/*! \addtogroup gsm0808 * @{ * \file gsm0808_utils.h */ /* * (C) 2016 by sysmocom - s.f.m.c. GmbH, Author: Philipp Maier * 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 . * */ #pragma once struct sockaddr_storage; #include #include #include #include #include #include /*! (225-1)/2 is the maximum number of elements in a cell identifier list. */ #define GSM0808_CELL_ID_LIST2_MAXLEN 127 /*! Instead of this, use either struct gsm0808_cell_id or gsm0808_cell_id_list2. * All elements contain parsed representations of the data in the corresponding IE, in host-byte order. */ union gsm0808_cell_id_u { struct osmo_cell_global_id global; struct osmo_lac_and_ci_id lac_and_ci; uint16_t ci; struct osmo_location_area_id lai_and_lac; uint16_t lac; }; /*! Parsed representation of Cell Identifier IE (3GPP TS 48.008 3.2.2.17) */ struct gsm0808_cell_id { enum CELL_IDENT id_discr; union gsm0808_cell_id_u id; }; /*! Parsed representation of a Cell Identifier List IE (3GPP TS 48.008 3.2.2.27). */ struct gsm0808_cell_id_list2 { enum CELL_IDENT id_discr; union gsm0808_cell_id_u id_list[GSM0808_CELL_ID_LIST2_MAXLEN]; unsigned int id_list_len; }; /*! LCLS-related parameters from 3GPP TS 48.008 */ struct osmo_lcls { enum gsm0808_lcls_config config; /**< §3.2.2.116 Configuration */ enum gsm0808_lcls_control control; /**< §3.2.2.117 Connection Status Control */ struct osmo_gcr_parsed gcr; /**< §3.2.2.115 Global Call Reference */ bool gcr_available; bool corr_needed; /**< §3.2.2.118 Correlation-Not-Needed */ }; extern const struct value_string gsm0808_cell_id_discr_names[]; static inline const char *gsm0808_cell_id_discr_name(enum CELL_IDENT id_discr) { return get_value_string(gsm0808_cell_id_discr_names, id_discr); } const char *gsm0808_cell_id_name(const struct gsm0808_cell_id *cid); const char *gsm0808_cell_id_name2(const struct gsm0808_cell_id *cid); const char *gsm0808_cell_id_list_name(const struct gsm0808_cell_id_list2 *cil); int gsm0808_cell_id_list_name_buf(char *buf, size_t buflen, const struct gsm0808_cell_id_list2 *cil); int gsm0808_cell_id_u_name(char *buf, size_t buflen, enum CELL_IDENT id_discr, const union gsm0808_cell_id_u *u); bool gsm0808_cell_ids_match(const struct gsm0808_cell_id *id1, const struct gsm0808_cell_id *id2, bool exact_match); int gsm0808_cell_id_matches_list(const struct gsm0808_cell_id *id, const struct gsm0808_cell_id_list2 *list, unsigned int match_nr, bool exact_match); uint8_t gsm0808_enc_cause(struct msgb *msg, uint16_t cause); uint8_t gsm0808_enc_aoip_trasp_addr(struct msgb *msg, const struct sockaddr_storage *ss); int gsm0808_dec_aoip_trasp_addr(struct sockaddr_storage *ss, const uint8_t *elem, uint8_t len); uint8_t gsm0808_enc_lcls(struct msgb *msg, const struct osmo_lcls *lcls); int gsm0808_dec_lcls(struct osmo_lcls *lcls, const struct tlv_parsed *tp); uint8_t gsm0808_enc_speech_codec(struct msgb *msg, const struct gsm0808_speech_codec *sc); int gsm0808_dec_speech_codec(struct gsm0808_speech_codec *sc, const uint8_t *elem, uint8_t len); uint8_t gsm0808_enc_speech_codec_list(struct msgb *msg, const struct gsm0808_speech_codec_list *scl); int gsm0808_dec_speech_codec_list(struct gsm0808_speech_codec_list *scl, const uint8_t *elem, uint8_t len); uint8_t gsm0808_enc_channel_type(struct msgb *msg, const struct gsm0808_channel_type *ct); int gsm0808_dec_channel_type(struct gsm0808_channel_type *ct, const uint8_t *elem, uint8_t len); uint8_t gsm0808_enc_encrypt_info(struct msgb *msg, const struct gsm0808_encrypt_info *ei); int gsm0808_dec_encrypt_info(struct gsm0808_encrypt_info *ei, const uint8_t *elem, uint8_t len); uint8_t gsm0808_enc_cell_id_list2(struct msgb *msg, const struct gsm0808_cell_id_list2 *cil); uint8_t gsm0808_enc_cell_id_list(struct msgb *msg, const struct gsm0808_cell_id_list *cil) OSMO_DEPRECATED("use gsm0808_enc_cell_id_list2 instead"); int gsm0808_dec_cell_id_list2(struct gsm0808_cell_id_list2 *cil, const uint8_t *elem, uint8_t len); int gsm0808_dec_cell_id_list(struct gsm0808_cell_id_list *cil, const uint8_t *elem, uint8_t len) OSMO_DEPRECATED("use gsm0808_dec_cell_id_list2 instead"); int gsm0808_cell_id_list_add(struct gsm0808_cell_id_list2 *dst, const struct gsm0808_cell_id_list2 *src); void gsm0808_cell_id_to_list(struct gsm0808_cell_id_list2 *dst, const struct gsm0808_cell_id *src); uint8_t gsm0808_enc_cell_id(struct msgb *msg, const struct gsm0808_cell_id *ci); int gsm0808_dec_cell_id(struct gsm0808_cell_id *ci, const uint8_t *elem, uint8_t len); int gsm0808_chan_type_to_speech_codec(uint8_t perm_spch); int gsm0808_speech_codec_from_chan_type(struct gsm0808_speech_codec *sc, uint8_t perm_spch); uint16_t gsm0808_sc_cfg_from_gsm48_mr_cfg(const struct gsm48_multi_rate_conf *cfg, bool fr); void gsm48_mr_cfg_from_gsm0808_sc_cfg(struct gsm48_multi_rate_conf *cfg, uint16_t s15_s0); /*! \returns 3GPP TS 08.08 §3.2.2.5 Class of a given Cause */ static inline enum gsm0808_cause_class gsm0808_cause_class(enum gsm0808_cause cause) { return (cause << 1) >> 4; } /*! \returns true if 3GPP TS 08.08 §3.2.2.5 Class has extended bit set */ static inline bool gsm0808_cause_ext(enum gsm0808_cause cause) { /* check that cause looks like 1XXX0000 where XXX represent class */ return (cause & 0x80) && !(cause & 0x0F); } int gsm0808_get_cipher_reject_cause(const struct tlv_parsed *tp); /*! \returns 3GPP TS 48.008 3.2.2.49 Current Channel Type 1 from enum gsm_chan_t. */ static inline uint8_t gsm0808_current_channel_type_1(enum gsm_chan_t type) { switch (type) { default: return 0; case GSM_LCHAN_SDCCH: return 0x01; case GSM_LCHAN_TCH_F: return 0x18; case GSM_LCHAN_TCH_H: return 0x19; } } /*! Return 3GPP TS 48.008 3.2.2.51 Speech Version aka permitted speech version indication in 3.2.2.11 * Channel Type. */ static inline enum gsm0808_permitted_speech gsm0808_permitted_speech(enum gsm_chan_t type, enum gsm48_chan_mode mode) { switch (mode) { case GSM48_CMODE_SPEECH_V1: switch (type) { case GSM_LCHAN_TCH_F: return GSM0808_PERM_FR1; case GSM_LCHAN_TCH_H: return GSM0808_PERM_HR1; default: return 0; } case GSM48_CMODE_SPEECH_EFR: switch (type) { case GSM_LCHAN_TCH_F: return GSM0808_PERM_FR2; case GSM_LCHAN_TCH_H: return GSM0808_PERM_HR2; default: return 0; } case GSM48_CMODE_SPEECH_AMR: switch (type) { case GSM_LCHAN_TCH_F: return GSM0808_PERM_FR3; case GSM_LCHAN_TCH_H: return GSM0808_PERM_HR3; default: return 0; } default: return 0; } } /*! Return 3GPP TS 48.008 3.2.2.33 Chosen Channel. */ static inline uint8_t gsm0808_chosen_channel(enum gsm_chan_t type, enum gsm48_chan_mode mode) { uint8_t channel_mode = 0, channel = 0; switch (mode) { case GSM48_CMODE_SPEECH_V1: case GSM48_CMODE_SPEECH_EFR: case GSM48_CMODE_SPEECH_AMR: channel_mode = 0x9; break; case GSM48_CMODE_SIGN: channel_mode = 0x8; break; case GSM48_CMODE_DATA_14k5: channel_mode = 0xe; break; case GSM48_CMODE_DATA_12k0: channel_mode = 0xb; break; case GSM48_CMODE_DATA_6k0: channel_mode = 0xc; break; case GSM48_CMODE_DATA_3k6: channel_mode = 0xd; break; default: return 0; } switch (type) { case GSM_LCHAN_NONE: channel = 0x0; break; case GSM_LCHAN_SDCCH: channel = 0x1; break; case GSM_LCHAN_TCH_F: channel = 0x8; break; case GSM_LCHAN_TCH_H: channel = 0x9; break; default: return 0; } return channel_mode << 4 | channel; } const char *gsm0808_channel_type_name(const struct gsm0808_channel_type *ct); /*! @} */