/*! \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 * * All Rights Reserved * * 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 . * */ #include #include #include #include #include #include #include #include /* 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_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]; }