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/*! \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 <http://www.gnu.org/licenses/>.
*
*/
#pragma once
struct sockaddr_storage;
#include <osmocom/gsm/protocol/gsm_08_08.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include <osmocom/gsm/gsm23003.h>
#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/gsm/tlv.h>
/*! (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 gsm29205_gcr *gcr; /**< §3.2.2.115 Global Call Reference */
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);
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_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);
/*! @} */
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