| /*! \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]; |
| } |