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osmo-bsc/src/osmo-bsc/gsm_data.c

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/* (C) 2008-2018 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 <stdbool.h>
#include <inttypes.h>
#include <netinet/in.h>
#include <talloc.h>
#include <osmocom/core/linuxlist.h>
#include <osmocom/core/byteswap.h>
#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/gsm/abis_nm.h>
#include <osmocom/core/statistics.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include <osmocom/gsm/gsm48.h>
#include <osmocom/gsm/gsm0808_utils.h>
#include <osmocom/bsc/gsm_data.h>
#include <osmocom/bsc/osmo_bsc_lcls.h>
#include <osmocom/bsc/abis_rsl.h>
#include <osmocom/bsc/abis_nm.h>
#include <osmocom/bsc/handover_cfg.h>
#include <osmocom/bsc/timeslot_fsm.h>
#include <osmocom/bsc/lchan_fsm.h>
#include <osmocom/bsc/bts.h>
#include <osmocom/bsc/bsc_msc_data.h>
void *tall_bsc_ctx = NULL;
void set_ts_e1link(struct gsm_bts_trx_ts *ts, uint8_t e1_nr,
uint8_t e1_ts, uint8_t e1_ts_ss)
{
ts->e1_link.e1_nr = e1_nr;
ts->e1_link.e1_ts = e1_ts;
ts->e1_link.e1_ts_ss = e1_ts_ss;
}
/* Search for a BTS in the given Location Area; optionally start searching
* with start_bts (for continuing to search after the first result) */
struct gsm_bts *gsm_bts_by_lac(struct gsm_network *net, unsigned int lac,
struct gsm_bts *start_bts)
{
struct gsm_bts *bts;
int skip = 0;
if (start_bts)
skip = 1;
llist_for_each_entry(bts, &net->bts_list, list) {
if (skip) {
if (start_bts == bts)
skip = 0;
continue;
}
if (lac == GSM_LAC_RESERVED_ALL_BTS || bts->location_area_code == lac)
return bts;
}
return NULL;
}
static const struct value_string bts_gprs_mode_names[] = {
{ BTS_GPRS_NONE, "none" },
{ BTS_GPRS_GPRS, "gprs" },
{ BTS_GPRS_EGPRS, "egprs" },
{ 0, NULL }
};
enum bts_gprs_mode bts_gprs_mode_parse(const char *arg, int *valid)
{
int rc;
rc = get_string_value(bts_gprs_mode_names, arg);
if (valid)
*valid = rc != -EINVAL;
return rc;
}
const char *bts_gprs_mode_name(enum bts_gprs_mode mode)
{
return get_value_string(bts_gprs_mode_names, mode);
}
struct gsm_bts *gsm_bts_alloc_register(struct gsm_network *net, enum gsm_bts_type type,
uint8_t bsic)
{
struct gsm_bts_model *model = bts_model_find(type);
struct gsm_bts_sm *bts_sm;
struct gsm_bts *bts;
if (!model && type != GSM_BTS_TYPE_UNKNOWN)
return NULL;
bts_sm = gsm_bts_sm_alloc(net, net->num_bts);
if (!bts_sm)
return NULL;
bts = bts_sm->bts[0];
net->num_bts++;
bts->type = type;
gsm_set_bts_model(bts, model);
bts->bsic = bsic;
llist_add_tail(&bts->list, &net->bts_list);
return bts;
}
void gprs_ra_id_by_bts(struct gprs_ra_id *raid, struct gsm_bts *bts)
{
*raid = (struct gprs_ra_id){
.mcc = bts->network->plmn.mcc,
.mnc = bts->network->plmn.mnc,
.mnc_3_digits = bts->network->plmn.mnc_3_digits,
.lac = bts->location_area_code,
.rac = bts->gprs.rac,
};
}
void gsm48_ra_id_by_bts(struct gsm48_ra_id *buf, struct gsm_bts *bts)
{
struct gprs_ra_id raid;
gprs_ra_id_by_bts(&raid, bts);
gsm48_encode_ra(buf, &raid);
}
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;
mo->nm_state.administrative = NM_STATE_LOCKED;
}
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_chreq_descs[] = {
{ GSM_CHREQ_REASON_EMERG, "emergency call" },
{ GSM_CHREQ_REASON_PAG, "answer to paging" },
{ GSM_CHREQ_REASON_CALL, "call (re-)establishment" },
{ GSM_CHREQ_REASON_LOCATION_UPD,"Location updating" },
{ GSM_CHREQ_REASON_PDCH, "one phase packet access" },
{ GSM_CHREQ_REASON_OTHER, "other" },
{ 0, NULL }
};
const struct value_string gsm_pchant_names[] = {
{ 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, "DYNAMIC/IPACCESS" },
{ GSM_PCHAN_UNKNOWN, "UNKNOWN" },
{ GSM_PCHAN_CCCH_SDCCH4_CBCH, "CCCH+SDCCH4+CBCH" },
{ GSM_PCHAN_SDCCH8_SACCH8C_CBCH, "SDCCH8+CBCH" },
{ GSM_PCHAN_OSMO_DYN, "DYNAMIC/OSMOCOM" },
/* make get_string_value() return GSM_PCHAN_TCH_F_PDCH for both "DYNAMIC/IPACCESS" and "TCH/F_PDCH" */
{ GSM_PCHAN_TCH_F_PDCH, "TCH/F_PDCH" },
/* make get_string_value() return GSM_PCHAN_OSMO_DYN for both "DYNAMIC/OSMOCOM" and "TCH/F_TCH/H_SDCCH8_PDCH" */
{ GSM_PCHAN_OSMO_DYN, "TCH/F_TCH/H_SDCCH8_PDCH" },
/* When adding items here, you must also add matching items to gsm_pchant_descs[]! */
{ 0, NULL }
};
/* VTY command descriptions. These have to be in the same order as gsm_pchant_names[], so that the automatic VTY command
* composition in bts_trx_vty_init() works out. */
const struct value_string gsm_pchant_descs[] = {
{ 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"
" (dynamic/ipaccess is an alias for tch/f_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_OSMO_DYN, "Dynamic TCH/F or TCH/H or SDCCH/8 or GPRS PDCH"
" (dynamic/osmocom is an alias for tch/f_tch/h_sdcch8_pdch)" },
/* These duplicate entries are needed to provide a description for both the DYNAMIC/... aliases and their
* explicit versions 'TCH/F_PDCH' / 'TCH/F_TCH/H_SDCCH8_PDCH', see bts_trx_vty_init() */
{ GSM_PCHAN_TCH_F_PDCH, "Dynamic TCH/F or GPRS PDCH"
" (dynamic/ipaccess is an alias for tch/f_pdch)" },
{ GSM_PCHAN_OSMO_DYN, "Dynamic TCH/F or TCH/H or SDCCH/8 or GPRS PDCH"
" (dynamic/osmocom is an alias for tch/f_tch/h_sdcch8_pdch)" },
{ 0, NULL }
};
osmo_static_assert(ARRAY_SIZE(gsm_pchant_names) == ARRAY_SIZE(gsm_pchant_descs), _pchan_vty_docs);
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);
}
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(const 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;
}
/* From a list of local BTSes that match the cell_id, return the Nth one, or NULL if there is no such
* match. */
struct gsm_bts *gsm_bts_by_cell_id(const struct gsm_network *net,
const struct gsm0808_cell_id *cell_id,
int match_idx)
{
struct gsm_bts *bts;
int i = 0;
llist_for_each_entry(bts, &net->bts_list, list) {
if (!gsm_bts_matches_cell_id(bts, cell_id))
continue;
if (i < match_idx) {
/* this is only the i'th match, we're looking for a later one... */
i++;
continue;
}
return bts;
}
return NULL;
}
static char ts2str[255];
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)
{
if (!ts->fi)
snprintf(ts2str, sizeof(ts2str),
"(bts=%d,trx=%d,ts=%d,pchan_from_config=%s, not allocated)",
ts->trx->bts->nr, ts->trx->nr, ts->nr,
gsm_pchan_name(ts->pchan_from_config));
else if (ts->fi->state == TS_ST_NOT_INITIALIZED)
snprintf(ts2str, sizeof(ts2str),
"(bts=%d,trx=%d,ts=%d,pchan_from_config=%s,state=%s)",
ts->trx->bts->nr, ts->trx->nr, ts->nr,
gsm_pchan_name(ts->pchan_from_config),
osmo_fsm_inst_state_name(ts->fi));
else if (ts->pchan_is == ts->pchan_on_init)
snprintf(ts2str, sizeof(ts2str),
"(bts=%d,trx=%d,ts=%d,pchan=%s,state=%s)",
ts->trx->bts->nr, ts->trx->nr, ts->nr,
gsm_pchan_name(ts->pchan_is),
osmo_fsm_inst_state_name(ts->fi));
else
snprintf(ts2str, sizeof(ts2str),
"(bts=%d,trx=%d,ts=%d,pchan_on_init=%s,pchan=%s,state=%s)",
ts->trx->bts->nr, ts->trx->nr, ts->nr,
gsm_pchan_name(ts->pchan_on_init),
gsm_pchan_name(ts->pchan_is),
osmo_fsm_inst_state_name(ts->fi));
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;
switch (obj_class) {
case NM_OC_BTS:
return &bts->mo;
case NM_OC_RADIO_CARRIER:
trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
return trx != NULL ? &trx->mo : NULL;
case NM_OC_BASEB_TRANSC:
trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
return trx != NULL ? &trx->bb_transc.mo : NULL;
case NM_OC_CHANNEL:
if (obj_inst->ts_nr >= TRX_NR_TS)
return NULL;
trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
return trx != NULL ? &trx->ts[obj_inst->ts_nr].mo : NULL;
case NM_OC_SITE_MANAGER:
return &bts->site_mgr->mo;
case NM_OC_BS11:
switch (obj_inst->bts_nr) {
case BS11_OBJ_CCLK:
return &bts->bs11.cclk.mo;
case BS11_OBJ_BBSIG:
trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
return trx != NULL ? &trx->bs11.bbsig.mo : NULL;
case BS11_OBJ_PA:
trx = gsm_bts_trx_num(bts, obj_inst->trx_nr);
return trx != NULL ? &trx->bs11.pa.mo : NULL;
}
break;
case NM_OC_BS11_RACK:
return &bts->bs11.rack.mo;
case NM_OC_BS11_ENVABTSE:
if (obj_inst->trx_nr >= ARRAY_SIZE(bts->bs11.envabtse))
return NULL;
return &bts->bs11.envabtse[obj_inst->trx_nr].mo;
case NM_OC_GPRS_NSE:
return &bts->site_mgr->gprs.nse.mo;
case NM_OC_GPRS_CELL:
return &bts->gprs.cell.mo;
case NM_OC_GPRS_NSVC:
if (obj_inst->trx_nr >= ARRAY_SIZE(bts->site_mgr->gprs.nsvc))
return NULL;
return &bts->site_mgr->gprs.nsvc[obj_inst->trx_nr].mo;
}
return NULL;
}
/* 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->site_mgr->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->site_mgr->gprs.nsvc))
return NULL;
obj = &bts->site_mgr->gprs.nsvc[obj_inst->trx_nr];
break;
}
return obj;
}
/* See Table 10.5.25 of GSM04.08 */
int gsm_pchan2chan_nr(enum gsm_phys_chan_config pchan,
uint8_t ts_nr, uint8_t lchan_nr, bool vamos_is_secondary)
{
uint8_t cbits, chan_nr;
switch (pchan) {
case GSM_PCHAN_TCH_F:
case GSM_PCHAN_TCH_F_PDCH:
if (lchan_nr != 0)
return -EINVAL;
if (vamos_is_secondary)
cbits = ABIS_RSL_CHAN_NR_CBITS_OSMO_VAMOS_Bm_ACCHs;
else
cbits = ABIS_RSL_CHAN_NR_CBITS_Bm_ACCHs;
break;
case GSM_PCHAN_PDCH:
if (lchan_nr != 0)
return -EINVAL;
cbits = ABIS_RSL_CHAN_NR_CBITS_OSMO_PDCH;
break;
case GSM_PCHAN_TCH_H:
if (lchan_nr >= 2)
return -EINVAL;
if (vamos_is_secondary)
cbits = ABIS_RSL_CHAN_NR_CBITS_OSMO_VAMOS_Lm_ACCHs(lchan_nr);
else
cbits = ABIS_RSL_CHAN_NR_CBITS_Lm_ACCHs(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.
* See osmo-bts-xxx/oml.c:opstart_compl().
*/
if (lchan_nr == CCCH_LCHAN)
lchan_nr = 0;
else if (lchan_nr > 4)
return -EINVAL;
cbits = ABIS_RSL_CHAN_NR_CBITS_SDCCH4_ACCH(lchan_nr);
break;
case GSM_PCHAN_SDCCH8_SACCH8C:
case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
if (lchan_nr >= 8)
return -EINVAL;
cbits = ABIS_RSL_CHAN_NR_CBITS_SDCCH8_ACCH(lchan_nr);
break;
default:
case GSM_PCHAN_CCCH:
if (lchan_nr != 0)
return -EINVAL;
cbits = ABIS_RSL_CHAN_NR_CBITS_BCCH;
break;
}
chan_nr = (cbits << 3) | (ts_nr & 0x7);
return chan_nr;
}
/* For RSL, to talk to osmo-bts, we introduce Osmocom specific channel number cbits to indicate VAMOS secondary lchans.
* However, in RR, which is sent to the MS, these special cbits must not be sent, but their "normal" equivalent; for RR
* messages, pass allow_osmo_cbits = false. */
int gsm_lchan_and_pchan2chan_nr(const struct gsm_lchan *lchan, enum gsm_phys_chan_config pchan, bool allow_osmo_cbits)
{
int rc;
uint8_t lchan_nr = lchan->nr;
/* Take care that we never send Osmocom specific cbits to non-Osmo BTS. */
if (allow_osmo_cbits && lchan->vamos.is_secondary
&& lchan->ts->trx->bts->model->type != GSM_BTS_TYPE_OSMOBTS) {
LOG_LCHAN(lchan, LOGL_ERROR, "Cannot address VAMOS shadow lchan on this BTS type: %s\n",
get_value_string(bts_type_names, lchan->ts->trx->bts->model->type));
return -ENOTSUP;
}
if (allow_osmo_cbits && lchan->ts->trx->bts->model->type != GSM_BTS_TYPE_OSMOBTS)
allow_osmo_cbits = false;
/* The VAMOS lchans are behind the primary ones in the ts->lchan[] array. They keep their lchan->nr as in the
* array, but on the wire they are the "shadow" lchans for the primary lchans. For example, for TCH/F, there is
* a primary ts->lchan[0] and a VAMOS ts->lchan[1]. Still, the VAMOS lchan should send chan_nr = 0. */
if (lchan->vamos.is_secondary)
lchan_nr -= lchan->ts->max_primary_lchans;
rc = gsm_pchan2chan_nr(pchan, lchan->ts->nr, lchan_nr,
allow_osmo_cbits ? lchan->vamos.is_secondary : false);
/* Log an error so that we don't need to add logging to each caller of this function */
if (rc < 0)
LOG_LCHAN(lchan, LOGL_ERROR,
"Error encoding Channel Number: pchan %s ts %u ss %u%s\n",
gsm_pchan_name(lchan->ts->pchan_from_config), lchan->ts->nr, lchan_nr,
lchan->vamos.is_secondary ? " (VAMOS shadow)" : "");
return rc;
}
int gsm_lchan2chan_nr(const struct gsm_lchan *lchan, bool allow_osmo_cbits)
{
return gsm_lchan_and_pchan2chan_nr(lchan, lchan->ts->pchan_is, allow_osmo_cbits);
}
static const uint8_t subslots_per_pchan[] = {
[GSM_PCHAN_NONE] = 0,
[GSM_PCHAN_CCCH] = 0,
[GSM_PCHAN_PDCH] = 0,
[GSM_PCHAN_CCCH_SDCCH4] = 4,
[GSM_PCHAN_TCH_F] = 1,
[GSM_PCHAN_TCH_H] = 2,
[GSM_PCHAN_SDCCH8_SACCH8C] = 8,
[GSM_PCHAN_CCCH_SDCCH4_CBCH] = 4,
[GSM_PCHAN_SDCCH8_SACCH8C_CBCH] = 8,
/* Dyn TS: maximum allowed subslots */
[GSM_PCHAN_OSMO_DYN] = 8,
[GSM_PCHAN_TCH_F_PDCH] = 1,
};
/*! Return the maximum number of logical channels that may be used in a timeslot of the given physical channel
* configuration. */
uint8_t pchan_subslots(enum gsm_phys_chan_config pchan)
{
if (pchan < 0 || pchan >= ARRAY_SIZE(subslots_per_pchan))
return 0;
return subslots_per_pchan[pchan];
}
static const uint8_t subslots_per_pchan_vamos[] = {
[GSM_PCHAN_NONE] = 0,
[GSM_PCHAN_CCCH] = 0,
[GSM_PCHAN_PDCH] = 0,
[GSM_PCHAN_CCCH_SDCCH4] = 0,
/* VAMOS: on a TCH/F, there may be a TCH/H shadow */
[GSM_PCHAN_TCH_F] = 2,
[GSM_PCHAN_TCH_H] = 2,
[GSM_PCHAN_SDCCH8_SACCH8C] = 0,
[GSM_PCHAN_CCCH_SDCCH4_CBCH] = 0,
[GSM_PCHAN_SDCCH8_SACCH8C_CBCH] = 0,
[GSM_PCHAN_OSMO_DYN] = 0,
[GSM_PCHAN_TCH_F_PDCH] = 2,
};
/* Return the maximum number of VAMOS secondary lchans that may be used in a timeslot of the given physical channel
* configuration. */
uint8_t pchan_subslots_vamos(enum gsm_phys_chan_config pchan)
{
if (pchan < 0 || pchan >= ARRAY_SIZE(subslots_per_pchan_vamos))
return 0;
return subslots_per_pchan_vamos[pchan];
}
static bool pchan_is_tch(enum gsm_phys_chan_config pchan)
{
switch (pchan) {
case GSM_PCHAN_TCH_F:
case GSM_PCHAN_TCH_H:
return true;
default:
return false;
}
}
bool ts_is_tch(struct gsm_bts_trx_ts *ts)
{
return pchan_is_tch(ts->pchan_is);
}
struct gsm_bts *conn_get_bts(struct gsm_subscriber_connection *conn) {
if (!conn || !conn->lchan)
return NULL;
return conn->lchan->ts->trx->bts;
}
static void _chan_desc_fill_tail(struct gsm48_chan_desc *cd, const struct gsm_lchan *lchan,
uint8_t tsc)
{
if (!lchan->ts->hopping.enabled) {
uint16_t arfcn = lchan->ts->trx->arfcn & 0x3ff;
cd->h0.tsc = tsc;
cd->h0.h = 0;
cd->h0.spare = 0;
cd->h0.arfcn_high = arfcn >> 8;
cd->h0.arfcn_low = arfcn & 0xff;
} else {
cd->h1.tsc = tsc;
cd->h1.h = 1;
cd->h1.maio_high = lchan->ts->hopping.maio >> 2;
cd->h1.maio_low = lchan->ts->hopping.maio & 0x03;
cd->h1.hsn = lchan->ts->hopping.hsn;
}
}
int gsm48_lchan_and_pchan2chan_desc(struct gsm48_chan_desc *cd,
const struct gsm_lchan *lchan,
enum gsm_phys_chan_config pchan,
uint8_t tsc, bool allow_osmo_cbits)
{
int chan_nr = gsm_lchan_and_pchan2chan_nr(lchan, pchan, allow_osmo_cbits);
if (chan_nr < 0) {
/* Log an error so that we don't need to add logging to each caller of this function */
LOG_LCHAN(lchan, LOGL_ERROR,
"Error encoding Channel Number: pchan %s ts %u ss %u%s (rc = %d)\n",
gsm_pchan_name(pchan), lchan->ts->nr, lchan->nr,
lchan->vamos.is_secondary ? " (VAMOS shadow)" : "", chan_nr);
return chan_nr;
}
cd->chan_nr = chan_nr;
_chan_desc_fill_tail(cd, lchan, tsc);
return 0;
}
int gsm48_lchan2chan_desc(struct gsm48_chan_desc *cd,
const struct gsm_lchan *lchan,
uint8_t tsc, bool allow_osmo_cbits)
{
return gsm48_lchan_and_pchan2chan_desc(cd, lchan, lchan->ts->pchan_is, tsc, allow_osmo_cbits);
}
uint8_t gsm_ts_tsc(const struct gsm_bts_trx_ts *ts)
{
if (ts->tsc != -1)
return ts->tsc;
else
return ts->trx->bts->bsic & 7;
}
bool nm_is_running(const struct gsm_nm_state *s) {
if (s->operational != NM_OPSTATE_ENABLED)
return false;
if (s->availability != NM_AVSTATE_OK)
return false;
if (s->administrative != NM_STATE_UNLOCKED)
return false;
return true;
}
/* determine the logical channel type based on the physical channel type */
int gsm_lchan_type_by_pchan(enum gsm_phys_chan_config pchan)
{
switch (pchan) {
case GSM_PCHAN_TCH_F:
return GSM_LCHAN_TCH_F;
case GSM_PCHAN_TCH_H:
return GSM_LCHAN_TCH_H;
case GSM_PCHAN_SDCCH8_SACCH8C:
case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
case GSM_PCHAN_CCCH_SDCCH4:
case GSM_PCHAN_CCCH_SDCCH4_CBCH:
return GSM_LCHAN_SDCCH;
default:
return -1;
}
}
enum gsm_phys_chan_config gsm_pchan_by_lchan_type(enum gsm_chan_t type)
{
switch (type) {
case GSM_LCHAN_TCH_F:
return GSM_PCHAN_TCH_F;
case GSM_LCHAN_TCH_H:
return GSM_PCHAN_TCH_H;
case GSM_LCHAN_SDCCH:
return GSM_PCHAN_SDCCH8_SACCH8C;
case GSM_LCHAN_NONE:
case GSM_LCHAN_PDTCH:
/* TODO: so far lchan->type is NONE in PDCH mode. PDTCH is only
* used in osmo-bts. Maybe set PDTCH and drop the NONE case
* here. */
return GSM_PCHAN_PDCH;
default:
return GSM_PCHAN_UNKNOWN;
}
}
enum channel_rate chan_t_to_chan_rate(enum gsm_chan_t chan_t)
{
switch (chan_t) {
case GSM_LCHAN_SDCCH:
return CH_RATE_SDCCH;
case GSM_LCHAN_TCH_F:
return CH_RATE_FULL;
case GSM_LCHAN_TCH_H:
return CH_RATE_HALF;
default:
/* For other channel types, the channel_rate value is never used. It is fine to return an invalid value,
* and callers don't actually need to check for this. */
return -1;
}
}
/* Can the timeslot in principle be used as this PCHAN kind? */
bool ts_is_capable_of_pchan(struct gsm_bts_trx_ts *ts, enum gsm_phys_chan_config pchan)
{
switch (ts->pchan_on_init) {
case GSM_PCHAN_TCH_F_PDCH:
switch (pchan) {
case GSM_PCHAN_TCH_F:
case GSM_PCHAN_PDCH:
return true;
default:
return false;
}
case GSM_PCHAN_OSMO_DYN:
switch (pchan) {
case GSM_PCHAN_TCH_F:
case GSM_PCHAN_TCH_H:
case GSM_PCHAN_PDCH:
case GSM_PCHAN_SDCCH8_SACCH8C:
return true;
default:
return false;
}
case GSM_PCHAN_CCCH_SDCCH4_CBCH:
switch (pchan) {
case GSM_PCHAN_CCCH_SDCCH4_CBCH:
case GSM_PCHAN_CCCH_SDCCH4:
case GSM_PCHAN_CCCH:
return true;
default:
return false;
}
case GSM_PCHAN_CCCH_SDCCH4:
switch (pchan) {
case GSM_PCHAN_CCCH_SDCCH4:
case GSM_PCHAN_CCCH:
return true;
default:
return false;
}
case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
switch (pchan) {
case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
case GSM_PCHAN_SDCCH8_SACCH8C:
return true;
default:
return false;
}
default:
return ts->pchan_on_init == pchan;
}
}
bool ts_is_capable_of_lchant(struct gsm_bts_trx_ts *ts, enum gsm_chan_t type)
{
switch (ts->pchan_on_init) {
case GSM_PCHAN_TCH_F:
switch (type) {
case GSM_LCHAN_TCH_F:
return true;
default:
return false;
}
case GSM_PCHAN_TCH_H:
switch (type) {
case GSM_LCHAN_TCH_H:
return true;
default:
return false;
}
case GSM_PCHAN_TCH_F_PDCH:
switch (type) {
case GSM_LCHAN_TCH_F:
case GSM_LCHAN_PDTCH:
return true;
default:
return false;
}
case GSM_PCHAN_OSMO_DYN:
switch (type) {
case GSM_LCHAN_TCH_F:
case GSM_LCHAN_TCH_H:
case GSM_LCHAN_PDTCH:
case GSM_LCHAN_SDCCH:
return true;
default:
return false;
}
case GSM_PCHAN_PDCH:
switch (type) {
case GSM_LCHAN_PDTCH:
return true;
default:
return false;
}
case GSM_PCHAN_CCCH:
switch (type) {
case GSM_LCHAN_CCCH:
return true;
default:
return false;
}
break;
case GSM_PCHAN_CCCH_SDCCH4_CBCH:
case GSM_PCHAN_CCCH_SDCCH4:
case GSM_PCHAN_SDCCH8_SACCH8C:
case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
switch (type) {
case GSM_LCHAN_CCCH:
case GSM_LCHAN_SDCCH:
return true;
default:
return false;
}
default:
return false;
}
}
bool ts_is_usable(const struct gsm_bts_trx_ts *ts)
{
if (!trx_is_usable(ts->trx))
return false;
if (!ts->fi)
return false;
switch (ts->fi->state) {
case TS_ST_NOT_INITIALIZED:
case TS_ST_BORKEN:
return false;
default:
break;
}
return true;
}
void conn_update_ms_power_class(struct gsm_subscriber_connection *conn, uint8_t power_class)
{
struct gsm_bts *bts = conn_get_bts(conn);
/* MS Power class remains the same => do nothing */
if (power_class == conn->ms_power_class)
return;
LOGP(DRLL, LOGL_DEBUG, "MS Power class update: %" PRIu8 " -> %" PRIu8 "\n",
conn->ms_power_class, power_class);
conn->ms_power_class = power_class;
/* If there's an associated lchan, attempt to update its max power to be
on track with band maximum values */
if (bts && conn->lchan)
lchan_update_ms_power_ctrl_level(conn->lchan, bts->ms_max_power);
}
const struct value_string lchan_activate_mode_names[] = {
OSMO_VALUE_STRING(ACTIVATE_FOR_NONE),
OSMO_VALUE_STRING(ACTIVATE_FOR_MS_CHANNEL_REQUEST),
OSMO_VALUE_STRING(ACTIVATE_FOR_ASSIGNMENT),
OSMO_VALUE_STRING(ACTIVATE_FOR_HANDOVER),
OSMO_VALUE_STRING(ACTIVATE_FOR_VGCS_CHANNEL),
OSMO_VALUE_STRING(ACTIVATE_FOR_VTY),
{}
};
const struct value_string lchan_modify_for_names[] = {
OSMO_VALUE_STRING(MODIFY_FOR_NONE),
OSMO_VALUE_STRING(MODIFY_FOR_ASSIGNMENT),
OSMO_VALUE_STRING(MODIFY_FOR_VTY),
{}
};
const struct value_string assign_for_names[] = {
OSMO_VALUE_STRING(ASSIGN_FOR_NONE),
OSMO_VALUE_STRING(ASSIGN_FOR_BSSMAP_REQ),
OSMO_VALUE_STRING(ASSIGN_FOR_CONGESTION_RESOLUTION),
OSMO_VALUE_STRING(ASSIGN_FOR_VTY),
{}
};
/* This may be specific to RR Channel Release, and the mappings were chosen by pure naive guessing without a proper
* specification available. */
enum gsm48_rr_cause bsc_gsm48_rr_cause_from_gsm0808_cause(enum gsm0808_cause c)
{
switch (c) {
case GSM0808_CAUSE_PREEMPTION:
return GSM48_RR_CAUSE_PREMPTIVE_REL;
case GSM0808_CAUSE_RADIO_INTERFACE_MESSAGE_FAILURE:
case GSM0808_CAUSE_INVALID_MESSAGE_CONTENTS:
case GSM0808_CAUSE_INFORMATION_ELEMENT_OR_FIELD_MISSING:
case GSM0808_CAUSE_INCORRECT_VALUE:
case GSM0808_CAUSE_UNKNOWN_MESSAGE_TYPE:
case GSM0808_CAUSE_UNKNOWN_INFORMATION_ELEMENT:
return GSM48_RR_CAUSE_PROT_ERROR_UNSPC;
case GSM0808_CAUSE_CALL_CONTROL:
case GSM0808_CAUSE_HANDOVER_SUCCESSFUL:
case GSM0808_CAUSE_BETTER_CELL:
case GSM0808_CAUSE_DIRECTED_RETRY:
case GSM0808_CAUSE_REDUCE_LOAD_IN_SERVING_CELL:
case GSM0808_CAUSE_RELOCATION_TRIGGERED:
case GSM0808_CAUSE_ALT_CHAN_CONFIG_REQUESTED:
return GSM48_RR_CAUSE_NORMAL;
default:
return GSM48_RR_CAUSE_ABNORMAL_UNSPEC;
}
}
/* Map RSL_ERR_* cause codes to gsm48_rr_cause codes.
* The mappings were chosen by naive guessing without a proper specification available. */
enum gsm48_rr_cause bsc_gsm48_rr_cause_from_rsl_cause(uint8_t c)
{
switch (c) {
case RSL_ERR_NORMAL_UNSPEC:
return GSM48_RR_CAUSE_NORMAL;
case RSL_ERR_MAND_IE_ERROR:
return GSM48_RR_CAUSE_INVALID_MAND_INF;
case RSL_ERR_OPT_IE_ERROR:
return GSM48_RR_CAUSE_COND_IE_ERROR;
case RSL_ERR_INVALID_MESSAGE:
case RSL_ERR_MSG_DISCR:
case RSL_ERR_MSG_TYPE:
case RSL_ERR_MSG_SEQ:
case RSL_ERR_IE_ERROR:
case RSL_ERR_IE_NONEXIST:
case RSL_ERR_IE_LENGTH:
case RSL_ERR_IE_CONTENT:
case RSL_ERR_PROTO:
return GSM48_RR_CAUSE_PROT_ERROR_UNSPC;
default:
return GSM48_RR_CAUSE_ABNORMAL_UNSPEC;
}
}
/* Default Interference Measurement Parameters */
const struct gsm_interf_meas_params interf_meas_params_def = {
.avg_period = 6, /* 6 SACCH periods */
.bounds_dbm = {
115, /* 0: -115 dBm */
109, /* X1: -109 dBm */
103, /* X2: -103 dBm */
97, /* X3: -97 dBm */
91, /* X4: -91 dBm */
85, /* X5: -85 dBm */
},
};
enum rsl_cmod_spd chan_mode_to_rsl_cmod_spd(enum gsm48_chan_mode chan_mode)
{
switch (gsm48_chan_mode_to_non_vamos(chan_mode)) {
case GSM48_CMODE_SIGN:
return RSL_CMOD_SPD_SIGN;
case GSM48_CMODE_SPEECH_V1:
case GSM48_CMODE_SPEECH_EFR:
case GSM48_CMODE_SPEECH_AMR:
return RSL_CMOD_SPD_SPEECH;
case GSM48_CMODE_DATA_14k5:
case GSM48_CMODE_DATA_12k0:
case GSM48_CMODE_DATA_6k0:
case GSM48_CMODE_DATA_3k6:
return RSL_CMOD_SPD_DATA;
default:
return -EINVAL;
}
}
int gsm_audio_support_cmp(const struct gsm_audio_support *a, const struct gsm_audio_support *b)
{
int rc;
if (a == b)
return 0;
if (!a)
return -1;
if (!b)
return 1;
rc = OSMO_CMP(a->hr, b->hr);
if (rc)
return rc;
return OSMO_CMP(a->ver, b->ver);
}
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