423 lines
12 KiB
C
423 lines
12 KiB
C
/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#include <netinet/in.h>
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#include <osmocom/core/linuxlist.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/statistics.h>
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#include <osmocom/core/fsm.h>
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#include <osmocom/gsm/gsm_utils.h>
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#include <osmocom/gsm/abis_nm.h>
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#include <osmocom/codec/ecu.h>
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#include <osmo-bts/gsm_data.h>
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#include <osmo-bts/bts.h>
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#include <osmo-bts/bts_trx.h>
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#include <osmo-bts/logging.h>
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const struct value_string gsm_pchant_names[13] = {
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{ GSM_PCHAN_NONE, "NONE" },
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{ GSM_PCHAN_CCCH, "CCCH" },
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{ GSM_PCHAN_CCCH_SDCCH4,"CCCH+SDCCH4" },
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{ GSM_PCHAN_TCH_F, "TCH/F" },
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{ GSM_PCHAN_TCH_H, "TCH/H" },
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{ GSM_PCHAN_SDCCH8_SACCH8C, "SDCCH8" },
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{ GSM_PCHAN_PDCH, "PDCH" },
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{ GSM_PCHAN_TCH_F_PDCH, "TCH/F_PDCH" },
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{ GSM_PCHAN_UNKNOWN, "UNKNOWN" },
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{ GSM_PCHAN_CCCH_SDCCH4_CBCH, "CCCH+SDCCH4+CBCH" },
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{ GSM_PCHAN_SDCCH8_SACCH8C_CBCH, "SDCCH8+CBCH" },
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{ GSM_PCHAN_TCH_F_TCH_H_PDCH, "TCH/F_TCH/H_PDCH" },
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{ 0, NULL }
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};
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const struct value_string gsm_pchant_descs[13] = {
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{ GSM_PCHAN_NONE, "Physical Channel not configured" },
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{ GSM_PCHAN_CCCH, "FCCH + SCH + BCCH + CCCH (Comb. IV)" },
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{ GSM_PCHAN_CCCH_SDCCH4,
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"FCCH + SCH + BCCH + CCCH + 4 SDCCH + 2 SACCH (Comb. V)" },
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{ GSM_PCHAN_TCH_F, "TCH/F + FACCH/F + SACCH (Comb. I)" },
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{ GSM_PCHAN_TCH_H, "2 TCH/H + 2 FACCH/H + 2 SACCH (Comb. II)" },
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{ GSM_PCHAN_SDCCH8_SACCH8C, "8 SDCCH + 4 SACCH (Comb. VII)" },
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{ GSM_PCHAN_PDCH, "Packet Data Channel for GPRS/EDGE" },
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{ GSM_PCHAN_TCH_F_PDCH, "Dynamic TCH/F or GPRS PDCH" },
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{ GSM_PCHAN_UNKNOWN, "Unknown / Unsupported channel combination" },
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{ GSM_PCHAN_CCCH_SDCCH4_CBCH, "FCCH + SCH + BCCH + CCCH + CBCH + 3 SDCCH + 2 SACCH (Comb. V)" },
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{ GSM_PCHAN_SDCCH8_SACCH8C_CBCH, "7 SDCCH + 4 SACCH + CBCH (Comb. VII)" },
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{ GSM_PCHAN_TCH_F_TCH_H_PDCH, "Dynamic TCH/F or TCH/H or GPRS PDCH" },
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{ 0, NULL }
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};
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const char *gsm_pchan_name(enum gsm_phys_chan_config c)
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{
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return get_value_string(gsm_pchant_names, c);
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}
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enum gsm_phys_chan_config gsm_pchan_parse(const char *name)
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{
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return get_string_value(gsm_pchant_names, name);
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}
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/* TODO: move to libosmocore, next to gsm_chan_t_names? */
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const char *gsm_lchant_name(enum gsm_chan_t c)
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{
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return get_value_string(gsm_chan_t_names, c);
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}
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static const struct value_string lchan_s_names[] = {
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{ LCHAN_S_NONE, "NONE" },
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{ LCHAN_S_ACT_REQ, "ACTIVATION REQUESTED" },
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{ LCHAN_S_ACTIVE, "ACTIVE" },
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{ LCHAN_S_INACTIVE, "INACTIVE" },
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{ LCHAN_S_REL_REQ, "RELEASE REQUESTED" },
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{ LCHAN_S_REL_ERR, "RELEASE DUE ERROR" },
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{ LCHAN_S_BROKEN, "BROKEN UNUSABLE" },
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{ 0, NULL }
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};
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const char *gsm_lchans_name(enum gsm_lchan_state s)
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{
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return get_value_string(lchan_s_names, s);
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}
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static char ts2str[255];
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char *gsm_ts_name(const struct gsm_bts_trx_ts *ts)
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{
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snprintf(ts2str, sizeof(ts2str), "(bts=%d,trx=%d,ts=%d)",
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ts->trx->bts->nr, ts->trx->nr, ts->nr);
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return ts2str;
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}
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/*! Log timeslot number with full pchan information */
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char *gsm_ts_and_pchan_name(const struct gsm_bts_trx_ts *ts)
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{
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switch (ts->pchan) {
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case GSM_PCHAN_TCH_F_TCH_H_PDCH:
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if (ts->dyn.pchan_is == ts->dyn.pchan_want)
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snprintf(ts2str, sizeof(ts2str),
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"(bts=%d,trx=%d,ts=%d,pchan=%s as %s)",
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ts->trx->bts->nr, ts->trx->nr, ts->nr,
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gsm_pchan_name(ts->pchan),
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gsm_pchan_name(ts->dyn.pchan_is));
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else
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snprintf(ts2str, sizeof(ts2str),
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"(bts=%d,trx=%d,ts=%d,pchan=%s"
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" switching %s -> %s)",
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ts->trx->bts->nr, ts->trx->nr, ts->nr,
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gsm_pchan_name(ts->pchan),
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gsm_pchan_name(ts->dyn.pchan_is),
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gsm_pchan_name(ts->dyn.pchan_want));
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break;
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case GSM_PCHAN_TCH_F_PDCH:
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if ((ts->flags & TS_F_PDCH_PENDING_MASK) == 0)
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snprintf(ts2str, sizeof(ts2str),
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"(bts=%d,trx=%d,ts=%d,pchan=%s as %s)",
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ts->trx->bts->nr, ts->trx->nr, ts->nr,
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gsm_pchan_name(ts->pchan),
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(ts->flags & TS_F_PDCH_ACTIVE)? "PDCH"
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: "TCH/F");
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else
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snprintf(ts2str, sizeof(ts2str),
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"(bts=%d,trx=%d,ts=%d,pchan=%s"
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" switching %s -> %s)",
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ts->trx->bts->nr, ts->trx->nr, ts->nr,
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gsm_pchan_name(ts->pchan),
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(ts->flags & TS_F_PDCH_ACTIVE)? "PDCH"
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: "TCH/F",
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(ts->flags & TS_F_PDCH_ACT_PENDING)? "PDCH"
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: "TCH/F");
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break;
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default:
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snprintf(ts2str, sizeof(ts2str), "(bts=%d,trx=%d,ts=%d,pchan=%s)",
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ts->trx->bts->nr, ts->trx->nr, ts->nr,
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gsm_pchan_name(ts->pchan));
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break;
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}
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return ts2str;
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}
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char *gsm_lchan_name_compute(const struct gsm_lchan *lchan)
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{
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struct gsm_bts_trx_ts *ts = lchan->ts;
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snprintf(ts2str, sizeof(ts2str), "(bts=%d,trx=%d,ts=%d,ss=%d)",
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ts->trx->bts->nr, ts->trx->nr, ts->nr, lchan->nr);
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return ts2str;
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}
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/* See Table 10.5.25 of GSM04.08 */
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static uint8_t gsm_pchan2chan_nr(enum gsm_phys_chan_config pchan,
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uint8_t ts_nr, uint8_t lchan_nr)
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{
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uint8_t cbits, chan_nr;
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OSMO_ASSERT(pchan != GSM_PCHAN_TCH_F_TCH_H_PDCH);
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OSMO_ASSERT(pchan != GSM_PCHAN_TCH_F_PDCH);
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switch (pchan) {
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case GSM_PCHAN_TCH_F:
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OSMO_ASSERT(lchan_nr == 0);
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cbits = 0x01;
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break;
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case GSM_PCHAN_PDCH:
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OSMO_ASSERT(lchan_nr == 0);
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cbits = RSL_CHAN_OSMO_PDCH >> 3;
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break;
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case GSM_PCHAN_TCH_H:
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OSMO_ASSERT(lchan_nr < 2);
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cbits = 0x02;
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cbits += lchan_nr;
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break;
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case GSM_PCHAN_CCCH_SDCCH4:
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case GSM_PCHAN_CCCH_SDCCH4_CBCH:
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/*
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* As a special hack for BCCH, lchan_nr == 4 may be passed
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* here. This should never be sent in an RSL message.
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* See osmo-bts-xxx/oml.c:opstart_compl().
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*/
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if (lchan_nr == CCCH_LCHAN)
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cbits = 0x10; /* BCCH */
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else {
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OSMO_ASSERT(lchan_nr < 4);
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cbits = 0x04;
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cbits += lchan_nr;
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}
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break;
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case GSM_PCHAN_SDCCH8_SACCH8C:
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case GSM_PCHAN_SDCCH8_SACCH8C_CBCH:
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OSMO_ASSERT(lchan_nr < 8);
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cbits = 0x08;
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cbits += lchan_nr;
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break;
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case GSM_PCHAN_CCCH:
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cbits = 0x10;
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break;
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case GSM_PCHAN_NONE:
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LOGP(DRSL, LOGL_ERROR, "Physical channel %s not expected!\n",
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gsm_pchan_name(pchan));
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cbits = 0x00;
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break;
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default:
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LOGP(DRSL, LOGL_ERROR, "Physical channel %s (0x%02x) not expected!\n",
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gsm_pchan_name(pchan), (int)pchan);
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/* OSMO_ASSERT(lchan_nr == 0);
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* FIXME: On octphy and litecell, we hit above assertion (see
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* Max's comment at https://gerrit.osmocom.org/589 ); disabled
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* for BTS until this is clarified; remove the #ifdef when it
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* is fixed. Tracked in OS#2906.
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*/
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#pragma message "fix caller that passes lchan_nr != 0"
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cbits = 0x10;
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break;
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}
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chan_nr = (cbits << 3) | (ts_nr & 0x7);
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return chan_nr;
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}
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uint8_t gsm_lchan2chan_nr(const struct gsm_lchan *lchan)
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{
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switch (lchan->ts->pchan) {
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case GSM_PCHAN_TCH_F_TCH_H_PDCH:
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/* Return chan_nr reflecting the current TS pchan, either a standard TCH kind, or the
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* nonstandard value reflecting PDCH for Osmocom style dyn TS. */
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return gsm_lchan_as_pchan2chan_nr(lchan,
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lchan->ts->dyn.pchan_is);
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case GSM_PCHAN_TCH_F_PDCH:
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/* For ip.access style dyn TS, we always want to use the chan_nr as if it was TCH/F.
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* We're using custom PDCH ACT and DEACT messages that use the usual chan_nr values. */
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return gsm_lchan_as_pchan2chan_nr(lchan, GSM_PCHAN_TCH_F);
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default:
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return gsm_pchan2chan_nr(lchan->ts->pchan, lchan->ts->nr, lchan->nr);
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}
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}
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uint8_t gsm_lchan_as_pchan2chan_nr(const struct gsm_lchan *lchan,
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enum gsm_phys_chan_config as_pchan)
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{
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if (lchan->ts->pchan == GSM_PCHAN_TCH_F_TCH_H_PDCH
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&& as_pchan == GSM_PCHAN_PDCH)
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return RSL_CHAN_OSMO_PDCH | (lchan->ts->nr & ~RSL_CHAN_NR_MASK);
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return gsm_pchan2chan_nr(as_pchan, lchan->ts->nr, lchan->nr);
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}
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uint8_t gsm_ts_tsc(const struct gsm_bts_trx_ts *ts)
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{
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if (ts->tsc != -1)
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return ts->tsc;
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else
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return ts->trx->bts->bsic & 7;
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}
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/* determine logical channel based on TRX and channel number IE */
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struct gsm_lchan *rsl_lchan_lookup(struct gsm_bts_trx *trx, uint8_t chan_nr,
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int *rc)
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{
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uint8_t ts_nr = chan_nr & 0x07;
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uint8_t cbits = chan_nr >> 3;
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uint8_t lch_idx;
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struct gsm_bts_trx_ts *ts = &trx->ts[ts_nr];
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bool ok = true;
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if (rc)
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*rc = -EINVAL;
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if (cbits == 0x01) {
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lch_idx = 0; /* TCH/F */
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if (ts->pchan != GSM_PCHAN_TCH_F &&
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ts->pchan != GSM_PCHAN_PDCH &&
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ts->pchan != GSM_PCHAN_TCH_F_PDCH &&
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ts->pchan != GSM_PCHAN_TCH_F_TCH_H_PDCH)
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ok = false;
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} else if ((cbits & 0x1e) == 0x02) {
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lch_idx = cbits & 0x1; /* TCH/H */
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if (ts->pchan != GSM_PCHAN_TCH_H &&
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ts->pchan != GSM_PCHAN_TCH_F_TCH_H_PDCH)
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ok = false;
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} else if ((cbits & 0x1c) == 0x04) {
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lch_idx = cbits & 0x3; /* SDCCH/4 */
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if (ts->pchan != GSM_PCHAN_CCCH_SDCCH4 &&
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ts->pchan != GSM_PCHAN_CCCH_SDCCH4_CBCH)
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ok = false;
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} else if ((cbits & 0x18) == 0x08) {
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lch_idx = cbits & 0x7; /* SDCCH/8 */
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if (ts->pchan != GSM_PCHAN_SDCCH8_SACCH8C &&
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ts->pchan != GSM_PCHAN_SDCCH8_SACCH8C_CBCH)
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ok = false;
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} else if (cbits == 0x10 || cbits == 0x11 || cbits == 0x12) {
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lch_idx = 0;
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if (ts->pchan != GSM_PCHAN_CCCH &&
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ts->pchan != GSM_PCHAN_CCCH_SDCCH4 &&
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ts->pchan != GSM_PCHAN_CCCH_SDCCH4_CBCH)
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ok = false;
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/* FIXME: we should not return first sdcch4 !!! */
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} else if ((chan_nr & RSL_CHAN_NR_MASK) == RSL_CHAN_OSMO_PDCH) {
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lch_idx = 0;
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if (ts->pchan != GSM_PCHAN_TCH_F_TCH_H_PDCH)
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ok = false;
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} else
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return NULL;
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if (rc && ok)
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*rc = 0;
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return &ts->lchan[lch_idx];
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}
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static const uint8_t subslots_per_pchan[] = {
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[GSM_PCHAN_NONE] = 0,
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[GSM_PCHAN_CCCH] = 0,
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[GSM_PCHAN_PDCH] = 0,
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[GSM_PCHAN_CCCH_SDCCH4] = 4,
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[GSM_PCHAN_TCH_F] = 1,
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[GSM_PCHAN_TCH_H] = 2,
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[GSM_PCHAN_SDCCH8_SACCH8C] = 8,
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[GSM_PCHAN_CCCH_SDCCH4_CBCH] = 4,
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[GSM_PCHAN_SDCCH8_SACCH8C_CBCH] = 8,
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/*
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* GSM_PCHAN_TCH_F_PDCH and GSM_PCHAN_TCH_F_TCH_H_PDCH should not be
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* part of this, those TS are handled according to their dynamic state.
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*/
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};
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/*! Return the actual pchan type, also heeding dynamic TS. */
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enum gsm_phys_chan_config ts_pchan(struct gsm_bts_trx_ts *ts)
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{
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switch (ts->pchan) {
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case GSM_PCHAN_TCH_F_TCH_H_PDCH:
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return ts->dyn.pchan_is;
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case GSM_PCHAN_TCH_F_PDCH:
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if (ts->flags & TS_F_PDCH_ACTIVE)
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return GSM_PCHAN_PDCH;
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else
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return GSM_PCHAN_TCH_F;
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default:
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return ts->pchan;
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}
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}
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/*! According to ts->pchan and possibly ts->dyn_pchan, return the number of
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* logical channels available in the timeslot. */
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uint8_t ts_subslots(struct gsm_bts_trx_ts *ts)
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{
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return subslots_per_pchan[ts_pchan(ts)];
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}
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static bool pchan_is_tch(enum gsm_phys_chan_config pchan)
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{
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switch (pchan) {
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case GSM_PCHAN_TCH_F:
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case GSM_PCHAN_TCH_H:
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return true;
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default:
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return false;
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}
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}
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bool ts_is_tch(struct gsm_bts_trx_ts *ts)
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{
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return pchan_is_tch(ts_pchan(ts));
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}
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const struct value_string lchan_ciph_state_names[] = {
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{ LCHAN_CIPH_NONE, "NONE" },
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{ LCHAN_CIPH_RX_REQ, "RX_REQ" },
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{ LCHAN_CIPH_RX_CONF, "RX_CONF" },
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{ LCHAN_CIPH_RXTX_REQ, "RXTX_REQ" },
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{ LCHAN_CIPH_RX_CONF_TX_REQ, "RX_CONF_TX_REQ" },
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{ LCHAN_CIPH_RXTX_CONF, "RXTX_CONF" },
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{ 0, NULL }
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};
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/* determine the ECU codec constant for the codec used by given lchan */
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int lchan2ecu_codec(const struct gsm_lchan *lchan)
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{
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struct gsm_bts_trx_ts *ts = lchan->ts;
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switch (lchan->tch_mode) {
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case GSM48_CMODE_SPEECH_V1:
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if (ts_pchan(ts) == GSM_PCHAN_TCH_H)
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return OSMO_ECU_CODEC_HR;
|
|
else
|
|
return OSMO_ECU_CODEC_FR;
|
|
break;
|
|
case GSM48_CMODE_SPEECH_EFR:
|
|
return OSMO_ECU_CODEC_EFR;
|
|
case GSM48_CMODE_SPEECH_AMR:
|
|
return OSMO_ECU_CODEC_AMR;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|