1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/*! \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/gsm29205.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 osmo_gcr_parsed gcr; /**< §3.2.2.115 Global Call Reference */
bool gcr_available;
bool corr_needed; /**< §3.2.2.118 Correlation-Not-Needed */
};
char *osmo_lcls_dump(const struct osmo_lcls *lcls);
char *osmo_gcr_dump(const struct osmo_lcls *lcls);
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);
void gsm0808_cell_id_from_cgi(struct gsm0808_cell_id *cid, enum CELL_IDENT id_discr,
const struct osmo_cell_global_id *cgi);
int gsm0808_cell_id_to_cgi(struct osmo_cell_global_id *cgi, const struct gsm0808_cell_id *cid);
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);
/*! @} */
|
