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/*! \file sysinfo.c
* GSM 04.08 System Information (SI) encoding and decoding.
* 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */
/*
* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <osmocom/core/bitvec.h>
#include <osmocom/core/utils.h>
#include <osmocom/gsm/sysinfo.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include <osmocom/gsm/protocol/gsm_08_58.h>
/* verify the sizes of the system information type structs */
/* rest octets are not part of the struct */
osmo_static_assert(sizeof(struct gsm48_system_information_type_header) == 3, _si_header_size);
osmo_static_assert(sizeof(struct gsm48_rach_control) == 3, _si_rach_control);
osmo_static_assert(sizeof(struct gsm48_system_information_type_1) == 22, _si1_size);
osmo_static_assert(sizeof(struct gsm48_system_information_type_2) == 23, _si2_size);
osmo_static_assert(sizeof(struct gsm48_system_information_type_3) == 19, _si3_size);
osmo_static_assert(sizeof(struct gsm48_system_information_type_4) == 13, _si4_size);
/* bs11 forgot the l2 len, 0-6 rest octets */
osmo_static_assert(sizeof(struct gsm48_system_information_type_5) == 18, _si5_size);
osmo_static_assert(sizeof(struct gsm48_system_information_type_6) == 11, _si6_size);
osmo_static_assert(sizeof(struct gsm48_system_information_type_10) == 1, _si10_size);
osmo_static_assert(sizeof(struct gsm48_system_information_type_13) == 3, _si13_size);
static const uint8_t sitype2rsl[_MAX_SYSINFO_TYPE] = {
[SYSINFO_TYPE_1] = RSL_SYSTEM_INFO_1,
[SYSINFO_TYPE_2] = RSL_SYSTEM_INFO_2,
[SYSINFO_TYPE_3] = RSL_SYSTEM_INFO_3,
[SYSINFO_TYPE_4] = RSL_SYSTEM_INFO_4,
[SYSINFO_TYPE_5] = RSL_SYSTEM_INFO_5,
[SYSINFO_TYPE_6] = RSL_SYSTEM_INFO_6,
[SYSINFO_TYPE_7] = RSL_SYSTEM_INFO_7,
[SYSINFO_TYPE_8] = RSL_SYSTEM_INFO_8,
[SYSINFO_TYPE_9] = RSL_SYSTEM_INFO_9,
[SYSINFO_TYPE_10] = RSL_SYSTEM_INFO_10,
[SYSINFO_TYPE_13] = RSL_SYSTEM_INFO_13,
[SYSINFO_TYPE_16] = RSL_SYSTEM_INFO_16,
[SYSINFO_TYPE_17] = RSL_SYSTEM_INFO_17,
[SYSINFO_TYPE_18] = RSL_SYSTEM_INFO_18,
[SYSINFO_TYPE_19] = RSL_SYSTEM_INFO_19,
[SYSINFO_TYPE_20] = RSL_SYSTEM_INFO_20,
[SYSINFO_TYPE_2bis] = RSL_SYSTEM_INFO_2bis,
[SYSINFO_TYPE_2ter] = RSL_SYSTEM_INFO_2ter,
[SYSINFO_TYPE_2quater] = RSL_SYSTEM_INFO_2quater,
[SYSINFO_TYPE_5bis] = RSL_SYSTEM_INFO_5bis,
[SYSINFO_TYPE_5ter] = RSL_SYSTEM_INFO_5ter,
[SYSINFO_TYPE_EMO] = RSL_EXT_MEAS_ORDER,
[SYSINFO_TYPE_MEAS_INFO]= RSL_MEAS_INFO,
};
static const uint8_t rsl2sitype[256] = {
[RSL_SYSTEM_INFO_1] = SYSINFO_TYPE_1,
[RSL_SYSTEM_INFO_2] = SYSINFO_TYPE_2,
[RSL_SYSTEM_INFO_3] = SYSINFO_TYPE_3,
[RSL_SYSTEM_INFO_4] = SYSINFO_TYPE_4,
[RSL_SYSTEM_INFO_5] = SYSINFO_TYPE_5,
[RSL_SYSTEM_INFO_6] = SYSINFO_TYPE_6,
[RSL_SYSTEM_INFO_7] = SYSINFO_TYPE_7,
[RSL_SYSTEM_INFO_8] = SYSINFO_TYPE_8,
[RSL_SYSTEM_INFO_9] = SYSINFO_TYPE_9,
[RSL_SYSTEM_INFO_10] = SYSINFO_TYPE_10,
[RSL_SYSTEM_INFO_13] = SYSINFO_TYPE_13,
[RSL_SYSTEM_INFO_16] = SYSINFO_TYPE_16,
[RSL_SYSTEM_INFO_17] = SYSINFO_TYPE_17,
[RSL_SYSTEM_INFO_18] = SYSINFO_TYPE_18,
[RSL_SYSTEM_INFO_19] = SYSINFO_TYPE_19,
[RSL_SYSTEM_INFO_20] = SYSINFO_TYPE_20,
[RSL_SYSTEM_INFO_2bis] = SYSINFO_TYPE_2bis,
[RSL_SYSTEM_INFO_2ter] = SYSINFO_TYPE_2ter,
[RSL_SYSTEM_INFO_2quater] = SYSINFO_TYPE_2quater,
[RSL_SYSTEM_INFO_5bis] = SYSINFO_TYPE_5bis,
[RSL_SYSTEM_INFO_5ter] = SYSINFO_TYPE_5ter,
[RSL_EXT_MEAS_ORDER] = SYSINFO_TYPE_EMO,
[RSL_MEAS_INFO] = SYSINFO_TYPE_MEAS_INFO,
};
const struct value_string osmo_sitype_strs[_MAX_SYSINFO_TYPE] = {
{ SYSINFO_TYPE_1, "1" },
{ SYSINFO_TYPE_2, "2" },
{ SYSINFO_TYPE_3, "3" },
{ SYSINFO_TYPE_4, "4" },
{ SYSINFO_TYPE_5, "5" },
{ SYSINFO_TYPE_6, "6" },
{ SYSINFO_TYPE_7, "7" },
{ SYSINFO_TYPE_8, "8" },
{ SYSINFO_TYPE_9, "9" },
{ SYSINFO_TYPE_10, "10" },
{ SYSINFO_TYPE_13, "13" },
{ SYSINFO_TYPE_16, "16" },
{ SYSINFO_TYPE_17, "17" },
{ SYSINFO_TYPE_18, "18" },
{ SYSINFO_TYPE_19, "19" },
{ SYSINFO_TYPE_20, "20" },
{ SYSINFO_TYPE_2bis, "2bis" },
{ SYSINFO_TYPE_2ter, "2ter" },
{ SYSINFO_TYPE_2quater, "2quater" },
{ SYSINFO_TYPE_5bis, "5bis" },
{ SYSINFO_TYPE_5ter, "5ter" },
{ SYSINFO_TYPE_EMO, "EMO" },
{ SYSINFO_TYPE_MEAS_INFO, "MI" },
{ 0, NULL }
};
/*! Add pair of arfcn and measurement bandwith value to earfcn struct
* \param[in,out] e earfcn struct
* \param[in] arfcn EARFCN value, 16 bits
* \param[in] meas_bw measurement bandwith value
* \returns 0 on success, error otherwise
*/
int osmo_earfcn_add(struct osmo_earfcn_si2q *e, uint16_t arfcn, uint8_t meas_bw)
{
size_t i;
for (i = 0; i < e->length; i++) {
if (OSMO_EARFCN_INVALID == e->arfcn[i]) {
e->arfcn[i] = arfcn;
e->meas_bw[i] = meas_bw;
return 0;
}
}
return -ENOMEM;
}
/*! Return number of bits necessary to represent earfcn struct as
* Repeated E-UTRAN Neighbour Cells IE from 3GPP TS 44.018 Table 10.5.2.33b.1
* \param[in,out] e earfcn struct
* \returns number of bits
*/
size_t osmo_earfcn_bit_size(const struct osmo_earfcn_si2q *e)
{
return osmo_earfcn_bit_size_ext(e, 0);
}
/*! Return number of bits necessary to represent earfcn struct as
* Repeated E-UTRAN Neighbour Cells IE from 3GPP TS 44.018 Table 10.5.2.33b.1
* \param[in,out] e earfcn struct
* \param[in] offset into earfcn struct: how many EARFCNs to skip while estimating size
* \returns number of bits
*/
size_t osmo_earfcn_bit_size_ext(const struct osmo_earfcn_si2q *e, size_t offset)
{
/* 1 stop bit + 5 bits for THRESH_E-UTRAN_high */
size_t i, bits = 6, skip = 0;
for (i = 0; i < e->length; i++) {
if (e->arfcn[i] != OSMO_EARFCN_INVALID) {
if (skip < offset)
skip++;
else {
bits += 17;
if (OSMO_EARFCN_MEAS_INVALID == e->meas_bw[i])
bits++;
else
bits += 4;
}
}
}
bits += (e->prio_valid) ? 4 : 1;
bits += (e->thresh_lo_valid) ? 6 : 1;
bits += (e->qrxlm_valid) ? 6 : 1;
return bits;
}
/*! Delete arfcn (and corresponding measurement bandwith) from earfcn
* struct
* \param[in,out] e earfcn struct
* \param[in] arfcn EARFCN value, 16 bits
* \returns 0 on success, error otherwise
*/
int osmo_earfcn_del(struct osmo_earfcn_si2q *e, uint16_t arfcn)
{
size_t i;
for (i = 0; i < e->length; i++) {
if (arfcn == e->arfcn[i]) {
e->arfcn[i] = OSMO_EARFCN_INVALID;
e->meas_bw[i] = OSMO_EARFCN_MEAS_INVALID;
return 0;
}
}
return -ENOENT;
}
/*! Initialize earfcn struct
* \param[in,out] e earfcn struct
*/
void osmo_earfcn_init(struct osmo_earfcn_si2q *e)
{
size_t i;
for (i = 0; i < e->length; i++) {
e->arfcn[i] = OSMO_EARFCN_INVALID;
e->meas_bw[i] = OSMO_EARFCN_MEAS_INVALID;
}
}
uint8_t osmo_sitype2rsl(enum osmo_sysinfo_type si_type)
{
return sitype2rsl[si_type];
}
enum osmo_sysinfo_type osmo_rsl2sitype(uint8_t rsl_si)
{
return rsl2sitype[rsl_si];
}
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