From 834193484439acd6056a891e9b2df5992a370088 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Tue, 22 Mar 2011 16:36:13 +0100 Subject: include: reorganize headers file to include/osmocom/[gsm|core] This patch moves all GSM-specific definitions to include/osmocom/gsm. Moreover, the headers in include/osmocore/ have been moved to include/osmocom/core. This has been proposed by Harald Welte and Sylvain Munaunt. Tested with `make distcheck'. Signed-off-by: Pablo Neira Ayuso --- include/osmocom/gsm/gsm_utils.h | 117 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 include/osmocom/gsm/gsm_utils.h (limited to 'include/osmocom/gsm/gsm_utils.h') diff --git a/include/osmocom/gsm/gsm_utils.h b/include/osmocom/gsm/gsm_utils.h new file mode 100644 index 00000000..19adb70a --- /dev/null +++ b/include/osmocom/gsm/gsm_utils.h @@ -0,0 +1,117 @@ +/* GSM utility functions, e.g. coding and decoding */ +/* + * (C) 2008 by Daniel Willmann + * (C) 2009 by Holger Hans Peter Freyther + * (C) 2009-2010 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, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#ifndef GSM_UTILS_H +#define GSM_UTILS_H + +#include + +#define ADD_MODULO(sum, delta, modulo) do { \ + if ((sum += delta) >= modulo) \ + sum -= modulo; \ + } while (0) + +#define GSM_MAX_FN (26*51*2048) + +struct gsm_time { + uint32_t fn; /* FN count */ + uint16_t t1; /* FN div (26*51) */ + uint8_t t2; /* FN modulo 26 */ + uint8_t t3; /* FN modulo 51 */ + uint8_t tc; +}; + +enum gsm_band { + GSM_BAND_850 = 1, + GSM_BAND_900 = 2, + GSM_BAND_1800 = 4, + GSM_BAND_1900 = 8, + GSM_BAND_450 = 0x10, + GSM_BAND_480 = 0x20, + GSM_BAND_750 = 0x40, + GSM_BAND_810 = 0x80, +}; + +const char *gsm_band_name(enum gsm_band band); +enum gsm_band gsm_band_parse(const char *mhz); + +int gsm_7bit_decode(char *decoded, const uint8_t *user_data, uint8_t length); +int gsm_7bit_encode(uint8_t *result, const char *data); + +int ms_pwr_ctl_lvl(enum gsm_band band, unsigned int dbm); +int ms_pwr_dbm(enum gsm_band band, uint8_t lvl); + +/* According to TS 08.05 Chapter 8.1.4 */ +int rxlev2dbm(uint8_t rxlev); +uint8_t dbm2rxlev(int dbm); + +/* According to GSM 04.08 Chapter 10.5.1.6 */ +static inline int ms_cm2_a5n_support(uint8_t *cm2, int n) { + switch (n) { + case 0: return 1; + case 1: return (cm2[0] & (1<<3)) ? 0 : 1; + case 2: return (cm2[2] & (1<<0)) ? 1 : 0; + case 3: return (cm2[2] & (1<<1)) ? 1 : 0; + default: + return 0; + } +} + +/* According to GSM 04.08 Chapter 10.5.2.29 */ +static inline int rach_max_trans_val2raw(int val) { return (val >> 1) & 3; } +static inline int rach_max_trans_raw2val(int raw) { + const int tbl[4] = { 1, 2, 4, 7 }; + return tbl[raw & 3]; +} + +#define ARFCN_PCS 0x8000 +#define ARFCN_UPLINK 0x4000 +#define ARFCN_FLAG_MASK 0xf000 /* Reserve the upper 5 bits for flags */ + +enum gsm_band gsm_arfcn2band(uint16_t arfcn); + +/* Convert an ARFCN to the frequency in MHz * 10 */ +uint16_t gsm_arfcn2freq10(uint16_t arfcn, int uplink); + +/* Convert from frame number to GSM time */ +void gsm_fn2gsmtime(struct gsm_time *time, uint32_t fn); + +/* Convert from GSM time to frame number */ +uint32_t gsm_gsmtime2fn(struct gsm_time *time); + +/* GSM TS 03.03 Chapter 2.6 */ +enum gprs_tlli_type { + TLLI_LOCAL, + TLLI_FOREIGN, + TLLI_RANDOM, + TLLI_AUXILIARY, + TLLI_RESERVED, +}; + +/* TS 03.03 Chapter 2.6 */ +int gprs_tlli_type(uint32_t tlli); + +uint32_t gprs_tmsi2tlli(uint32_t p_tmsi, enum gprs_tlli_type type); + +#endif -- cgit v1.2.3