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101 lines
3.8 KiB
C++
101 lines
3.8 KiB
C++
/**
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* Copyright 2013-2020 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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*
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* srsLTE 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
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#include "npdsch_ue_helper.h"
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#include "srslte/asn1/rrc_nbiot.h"
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#include "srslte/phy/utils/vector.h" // for SRSLTE_MIN
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int get_sib2_params(const uint8_t* sib1_payload, const uint32_t len, srslte_nbiot_si_params_t* sib2_params)
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{
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memset(sib2_params, 0, sizeof(srslte_nbiot_si_params_t));
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// unpack SIB
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asn1::rrc::bcch_dl_sch_msg_nb_s dlsch_msg;
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asn1::cbit_ref dlsch_bref(sib1_payload, len);
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asn1::SRSASN_CODE err = dlsch_msg.unpack(dlsch_bref);
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if (err != asn1::SRSASN_SUCCESS) {
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fprintf(stderr, "Error unpacking DL-SCH message\n");
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return SRSLTE_ERROR;
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}
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// set SIB2-NB parameters
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sib2_params->n = 1;
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auto sched_info = dlsch_msg.msg.c1().sib_type1_r13().sched_info_list_r13.begin();
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sib2_params->si_periodicity = sched_info->si_periodicity_r13.to_number();
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if (dlsch_msg.msg.c1().sib_type1_r13().si_radio_frame_offset_r13_present) {
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sib2_params->si_radio_frame_offset = dlsch_msg.msg.c1().sib_type1_r13().si_radio_frame_offset_r13;
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}
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sib2_params->si_repetition_pattern = sched_info->si_repeat_pattern_r13.to_number();
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sib2_params->si_tb = sched_info->si_tb_r13.to_number();
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sib2_params->si_window_length = dlsch_msg.msg.c1().sib_type1_r13().si_win_len_r13.to_number();
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return SRSLTE_SUCCESS;
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}
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/*
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* Unpacks BCCH BCH message and writes JSON formatted message to output
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*/
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int bcch_bch_to_pretty_string(const uint8_t* bcch_bch_payload,
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const uint32_t input_len,
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char* output,
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const uint32_t max_output_len)
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{
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asn1::rrc::bcch_bch_msg_nb_s bch_msg;
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asn1::cbit_ref bch_bref(bcch_bch_payload, input_len);
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asn1::SRSASN_CODE err = bch_msg.unpack(bch_bref);
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if (err != asn1::SRSASN_SUCCESS) {
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fprintf(stderr, "Error unpacking BCCH message\n");
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return SRSLTE_ERROR;
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}
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asn1::json_writer json_writer;
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bch_msg.to_json(json_writer);
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uint32_t output_len = SRSLTE_MIN(max_output_len, json_writer.to_string().length());
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memcpy(output, json_writer.to_string().c_str(), output_len);
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return SRSLTE_SUCCESS;
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}
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/*
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* Unpacks BCCH DL-SCH message and writes JSON formatted message to output
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*/
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int bcch_dl_sch_to_pretty_string(const uint8_t* bcch_dl_sch_payload,
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const uint32_t input_len,
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char* output,
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const uint32_t max_output_len)
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{
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asn1::rrc::bcch_dl_sch_msg_nb_s dlsch_msg;
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asn1::cbit_ref dlsch_bref(bcch_dl_sch_payload, input_len);
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asn1::SRSASN_CODE err = dlsch_msg.unpack(dlsch_bref);
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if (err != asn1::SRSASN_SUCCESS) {
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fprintf(stderr, "Error unpacking DL-SCH message\n");
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return SRSLTE_ERROR;
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}
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asn1::json_writer json_writer;
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dlsch_msg.to_json(json_writer);
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uint32_t output_len = SRSLTE_MIN(max_output_len, json_writer.to_string().length());
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memcpy(output, json_writer.to_string().c_str(), output_len);
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return SRSLTE_SUCCESS;
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} |