2018-02-19 16:17:28 +00:00
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/*
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* Copyright (C) 2013 by Holger Hans Peter Freyther
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* Copyright (C) 2018 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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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 <bts.h>
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#include <pdch.h>
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#include <decoding.h>
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#include <encoding.h>
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#include <gprs_rlcmac.h>
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#include <gprs_debug.h>
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2020-05-18 09:35:35 +00:00
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#include <coding_scheme.h>
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2018-02-19 16:17:28 +00:00
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#include <gprs_ms.h>
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#include <gprs_ms_storage.h>
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#include <pcu_l1_if.h>
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#include <rlc.h>
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#include <sba.h>
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#include <tbf.h>
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2019-09-25 15:47:02 +00:00
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#include <tbf_ul.h>
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2018-02-19 16:17:28 +00:00
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#include <cxx_linuxlist.h>
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extern "C" {
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2020-03-26 14:06:11 +00:00
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/msgb.h>
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2020-03-26 08:45:21 +00:00
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#include <osmocom/gsm/gsm48.h>
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2020-03-26 14:06:11 +00:00
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#include <osmocom/gsm/protocol/gsm_04_08.h>
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#include <osmocom/core/bitvec.h>
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#include <osmocom/core/gsmtap.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/core/utils.h>
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2020-03-26 14:14:01 +00:00
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2020-03-26 14:06:11 +00:00
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#include "coding_scheme.h"
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2020-03-26 14:14:01 +00:00
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#include "gsm_rlcmac.h"
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2018-02-19 16:17:28 +00:00
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}
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#include <errno.h>
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2019-10-05 14:57:14 +00:00
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#include <stdlib.h>
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2018-02-19 16:17:28 +00:00
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#include <arpa/inet.h>
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extern void *tall_pcu_ctx;
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static void get_rx_qual_meas(struct pcu_l1_meas *meas, uint8_t rx_qual_enc)
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{
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static const int16_t rx_qual_map[] = {
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0, /* 0,14 % */
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0, /* 0,28 % */
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1, /* 0,57 % */
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1, /* 1,13 % */
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2, /* 2,26 % */
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5, /* 4,53 % */
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9, /* 9,05 % */
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18, /* 18,10 % */
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};
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meas->set_ms_rx_qual(rx_qual_map[
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OSMO_MIN(rx_qual_enc, ARRAY_SIZE(rx_qual_map)-1)
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]);
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}
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static void get_meas(struct pcu_l1_meas *meas,
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const Packet_Resource_Request_t *qr)
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{
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unsigned i;
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meas->set_ms_c_value(qr->C_VALUE);
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if (qr->Exist_SIGN_VAR)
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meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */
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2020-02-23 09:11:28 +00:00
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for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->I_LEVEL_TN), ARRAY_SIZE(meas->ts)); i++)
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2018-02-19 16:17:28 +00:00
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{
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2020-02-23 09:11:28 +00:00
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if (qr->I_LEVEL_TN[i].Exist) {
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2018-02-19 16:17:28 +00:00
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LOGP(DRLCMAC, LOGL_INFO,
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"Packet resource request: i_level[%d] = %d\n",
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2020-02-23 09:11:28 +00:00
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i, qr->I_LEVEL_TN[i].I_LEVEL);
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meas->set_ms_i_level(i, -2 * qr->I_LEVEL_TN[i].I_LEVEL);
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2018-02-19 16:17:28 +00:00
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}
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}
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}
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static void get_meas(struct pcu_l1_meas *meas,
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const Channel_Quality_Report_t *qr)
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{
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unsigned i;
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get_rx_qual_meas(meas, qr->RXQUAL);
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meas->set_ms_c_value(qr->C_VALUE);
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meas->set_ms_sign_var((qr->SIGN_VAR + 2) / 4); /* SIGN_VAR * 0.25 dB */
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for (i = 0; i < OSMO_MIN(ARRAY_SIZE(qr->Slot), ARRAY_SIZE(meas->ts)); i++)
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{
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if (qr->Slot[i].Exist) {
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LOGP(DRLCMAC, LOGL_DEBUG,
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"Channel quality report: i_level[%d] = %d\n",
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i, qr->Slot[i].I_LEVEL_TN);
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meas->set_ms_i_level(i, -2 * qr->Slot[i].I_LEVEL_TN);
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}
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}
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}
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static inline void sched_ul_ass_or_rej(BTS *bts, gprs_rlcmac_bts *bts_data, struct gprs_rlcmac_dl_tbf *tbf)
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{
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2020-05-12 18:54:35 +00:00
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bts->do_rate_ctr_inc(CTR_CHANNEL_REQUEST_DESCRIPTION);
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2018-02-19 16:17:28 +00:00
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/* This call will register the new TBF with the MS on success */
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2020-05-12 17:27:16 +00:00
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gprs_rlcmac_ul_tbf *ul_tbf = tbf_alloc_ul(bts_data, tbf->ms(), tbf->trx->trx_no, tbf->tlli());
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2018-02-19 16:17:28 +00:00
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/* schedule uplink assignment or reject */
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if (ul_tbf) {
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LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we provide one:\n");
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TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS);
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} else {
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LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF in ack message, so we packet access reject:\n");
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TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS_REJ);
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}
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}
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void gprs_rlcmac_pdch::enable()
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{
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/* TODO: Check if there are still allocated resources.. */
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INIT_LLIST_HEAD(&paging_list);
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m_is_enabled = 1;
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}
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void gprs_rlcmac_pdch::disable()
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{
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/* TODO.. kick free_resources once we know the TRX/TS we are on */
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m_is_enabled = 0;
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}
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void gprs_rlcmac_pdch::free_resources()
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{
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struct gprs_rlcmac_paging *pag;
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/* we are not enabled. there should be no resources */
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if (!is_enabled())
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return;
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/* kick all TBF on slot */
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gprs_rlcmac_tbf::free_all(this);
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/* flush all pending paging messages */
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while ((pag = dequeue_paging()))
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talloc_free(pag);
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trx->bts->sba()->free_resources(this);
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}
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struct gprs_rlcmac_paging *gprs_rlcmac_pdch::dequeue_paging()
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{
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struct gprs_rlcmac_paging *pag;
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if (llist_empty(&paging_list))
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return NULL;
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pag = llist_entry(paging_list.next, struct gprs_rlcmac_paging, list);
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llist_del(&pag->list);
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return pag;
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}
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struct msgb *gprs_rlcmac_pdch::packet_paging_request()
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{
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struct gprs_rlcmac_paging *pag;
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2020-02-03 16:18:03 +00:00
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RlcMacDownlink_t *mac_control_block;
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bitvec *pag_vec;
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2018-02-19 16:17:28 +00:00
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struct msgb *msg;
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unsigned wp = 0, len;
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2020-02-03 16:18:03 +00:00
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int rc;
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2018-02-19 16:17:28 +00:00
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/* no paging, no message */
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pag = dequeue_paging();
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if (!pag)
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return NULL;
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LOGP(DRLCMAC, LOGL_DEBUG, "Scheduling paging\n");
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/* alloc message */
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msg = msgb_alloc(23, "pag ctrl block");
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if (!msg) {
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talloc_free(pag);
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return NULL;
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}
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2020-02-03 16:18:03 +00:00
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pag_vec = bitvec_alloc(23, tall_pcu_ctx);
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2018-02-19 16:17:28 +00:00
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if (!pag_vec) {
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msgb_free(msg);
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talloc_free(pag);
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return NULL;
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}
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wp = Encoding::write_packet_paging_request(pag_vec);
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/* loop until message is full */
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while (pag) {
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2020-03-26 08:45:21 +00:00
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LOGP(DRLCMAC, LOGL_DEBUG, "Paging MI - %s\n",
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osmo_mi_name(pag->identity_lv + 1, pag->identity_lv[0]));
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2018-02-19 16:17:28 +00:00
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/* try to add paging */
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2020-03-26 09:18:17 +00:00
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if ((pag->identity_lv[1] & GSM_MI_TYPE_MASK) == GSM_MI_TYPE_TMSI) {
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2018-02-19 16:17:28 +00:00
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/* TMSI */
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len = 1 + 1 + 1 + 32 + 2 + 1;
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if (pag->identity_lv[0] != 5) {
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LOGP(DRLCMAC, LOGL_ERROR, "TMSI paging with "
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"MI != 5 octets!\n");
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goto continue_next;
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}
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} else {
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/* MI */
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len = 1 + 1 + 1 + 4 + (pag->identity_lv[0]<<3) + 2 + 1;
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if (pag->identity_lv[0] > 8) {
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LOGP(DRLCMAC, LOGL_ERROR, "Paging with "
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"MI > 8 octets!\n");
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goto continue_next;
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}
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}
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if (wp + len > 184) {
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LOGP(DRLCMAC, LOGL_DEBUG, "- Does not fit, so schedule "
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"next time\n");
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/* put back paging record, because does not fit */
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llist_add_tail(&pag->list, &paging_list);
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break;
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}
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Encoding::write_repeated_page_info(pag_vec, wp, pag->identity_lv[0],
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pag->identity_lv + 1, pag->chan_needed);
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continue_next:
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talloc_free(pag);
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pag = dequeue_paging();
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}
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bitvec_pack(pag_vec, msgb_put(msg, 23));
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2020-02-03 16:18:03 +00:00
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mac_control_block = (RlcMacDownlink_t *)talloc_zero(tall_pcu_ctx, RlcMacDownlink_t);
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2018-02-19 16:17:28 +00:00
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LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ TX : Packet Paging Request +++++++++++++++++++++++++\n");
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2020-02-03 16:18:03 +00:00
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rc = decode_gsm_rlcmac_downlink(pag_vec, mac_control_block);
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if (rc < 0) {
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LOGP(DRLCMAC, LOGL_ERROR, "Decoding of Downlink Packet Paging Request failed (%d)\n", rc);
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goto free_ret;
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}
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2018-02-19 16:17:28 +00:00
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LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- TX : Packet Paging Request -------------------------\n");
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bitvec_free(pag_vec);
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talloc_free(mac_control_block);
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return msg;
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2020-02-03 16:18:03 +00:00
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free_ret:
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bitvec_free(pag_vec);
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talloc_free(mac_control_block);
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msgb_free(msg);
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return NULL;
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2018-02-19 16:17:28 +00:00
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}
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2019-12-23 12:19:25 +00:00
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bool gprs_rlcmac_pdch::add_paging(uint8_t chan_needed, const uint8_t *mi, uint8_t mi_len)
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2018-02-19 16:17:28 +00:00
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{
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struct gprs_rlcmac_paging *pag = talloc_zero(tall_pcu_ctx, struct gprs_rlcmac_paging);
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if (!pag)
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return false;
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pag->chan_needed = chan_needed;
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2019-12-23 12:19:25 +00:00
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pag->identity_lv[0] = mi_len;
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memcpy(&pag->identity_lv[1], mi, mi_len);
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2018-02-19 16:17:28 +00:00
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llist_add(&pag->list, &paging_list);
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return true;
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}
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void gprs_rlcmac_pdch::rcv_control_ack(Packet_Control_Acknowledgement_t *packet, uint32_t fn)
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{
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struct gprs_rlcmac_tbf *tbf, *new_tbf;
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uint32_t tlli = packet->TLLI;
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GprsMs *ms = bts()->ms_by_tlli(tlli);
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gprs_rlcmac_ul_tbf *ul_tbf;
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tbf = bts()->ul_tbf_by_poll_fn(fn, trx_no(), ts_no);
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if (!tbf)
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tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no);
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if (!tbf) {
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LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with "
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"unknown FN=%u TLLI=0x%08x (TRX %d TS %d)\n",
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fn, tlli, trx_no(), ts_no);
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if (ms)
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LOGP(DRLCMAC, LOGL_NOTICE, "PACKET CONTROL ACK with "
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"unknown TBF corresponds to MS with IMSI %s, TA %d, "
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"uTBF (TFI=%d, state=%s), dTBF (TFI=%d, state=%s)\n",
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ms->imsi(), ms->ta(),
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ms->ul_tbf() ? ms->ul_tbf()->tfi() : 0,
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ms->ul_tbf() ? ms->ul_tbf()->state_name() : "None",
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ms->dl_tbf() ? ms->dl_tbf()->tfi() : 0,
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ms->dl_tbf() ? ms->dl_tbf()->state_name() : "None");
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return;
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}
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/* Reset N3101 counter: */
|
2018-02-20 17:16:11 +00:00
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tbf->n_reset(N3101);
|
2018-02-19 16:17:28 +00:00
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tbf->update_ms(tlli, GPRS_RLCMAC_UL_TBF);
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LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Control Ack\n");
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|
|
TBF_POLL_SCHED_UNSET(tbf);
|
|
|
|
|
|
|
|
/* check if this control ack belongs to packet uplink ack */
|
|
|
|
ul_tbf = as_ul_tbf(tbf);
|
|
|
|
if (ul_tbf && ul_tbf->handle_ctrl_ack()) {
|
|
|
|
LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] END\n");
|
|
|
|
if (ul_tbf->ctrl_ack_to_toggle())
|
|
|
|
LOGPTBF(tbf, LOGL_NOTICE, "Recovered uplink ack for UL\n");
|
|
|
|
|
|
|
|
tbf_free(tbf);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (tbf->dl_ass_state_is(GPRS_RLCMAC_DL_ASS_WAIT_ACK)) {
|
|
|
|
LOGPTBF(tbf, LOGL_DEBUG, "[UPLINK] DOWNLINK ASSIGNED\n");
|
|
|
|
/* reset N3105 */
|
2018-02-20 17:16:11 +00:00
|
|
|
tbf->n_reset(N3105);
|
2018-02-19 16:17:28 +00:00
|
|
|
TBF_SET_ASS_STATE_DL(tbf, GPRS_RLCMAC_DL_ASS_NONE);
|
|
|
|
|
|
|
|
new_tbf = tbf->ms() ? tbf->ms()->dl_tbf() : NULL;
|
|
|
|
if (!new_tbf) {
|
|
|
|
LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but DL "
|
|
|
|
"TBF is gone TLLI=0x%08x\n", tlli);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) &&
|
|
|
|
tbf->direction == new_tbf->direction)
|
|
|
|
tbf_free(tbf);
|
|
|
|
|
|
|
|
if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_CCCH)) {
|
|
|
|
/* We now know that the PACCH really existed */
|
|
|
|
LOGPTBF(new_tbf, LOGL_INFO,
|
|
|
|
"The TBF has been confirmed on the PACCH, "
|
|
|
|
"changed type from CCCH to PACCH\n");
|
|
|
|
TBF_ASS_TYPE_SET(new_tbf, GPRS_RLCMAC_FLAG_PACCH);
|
|
|
|
}
|
|
|
|
TBF_SET_STATE(new_tbf, GPRS_RLCMAC_FLOW);
|
|
|
|
/* stop pending assignment timer */
|
|
|
|
new_tbf->t_stop(T0, "control acked (DL-TBF)");
|
|
|
|
if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_TO_DL_ASS))
|
|
|
|
LOGPTBF(new_tbf, LOGL_NOTICE, "Recovered downlink assignment\n");
|
|
|
|
|
|
|
|
tbf_assign_control_ts(new_tbf);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (tbf->ul_ass_state_is(GPRS_RLCMAC_UL_ASS_WAIT_ACK)) {
|
|
|
|
LOGPTBF(tbf, LOGL_DEBUG, "[DOWNLINK] UPLINK ASSIGNED\n");
|
|
|
|
/* reset N3105 */
|
2018-02-20 17:16:11 +00:00
|
|
|
tbf->n_reset(N3105);
|
2018-02-19 16:17:28 +00:00
|
|
|
TBF_SET_ASS_STATE_UL(tbf, GPRS_RLCMAC_UL_ASS_NONE);
|
|
|
|
|
|
|
|
new_tbf = tbf->ms() ? tbf->ms()->ul_tbf() : NULL;
|
|
|
|
if (!new_tbf) {
|
|
|
|
LOGP(DRLCMAC, LOGL_ERROR, "Got ACK, but UL "
|
|
|
|
"TBF is gone TLLI=0x%08x\n", tlli);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (tbf->state_is(GPRS_RLCMAC_WAIT_RELEASE) &&
|
|
|
|
tbf->direction == new_tbf->direction)
|
|
|
|
tbf_free(tbf);
|
|
|
|
|
|
|
|
TBF_SET_STATE(new_tbf, GPRS_RLCMAC_FLOW);
|
|
|
|
if (new_tbf->check_n_clear(GPRS_RLCMAC_FLAG_TO_UL_ASS))
|
|
|
|
LOGPTBF(new_tbf, LOGL_NOTICE, "Recovered uplink assignment for UL\n");
|
|
|
|
|
|
|
|
tbf_assign_control_ts(new_tbf);
|
|
|
|
/* there might be LLC packets waiting in the queue, but the DL
|
|
|
|
* TBF might have been released while the UL TBF has been
|
|
|
|
* established */
|
|
|
|
if (new_tbf->ms()->need_dl_tbf())
|
|
|
|
new_tbf->establish_dl_tbf_on_pacch();
|
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
LOGP(DRLCMAC, LOGL_ERROR, "Error: received PACET CONTROL ACK "
|
|
|
|
"at no request\n");
|
|
|
|
}
|
|
|
|
|
2019-09-25 11:46:14 +00:00
|
|
|
void gprs_rlcmac_pdch::rcv_control_dl_ack_nack(Packet_Downlink_Ack_Nack_t *ack_nack, uint32_t fn, struct pcu_l1_meas *meas)
|
2018-02-19 16:17:28 +00:00
|
|
|
{
|
|
|
|
int8_t tfi = 0; /* must be signed */
|
|
|
|
struct gprs_rlcmac_dl_tbf *tbf;
|
|
|
|
int rc;
|
|
|
|
int num_blocks;
|
|
|
|
uint8_t bits_data[RLC_GPRS_WS/8];
|
|
|
|
bitvec bits;
|
|
|
|
int bsn_begin, bsn_end;
|
|
|
|
char show_bits[RLC_GPRS_WS + 1];
|
|
|
|
|
|
|
|
tfi = ack_nack->DOWNLINK_TFI;
|
|
|
|
tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no);
|
|
|
|
if (!tbf) {
|
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with "
|
|
|
|
"unknown FN=%u TFI=%d (TRX %d TS %d)\n",
|
|
|
|
fn, tfi, trx_no(), ts_no);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (tbf->tfi() != tfi) {
|
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET DOWNLINK ACK with "
|
|
|
|
"wrong TFI=%d, ignoring!\n", tfi);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Reset N3101 counter: */
|
2018-02-20 17:16:11 +00:00
|
|
|
tbf->n_reset(N3101);
|
2018-02-19 16:17:28 +00:00
|
|
|
|
|
|
|
if (tbf->handle_ack_nack())
|
|
|
|
LOGPTBF(tbf, LOGL_NOTICE, "Recovered downlink ack\n");
|
|
|
|
|
|
|
|
LOGPTBF(tbf, LOGL_DEBUG, "RX: [PCU <- BTS] Packet Downlink Ack/Nack\n");
|
|
|
|
|
|
|
|
bits.data = bits_data;
|
|
|
|
bits.data_len = sizeof(bits_data);
|
|
|
|
bits.cur_bit = 0;
|
|
|
|
|
|
|
|
num_blocks = Decoding::decode_gprs_acknack_bits(
|
|
|
|
&ack_nack->Ack_Nack_Description, &bits,
|
|
|
|
&bsn_begin, &bsn_end, tbf->window());
|
|
|
|
|
|
|
|
LOGP(DRLCMAC, LOGL_DEBUG,
|
|
|
|
"Got GPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), "
|
|
|
|
"\"%s\"\n",
|
|
|
|
ack_nack->Ack_Nack_Description.STARTING_SEQUENCE_NUMBER,
|
|
|
|
bsn_begin, bsn_end, num_blocks,
|
|
|
|
(Decoding::extract_rbb(&bits, show_bits), show_bits));
|
|
|
|
|
|
|
|
rc = tbf->rcvd_dl_ack(
|
|
|
|
ack_nack->Ack_Nack_Description.FINAL_ACK_INDICATION,
|
|
|
|
bsn_begin, &bits);
|
|
|
|
if (rc == 1) {
|
|
|
|
tbf_free(tbf);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
/* check for channel request */
|
|
|
|
if (ack_nack->Exist_Channel_Request_Description)
|
|
|
|
sched_ul_ass_or_rej(bts(), bts_data(), tbf);
|
|
|
|
|
|
|
|
/* get measurements */
|
|
|
|
if (tbf->ms()) {
|
2019-09-25 11:46:14 +00:00
|
|
|
get_meas(meas, &ack_nack->Channel_Quality_Report);
|
|
|
|
tbf->ms()->update_l1_meas(meas);
|
2018-02-19 16:17:28 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-09-25 11:46:14 +00:00
|
|
|
void gprs_rlcmac_pdch::rcv_control_egprs_dl_ack_nack(EGPRS_PD_AckNack_t *ack_nack, uint32_t fn, struct pcu_l1_meas *meas)
|
2018-02-19 16:17:28 +00:00
|
|
|
{
|
|
|
|
int8_t tfi = 0; /* must be signed */
|
|
|
|
struct gprs_rlcmac_dl_tbf *tbf;
|
|
|
|
int rc;
|
|
|
|
int num_blocks;
|
|
|
|
uint8_t bits_data[RLC_EGPRS_MAX_WS/8];
|
|
|
|
char show_bits[RLC_EGPRS_MAX_WS + 1];
|
|
|
|
bitvec bits;
|
|
|
|
int bsn_begin, bsn_end;
|
|
|
|
|
|
|
|
tfi = ack_nack->DOWNLINK_TFI;
|
|
|
|
tbf = bts()->dl_tbf_by_poll_fn(fn, trx_no(), ts_no);
|
|
|
|
if (!tbf) {
|
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with "
|
|
|
|
"unknown FN=%u TFI=%d (TRX %d TS %d)\n",
|
|
|
|
fn, tfi, trx_no(), ts_no);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
if (tbf->tfi() != tfi) {
|
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "EGPRS PACKET DOWNLINK ACK with "
|
|
|
|
"wrong TFI=%d, ignoring!\n", tfi);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Reset N3101 counter: */
|
2018-02-20 17:16:11 +00:00
|
|
|
tbf->n_reset(N3101);
|
2018-02-19 16:17:28 +00:00
|
|
|
|
|
|
|
if (tbf->handle_ack_nack())
|
|
|
|
LOGPTBF(tbf, LOGL_NOTICE, "Recovered EGPRS downlink ack\n");
|
|
|
|
|
|
|
|
LOGPTBF(tbf, LOGL_DEBUG,
|
|
|
|
"RX: [PCU <- BTS] EGPRS Packet Downlink Ack/Nack\n");
|
|
|
|
|
|
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "EGPRS ACK/NACK: "
|
|
|
|
"ut: %d, final: %d, bow: %d, eow: %d, ssn: %d, have_crbb: %d, "
|
|
|
|
"urbb_len:%d, %p, %p, %d, %d, win: %d-%d, urbb: %s\n",
|
|
|
|
(int)ack_nack->EGPRS_AckNack.UnionType,
|
|
|
|
(int)ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION,
|
|
|
|
(int)ack_nack->EGPRS_AckNack.Desc.BEGINNING_OF_WINDOW,
|
|
|
|
(int)ack_nack->EGPRS_AckNack.Desc.END_OF_WINDOW,
|
|
|
|
(int)ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER,
|
|
|
|
(int)ack_nack->EGPRS_AckNack.Desc.Exist_CRBB,
|
|
|
|
(int)ack_nack->EGPRS_AckNack.Desc.URBB_LENGTH,
|
|
|
|
(void *)&ack_nack->EGPRS_AckNack.UnionType,
|
|
|
|
(void *)&ack_nack->EGPRS_AckNack.Desc,
|
|
|
|
(int)offsetof(EGPRS_AckNack_t, Desc),
|
|
|
|
(int)offsetof(EGPRS_AckNack_w_len_t, Desc),
|
|
|
|
tbf->window()->v_a(),
|
|
|
|
tbf->window()->v_s(),
|
|
|
|
osmo_hexdump((const uint8_t *)&ack_nack->EGPRS_AckNack.Desc.URBB,
|
|
|
|
sizeof(ack_nack->EGPRS_AckNack.Desc.URBB)));
|
|
|
|
|
|
|
|
bits.data = bits_data;
|
|
|
|
bits.data_len = sizeof(bits_data);
|
|
|
|
bits.cur_bit = 0;
|
|
|
|
|
|
|
|
num_blocks = Decoding::decode_egprs_acknack_bits(
|
|
|
|
&ack_nack->EGPRS_AckNack.Desc, &bits,
|
|
|
|
&bsn_begin, &bsn_end, tbf->window());
|
|
|
|
|
|
|
|
LOGP(DRLCMAC, LOGL_DEBUG,
|
|
|
|
"Got EGPRS DL ACK bitmap: SSN: %d, BSN %d to %d - 1 (%d blocks), "
|
|
|
|
"\"%s\"\n",
|
|
|
|
ack_nack->EGPRS_AckNack.Desc.STARTING_SEQUENCE_NUMBER,
|
|
|
|
bsn_begin, bsn_end, num_blocks,
|
|
|
|
(Decoding::extract_rbb(&bits, show_bits), show_bits)
|
|
|
|
);
|
|
|
|
|
|
|
|
rc = tbf->rcvd_dl_ack(
|
|
|
|
ack_nack->EGPRS_AckNack.Desc.FINAL_ACK_INDICATION,
|
|
|
|
bsn_begin, &bits);
|
|
|
|
if (rc == 1) {
|
|
|
|
tbf_free(tbf);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* check for channel request */
|
|
|
|
if (ack_nack->Exist_ChannelRequestDescription)
|
|
|
|
sched_ul_ass_or_rej(bts(), bts_data(), tbf);
|
|
|
|
|
|
|
|
/* get measurements */
|
|
|
|
if (tbf->ms()) {
|
|
|
|
/* TODO: Implement Measurements parsing for EGPRS */
|
|
|
|
/*
|
2019-09-25 11:46:14 +00:00
|
|
|
get_meas(meas, &ack_nack->Channel_Quality_Report);
|
|
|
|
tbf->ms()->update_l1_meas(meas);
|
2018-02-19 16:17:28 +00:00
|
|
|
*/
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-09-25 11:46:14 +00:00
|
|
|
void gprs_rlcmac_pdch::rcv_resource_request(Packet_Resource_Request_t *request, uint32_t fn, struct pcu_l1_meas *meas)
|
2018-02-19 16:17:28 +00:00
|
|
|
{
|
|
|
|
struct gprs_rlcmac_sba *sba;
|
|
|
|
|
|
|
|
if (request->ID.UnionType) {
|
2020-05-12 17:20:10 +00:00
|
|
|
struct gprs_rlcmac_ul_tbf *ul_tbf;
|
|
|
|
struct gprs_rlcmac_dl_tbf *dl_tbf;
|
2018-02-19 16:17:28 +00:00
|
|
|
uint32_t tlli = request->ID.u.TLLI;
|
2020-05-12 17:20:10 +00:00
|
|
|
bool found = true;
|
2018-02-19 16:17:28 +00:00
|
|
|
|
|
|
|
GprsMs *ms = bts()->ms_by_tlli(tlli);
|
2020-05-12 17:20:10 +00:00
|
|
|
if (!ms) {
|
|
|
|
found = false;
|
2020-05-08 15:44:33 +00:00
|
|
|
ms = bts()->ms_alloc(0, 0); /* ms class updated later */
|
2020-05-12 17:20:10 +00:00
|
|
|
}
|
2020-05-08 15:44:33 +00:00
|
|
|
|
2018-02-19 16:17:28 +00:00
|
|
|
/* Keep the ms, even if it gets idle temporarily */
|
|
|
|
GprsMs::Guard guard(ms);
|
|
|
|
|
2020-05-12 17:20:10 +00:00
|
|
|
if (found) {
|
|
|
|
ul_tbf = ms->ul_tbf();
|
|
|
|
dl_tbf = ms->dl_tbf();
|
|
|
|
/* We got a RACH so the MS was in packet idle mode and thus
|
|
|
|
* didn't have any active TBFs */
|
|
|
|
if (ul_tbf) {
|
|
|
|
LOGPTBFUL(ul_tbf, LOGL_NOTICE,
|
|
|
|
"Got RACH from TLLI=0x%08x while TBF still exists. Killing pending UL TBF\n",
|
|
|
|
tlli);
|
|
|
|
tbf_free(ul_tbf);
|
|
|
|
}
|
|
|
|
if (dl_tbf) {
|
|
|
|
LOGPTBFUL(dl_tbf, LOGL_NOTICE,
|
|
|
|
"Got RACH from TLLI=0x%08x while TBF still exists. Release pending DL TBF\n",
|
|
|
|
tlli);
|
|
|
|
tbf_free(dl_tbf);
|
|
|
|
}
|
2018-02-19 16:17:28 +00:00
|
|
|
}
|
2020-05-12 17:20:10 +00:00
|
|
|
|
2018-02-19 16:17:28 +00:00
|
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "MS requests UL TBF "
|
|
|
|
"in packet resource request of single "
|
|
|
|
"block, so we provide one:\n");
|
|
|
|
sba = bts()->sba()->find(this, fn);
|
|
|
|
if (!sba) {
|
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "MS requests UL TBF "
|
|
|
|
"in packet resource request of single "
|
|
|
|
"block, but there is no resource request "
|
|
|
|
"scheduled!\n");
|
|
|
|
} else {
|
2020-05-12 17:27:16 +00:00
|
|
|
ms->set_ta(sba->ta);
|
2018-02-19 16:17:28 +00:00
|
|
|
bts()->sba()->free_sba(sba);
|
|
|
|
}
|
2020-03-23 17:49:16 +00:00
|
|
|
if (request->Exist_MS_Radio_Access_capability2) {
|
2020-05-08 15:44:33 +00:00
|
|
|
uint8_t ms_class, egprs_ms_class;
|
2018-02-19 16:17:28 +00:00
|
|
|
ms_class = Decoding::get_ms_class_by_capability(
|
2020-03-23 17:49:16 +00:00
|
|
|
&request->MS_Radio_Access_capability2);
|
2020-05-08 15:44:33 +00:00
|
|
|
ms->set_ms_class(ms_class);
|
2018-02-19 16:17:28 +00:00
|
|
|
egprs_ms_class =
|
|
|
|
Decoding::get_egprs_ms_class_by_capability(
|
2020-03-23 17:49:16 +00:00
|
|
|
&request->MS_Radio_Access_capability2);
|
2020-05-08 15:44:33 +00:00
|
|
|
ms->set_egprs_ms_class(egprs_ms_class);
|
2018-02-19 16:17:28 +00:00
|
|
|
}
|
2020-05-08 15:44:33 +00:00
|
|
|
if (!ms->ms_class())
|
2018-02-19 16:17:28 +00:00
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "MS does not give us a class.\n");
|
2020-05-08 15:44:33 +00:00
|
|
|
if (ms->egprs_ms_class())
|
2020-05-12 17:20:10 +00:00
|
|
|
LOGP(DRLCMAC, LOGL_INFO,
|
2018-02-19 16:17:28 +00:00
|
|
|
"MS supports EGPRS multislot class %d.\n",
|
2020-05-08 15:44:33 +00:00
|
|
|
ms->egprs_ms_class());
|
|
|
|
|
2020-05-12 17:27:16 +00:00
|
|
|
ul_tbf = tbf_alloc_ul(bts_data(), ms, trx_no(), tlli);
|
2018-02-19 16:17:28 +00:00
|
|
|
if (!ul_tbf) {
|
|
|
|
handle_tbf_reject(bts_data(), ms, tlli,
|
|
|
|
trx_no(), ts_no);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* set control ts to current MS's TS, until assignment complete */
|
2019-12-24 12:02:48 +00:00
|
|
|
LOGPTBF(ul_tbf, LOGL_DEBUG, "change control TS %d -> %d until assignment is complete.\n",
|
2018-02-19 16:17:28 +00:00
|
|
|
ul_tbf->control_ts, ts_no);
|
|
|
|
|
|
|
|
ul_tbf->control_ts = ts_no;
|
|
|
|
/* schedule uplink assignment */
|
|
|
|
TBF_SET_ASS_STATE_UL(ul_tbf, GPRS_RLCMAC_UL_ASS_SEND_ASS);
|
|
|
|
|
|
|
|
/* get measurements */
|
|
|
|
if (ul_tbf->ms()) {
|
2019-09-25 11:46:14 +00:00
|
|
|
get_meas(meas, request);
|
|
|
|
ul_tbf->ms()->update_l1_meas(meas);
|
2018-02-19 16:17:28 +00:00
|
|
|
}
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (request->ID.u.Global_TFI.UnionType) {
|
|
|
|
struct gprs_rlcmac_dl_tbf *dl_tbf;
|
|
|
|
int8_t tfi = request->ID.u.Global_TFI.u.DOWNLINK_TFI;
|
|
|
|
dl_tbf = bts()->dl_tbf_by_tfi(tfi, trx_no(), ts_no);
|
|
|
|
if (!dl_tbf) {
|
2018-10-06 08:42:58 +00:00
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESOURCE REQ unknown downlink TFI=%d\n", tfi);
|
2018-02-19 16:17:28 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
LOGPTBFDL(dl_tbf, LOGL_ERROR,
|
|
|
|
"RX: [PCU <- BTS] FIXME: Packet resource request\n");
|
|
|
|
|
|
|
|
/* Reset N3101 counter: */
|
2018-02-20 17:16:11 +00:00
|
|
|
dl_tbf->n_reset(N3101);
|
2018-02-19 16:17:28 +00:00
|
|
|
} else {
|
|
|
|
struct gprs_rlcmac_ul_tbf *ul_tbf;
|
|
|
|
int8_t tfi = request->ID.u.Global_TFI.u.UPLINK_TFI;
|
|
|
|
ul_tbf = bts()->ul_tbf_by_tfi(tfi, trx_no(), ts_no);
|
|
|
|
if (!ul_tbf) {
|
2018-10-06 08:42:58 +00:00
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "PACKET RESOURCE REQ unknown uplink TFI=%d\n", tfi);
|
2018-02-19 16:17:28 +00:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
LOGPTBFUL(ul_tbf, LOGL_ERROR,
|
|
|
|
"RX: [PCU <- BTS] FIXME: Packet resource request\n");
|
|
|
|
|
|
|
|
/* Reset N3101 counter: */
|
2018-02-20 17:16:11 +00:00
|
|
|
ul_tbf->n_reset(N3101);
|
2018-02-19 16:17:28 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void gprs_rlcmac_pdch::rcv_measurement_report(Packet_Measurement_Report_t *report, uint32_t fn)
|
|
|
|
{
|
|
|
|
struct gprs_rlcmac_sba *sba;
|
|
|
|
|
|
|
|
sba = bts()->sba()->find(this, fn);
|
|
|
|
if (!sba) {
|
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement "
|
|
|
|
"in packet resource request of single "
|
|
|
|
"block, but there is no resource request "
|
|
|
|
"scheduled! TLLI=0x%08x\n", report->TLLI);
|
|
|
|
} else {
|
|
|
|
GprsMs *ms = bts()->ms_store().get_ms(report->TLLI);
|
|
|
|
if (!ms)
|
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "MS send measurement "
|
|
|
|
"but TLLI 0x%08x is unknown\n", report->TLLI);
|
|
|
|
else
|
|
|
|
ms->set_ta(sba->ta);
|
|
|
|
|
|
|
|
bts()->sba()->free_sba(sba);
|
|
|
|
}
|
|
|
|
gprs_rlcmac_meas_rep(report);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Received Uplink RLC control block. */
|
2019-09-25 11:35:11 +00:00
|
|
|
int gprs_rlcmac_pdch::rcv_control_block(const uint8_t *data, uint8_t data_len,
|
2020-05-18 09:35:35 +00:00
|
|
|
uint32_t fn, struct pcu_l1_meas *meas, enum CodingScheme cs)
|
2018-02-19 16:17:28 +00:00
|
|
|
{
|
2019-09-25 11:35:11 +00:00
|
|
|
bitvec *rlc_block;
|
|
|
|
RlcMacUplink_t *ul_control_block;
|
2020-05-18 09:35:35 +00:00
|
|
|
unsigned len = mcs_max_bytes_ul(cs);
|
2020-02-03 16:18:03 +00:00
|
|
|
int rc;
|
2019-09-25 11:35:11 +00:00
|
|
|
|
|
|
|
if (!(rlc_block = bitvec_alloc(len, tall_pcu_ctx)))
|
|
|
|
return -ENOMEM;
|
|
|
|
bitvec_unpack(rlc_block, data);
|
|
|
|
ul_control_block = (RlcMacUplink_t *)talloc_zero(tall_pcu_ctx, RlcMacUplink_t);
|
|
|
|
|
2018-02-19 16:17:28 +00:00
|
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "+++++++++++++++++++++++++ RX : Uplink Control Block +++++++++++++++++++++++++\n");
|
2020-03-06 01:48:24 +00:00
|
|
|
|
2020-03-26 21:33:59 +00:00
|
|
|
rc = decode_gsm_rlcmac_uplink(rlc_block, ul_control_block);
|
2020-03-06 01:48:24 +00:00
|
|
|
if (ul_control_block->u.MESSAGE_TYPE == MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK)
|
2020-05-19 15:23:23 +00:00
|
|
|
bts()->send_gsmtap_meas(PCU_GSMTAP_C_UL_DUMMY, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len, meas);
|
2020-03-06 01:48:24 +00:00
|
|
|
else
|
2020-05-19 15:23:23 +00:00
|
|
|
bts()->send_gsmtap_meas(PCU_GSMTAP_C_UL_CTRL, true, trx_no(), ts_no, GSMTAP_CHANNEL_PACCH, fn, data, data_len, meas);
|
2020-03-06 01:48:24 +00:00
|
|
|
|
2020-02-03 16:18:03 +00:00
|
|
|
if(rc < 0) {
|
|
|
|
LOGP(DRLCMACUL, LOGL_ERROR, "Dropping Uplink Control Block with invalid "
|
|
|
|
"content, decode failed: %d)\n", rc);
|
|
|
|
goto free_ret;
|
|
|
|
}
|
2018-02-19 16:17:28 +00:00
|
|
|
LOGP(DRLCMAC, LOGL_DEBUG, "------------------------- RX : Uplink Control Block -------------------------\n");
|
|
|
|
|
2020-05-12 18:54:35 +00:00
|
|
|
bts()->do_rate_ctr_inc(CTR_RLC_RECV_CONTROL);
|
2018-02-19 16:17:28 +00:00
|
|
|
switch (ul_control_block->u.MESSAGE_TYPE) {
|
|
|
|
case MT_PACKET_CONTROL_ACK:
|
|
|
|
rcv_control_ack(&ul_control_block->u.Packet_Control_Acknowledgement, fn);
|
|
|
|
break;
|
|
|
|
case MT_PACKET_DOWNLINK_ACK_NACK:
|
2019-09-25 11:46:14 +00:00
|
|
|
rcv_control_dl_ack_nack(&ul_control_block->u.Packet_Downlink_Ack_Nack, fn, meas);
|
2018-02-19 16:17:28 +00:00
|
|
|
break;
|
|
|
|
case MT_EGPRS_PACKET_DOWNLINK_ACK_NACK:
|
2019-09-25 11:46:14 +00:00
|
|
|
rcv_control_egprs_dl_ack_nack(&ul_control_block->u.Egprs_Packet_Downlink_Ack_Nack, fn, meas);
|
2018-02-19 16:17:28 +00:00
|
|
|
break;
|
|
|
|
case MT_PACKET_RESOURCE_REQUEST:
|
2019-09-25 11:46:14 +00:00
|
|
|
rcv_resource_request(&ul_control_block->u.Packet_Resource_Request, fn, meas);
|
2018-02-19 16:17:28 +00:00
|
|
|
break;
|
|
|
|
case MT_PACKET_MEASUREMENT_REPORT:
|
|
|
|
rcv_measurement_report(&ul_control_block->u.Packet_Measurement_Report, fn);
|
|
|
|
break;
|
|
|
|
case MT_PACKET_UPLINK_DUMMY_CONTROL_BLOCK:
|
|
|
|
/* ignoring it. change the SI to not force sending these? */
|
|
|
|
break;
|
|
|
|
default:
|
2020-05-12 18:54:35 +00:00
|
|
|
bts()->do_rate_ctr_inc(CTR_DECODE_ERRORS);
|
2018-02-19 16:17:28 +00:00
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE,
|
|
|
|
"RX: [PCU <- BTS] unknown control block(%d) received\n",
|
|
|
|
ul_control_block->u.MESSAGE_TYPE);
|
|
|
|
}
|
2020-02-03 16:18:03 +00:00
|
|
|
free_ret:
|
2018-02-19 16:17:28 +00:00
|
|
|
talloc_free(ul_control_block);
|
2019-09-25 11:35:11 +00:00
|
|
|
bitvec_free(rlc_block);
|
2020-02-03 16:18:03 +00:00
|
|
|
return rc;
|
2018-02-19 16:17:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* received RLC/MAC block from L1 */
|
|
|
|
int gprs_rlcmac_pdch::rcv_block(uint8_t *data, uint8_t len, uint32_t fn,
|
|
|
|
struct pcu_l1_meas *meas)
|
|
|
|
{
|
2020-05-18 09:35:35 +00:00
|
|
|
enum CodingScheme cs = mcs_get_by_size_ul(len);
|
2018-02-19 16:17:28 +00:00
|
|
|
if (!cs) {
|
2020-05-12 18:54:35 +00:00
|
|
|
bts()->do_rate_ctr_inc(CTR_DECODE_ERRORS);
|
2020-06-30 15:44:11 +00:00
|
|
|
LOGP(DRLCMACUL, LOGL_ERROR, "Dropping data block with invalid "
|
|
|
|
"length %d: %s\n", len, osmo_hexdump(data, len));
|
2018-02-19 16:17:28 +00:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2020-05-12 20:32:24 +00:00
|
|
|
bts()->do_rate_ctr_add(CTR_RLC_UL_BYTES, len);
|
2018-02-19 16:17:28 +00:00
|
|
|
|
|
|
|
LOGP(DRLCMACUL, LOGL_DEBUG, "Got RLC block, coding scheme: %s, "
|
2020-05-18 09:35:35 +00:00
|
|
|
"length: %d (%d))\n", mcs_name(cs), len, mcs_used_size_ul(cs));
|
2018-02-19 16:17:28 +00:00
|
|
|
|
2019-03-25 15:32:50 +00:00
|
|
|
if (mcs_is_gprs(cs))
|
2018-02-19 16:17:28 +00:00
|
|
|
return rcv_block_gprs(data, len, fn, meas, cs);
|
|
|
|
|
2019-03-25 15:32:50 +00:00
|
|
|
if (mcs_is_edge(cs))
|
2018-02-19 16:17:28 +00:00
|
|
|
return rcv_data_block(data, len, fn, meas, cs);
|
|
|
|
|
2020-05-12 18:54:35 +00:00
|
|
|
bts()->do_rate_ctr_inc(CTR_DECODE_ERRORS);
|
2018-02-19 16:17:28 +00:00
|
|
|
LOGP(DRLCMACUL, LOGL_ERROR, "Unsupported coding scheme %s\n",
|
2019-03-05 13:59:03 +00:00
|
|
|
mcs_name(cs));
|
2018-02-19 16:17:28 +00:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*! \brief process egprs and gprs data blocks */
|
|
|
|
int gprs_rlcmac_pdch::rcv_data_block(uint8_t *data, uint8_t data_len, uint32_t fn,
|
2020-05-18 09:35:35 +00:00
|
|
|
struct pcu_l1_meas *meas, enum CodingScheme cs)
|
2018-02-19 16:17:28 +00:00
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
struct gprs_rlc_data_info rlc_dec;
|
|
|
|
struct gprs_rlcmac_ul_tbf *tbf;
|
2020-05-18 09:35:35 +00:00
|
|
|
unsigned len = mcs_size_ul(cs);
|
2018-02-19 16:17:28 +00:00
|
|
|
|
|
|
|
/* These are always data blocks, since EGPRS still uses CS-1 for
|
|
|
|
* control blocks (see 44.060, section 10.3, 1st par.)
|
|
|
|
*/
|
2019-03-25 15:32:50 +00:00
|
|
|
if (mcs_is_edge(cs)) {
|
2020-05-19 15:23:23 +00:00
|
|
|
bts()->send_gsmtap_meas(PCU_GSMTAP_C_UL_DATA_EGPRS, true,
|
|
|
|
trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn,
|
|
|
|
data, data_len, meas);
|
2018-02-19 16:17:28 +00:00
|
|
|
if (!bts()->bts_data()->egprs_enabled) {
|
|
|
|
LOGP(DRLCMACUL, LOGL_ERROR,
|
|
|
|
"Got %s RLC block but EGPRS is not enabled\n",
|
2019-03-05 13:59:03 +00:00
|
|
|
mcs_name(cs));
|
2020-04-29 19:02:08 +00:00
|
|
|
return 0;
|
2018-02-19 16:17:28 +00:00
|
|
|
}
|
|
|
|
} else {
|
2020-05-19 15:23:23 +00:00
|
|
|
bts()->send_gsmtap_meas(PCU_GSMTAP_C_UL_DATA_GPRS, true,
|
|
|
|
trx_no(), ts_no, GSMTAP_CHANNEL_PDTCH, fn,
|
|
|
|
data, data_len, meas);
|
2018-02-19 16:17:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
LOGP(DRLCMACUL, LOGL_DEBUG, " UL data: %s\n", osmo_hexdump(data, len));
|
|
|
|
|
|
|
|
rc = Decoding::rlc_parse_ul_data_header(&rlc_dec, data, cs);
|
|
|
|
if (rc < 0) {
|
|
|
|
LOGP(DRLCMACUL, LOGL_ERROR,
|
|
|
|
"Got %s RLC block but header parsing has failed\n",
|
2019-03-05 13:59:03 +00:00
|
|
|
mcs_name(cs));
|
2020-05-12 18:54:35 +00:00
|
|
|
bts()->do_rate_ctr_inc(CTR_DECODE_ERRORS);
|
2018-02-19 16:17:28 +00:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
LOGP(DRLCMACUL, LOGL_INFO,
|
|
|
|
"Got %s RLC block: "
|
|
|
|
"R=%d, SI=%d, TFI=%d, CPS=%d, RSB=%d, "
|
|
|
|
"rc=%d\n",
|
2019-03-05 13:59:03 +00:00
|
|
|
mcs_name(cs),
|
2018-02-19 16:17:28 +00:00
|
|
|
rlc_dec.r, rlc_dec.si, rlc_dec.tfi, rlc_dec.cps, rlc_dec.rsb,
|
|
|
|
rc);
|
|
|
|
|
|
|
|
/* find TBF inst from given TFI */
|
|
|
|
tbf = ul_tbf_by_tfi(rlc_dec.tfi);
|
|
|
|
if (!tbf) {
|
|
|
|
LOGP(DRLCMACUL, LOGL_NOTICE, "UL DATA unknown TFI=%d\n",
|
|
|
|
rlc_dec.tfi);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Reset N3101 counter: */
|
2018-02-20 17:16:11 +00:00
|
|
|
tbf->n_reset(N3101);
|
2018-02-19 16:17:28 +00:00
|
|
|
|
|
|
|
return tbf->rcv_data_block_acknowledged(&rlc_dec, data, meas);
|
|
|
|
}
|
|
|
|
|
|
|
|
int gprs_rlcmac_pdch::rcv_block_gprs(uint8_t *data, uint8_t data_len, uint32_t fn,
|
2020-05-18 09:35:35 +00:00
|
|
|
struct pcu_l1_meas *meas, enum CodingScheme cs)
|
2018-02-19 16:17:28 +00:00
|
|
|
{
|
|
|
|
unsigned payload = data[0] >> 6;
|
|
|
|
int rc = 0;
|
|
|
|
|
|
|
|
switch (payload) {
|
|
|
|
case GPRS_RLCMAC_DATA_BLOCK:
|
|
|
|
rc = rcv_data_block(data, data_len, fn, meas, cs);
|
|
|
|
break;
|
|
|
|
case GPRS_RLCMAC_CONTROL_BLOCK:
|
2019-09-25 11:46:14 +00:00
|
|
|
rc = rcv_control_block(data, data_len, fn, meas, cs);
|
2018-02-19 16:17:28 +00:00
|
|
|
break;
|
|
|
|
case GPRS_RLCMAC_CONTROL_BLOCK_OPT:
|
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "GPRS_RLCMAC_CONTROL_BLOCK_OPT block payload is not supported.\n");
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
LOGP(DRLCMAC, LOGL_NOTICE, "Unknown RLCMAC block payload(%u).\n", payload);
|
|
|
|
rc = -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_from_list_by_tfi(
|
|
|
|
LListHead<gprs_rlcmac_tbf> *tbf_list, uint8_t tfi,
|
|
|
|
enum gprs_rlcmac_tbf_direction dir)
|
|
|
|
{
|
|
|
|
gprs_rlcmac_tbf *tbf;
|
|
|
|
LListHead<gprs_rlcmac_tbf> *pos;
|
|
|
|
|
|
|
|
llist_for_each(pos, tbf_list) {
|
|
|
|
tbf = pos->entry();
|
|
|
|
if (tbf->tfi() != tfi)
|
|
|
|
continue;
|
|
|
|
if (!tbf->pdch[ts_no])
|
|
|
|
continue;
|
|
|
|
return tbf;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
gprs_rlcmac_ul_tbf *gprs_rlcmac_pdch::ul_tbf_by_tfi(uint8_t tfi)
|
|
|
|
{
|
|
|
|
return as_ul_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_UL_TBF));
|
|
|
|
}
|
|
|
|
|
|
|
|
gprs_rlcmac_dl_tbf *gprs_rlcmac_pdch::dl_tbf_by_tfi(uint8_t tfi)
|
|
|
|
{
|
|
|
|
return as_dl_tbf(tbf_by_tfi(tfi, GPRS_RLCMAC_DL_TBF));
|
|
|
|
}
|
|
|
|
|
|
|
|
/* lookup TBF Entity (by TFI) */
|
|
|
|
gprs_rlcmac_tbf *gprs_rlcmac_pdch::tbf_by_tfi(uint8_t tfi,
|
|
|
|
enum gprs_rlcmac_tbf_direction dir)
|
|
|
|
{
|
|
|
|
struct gprs_rlcmac_tbf *tbf;
|
|
|
|
|
|
|
|
if (tfi >= 32)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
tbf = m_tbfs[dir][tfi];
|
|
|
|
|
|
|
|
if (!tbf)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
if (tbf->state_is_not(GPRS_RLCMAC_RELEASING)) {
|
|
|
|
return tbf;
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
void gprs_rlcmac_pdch::attach_tbf(gprs_rlcmac_tbf *tbf)
|
|
|
|
{
|
|
|
|
gprs_rlcmac_ul_tbf *ul_tbf;
|
|
|
|
|
|
|
|
if (m_tbfs[tbf->direction][tbf->tfi()])
|
|
|
|
LOGP(DRLCMAC, LOGL_ERROR, "PDCH(TS %d, TRX %d): "
|
|
|
|
"%s has not been detached, overwriting it\n",
|
|
|
|
ts_no, trx_no(),
|
|
|
|
m_tbfs[tbf->direction][tbf->tfi()]->name());
|
|
|
|
|
|
|
|
m_num_tbfs[tbf->direction] += 1;
|
|
|
|
if (tbf->direction == GPRS_RLCMAC_UL_TBF) {
|
|
|
|
ul_tbf = as_ul_tbf(tbf);
|
|
|
|
m_assigned_usf |= 1 << ul_tbf->m_usf[ts_no];
|
|
|
|
}
|
|
|
|
m_assigned_tfi[tbf->direction] |= 1UL << tbf->tfi();
|
|
|
|
m_tbfs[tbf->direction][tbf->tfi()] = tbf;
|
|
|
|
|
|
|
|
LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Attaching %s, %d TBFs, "
|
|
|
|
"USFs = %02x, TFIs = %08x.\n",
|
|
|
|
ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction],
|
|
|
|
m_assigned_usf, m_assigned_tfi[tbf->direction]);
|
|
|
|
}
|
|
|
|
|
|
|
|
void gprs_rlcmac_pdch::detach_tbf(gprs_rlcmac_tbf *tbf)
|
|
|
|
{
|
|
|
|
gprs_rlcmac_ul_tbf *ul_tbf;
|
|
|
|
|
|
|
|
OSMO_ASSERT(m_num_tbfs[tbf->direction] > 0);
|
|
|
|
|
|
|
|
m_num_tbfs[tbf->direction] -= 1;
|
|
|
|
if (tbf->direction == GPRS_RLCMAC_UL_TBF) {
|
|
|
|
ul_tbf = as_ul_tbf(tbf);
|
|
|
|
m_assigned_usf &= ~(1 << ul_tbf->m_usf[ts_no]);
|
|
|
|
}
|
|
|
|
m_assigned_tfi[tbf->direction] &= ~(1UL << tbf->tfi());
|
|
|
|
m_tbfs[tbf->direction][tbf->tfi()] = NULL;
|
|
|
|
|
|
|
|
LOGP(DRLCMAC, LOGL_INFO, "PDCH(TS %d, TRX %d): Detaching %s, %d TBFs, "
|
|
|
|
"USFs = %02x, TFIs = %08x.\n",
|
|
|
|
ts_no, trx_no(), tbf->name(), m_num_tbfs[tbf->direction],
|
|
|
|
m_assigned_usf, m_assigned_tfi[tbf->direction]);
|
|
|
|
}
|
|
|
|
|
|
|
|
void gprs_rlcmac_pdch::reserve(enum gprs_rlcmac_tbf_direction dir)
|
|
|
|
{
|
|
|
|
m_num_reserved[dir] += 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
void gprs_rlcmac_pdch::unreserve(enum gprs_rlcmac_tbf_direction dir)
|
|
|
|
{
|
|
|
|
OSMO_ASSERT(m_num_reserved[dir] > 0);
|
|
|
|
m_num_reserved[dir] -= 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline BTS *gprs_rlcmac_pdch::bts() const
|
|
|
|
{
|
|
|
|
return trx->bts;
|
|
|
|
}
|
|
|
|
|
|
|
|
uint8_t gprs_rlcmac_pdch::trx_no() const
|
|
|
|
{
|
|
|
|
return trx->trx_no;
|
|
|
|
}
|
|
|
|
|
|
|
|
inline gprs_rlcmac_bts *gprs_rlcmac_pdch::bts_data() const
|
|
|
|
{
|
|
|
|
return trx->bts->bts_data();
|
|
|
|
}
|
2019-10-05 14:57:14 +00:00
|
|
|
|
|
|
|
/* PTCCH (Packet Timing Advance Control Channel) */
|
|
|
|
void gprs_rlcmac_pdch::init_ptcch_msg(void)
|
|
|
|
{
|
|
|
|
memset(ptcch_msg, PTCCH_TAI_FREE, PTCCH_TAI_NUM);
|
|
|
|
memset(ptcch_msg + PTCCH_TAI_NUM, PTCCH_PADDING, 7);
|
|
|
|
}
|
|
|
|
|
|
|
|
uint8_t gprs_rlcmac_pdch::reserve_tai(uint8_t ta)
|
|
|
|
{
|
|
|
|
uint8_t tai;
|
|
|
|
|
|
|
|
for (tai = 0; tai < PTCCH_TAI_NUM; tai++) {
|
|
|
|
if (ptcch_msg[tai] == PTCCH_TAI_FREE) {
|
|
|
|
ptcch_msg[tai] = ta;
|
|
|
|
return tai;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Special case: no free TAI available */
|
|
|
|
return PTCCH_TAI_FREE;
|
|
|
|
}
|
|
|
|
|
|
|
|
void gprs_rlcmac_pdch::release_tai(uint8_t tai)
|
|
|
|
{
|
|
|
|
OSMO_ASSERT(tai < PTCCH_TAI_NUM);
|
|
|
|
ptcch_msg[tai] = PTCCH_TAI_FREE;
|
|
|
|
}
|
|
|
|
|
|
|
|
void gprs_rlcmac_pdch::update_ta(uint8_t tai, uint8_t ta)
|
|
|
|
{
|
|
|
|
OSMO_ASSERT(tai < PTCCH_TAI_NUM);
|
|
|
|
ptcch_msg[tai] = ta;
|
|
|
|
}
|