class, |
| const struct abis_om_obj_inst *obj_inst) |
| { |
| struct gsm_abis_mo *mo; |
| |
| mo = gsm_objclass2mo(bts, obj_class, obj_inst); |
| if (!mo) |
| return NULL; |
| |
| return &mo->nm_state; |
| } |
| |
| /* obtain the in-memory data structure of a given object instance */ |
| void * |
| gsm_objclass2obj(struct gsm_bts *bts, uint8_t obj_class, |
| const struct abis_om_obj_inst *obj_inst) |
| { |
| struct gsm_bts_trx *trx; |
| void *obj = NULL; |
| |
| switch (obj_class) { |
| case NM_OC_BTS: |
| obj = bts; |
| break; |
| case NM_OC_RADIO_CARRIER: |
| if (obj_inst->trx_nr >= bts->num_trx) { |
| return NULL; |
| } |
| trx = gsm_bts_trx_num(bts, obj_inst->trx_nr); |
| obj = trx; |
| break; |
| case NM_OC_BASEB_TRANSC: |
| if (obj_inst->trx_nr >= bts->num_trx) { |
| return NULL; |
| } |
| trx = gsm_bts_trx_num(bts, obj_inst->trx_nr); |
| obj = &trx->bb_transc; |
| break; |
| case NM_OC_CHANNEL: |
| if (obj_inst->trx_nr >= bts->num_trx) { |
| return NULL; |
| } |
| trx = gsm_bts_trx_num(bts, obj_inst->trx_nr); |
| if (obj_inst->ts_nr >= TRX_NR_TS) |
| return NULL; |
| obj = &trx->ts[obj_inst->ts_nr]; |
| break; |
| case NM_OC_SITE_MANAGER: |
| obj = &bts->site_mgr; |
| break; |
| case NM_OC_GPRS_NSE: |
| obj = &bts->gprs.nse; |
| break; |
| case NM_OC_GPRS_CELL: |
| obj = &bts->gprs.cell; |
| break; |
| case NM_OC_GPRS_NSVC: |
| if (obj_inst->trx_nr >= ARRAY_SIZE(bts->gprs.nsvc)) |
| return NULL; |
| obj = &bts->gprs.nsvc[obj_inst->trx_nr]; |
| break; |
| } |
| return obj; |
| } |
| |
| /* See Table 10.5.25 of GSM04.08 */ |
| uint8_t gsm_pchan2chan_nr(enum gsm_phys_chan_config pchan, |
| uint8_t ts_nr, uint8_t lchan_nr) |
| { |
| uint8_t cbits, chan_nr; |
| |
| switch (pchan) { |
| case GSM_PCHAN_TCH_F: |
| case GSM_PCHAN_PDCH: |
| case GSM_PCHAN_TCH_F_PDCH: |
| OSMO_ASSERT(lchan_nr == 0); |
| cbits = 0x01; |
| break; |
| case GSM_PCHAN_TCH_H: |
| OSMO_ASSERT(lchan_nr < 2); |
| cbits = 0x02; |
| cbits += lchan_nr; |
| break; |
| case GSM_PCHAN_CCCH_SDCCH4: |
| case GSM_PCHAN_CCCH_SDCCH4_CBCH: |
| /* |
| * As a special hack for BCCH, lchan_nr == 4 may be passed |
| * here. This should never be sent in an RSL message, so just |
| * return 0. See osmo-bts-xxx/oml.c:opstart_compl(). |
| */ |
| if (lchan_nr == 4) { |
| chan_nr = 0; |
| break; |
| } |
| OSMO_ASSERT(lchan_nr < 4); |
| cbits = 0x04; |
| cbits += lchan_nr; |
| break; |
| case GSM_PCHAN_SDCCH8_SACCH8C: |
| case GSM_PCHAN_SDCCH8_SACCH8C_CBCH: |
| OSMO_ASSERT(lchan_nr < 8); |
| cbits = 0x08; |
| cbits += lchan_nr; |
| break; |
| default: |
| case GSM_PCHAN_CCCH: |
| OSMO_ASSERT(lchan_nr == 0); |
| cbits = 0x10; |
| break; |
| } |
| |
| chan_nr = (cbits << 3) | (ts_nr & 0x7); |
| |
| return chan_nr; |
| } |
| |
| uint8_t gsm_lchan2chan_nr(const struct gsm_lchan *lchan) |
| { |
| return gsm_pchan2chan_nr(lchan->ts->pchan, lchan->ts->nr, lchan->nr); |
| } |
| |
| uint8_t gsm_lchan_as_pchan2chan_nr(const struct gsm_lchan *lchan, |
| enum gsm_phys_chan_config as_pchan) |
| { |
| return gsm_pchan2chan_nr(as_pchan, lchan->ts->nr, lchan->nr); |
| } |
| |
| /* return the gsm_lchan for the CBCH (if it exists at all) */ |
| struct gsm_lchan *gsm_bts_get_cbch(struct gsm_bts *bts) |
| { |
| struct gsm_lchan *lchan = NULL; |
| struct gsm_bts_trx *trx = bts->c0; |
| |
| if (trx->ts[0].pchan == GSM_PCHAN_CCCH_SDCCH4_CBCH) |
| lchan = &trx->ts[0].lchan[2]; |
| else { |
| int i; |
| for (i = 0; i < 8; i++) { |
| if (trx->ts[i].pchan == GSM_PCHAN_SDCCH8_SACCH8C_CBCH) { |
| lchan = &trx->ts[i].lchan[2]; |
| break; |
| } |
| } |
| } |
| |
| return lchan; |
| } |
| |
| /* determine logical channel based on TRX and channel number IE */ |
| struct gsm_lchan *rsl_lchan_lookup(struct gsm_bts_trx *trx, uint8_t chan_nr, |
| int *rc) |
| { |
| uint8_t ts_nr = chan_nr & 0x07; |
| uint8_t cbits = chan_nr >> 3; |
| uint8_t lch_idx; |
| struct gsm_bts_trx_ts *ts = &trx->ts[ts_nr]; |
| bool ok = true; |
| |
| if (rc) |
| *rc = -EINVAL; |
| |
| if (cbits == 0x01) { |
| lch_idx = 0; /* TCH/F */ |
| if (ts->pchan != GSM_PCHAN_TCH_F && |
| ts->pchan != GSM_PCHAN_PDCH && |
| ts->pchan != GSM_PCHAN_TCH_F_PDCH) |
| ok = false; |
| } else if ((cbits & 0x1e) == 0x02) { |
| lch_idx = cbits & 0x1; /* TCH/H */ |
| if (ts->pchan != GSM_PCHAN_TCH_H) |
| ok = false; |
| } else if ((cbits & 0x1c) == 0x04) { |
| lch_idx = cbits & 0x3; /* SDCCH/4 */ |
| if (ts->pchan != GSM_PCHAN_CCCH_SDCCH4 && |
| ts->pchan != GSM_PCHAN_CCCH_SDCCH4_CBCH) |
| ok = false; |
| } else if ((cbits & 0x18) == 0x08) { |
| lch_idx = cbits & 0x7; /* SDCCH/8 */ |
| if (ts->pchan != GSM_PCHAN_SDCCH8_SACCH8C && |
| ts->pchan != GSM_PCHAN_SDCCH8_SACCH8C_CBCH) |
| ok = false; |
| } else if (cbits == 0x10 || cbits == 0x11 || cbits == 0x12) { |
| lch_idx = 0; |
| if (ts->pchan != GSM_PCHAN_CCCH && |
| ts->pchan != GSM_PCHAN_CCCH_SDCCH4 && |
| ts->pchan != GSM_PCHAN_CCCH_SDCCH4_CBCH) |
| ok = false; |
| /* FIXME: we should not return first sdcch4 !!! */ |
| } else |
| return NULL; |
| |
| if (rc && ok) |
| *rc = 0; |
| |
| return &ts->lchan[lch_idx]; |
| } |