2013-07-29 07:42:23 +00:00
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/* L1 SAP primitives */
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/* (C) 2011 by Harald Welte <laforge@gnumonks.org>
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* (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
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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 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 <stdint.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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2016-09-17 12:15:03 +00:00
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#include <stdbool.h>
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2013-07-29 07:42:23 +00:00
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/gsm/l1sap.h>
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#include <osmocom/core/gsmtap.h>
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#include <osmocom/core/gsmtap_util.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/trau/osmo_ortp.h>
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#include <osmo-bts/logging.h>
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#include <osmo-bts/gsm_data.h>
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#include <osmo-bts/l1sap.h>
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2016-10-03 15:37:45 +00:00
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#include <osmo-bts/dtx_dl_amr_fsm.h>
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2013-07-29 07:42:23 +00:00
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#include <osmo-bts/pcu_if.h>
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#include <osmo-bts/measurement.h>
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#include <osmo-bts/bts.h>
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#include <osmo-bts/rsl.h>
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#include <osmo-bts/bts_model.h>
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2014-08-27 15:13:20 +00:00
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#include <osmo-bts/handover.h>
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2016-01-04 19:29:24 +00:00
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#include <osmo-bts/power_control.h>
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2016-09-17 12:15:03 +00:00
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#include <osmo-bts/msg_utils.h>
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2013-07-29 07:42:23 +00:00
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2016-06-23 13:39:31 +00:00
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struct gsm_lchan *get_lchan_by_chan_nr(struct gsm_bts_trx *trx,
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unsigned int chan_nr)
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2015-12-05 10:54:08 +00:00
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{
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return &trx->ts[L1SAP_CHAN2TS(chan_nr)].lchan[l1sap_chan2ss(chan_nr)];
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}
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static struct gsm_lchan *
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get_active_lchan_by_chan_nr(struct gsm_bts_trx *trx, unsigned int chan_nr)
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{
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struct gsm_lchan *lchan = get_lchan_by_chan_nr(trx, chan_nr);
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2016-01-15 14:21:32 +00:00
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if (lchan && lchan->state != LCHAN_S_ACTIVE) {
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LOGP(DL1P, LOGL_NOTICE, "%s: assuming active lchan, but "
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"state is %s\n", gsm_lchan_name(lchan),
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gsm_lchans_name(lchan->state));
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2015-12-05 10:54:08 +00:00
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return NULL;
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2016-01-15 14:21:32 +00:00
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}
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2015-12-05 10:54:08 +00:00
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return lchan;
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}
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2013-07-29 07:42:23 +00:00
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static int l1sap_down(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap);
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2016-06-03 11:29:29 +00:00
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static uint32_t fn_ms_adj(uint32_t fn, uint32_t last_fn)
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{
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2016-10-06 14:03:18 +00:00
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if (last_fn != LCHAN_FN_DUMMY) {
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2016-10-11 16:13:32 +00:00
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/* 12/13 frames usable for audio in TCH,
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160 samples per RTP packet,
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1 RTP packet per 4 frames */
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uint32_t samples_passed = (fn - last_fn) * 12 * 160 / (13 * 4);
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2016-06-03 11:29:29 +00:00
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/* round number of samples to the nearest multiple of
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GSM_RTP_DURATION */
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uint32_t r = samples_passed + GSM_RTP_DURATION / 2;
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r -= r % GSM_RTP_DURATION;
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return r;
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}
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return GSM_RTP_DURATION;
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}
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2013-07-29 07:42:23 +00:00
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/* allocate a msgb containing a osmo_phsap_prim + optional l2 data
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* in order to wrap femtobts header arround l2 data, there must be enough space
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* in front and behind data pointer */
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struct msgb *l1sap_msgb_alloc(unsigned int l2_len)
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{
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struct msgb *msg = msgb_alloc_headroom(512, 128, "l1sap_prim");
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if (!msg)
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return NULL;
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msg->l1h = msgb_put(msg, sizeof(struct osmo_phsap_prim));
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return msg;
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}
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2016-06-17 11:10:38 +00:00
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int add_l1sap_header(struct gsm_bts_trx *trx, struct msgb *rmsg,
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struct gsm_lchan *lchan, uint8_t chan_nr, uint32_t fn)
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{
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struct osmo_phsap_prim *l1sap;
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LOGP(DL1C, LOGL_DEBUG, "%s Rx -> RTP: %s\n",
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gsm_lchan_name(lchan), osmo_hexdump(rmsg->data, rmsg->len));
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rmsg->l2h = rmsg->data;
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msgb_push(rmsg, sizeof(*l1sap));
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rmsg->l1h = rmsg->data;
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l1sap = msgb_l1sap_prim(rmsg);
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osmo_prim_init(&l1sap->oph, SAP_GSM_PH, PRIM_TCH, PRIM_OP_INDICATION,
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rmsg);
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l1sap->u.tch.chan_nr = chan_nr;
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l1sap->u.tch.fn = fn;
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return l1sap_up(trx, l1sap);
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}
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2013-09-01 09:09:20 +00:00
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static int l1sap_tx_ciph_req(struct gsm_bts_trx *trx, uint8_t chan_nr,
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uint8_t downlink, uint8_t uplink)
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{
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struct osmo_phsap_prim l1sap_ciph;
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osmo_prim_init(&l1sap_ciph.oph, SAP_GSM_PH, PRIM_MPH_INFO,
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PRIM_OP_REQUEST, NULL);
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l1sap_ciph.u.info.type = PRIM_INFO_ACT_CIPH;
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l1sap_ciph.u.info.u.ciph_req.chan_nr = chan_nr;
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l1sap_ciph.u.info.u.ciph_req.downlink = downlink;
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l1sap_ciph.u.info.u.ciph_req.uplink = uplink;
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return l1sap_down(trx, &l1sap_ciph);
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}
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/* check if the message is a GSM48_MT_RR_CIPH_M_CMD, and if yes, enable
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* uni-directional de-cryption on the uplink. We need this ugly layering
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* violation as we have no way of passing down L3 metadata (RSL CIPHERING CMD)
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* to this point in L1 */
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static int check_for_ciph_cmd(struct msgb *msg, struct gsm_lchan *lchan,
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uint8_t chan_nr)
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{
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2016-01-25 14:43:03 +00:00
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uint8_t n_s;
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2013-09-01 09:09:20 +00:00
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/* only do this if we are in the right state */
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switch (lchan->ciph_state) {
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case LCHAN_CIPH_NONE:
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2013-07-02 09:04:11 +00:00
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case LCHAN_CIPH_RX_REQ:
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2013-09-01 09:09:20 +00:00
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break;
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default:
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return 0;
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}
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/* First byte (Address Field) of LAPDm header) */
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if (msg->data[0] != 0x03)
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return 0;
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/* First byte (protocol discriminator) of RR */
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if ((msg->data[3] & 0xF) != GSM48_PDISC_RR)
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return 0;
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/* 2nd byte (msg type) of RR */
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if ((msg->data[4] & 0x3F) != GSM48_MT_RR_CIPH_M_CMD)
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return 0;
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2016-01-25 14:43:03 +00:00
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/* Remember N(S) + 1 to find the first ciphered frame */
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n_s = (msg->data[1] >> 1) & 0x7;
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lchan->ciph_ns = (n_s + 1) % 8;
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2013-09-01 09:09:20 +00:00
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l1sap_tx_ciph_req(lchan->ts->trx, chan_nr, 0, 1);
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return 1;
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}
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2016-01-25 14:43:03 +00:00
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/* public helpers for the test */
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int bts_check_for_ciph_cmd(struct msgb *msg, struct gsm_lchan *lchan,
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uint8_t chan_nr)
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{
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return check_for_ciph_cmd(msg, lchan, chan_nr);
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}
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2013-07-29 07:45:22 +00:00
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struct gsmtap_inst *gsmtap = NULL;
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uint32_t gsmtap_sapi_mask = 0;
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uint8_t gsmtap_sapi_acch = 0;
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const struct value_string gsmtap_sapi_names[] = {
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{ GSMTAP_CHANNEL_BCCH, "BCCH" },
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{ GSMTAP_CHANNEL_CCCH, "CCCH" },
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{ GSMTAP_CHANNEL_RACH, "RACH" },
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{ GSMTAP_CHANNEL_AGCH, "AGCH" },
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{ GSMTAP_CHANNEL_PCH, "PCH" },
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{ GSMTAP_CHANNEL_SDCCH, "SDCCH" },
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{ GSMTAP_CHANNEL_TCH_F, "TCH/F" },
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{ GSMTAP_CHANNEL_TCH_H, "TCH/H" },
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{ GSMTAP_CHANNEL_PACCH, "PACCH" },
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{ GSMTAP_CHANNEL_PDCH, "PDTCH" },
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{ GSMTAP_CHANNEL_PTCCH, "PTCCH" },
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{ GSMTAP_CHANNEL_CBCH51,"CBCH" },
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{ GSMTAP_CHANNEL_ACCH, "SACCH" },
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{ 0, NULL }
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};
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/* send primitive as gsmtap */
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static int gsmtap_ph_data(struct osmo_phsap_prim *l1sap, uint8_t *chan_type,
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uint8_t *tn, uint8_t *ss, uint32_t *fn, uint8_t **data, int *len)
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{
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struct msgb *msg = l1sap->oph.msg;
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uint8_t chan_nr, link_id;
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*data = msg->data + sizeof(struct osmo_phsap_prim);
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*len = msg->len - sizeof(struct osmo_phsap_prim);
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*fn = l1sap->u.data.fn;
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*tn = L1SAP_CHAN2TS(l1sap->u.data.chan_nr);
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chan_nr = l1sap->u.data.chan_nr;
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link_id = l1sap->u.data.link_id;
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if (L1SAP_IS_CHAN_TCHF(chan_nr)) {
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*chan_type = GSMTAP_CHANNEL_TCH_F;
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} else if (L1SAP_IS_CHAN_TCHH(chan_nr)) {
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*ss = L1SAP_CHAN2SS_TCHH(chan_nr);
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*chan_type = GSMTAP_CHANNEL_TCH_H;
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} else if (L1SAP_IS_CHAN_SDCCH4(chan_nr)) {
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*ss = L1SAP_CHAN2SS_SDCCH4(chan_nr);
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*chan_type = GSMTAP_CHANNEL_SDCCH;
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} else if (L1SAP_IS_CHAN_SDCCH8(chan_nr)) {
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*ss = L1SAP_CHAN2SS_SDCCH8(chan_nr);
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*chan_type = GSMTAP_CHANNEL_SDCCH;
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} else if (L1SAP_IS_CHAN_BCCH(chan_nr)) {
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*chan_type = GSMTAP_CHANNEL_BCCH;
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} else if (L1SAP_IS_CHAN_AGCH_PCH(chan_nr)) {
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#warning Set BS_AG_BLKS_RES
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/* The sapi depends on DSP configuration, not
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* on the actual SYSTEM INFORMATION 3. */
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if (L1SAP_FN2CCCHBLOCK(*fn) >= 1)
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*chan_type = GSMTAP_CHANNEL_PCH;
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else
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*chan_type = GSMTAP_CHANNEL_AGCH;
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}
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if (L1SAP_IS_LINK_SACCH(link_id))
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*chan_type |= GSMTAP_CHANNEL_ACCH;
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return 0;
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}
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static int gsmtap_pdch(struct osmo_phsap_prim *l1sap, uint8_t *chan_type,
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uint8_t *tn, uint8_t *ss, uint32_t *fn, uint8_t **data, int *len)
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{
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struct msgb *msg = l1sap->oph.msg;
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*data = msg->data + sizeof(struct osmo_phsap_prim);
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*len = msg->len - sizeof(struct osmo_phsap_prim);
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*fn = l1sap->u.data.fn;
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*tn = L1SAP_CHAN2TS(l1sap->u.data.chan_nr);
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if (L1SAP_IS_PTCCH(*fn)) {
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*chan_type = GSMTAP_CHANNEL_PTCCH;
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*ss = L1SAP_FN2PTCCHBLOCK(*fn);
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if (l1sap->oph.primitive
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== PRIM_OP_INDICATION) {
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if ((*data[0]) == 7)
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return -EINVAL;
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(*data)++;
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(*len)--;
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}
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} else
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*chan_type = GSMTAP_CHANNEL_PACCH;
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return 0;
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}
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static int gsmtap_ph_rach(struct osmo_phsap_prim *l1sap, uint8_t *chan_type,
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uint8_t *tn, uint8_t *ss, uint32_t *fn, uint8_t **data, int *len)
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{
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uint8_t chan_nr;
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*chan_type = GSMTAP_CHANNEL_RACH;
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*fn = l1sap->u.rach_ind.fn;
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*tn = L1SAP_CHAN2TS(l1sap->u.rach_ind.chan_nr);
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chan_nr = l1sap->u.rach_ind.chan_nr;
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if (L1SAP_IS_CHAN_TCHH(chan_nr))
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*ss = L1SAP_CHAN2SS_TCHH(chan_nr);
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else if (L1SAP_IS_CHAN_SDCCH4(chan_nr))
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*ss = L1SAP_CHAN2SS_SDCCH4(chan_nr);
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else if (L1SAP_IS_CHAN_SDCCH8(chan_nr))
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*ss = L1SAP_CHAN2SS_SDCCH8(chan_nr);
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2016-08-17 10:57:31 +00:00
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*data = (uint8_t *)&l1sap->u.rach_ind.ra;
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2013-07-29 07:45:22 +00:00
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*len = 1;
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return 0;
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}
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static int to_gsmtap(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap)
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{
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uint8_t *data;
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int len;
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|
|
uint8_t chan_type = 0, tn = 0, ss = 0;
|
|
|
|
uint32_t fn;
|
|
|
|
uint16_t uplink = GSMTAP_ARFCN_F_UPLINK;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
if (!gsmtap)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
switch (OSMO_PRIM_HDR(&l1sap->oph)) {
|
|
|
|
case OSMO_PRIM(PRIM_PH_DATA, PRIM_OP_REQUEST):
|
|
|
|
uplink = 0;
|
|
|
|
/* fall through */
|
|
|
|
case OSMO_PRIM(PRIM_PH_DATA, PRIM_OP_INDICATION):
|
2016-07-27 13:52:55 +00:00
|
|
|
if (ts_is_pdch(&trx->ts[tn]))
|
2013-07-29 07:45:22 +00:00
|
|
|
rc = gsmtap_pdch(l1sap, &chan_type, &tn, &ss, &fn, &data,
|
|
|
|
&len);
|
|
|
|
else
|
|
|
|
rc = gsmtap_ph_data(l1sap, &chan_type, &tn, &ss, &fn,
|
|
|
|
&data, &len);
|
|
|
|
break;
|
|
|
|
case OSMO_PRIM(PRIM_PH_RACH, PRIM_OP_INDICATION):
|
|
|
|
rc = gsmtap_ph_rach(l1sap, &chan_type, &tn, &ss, &fn, &data,
|
|
|
|
&len);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
rc = -ENOTSUP;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
|
|
|
|
if (len == 0)
|
|
|
|
return 0;
|
|
|
|
if ((chan_type & GSMTAP_CHANNEL_ACCH)) {
|
|
|
|
if (!gsmtap_sapi_acch)
|
|
|
|
return 0;
|
|
|
|
} else {
|
|
|
|
if (!((1 << (chan_type & 31)) & gsmtap_sapi_mask))
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
gsmtap_send(gsmtap, trx->arfcn | uplink, tn, chan_type, ss, fn, 0, 0,
|
|
|
|
data, len);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-08-31 17:49:12 +00:00
|
|
|
/* time information received from bts model */
|
2013-07-08 16:34:14 +00:00
|
|
|
static int l1sap_info_time_ind(struct gsm_bts *bts,
|
2013-08-31 17:49:12 +00:00
|
|
|
struct osmo_phsap_prim *l1sap,
|
|
|
|
struct info_time_ind_param *info_time_ind)
|
|
|
|
{
|
2013-07-08 16:34:14 +00:00
|
|
|
struct gsm_bts_trx *trx;
|
2013-08-31 17:49:12 +00:00
|
|
|
struct gsm_bts_role_bts *btsb = bts->role;
|
|
|
|
|
2014-08-27 17:57:51 +00:00
|
|
|
int frames_expired = info_time_ind->fn - btsb->gsm_time.fn;
|
|
|
|
|
2013-08-31 17:49:12 +00:00
|
|
|
DEBUGP(DL1P, "MPH_INFO time ind %u\n", info_time_ind->fn);
|
|
|
|
|
|
|
|
/* Update our data structures with the current GSM time */
|
|
|
|
gsm_fn2gsmtime(&btsb->gsm_time, info_time_ind->fn);
|
|
|
|
|
|
|
|
/* Update time on PCU interface */
|
|
|
|
pcu_tx_time_ind(info_time_ind->fn);
|
|
|
|
|
|
|
|
/* check if the measurement period of some lchan has ended
|
|
|
|
* and pre-compute the respective measurement */
|
2013-07-08 16:34:14 +00:00
|
|
|
llist_for_each_entry(trx, &bts->trx_list, list)
|
|
|
|
trx_meas_check_compute(trx, info_time_ind->fn - 1);
|
2013-08-31 17:49:12 +00:00
|
|
|
|
2014-08-27 17:57:51 +00:00
|
|
|
/* increment number of RACH slots that have passed by since the
|
|
|
|
* last time indication */
|
|
|
|
if (trx == bts->c0) {
|
|
|
|
unsigned int num_rach_per_frame;
|
|
|
|
/* 27 / 51 taken from TS 05.01 Figure 3 */
|
|
|
|
if (bts->c0->ts[0].pchan == GSM_PCHAN_CCCH_SDCCH4)
|
|
|
|
num_rach_per_frame = 27;
|
|
|
|
else
|
|
|
|
num_rach_per_frame = 51;
|
|
|
|
|
|
|
|
btsb->load.rach.total += frames_expired * num_rach_per_frame;
|
|
|
|
}
|
2013-08-31 17:49:12 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-08-31 18:30:40 +00:00
|
|
|
/* measurement information received from bts model */
|
|
|
|
static int l1sap_info_meas_ind(struct gsm_bts_trx *trx,
|
|
|
|
struct osmo_phsap_prim *l1sap,
|
|
|
|
struct info_meas_ind_param *info_meas_ind)
|
|
|
|
{
|
|
|
|
struct bts_ul_meas ulm;
|
|
|
|
struct gsm_lchan *lchan;
|
|
|
|
|
2016-08-22 20:58:10 +00:00
|
|
|
DEBUGP(DL1P, "MPH_INFO meas ind chan_nr=0x%02x\n",
|
2013-08-31 18:30:40 +00:00
|
|
|
info_meas_ind->chan_nr);
|
|
|
|
|
2015-12-05 10:54:08 +00:00
|
|
|
lchan = get_active_lchan_by_chan_nr(trx, info_meas_ind->chan_nr);
|
|
|
|
if (!lchan)
|
|
|
|
return 0;
|
2013-08-31 18:30:40 +00:00
|
|
|
|
|
|
|
/* in the GPRS case we are not interested in measurement
|
|
|
|
* processing. The PCU will take care of it */
|
|
|
|
if (lchan->type == GSM_LCHAN_PDTCH)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
memset(&ulm, 0, sizeof(ulm));
|
|
|
|
ulm.ta_offs_qbits = info_meas_ind->ta_offs_qbits;
|
|
|
|
ulm.ber10k = info_meas_ind->ber10k;
|
|
|
|
ulm.inv_rssi = info_meas_ind->inv_rssi;
|
|
|
|
|
|
|
|
lchan_new_ul_meas(lchan, &ulm);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-08-31 17:49:12 +00:00
|
|
|
/* any L1 MPH_INFO indication prim recevied from bts model */
|
|
|
|
static int l1sap_mph_info_ind(struct gsm_bts_trx *trx,
|
|
|
|
struct osmo_phsap_prim *l1sap, struct mph_info_param *info)
|
|
|
|
{
|
|
|
|
int rc = 0;
|
|
|
|
|
|
|
|
switch (info->type) {
|
|
|
|
case PRIM_INFO_TIME:
|
2016-01-20 18:02:51 +00:00
|
|
|
if (trx != trx->bts->c0) {
|
|
|
|
LOGP(DL1P, LOGL_NOTICE, "BTS model is sending us "
|
|
|
|
"PRIM_INFO_TIME for TRX %u, please fix it\n",
|
|
|
|
trx->nr);
|
|
|
|
rc = -1;
|
|
|
|
} else
|
|
|
|
rc = l1sap_info_time_ind(trx->bts, l1sap,
|
|
|
|
&info->u.time_ind);
|
2013-08-31 17:49:12 +00:00
|
|
|
break;
|
2013-08-31 18:30:40 +00:00
|
|
|
case PRIM_INFO_MEAS:
|
|
|
|
rc = l1sap_info_meas_ind(trx, l1sap, &info->u.meas_ind);
|
|
|
|
break;
|
2013-08-31 17:49:12 +00:00
|
|
|
default:
|
|
|
|
LOGP(DL1P, LOGL_NOTICE, "unknown MPH_INFO ind type %d\n",
|
|
|
|
info->type);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2013-09-01 07:19:45 +00:00
|
|
|
/* activation confirm received from bts model */
|
|
|
|
static int l1sap_info_act_cnf(struct gsm_bts_trx *trx,
|
|
|
|
struct osmo_phsap_prim *l1sap,
|
|
|
|
struct info_act_cnf_param *info_act_cnf)
|
|
|
|
{
|
|
|
|
struct gsm_lchan *lchan;
|
|
|
|
|
2016-07-24 13:08:29 +00:00
|
|
|
LOGP(DL1P, LOGL_INFO, "activate confirm chan_nr=0x%02x trx=%d\n",
|
2013-09-01 07:19:45 +00:00
|
|
|
info_act_cnf->chan_nr, trx->nr);
|
|
|
|
|
2015-12-05 10:54:08 +00:00
|
|
|
lchan = get_lchan_by_chan_nr(trx, info_act_cnf->chan_nr);
|
2013-09-01 07:19:45 +00:00
|
|
|
|
2016-08-22 16:23:03 +00:00
|
|
|
rsl_tx_chan_act_acknack(lchan, info_act_cnf->cause);
|
2013-09-01 07:19:45 +00:00
|
|
|
|
2016-06-16 15:32:32 +00:00
|
|
|
/* During PDCH ACT, this is where we know that the PCU is done
|
|
|
|
* activating a PDCH, and PDCH switchover is complete. See
|
|
|
|
* rsl_rx_dyn_pdch() */
|
2016-07-16 20:29:28 +00:00
|
|
|
if (lchan->ts->pchan == GSM_PCHAN_TCH_F_PDCH
|
|
|
|
&& (lchan->ts->flags & TS_F_PDCH_ACT_PENDING))
|
|
|
|
ipacc_dyn_pdch_complete(lchan->ts,
|
|
|
|
info_act_cnf->cause? -EIO : 0);
|
2016-06-16 15:32:32 +00:00
|
|
|
|
2013-09-01 07:19:45 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* activation confirm received from bts model */
|
|
|
|
static int l1sap_info_rel_cnf(struct gsm_bts_trx *trx,
|
|
|
|
struct osmo_phsap_prim *l1sap,
|
|
|
|
struct info_act_cnf_param *info_act_cnf)
|
|
|
|
{
|
|
|
|
struct gsm_lchan *lchan;
|
|
|
|
|
2016-08-22 20:58:10 +00:00
|
|
|
LOGP(DL1P, LOGL_INFO, "deactivate confirm chan_nr=0x%02x trx=%d\n",
|
2013-09-01 07:19:45 +00:00
|
|
|
info_act_cnf->chan_nr, trx->nr);
|
|
|
|
|
2015-12-05 10:54:08 +00:00
|
|
|
lchan = get_lchan_by_chan_nr(trx, info_act_cnf->chan_nr);
|
2013-09-01 07:19:45 +00:00
|
|
|
|
|
|
|
rsl_tx_rf_rel_ack(lchan);
|
|
|
|
|
2016-06-16 15:32:32 +00:00
|
|
|
/* During PDCH DEACT, this marks the deactivation of the PDTCH as
|
|
|
|
* requested by the PCU. Next up, we disconnect the TS completely and
|
2016-07-26 13:22:58 +00:00
|
|
|
* call back to cb_ts_disconnected(). See rsl_rx_dyn_pdch(). */
|
2016-07-16 20:29:28 +00:00
|
|
|
if (lchan->ts->pchan == GSM_PCHAN_TCH_F_PDCH
|
|
|
|
&& (lchan->ts->flags & TS_F_PDCH_DEACT_PENDING))
|
2016-06-16 15:32:32 +00:00
|
|
|
bts_model_ts_disconnect(lchan->ts);
|
|
|
|
|
2013-09-01 07:19:45 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* any L1 MPH_INFO confirm prim recevied from bts model */
|
|
|
|
static int l1sap_mph_info_cnf(struct gsm_bts_trx *trx,
|
|
|
|
struct osmo_phsap_prim *l1sap, struct mph_info_param *info)
|
|
|
|
{
|
|
|
|
int rc = 0;
|
|
|
|
|
|
|
|
switch (info->type) {
|
|
|
|
case PRIM_INFO_ACTIVATE:
|
|
|
|
rc = l1sap_info_act_cnf(trx, l1sap, &info->u.act_cnf);
|
|
|
|
break;
|
|
|
|
case PRIM_INFO_DEACTIVATE:
|
|
|
|
rc = l1sap_info_rel_cnf(trx, l1sap, &info->u.act_cnf);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
LOGP(DL1P, LOGL_NOTICE, "unknown MPH_INFO cnf type %d\n",
|
|
|
|
info->type);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2016-07-27 13:32:46 +00:00
|
|
|
/* PH-RTS-IND prim received from bts model */
|
2013-07-29 07:42:23 +00:00
|
|
|
static int l1sap_ph_rts_ind(struct gsm_bts_trx *trx,
|
|
|
|
struct osmo_phsap_prim *l1sap, struct ph_data_param *rts_ind)
|
|
|
|
{
|
|
|
|
struct msgb *msg = l1sap->oph.msg;
|
|
|
|
struct gsm_time g_time;
|
2013-09-01 09:09:20 +00:00
|
|
|
struct gsm_lchan *lchan;
|
2013-07-29 07:42:23 +00:00
|
|
|
uint8_t chan_nr, link_id;
|
2015-12-05 10:54:08 +00:00
|
|
|
uint8_t tn;
|
2013-07-29 07:42:23 +00:00
|
|
|
uint32_t fn;
|
|
|
|
uint8_t *p, *si;
|
2013-09-01 09:09:20 +00:00
|
|
|
struct lapdm_entity *le;
|
|
|
|
struct osmo_phsap_prim pp;
|
2016-10-03 15:37:45 +00:00
|
|
|
bool dtxd_facch = false;
|
2013-08-30 06:03:09 +00:00
|
|
|
int rc;
|
2013-07-29 07:42:23 +00:00
|
|
|
|
|
|
|
chan_nr = rts_ind->chan_nr;
|
|
|
|
link_id = rts_ind->link_id;
|
|
|
|
fn = rts_ind->fn;
|
|
|
|
tn = L1SAP_CHAN2TS(chan_nr);
|
|
|
|
|
|
|
|
gsm_fn2gsmtime(&g_time, fn);
|
|
|
|
|
|
|
|
DEBUGP(DL1P, "Rx PH-RTS.ind %02u/%02u/%02u chan_nr=%d link_id=%d\n",
|
|
|
|
g_time.t1, g_time.t2, g_time.t3, chan_nr, link_id);
|
|
|
|
|
2016-07-27 13:52:55 +00:00
|
|
|
if (ts_is_pdch(&trx->ts[tn])) {
|
2013-08-30 06:48:38 +00:00
|
|
|
if (L1SAP_IS_PTCCH(rts_ind->fn)) {
|
|
|
|
pcu_tx_rts_req(&trx->ts[tn], 1, fn, 1 /* ARFCN */,
|
|
|
|
L1SAP_FN2PTCCHBLOCK(fn));
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
pcu_tx_rts_req(&trx->ts[tn], 0, fn, 0 /* ARFCN */,
|
|
|
|
L1SAP_FN2MACBLOCK(fn));
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-07-29 07:42:23 +00:00
|
|
|
/* reuse PH-RTS.ind for PH-DATA.req */
|
|
|
|
if (!msg) {
|
|
|
|
LOGP(DL1P, LOGL_FATAL, "RTS without msg to be reused. Please "
|
|
|
|
"fix!\n");
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
msgb_trim(msg, sizeof(*l1sap));
|
|
|
|
osmo_prim_init(&l1sap->oph, SAP_GSM_PH, PRIM_PH_DATA, PRIM_OP_REQUEST,
|
|
|
|
msg);
|
|
|
|
msg->l2h = msg->l1h + sizeof(*l1sap);
|
|
|
|
|
|
|
|
if (L1SAP_IS_CHAN_BCCH(chan_nr)) {
|
|
|
|
p = msgb_put(msg, GSM_MACBLOCK_LEN);
|
|
|
|
/* get them from bts->si_buf[] */
|
|
|
|
si = bts_sysinfo_get(trx->bts, &g_time);
|
|
|
|
if (si)
|
|
|
|
memcpy(p, si, GSM_MACBLOCK_LEN);
|
|
|
|
else
|
|
|
|
memcpy(p, fill_frame, GSM_MACBLOCK_LEN);
|
2013-09-01 09:09:20 +00:00
|
|
|
} else if (!(chan_nr & 0x80)) { /* only TCH/F, TCH/H, SDCCH/4 and SDCCH/8 have C5 bit cleared */
|
2015-12-05 10:54:08 +00:00
|
|
|
lchan = get_active_lchan_by_chan_nr(trx, chan_nr);
|
|
|
|
if (!lchan)
|
|
|
|
return 0;
|
2013-09-01 09:09:20 +00:00
|
|
|
if (L1SAP_IS_LINK_SACCH(link_id)) {
|
|
|
|
p = msgb_put(msg, GSM_MACBLOCK_LEN);
|
|
|
|
/* L1-header, if not set/modified by layer 1 */
|
2014-08-07 06:32:30 +00:00
|
|
|
p[0] = lchan->ms_power_ctrl.current;
|
2013-09-01 09:09:20 +00:00
|
|
|
p[1] = lchan->rqd_ta;
|
|
|
|
le = &lchan->lapdm_ch.lapdm_acch;
|
2016-10-03 15:37:45 +00:00
|
|
|
} else {
|
|
|
|
if (lchan->ts->trx->bts->dtxd)
|
|
|
|
dtxd_facch = true;
|
2013-09-01 09:09:20 +00:00
|
|
|
le = &lchan->lapdm_ch.lapdm_dcch;
|
2016-10-03 15:37:45 +00:00
|
|
|
}
|
2013-09-01 09:09:20 +00:00
|
|
|
rc = lapdm_phsap_dequeue_prim(le, &pp);
|
|
|
|
if (rc < 0) {
|
|
|
|
if (L1SAP_IS_LINK_SACCH(link_id)) {
|
|
|
|
/* No SACCH data from LAPDM pending, send SACCH filling */
|
|
|
|
uint8_t *si = lchan_sacch_get(lchan);
|
|
|
|
if (si) {
|
|
|
|
/* The +2 is empty space where the DSP inserts the L1 hdr */
|
|
|
|
memcpy(p + 2, si, GSM_MACBLOCK_LEN - 2);
|
|
|
|
} else
|
|
|
|
memcpy(p + 2, fill_frame, GSM_MACBLOCK_LEN - 2);
|
|
|
|
} else if ((!L1SAP_IS_CHAN_TCHF(chan_nr) && !L1SAP_IS_CHAN_TCHH(chan_nr))
|
|
|
|
|| lchan->rsl_cmode == RSL_CMOD_SPD_SIGN) {
|
|
|
|
/* send fill frame only, if not TCH/x != Signalling, otherwise send empty frame */
|
|
|
|
p = msgb_put(msg, GSM_MACBLOCK_LEN);
|
|
|
|
memcpy(p, fill_frame, GSM_MACBLOCK_LEN);
|
|
|
|
} /* else the message remains empty, so TCH frames are sent */
|
|
|
|
} else {
|
|
|
|
/* The +2 is empty space where the DSP inserts the L1 hdr */
|
|
|
|
if (L1SAP_IS_LINK_SACCH(link_id))
|
|
|
|
memcpy(p + 2, pp.oph.msg->data + 2, GSM_MACBLOCK_LEN - 2);
|
|
|
|
else {
|
|
|
|
p = msgb_put(msg, GSM_MACBLOCK_LEN);
|
|
|
|
memcpy(p, pp.oph.msg->data, GSM_MACBLOCK_LEN);
|
|
|
|
/* check if it is a RR CIPH MODE CMD. if yes, enable RX ciphering */
|
|
|
|
check_for_ciph_cmd(pp.oph.msg, lchan, chan_nr);
|
2016-10-03 15:37:45 +00:00
|
|
|
if (dtxd_facch && lchan->tch.dtx.dl_amr_fsm)
|
|
|
|
osmo_fsm_inst_dispatch(lchan->tch.dtx.dl_amr_fsm,
|
|
|
|
E_FACCH,
|
|
|
|
(void *)lchan);
|
2013-09-01 09:09:20 +00:00
|
|
|
}
|
|
|
|
msgb_free(pp.oph.msg);
|
|
|
|
}
|
2013-08-30 06:03:09 +00:00
|
|
|
} else if (L1SAP_IS_CHAN_AGCH_PCH(chan_nr)) {
|
|
|
|
p = msgb_put(msg, GSM_MACBLOCK_LEN);
|
2014-08-27 17:29:35 +00:00
|
|
|
#warning "TODO: Yet another assumption that BS_AG_BLKS_RES=1"
|
2013-08-30 06:03:09 +00:00
|
|
|
/* if CCCH block is 0, it is AGCH */
|
|
|
|
rc = bts_ccch_copy_msg(trx->bts, p, &g_time,
|
|
|
|
(L1SAP_FN2CCCHBLOCK(fn) < 1));
|
|
|
|
if (rc <= 0)
|
|
|
|
memcpy(p, fill_frame, GSM_MACBLOCK_LEN);
|
2013-07-29 07:42:23 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
DEBUGP(DL1P, "Tx PH-DATA.req %02u/%02u/%02u chan_nr=%d link_id=%d\n",
|
|
|
|
g_time.t1, g_time.t2, g_time.t3, chan_nr, link_id);
|
|
|
|
|
|
|
|
l1sap_down(trx, l1sap);
|
|
|
|
|
|
|
|
/* don't free, because we forwarded data */
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2013-08-30 05:46:30 +00:00
|
|
|
static int check_acc_delay(struct ph_rach_ind_param *rach_ind,
|
|
|
|
struct gsm_bts_role_bts *btsb, uint8_t *acc_delay)
|
|
|
|
{
|
|
|
|
*acc_delay = rach_ind->acc_delay;
|
|
|
|
return *acc_delay <= btsb->max_ta;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* special case where handover RACH is detected */
|
|
|
|
static int l1sap_handover_rach(struct gsm_bts_trx *trx,
|
|
|
|
struct osmo_phsap_prim *l1sap, struct ph_rach_ind_param *rach_ind)
|
|
|
|
{
|
|
|
|
struct gsm_lchan *lchan;
|
|
|
|
|
2015-12-05 10:54:08 +00:00
|
|
|
lchan = get_lchan_by_chan_nr(trx, rach_ind->chan_nr);
|
2013-08-30 05:46:30 +00:00
|
|
|
|
|
|
|
handover_rach(lchan, rach_ind->ra, rach_ind->acc_delay);
|
|
|
|
|
|
|
|
/* must return 0, so in case of msg at l1sap, it will be freed */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-09-01 08:08:15 +00:00
|
|
|
/* TCH-RTS-IND prim recevied from bts model */
|
|
|
|
static int l1sap_tch_rts_ind(struct gsm_bts_trx *trx,
|
|
|
|
struct osmo_phsap_prim *l1sap, struct ph_tch_param *rts_ind)
|
|
|
|
{
|
|
|
|
struct msgb *resp_msg;
|
|
|
|
struct osmo_phsap_prim *resp_l1sap, empty_l1sap;
|
|
|
|
struct gsm_time g_time;
|
|
|
|
struct gsm_lchan *lchan;
|
2016-09-17 12:15:03 +00:00
|
|
|
uint8_t chan_nr, marker = 0;
|
2013-09-01 08:08:15 +00:00
|
|
|
uint32_t fn;
|
|
|
|
|
|
|
|
chan_nr = rts_ind->chan_nr;
|
|
|
|
fn = rts_ind->fn;
|
|
|
|
|
|
|
|
gsm_fn2gsmtime(&g_time, fn);
|
|
|
|
|
|
|
|
DEBUGP(DL1P, "Rx TCH-RTS.ind %02u/%02u/%02u chan_nr=%d\n",
|
|
|
|
g_time.t1, g_time.t2, g_time.t3, chan_nr);
|
|
|
|
|
2015-12-05 10:54:08 +00:00
|
|
|
lchan = get_active_lchan_by_chan_nr(trx, chan_nr);
|
2015-12-05 14:57:09 +00:00
|
|
|
if (!lchan)
|
2015-12-05 10:54:08 +00:00
|
|
|
return 0;
|
2013-09-01 08:08:15 +00:00
|
|
|
|
|
|
|
if (!lchan->loopback && lchan->abis_ip.rtp_socket) {
|
|
|
|
osmo_rtp_socket_poll(lchan->abis_ip.rtp_socket);
|
|
|
|
/* FIXME: we _assume_ that we never miss TDMA
|
|
|
|
* frames and that we always get to this point
|
|
|
|
* for every to-be-transmitted voice frame. A
|
|
|
|
* better solution would be to compute
|
|
|
|
* rx_user_ts based on how many TDMA frames have
|
|
|
|
* elapsed since the last call */
|
|
|
|
lchan->abis_ip.rtp_socket->rx_user_ts += GSM_RTP_DURATION;
|
|
|
|
}
|
|
|
|
/* get a msgb from the dl_tx_queue */
|
|
|
|
resp_msg = msgb_dequeue(&lchan->dl_tch_queue);
|
|
|
|
if (!resp_msg) {
|
|
|
|
LOGP(DL1P, LOGL_DEBUG, "%s DL TCH Tx queue underrun\n",
|
|
|
|
gsm_lchan_name(lchan));
|
|
|
|
resp_l1sap = &empty_l1sap;
|
|
|
|
} else {
|
2016-09-17 12:15:03 +00:00
|
|
|
/* Obtain RTP header Marker bit from control buffer */
|
|
|
|
marker = rtpmsg_marker_bit(resp_msg);
|
|
|
|
|
2013-09-01 08:08:15 +00:00
|
|
|
resp_msg->l2h = resp_msg->data;
|
|
|
|
msgb_push(resp_msg, sizeof(*resp_l1sap));
|
|
|
|
resp_msg->l1h = resp_msg->data;
|
|
|
|
resp_l1sap = msgb_l1sap_prim(resp_msg);
|
|
|
|
}
|
|
|
|
|
|
|
|
memset(resp_l1sap, 0, sizeof(*resp_l1sap));
|
|
|
|
osmo_prim_init(&resp_l1sap->oph, SAP_GSM_PH, PRIM_TCH, PRIM_OP_REQUEST,
|
|
|
|
resp_msg);
|
|
|
|
resp_l1sap->u.tch.chan_nr = chan_nr;
|
|
|
|
resp_l1sap->u.tch.fn = fn;
|
2016-09-17 12:15:03 +00:00
|
|
|
resp_l1sap->u.tch.marker = marker;
|
2013-09-01 08:08:15 +00:00
|
|
|
|
|
|
|
DEBUGP(DL1P, "Tx TCH.req %02u/%02u/%02u chan_nr=%d\n",
|
|
|
|
g_time.t1, g_time.t2, g_time.t3, chan_nr);
|
|
|
|
|
|
|
|
l1sap_down(trx, resp_l1sap);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-09-01 09:09:20 +00:00
|
|
|
/* process radio link timeout counter S */
|
|
|
|
static void radio_link_timeout(struct gsm_lchan *lchan, int bad_frame)
|
|
|
|
{
|
|
|
|
struct gsm_bts_role_bts *btsb = lchan->ts->trx->bts->role;
|
|
|
|
|
|
|
|
/* if link loss criterion already reached */
|
|
|
|
if (lchan->s == 0) {
|
|
|
|
DEBUGP(DMEAS, "%s radio link counter S already 0.\n",
|
|
|
|
gsm_lchan_name(lchan));
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (bad_frame) {
|
|
|
|
/* count down radio link counter S */
|
|
|
|
lchan->s--;
|
|
|
|
DEBUGP(DMEAS, "%s counting down radio link counter S=%d\n",
|
|
|
|
gsm_lchan_name(lchan), lchan->s);
|
|
|
|
if (lchan->s == 0)
|
|
|
|
rsl_tx_conn_fail(lchan, RSL_ERR_RADIO_LINK_FAIL);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (lchan->s < btsb->radio_link_timeout) {
|
|
|
|
/* count up radio link counter S */
|
|
|
|
lchan->s += 2;
|
|
|
|
if (lchan->s > btsb->radio_link_timeout)
|
|
|
|
lchan->s = btsb->radio_link_timeout;
|
|
|
|
DEBUGP(DMEAS, "%s counting up radio link counter S=%d\n",
|
|
|
|
gsm_lchan_name(lchan), lchan->s);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-08-27 20:13:18 +00:00
|
|
|
static inline int check_for_first_ciphrd(struct gsm_lchan *lchan,
|
|
|
|
uint8_t *data, int len)
|
|
|
|
{
|
|
|
|
uint8_t n_s;
|
|
|
|
|
|
|
|
/* if this is the first valid message after enabling Rx
|
|
|
|
* decryption, we have to enable Tx encryption */
|
|
|
|
if (lchan->ciph_state != LCHAN_CIPH_RX_CONF)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* HACK: check if it's an I frame, in order to
|
|
|
|
* ignore some still buffered/queued UI frames received
|
|
|
|
* before decryption was enabled */
|
|
|
|
if (data[0] != 0x01)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if ((data[1] & 0x01) != 0)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
n_s = data[1] >> 5;
|
|
|
|
if (lchan->ciph_ns != n_s)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* public helper for the test */
|
|
|
|
int bts_check_for_first_ciphrd(struct gsm_lchan *lchan,
|
|
|
|
uint8_t *data, int len)
|
|
|
|
{
|
|
|
|
return check_for_first_ciphrd(lchan, data, len);
|
|
|
|
}
|
|
|
|
|
2013-08-30 06:48:38 +00:00
|
|
|
/* DATA received from bts model */
|
|
|
|
static int l1sap_ph_data_ind(struct gsm_bts_trx *trx,
|
|
|
|
struct osmo_phsap_prim *l1sap, struct ph_data_param *data_ind)
|
|
|
|
{
|
|
|
|
struct msgb *msg = l1sap->oph.msg;
|
|
|
|
struct gsm_time g_time;
|
2013-09-01 09:09:20 +00:00
|
|
|
struct gsm_lchan *lchan;
|
|
|
|
struct lapdm_entity *le;
|
2013-08-30 06:48:38 +00:00
|
|
|
uint8_t *data = msg->l2h;
|
|
|
|
int len = msgb_l2len(msg);
|
|
|
|
uint8_t chan_nr, link_id;
|
2015-12-05 10:54:08 +00:00
|
|
|
uint8_t tn;
|
2013-08-30 06:48:38 +00:00
|
|
|
uint32_t fn;
|
|
|
|
int8_t rssi;
|
2016-02-18 16:48:07 +00:00
|
|
|
enum osmo_ph_pres_info_type pr_info = data_ind->pdch_presence_info;
|
2013-08-30 06:48:38 +00:00
|
|
|
|
|
|
|
rssi = data_ind->rssi;
|
|
|
|
chan_nr = data_ind->chan_nr;
|
|
|
|
link_id = data_ind->link_id;
|
|
|
|
fn = data_ind->fn;
|
|
|
|
tn = L1SAP_CHAN2TS(chan_nr);
|
|
|
|
|
|
|
|
gsm_fn2gsmtime(&g_time, fn);
|
|
|
|
|
|
|
|
DEBUGP(DL1P, "Rx PH-DATA.ind %02u/%02u/%02u chan_nr=%d link_id=%d\n",
|
|
|
|
g_time.t1, g_time.t2, g_time.t3, chan_nr, link_id);
|
|
|
|
|
2016-07-27 13:52:55 +00:00
|
|
|
if (ts_is_pdch(&trx->ts[tn])) {
|
2013-08-30 06:48:38 +00:00
|
|
|
if (len == 0)
|
|
|
|
return -EINVAL;
|
|
|
|
if (L1SAP_IS_PTCCH(fn)) {
|
|
|
|
pcu_tx_data_ind(&trx->ts[tn], 1, fn,
|
|
|
|
0 /* ARFCN */, L1SAP_FN2PTCCHBLOCK(fn),
|
2016-07-28 12:46:00 +00:00
|
|
|
data, len, rssi, data_ind->ber10k,
|
|
|
|
data_ind->ta_offs_qbits,
|
|
|
|
data_ind->lqual_cb);
|
2013-08-30 06:48:38 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/* drop incomplete UL block */
|
2016-02-18 16:48:07 +00:00
|
|
|
if (pr_info != PRES_INFO_BOTH)
|
2013-08-30 06:48:38 +00:00
|
|
|
return 0;
|
|
|
|
/* PDTCH / PACCH frame handling */
|
|
|
|
pcu_tx_data_ind(&trx->ts[tn], 0, fn, 0 /* ARFCN */,
|
2016-07-28 12:46:00 +00:00
|
|
|
L1SAP_FN2MACBLOCK(fn), data, len, rssi, data_ind->ber10k,
|
|
|
|
data_ind->ta_offs_qbits, data_ind->lqual_cb);
|
2013-08-30 06:48:38 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-12-05 10:54:08 +00:00
|
|
|
lchan = get_active_lchan_by_chan_nr(trx, chan_nr);
|
|
|
|
if (!lchan)
|
|
|
|
return 0;
|
2013-09-01 09:09:20 +00:00
|
|
|
|
|
|
|
/* bad frame */
|
|
|
|
if (len == 0) {
|
|
|
|
if (L1SAP_IS_LINK_SACCH(link_id))
|
|
|
|
radio_link_timeout(lchan, 1);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2014-04-04 12:11:33 +00:00
|
|
|
/* report first valid received frame to handover process */
|
|
|
|
if (lchan->ho.active == HANDOVER_WAIT_FRAME)
|
|
|
|
handover_frame(lchan);
|
|
|
|
|
2013-09-01 09:09:20 +00:00
|
|
|
if (L1SAP_IS_LINK_SACCH(link_id)) {
|
|
|
|
radio_link_timeout(lchan, 0);
|
|
|
|
le = &lchan->lapdm_ch.lapdm_acch;
|
|
|
|
/* save the SACCH L1 header in the lchan struct for RSL MEAS RES */
|
|
|
|
if (len < 2) {
|
|
|
|
LOGP(DL1P, LOGL_NOTICE, "SACCH with size %u<2 !?!\n",
|
|
|
|
len);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
/* Some brilliant engineer decided that the ordering of
|
|
|
|
* fields on the Um interface is different from the
|
|
|
|
* order of fields in RLS. See TS 04.04 (Chapter 7.2)
|
|
|
|
* vs. TS 08.58 (Chapter 9.3.10). */
|
|
|
|
lchan->meas.l1_info[0] = data[0] << 3;
|
|
|
|
lchan->meas.l1_info[0] |= ((data[0] >> 5) & 1) << 2;
|
|
|
|
lchan->meas.l1_info[1] = data[1];
|
|
|
|
lchan->meas.flags |= LC_UL_M_F_L1_VALID;
|
2015-09-06 10:33:16 +00:00
|
|
|
|
|
|
|
lchan_ms_pwr_ctrl(lchan, data[0] & 0x1f, data_ind->rssi);
|
2013-09-01 09:09:20 +00:00
|
|
|
} else
|
|
|
|
le = &lchan->lapdm_ch.lapdm_dcch;
|
|
|
|
|
2014-08-27 20:13:18 +00:00
|
|
|
if (check_for_first_ciphrd(lchan, data, len))
|
|
|
|
l1sap_tx_ciph_req(lchan->ts->trx, chan_nr, 1, 0);
|
2013-09-01 09:09:20 +00:00
|
|
|
|
|
|
|
/* SDCCH, SACCH and FACCH all go to LAPDm */
|
|
|
|
msgb_pull(msg, (msg->l2h - msg->data));
|
|
|
|
msg->l1h = NULL;
|
|
|
|
lapdm_phsap_up(&l1sap->oph, le);
|
|
|
|
|
|
|
|
/* don't free, because we forwarded data */
|
|
|
|
return 1;
|
2013-08-30 06:48:38 +00:00
|
|
|
}
|
|
|
|
|
2013-09-01 08:08:15 +00:00
|
|
|
/* TCH received from bts model */
|
|
|
|
static int l1sap_tch_ind(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap,
|
|
|
|
struct ph_tch_param *tch_ind)
|
|
|
|
{
|
|
|
|
struct msgb *msg = l1sap->oph.msg;
|
|
|
|
struct gsm_time g_time;
|
|
|
|
struct gsm_lchan *lchan;
|
2015-12-05 10:54:08 +00:00
|
|
|
uint8_t chan_nr;
|
2013-09-01 08:08:15 +00:00
|
|
|
uint32_t fn;
|
|
|
|
|
|
|
|
chan_nr = tch_ind->chan_nr;
|
|
|
|
fn = tch_ind->fn;
|
|
|
|
|
|
|
|
gsm_fn2gsmtime(&g_time, fn);
|
|
|
|
|
|
|
|
DEBUGP(DL1P, "Rx TCH.ind %02u/%02u/%02u chan_nr=%d\n",
|
|
|
|
g_time.t1, g_time.t2, g_time.t3, chan_nr);
|
|
|
|
|
2015-12-05 10:54:08 +00:00
|
|
|
lchan = get_active_lchan_by_chan_nr(trx, chan_nr);
|
|
|
|
if (!lchan)
|
|
|
|
return 0;
|
|
|
|
|
2013-09-01 08:08:15 +00:00
|
|
|
msgb_pull(msg, sizeof(*l1sap));
|
|
|
|
|
|
|
|
/* hand msg to RTP code for transmission */
|
|
|
|
if (lchan->abis_ip.rtp_socket)
|
2016-06-13 09:33:43 +00:00
|
|
|
osmo_rtp_send_frame_ext(lchan->abis_ip.rtp_socket,
|
|
|
|
msg->data, msg->len, fn_ms_adj(fn, lchan->tch.last_fn), lchan->rtp_tx_marker);
|
2013-09-01 08:08:15 +00:00
|
|
|
|
|
|
|
/* if loopback is enabled, also queue received RTP data */
|
|
|
|
if (lchan->loopback) {
|
|
|
|
struct msgb *tmp;
|
|
|
|
int count = 0;
|
|
|
|
|
2015-06-15 03:52:27 +00:00
|
|
|
/* make sure the queue doesn't get too long */
|
2013-09-01 08:08:15 +00:00
|
|
|
llist_for_each_entry(tmp, &lchan->dl_tch_queue, list)
|
2015-06-15 03:52:27 +00:00
|
|
|
count++;
|
2013-09-01 08:08:15 +00:00
|
|
|
while (count >= 1) {
|
|
|
|
tmp = msgb_dequeue(&lchan->dl_tch_queue);
|
|
|
|
msgb_free(tmp);
|
|
|
|
count--;
|
|
|
|
}
|
|
|
|
|
|
|
|
msgb_enqueue(&lchan->dl_tch_queue, msg);
|
|
|
|
}
|
2016-06-13 09:33:43 +00:00
|
|
|
|
|
|
|
lchan->rtp_tx_marker = false;
|
2016-06-03 11:29:29 +00:00
|
|
|
lchan->tch.last_fn = fn;
|
2013-09-01 08:08:15 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-08-30 05:46:30 +00:00
|
|
|
/* RACH received from bts model */
|
|
|
|
static int l1sap_ph_rach_ind(struct gsm_bts_trx *trx,
|
|
|
|
struct osmo_phsap_prim *l1sap, struct ph_rach_ind_param *rach_ind)
|
|
|
|
{
|
|
|
|
struct gsm_bts *bts = trx->bts;
|
|
|
|
struct gsm_bts_role_bts *btsb = bts->role;
|
|
|
|
struct lapdm_channel *lc;
|
|
|
|
uint8_t acc_delay;
|
|
|
|
|
|
|
|
DEBUGP(DL1P, "Rx PH-RA.ind");
|
|
|
|
|
2016-10-17 09:07:51 +00:00
|
|
|
lc = &trx->ts[0].lchan[CCCH_LCHAN].lapdm_ch;
|
2013-08-30 05:46:30 +00:00
|
|
|
|
|
|
|
/* check for under/overflow / sign */
|
|
|
|
if (!check_acc_delay(rach_ind, btsb, &acc_delay)) {
|
|
|
|
LOGP(DL1C, LOGL_INFO, "ignoring RACH request %u > max_ta(%u)\n",
|
|
|
|
acc_delay, btsb->max_ta);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* check for handover rach */
|
2014-08-27 16:31:39 +00:00
|
|
|
if (!L1SAP_IS_CHAN_RACH(rach_ind->chan_nr))
|
2013-08-30 05:46:30 +00:00
|
|
|
return l1sap_handover_rach(trx, l1sap, rach_ind);
|
|
|
|
|
|
|
|
/* check for packet access */
|
2016-08-17 10:57:31 +00:00
|
|
|
if ((trx == bts->c0 && L1SAP_IS_PACKET_RACH(rach_ind->ra)) ||
|
|
|
|
(trx == bts->c0 && rach_ind->is_11bit)) {
|
|
|
|
|
2013-08-30 05:46:30 +00:00
|
|
|
LOGP(DL1P, LOGL_INFO, "RACH for packet access\n");
|
|
|
|
pcu_tx_rach_ind(bts, rach_ind->acc_delay << 2,
|
2016-08-17 10:57:31 +00:00
|
|
|
rach_ind->ra, rach_ind->fn,
|
|
|
|
rach_ind->is_11bit, rach_ind->burst_type);
|
2013-08-30 05:46:30 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
LOGP(DL1P, LOGL_INFO, "RACH for RR access (toa=%d, ra=%d)\n",
|
|
|
|
rach_ind->acc_delay, rach_ind->ra);
|
|
|
|
lapdm_phsap_up(&l1sap->oph, &lc->lapdm_dcch);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2016-01-04 19:05:41 +00:00
|
|
|
/* any L1 prim received from bts model, takes ownership of the msgb */
|
2013-07-29 07:42:23 +00:00
|
|
|
int l1sap_up(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap)
|
|
|
|
{
|
|
|
|
struct msgb *msg = l1sap->oph.msg;
|
|
|
|
int rc = 0;
|
|
|
|
|
|
|
|
switch (OSMO_PRIM_HDR(&l1sap->oph)) {
|
2013-08-31 17:49:12 +00:00
|
|
|
case OSMO_PRIM(PRIM_MPH_INFO, PRIM_OP_INDICATION):
|
|
|
|
rc = l1sap_mph_info_ind(trx, l1sap, &l1sap->u.info);
|
|
|
|
break;
|
2013-09-01 07:19:45 +00:00
|
|
|
case OSMO_PRIM(PRIM_MPH_INFO, PRIM_OP_CONFIRM):
|
|
|
|
rc = l1sap_mph_info_cnf(trx, l1sap, &l1sap->u.info);
|
|
|
|
break;
|
2013-07-29 07:42:23 +00:00
|
|
|
case OSMO_PRIM(PRIM_PH_RTS, PRIM_OP_INDICATION):
|
|
|
|
rc = l1sap_ph_rts_ind(trx, l1sap, &l1sap->u.data);
|
|
|
|
break;
|
2013-09-01 08:08:15 +00:00
|
|
|
case OSMO_PRIM(PRIM_TCH_RTS, PRIM_OP_INDICATION):
|
|
|
|
rc = l1sap_tch_rts_ind(trx, l1sap, &l1sap->u.tch);
|
|
|
|
break;
|
2013-08-30 06:48:38 +00:00
|
|
|
case OSMO_PRIM(PRIM_PH_DATA, PRIM_OP_INDICATION):
|
2013-07-29 07:45:22 +00:00
|
|
|
to_gsmtap(trx, l1sap);
|
2013-08-30 06:48:38 +00:00
|
|
|
rc = l1sap_ph_data_ind(trx, l1sap, &l1sap->u.data);
|
|
|
|
break;
|
2013-09-01 08:08:15 +00:00
|
|
|
case OSMO_PRIM(PRIM_TCH, PRIM_OP_INDICATION):
|
|
|
|
rc = l1sap_tch_ind(trx, l1sap, &l1sap->u.tch);
|
|
|
|
break;
|
2013-08-30 05:46:30 +00:00
|
|
|
case OSMO_PRIM(PRIM_PH_RACH, PRIM_OP_INDICATION):
|
2013-07-29 07:45:22 +00:00
|
|
|
to_gsmtap(trx, l1sap);
|
2013-08-30 05:46:30 +00:00
|
|
|
rc = l1sap_ph_rach_ind(trx, l1sap, &l1sap->u.rach_ind);
|
|
|
|
break;
|
2013-07-29 07:42:23 +00:00
|
|
|
default:
|
|
|
|
LOGP(DL1P, LOGL_NOTICE, "unknown prim %d op %d\n",
|
|
|
|
l1sap->oph.primitive, l1sap->oph.operation);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Special return value '1' means: do not free */
|
|
|
|
if (rc != 1)
|
|
|
|
msgb_free(msg);
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* any L1 prim sent to bts model */
|
|
|
|
static int l1sap_down(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap)
|
|
|
|
{
|
2013-07-29 07:45:22 +00:00
|
|
|
if (OSMO_PRIM_HDR(&l1sap->oph) ==
|
|
|
|
OSMO_PRIM(PRIM_PH_DATA, PRIM_OP_REQUEST))
|
|
|
|
to_gsmtap(trx, l1sap);
|
|
|
|
|
2013-07-29 07:42:23 +00:00
|
|
|
return bts_model_l1sap_down(trx, l1sap);
|
|
|
|
}
|
|
|
|
|
2013-08-30 06:48:38 +00:00
|
|
|
/* pcu (socket interface) sends us a data request primitive */
|
|
|
|
int l1sap_pdch_req(struct gsm_bts_trx_ts *ts, int is_ptcch, uint32_t fn,
|
|
|
|
uint16_t arfcn, uint8_t block_nr, uint8_t *data, uint8_t len)
|
|
|
|
{
|
|
|
|
struct msgb *msg;
|
|
|
|
struct osmo_phsap_prim *l1sap;
|
|
|
|
struct gsm_time g_time;
|
|
|
|
|
|
|
|
gsm_fn2gsmtime(&g_time, fn);
|
|
|
|
|
|
|
|
DEBUGP(DL1P, "TX packet data %02u/%02u/%02u is_ptcch=%d trx=%d ts=%d "
|
|
|
|
"block_nr=%d, arfcn=%d, len=%d\n", g_time.t1, g_time.t2,
|
|
|
|
g_time.t3, is_ptcch, ts->trx->nr, ts->nr, block_nr, arfcn, len);
|
|
|
|
|
|
|
|
msg = l1sap_msgb_alloc(len);
|
|
|
|
l1sap = msgb_l1sap_prim(msg);
|
|
|
|
osmo_prim_init(&l1sap->oph, SAP_GSM_PH, PRIM_PH_DATA, PRIM_OP_REQUEST,
|
|
|
|
msg);
|
|
|
|
l1sap->u.data.chan_nr = 0x08 | ts->nr;
|
|
|
|
l1sap->u.data.link_id = 0x00;
|
|
|
|
l1sap->u.data.fn = fn;
|
|
|
|
msg->l2h = msgb_put(msg, len);
|
|
|
|
memcpy(msg->l2h, data, len);
|
|
|
|
|
|
|
|
return l1sap_down(ts->trx, l1sap);
|
|
|
|
}
|
2013-09-01 07:19:45 +00:00
|
|
|
|
2013-09-01 08:08:15 +00:00
|
|
|
/*! \brief call-back function for incoming RTP */
|
|
|
|
void l1sap_rtp_rx_cb(struct osmo_rtp_socket *rs, const uint8_t *rtp_pl,
|
2016-10-21 17:53:34 +00:00
|
|
|
unsigned int rtp_pl_len, uint16_t seq_number,
|
|
|
|
uint32_t timestamp, bool marker)
|
2013-09-01 08:08:15 +00:00
|
|
|
{
|
|
|
|
struct gsm_lchan *lchan = rs->priv;
|
|
|
|
struct msgb *msg, *tmp;
|
|
|
|
struct osmo_phsap_prim *l1sap;
|
|
|
|
int count = 0;
|
|
|
|
|
|
|
|
msg = l1sap_msgb_alloc(rtp_pl_len);
|
|
|
|
if (!msg)
|
|
|
|
return;
|
|
|
|
memcpy(msgb_put(msg, rtp_pl_len), rtp_pl, rtp_pl_len);
|
|
|
|
msgb_pull(msg, sizeof(*l1sap));
|
|
|
|
|
2016-09-17 12:15:03 +00:00
|
|
|
/* Store RTP header Marker bit in control buffer */
|
|
|
|
rtpmsg_marker_bit(msg) = marker;
|
2013-09-01 08:08:15 +00:00
|
|
|
|
|
|
|
/* make sure the queue doesn't get too long */
|
|
|
|
llist_for_each_entry(tmp, &lchan->dl_tch_queue, list)
|
|
|
|
count++;
|
|
|
|
while (count >= 2) {
|
|
|
|
tmp = msgb_dequeue(&lchan->dl_tch_queue);
|
|
|
|
msgb_free(tmp);
|
|
|
|
count--;
|
|
|
|
}
|
|
|
|
|
|
|
|
msgb_enqueue(&lchan->dl_tch_queue, msg);
|
|
|
|
}
|
|
|
|
|
2013-09-01 07:19:45 +00:00
|
|
|
static int l1sap_chan_act_dact_modify(struct gsm_bts_trx *trx, uint8_t chan_nr,
|
|
|
|
enum osmo_mph_info_type type, uint8_t sacch_only)
|
|
|
|
{
|
|
|
|
struct osmo_phsap_prim l1sap;
|
|
|
|
|
2016-07-14 23:03:32 +00:00
|
|
|
/* The caller may pass a non-standard RSL_CHAN_OSMO_PDCH, which the L1
|
|
|
|
* doesn't understand. Use the normal TCH/F cbits instead. */
|
|
|
|
if ((chan_nr & RSL_CHAN_NR_MASK) == RSL_CHAN_OSMO_PDCH)
|
|
|
|
chan_nr = RSL_CHAN_Bm_ACCHs | (chan_nr & ~RSL_CHAN_NR_MASK);
|
|
|
|
|
2013-09-01 07:19:45 +00:00
|
|
|
memset(&l1sap, 0, sizeof(l1sap));
|
|
|
|
osmo_prim_init(&l1sap.oph, SAP_GSM_PH, PRIM_MPH_INFO, PRIM_OP_REQUEST,
|
|
|
|
NULL);
|
|
|
|
l1sap.u.info.type = type;
|
|
|
|
l1sap.u.info.u.act_req.chan_nr = chan_nr;
|
|
|
|
l1sap.u.info.u.act_req.sacch_only = sacch_only;
|
|
|
|
|
|
|
|
return l1sap_down(trx, &l1sap);
|
|
|
|
}
|
|
|
|
|
|
|
|
int l1sap_chan_act(struct gsm_bts_trx *trx, uint8_t chan_nr, struct tlv_parsed *tp)
|
|
|
|
{
|
|
|
|
struct gsm_bts_role_bts *btsb = trx->bts->role;
|
2015-12-05 10:54:08 +00:00
|
|
|
struct gsm_lchan *lchan = get_lchan_by_chan_nr(trx, chan_nr);
|
2013-09-01 07:19:45 +00:00
|
|
|
struct gsm48_chan_desc *cd;
|
|
|
|
int rc;
|
|
|
|
|
2016-07-24 13:08:29 +00:00
|
|
|
LOGP(DL1P, LOGL_INFO, "activating channel chan_nr=0x%02x trx=%d\n",
|
2013-09-01 07:19:45 +00:00
|
|
|
chan_nr, trx->nr);
|
|
|
|
|
2014-08-27 18:05:59 +00:00
|
|
|
/* osmo-pcu calls this without a valid 'tp' parameter, so we
|
|
|
|
* need to make sure ew don't crash here */
|
2013-09-01 07:19:45 +00:00
|
|
|
if (tp && TLVP_PRESENT(tp, GSM48_IE_CHANDESC_2) &&
|
|
|
|
TLVP_LEN(tp, GSM48_IE_CHANDESC_2) >= sizeof(*cd)) {
|
|
|
|
cd = (struct gsm48_chan_desc *)
|
|
|
|
TLVP_VAL(tp, GSM48_IE_CHANDESC_2);
|
|
|
|
|
|
|
|
/* our L1 only supports one global TSC for all channels
|
|
|
|
* one one TRX, so we need to make sure not to activate
|
|
|
|
* channels with a different TSC!! */
|
|
|
|
if (cd->h0.tsc != (lchan->ts->trx->bts->bsic & 7)) {
|
|
|
|
LOGP(DRSL, LOGL_ERROR, "lchan TSC %u != BSIC-TSC %u\n",
|
|
|
|
cd->h0.tsc, lchan->ts->trx->bts->bsic & 7);
|
|
|
|
return -RSL_ERR_SERV_OPT_UNIMPL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
lchan->sacch_deact = 0;
|
|
|
|
lchan->s = btsb->radio_link_timeout;
|
|
|
|
|
|
|
|
rc = l1sap_chan_act_dact_modify(trx, chan_nr, PRIM_INFO_ACTIVATE, 0);
|
|
|
|
if (rc)
|
|
|
|
return -RSL_ERR_EQUIPMENT_FAIL;
|
2016-10-03 15:37:45 +00:00
|
|
|
|
|
|
|
/* Init DTX DL FSM if necessary */
|
|
|
|
//FIXME: only do it for AMR TCH/*
|
|
|
|
osmo_fsm_register(&dtx_dl_amr_fsm);
|
|
|
|
lchan->tch.dtx.dl_amr_fsm = osmo_fsm_inst_alloc(&dtx_dl_amr_fsm,
|
|
|
|
tall_bts_ctx, lchan,
|
|
|
|
LOGL_DEBUG, lchan->name);
|
2013-09-01 07:19:45 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int l1sap_chan_rel(struct gsm_bts_trx *trx, uint8_t chan_nr)
|
|
|
|
{
|
2016-10-03 15:37:45 +00:00
|
|
|
struct gsm_lchan *lchan = get_lchan_by_chan_nr(trx, chan_nr);
|
2016-08-22 20:58:10 +00:00
|
|
|
LOGP(DL1P, LOGL_INFO, "deactivating channel chan_nr=0x%02x trx=%d\n",
|
2013-09-01 07:19:45 +00:00
|
|
|
chan_nr, trx->nr);
|
|
|
|
|
2016-10-03 15:37:45 +00:00
|
|
|
if (lchan->tch.dtx.dl_amr_fsm) {
|
|
|
|
osmo_fsm_inst_free(lchan->tch.dtx.dl_amr_fsm);
|
|
|
|
lchan->tch.dtx.dl_amr_fsm = NULL;
|
|
|
|
}
|
|
|
|
|
2013-09-01 07:19:45 +00:00
|
|
|
return l1sap_chan_act_dact_modify(trx, chan_nr, PRIM_INFO_DEACTIVATE,
|
|
|
|
0);
|
|
|
|
}
|
|
|
|
|
|
|
|
int l1sap_chan_deact_sacch(struct gsm_bts_trx *trx, uint8_t chan_nr)
|
|
|
|
{
|
2015-12-05 10:54:08 +00:00
|
|
|
struct gsm_lchan *lchan = get_lchan_by_chan_nr(trx, chan_nr);
|
2013-09-01 07:19:45 +00:00
|
|
|
|
2016-08-22 20:58:10 +00:00
|
|
|
LOGP(DL1P, LOGL_INFO, "deactivating sacch chan_nr=0x%02x trx=%d\n",
|
2013-09-01 07:19:45 +00:00
|
|
|
chan_nr, trx->nr);
|
|
|
|
|
|
|
|
lchan->sacch_deact = 1;
|
|
|
|
|
|
|
|
return l1sap_chan_act_dact_modify(trx, chan_nr, PRIM_INFO_DEACTIVATE,
|
|
|
|
1);
|
|
|
|
}
|
|
|
|
|
|
|
|
int l1sap_chan_modify(struct gsm_bts_trx *trx, uint8_t chan_nr)
|
|
|
|
{
|
2016-08-22 20:58:10 +00:00
|
|
|
LOGP(DL1P, LOGL_INFO, "modifying channel chan_nr=0x%02x trx=%d\n",
|
2013-09-01 07:19:45 +00:00
|
|
|
chan_nr, trx->nr);
|
|
|
|
|
|
|
|
return l1sap_chan_act_dact_modify(trx, chan_nr, PRIM_INFO_MODIFY, 0);
|
|
|
|
}
|