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
|
/*! \defgroup gsup Generic Subscriber Update Protocol
* @{
*
* The Generic Subscriber Update Protocol (GSUP) is an Osmocom-specific
* non-standard protocol replacing MAP as the protocol between
* MSC/VLR/SGSN and HLR in a 3GPP cellular communications network.
*
* It was designed around the same transactions and architecture as the
* MAP messages/operations, but without the complexity of TCAP and MAP,
* and without the need for ASN.1 encoding.
*
* The purpose is to keep protocol complexity out of OsmoSGSN and
* OsmoMSC, while providing a clean path to an external GSUP to MAP
* translator.
*
* \file gsup.h
* Osmocom Generic Subscriber Update Protocol message encoder/decoder. */
/*
* (C) 2014 by sysmocom - s.f.m.c. GmbH, Author: Jacob Erlbeck
* (C) 2016 by Harald Welte <laforge@gnumonks.org>
* 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
#include <stdint.h>
#include <osmocom/core/msgb.h>
#include <osmocom/gsm/protocol/gsm_23_003.h>
#include <osmocom/gsm/protocol/gsm_04_08_gprs.h>
#include <osmocom/crypt/auth.h>
#define OSMO_GSUP_PORT 4222
/*! Maximum nubmer of PDP inside \ref osmo_gsup_message */
#define OSMO_GSUP_MAX_NUM_PDP_INFO 10 /* GSM 09.02 limits this to 50 */
/*! Maximum number of auth info inside \ref osmo_gsup_message */
#define OSMO_GSUP_MAX_NUM_AUTH_INFO 5
/*! Maximum number of octets encoding MSISDN in BCD format */
#define OSMO_GSUP_MAX_MSISDN_LEN 9
#define OSMO_GSUP_MAX_CALLED_PARTY_BCD_LEN 43 /* TS 24.008 10.5.4.7 */
#define OSMO_GSUP_PDP_TYPE_SIZE 2
/*! Information Element Identifiers for GSUP IEs */
enum osmo_gsup_iei {
OSMO_GSUP_IMSI_IE = 0x01,
OSMO_GSUP_CAUSE_IE = 0x02,
OSMO_GSUP_AUTH_TUPLE_IE = 0x03,
OSMO_GSUP_PDP_INFO_COMPL_IE = 0x04,
OSMO_GSUP_PDP_INFO_IE = 0x05,
OSMO_GSUP_CANCEL_TYPE_IE = 0x06,
OSMO_GSUP_FREEZE_PTMSI_IE = 0x07,
OSMO_GSUP_MSISDN_IE = 0x08,
OSMO_GSUP_HLR_NUMBER_IE = 0x09,
OSMO_GSUP_PDP_CONTEXT_ID_IE = 0x10,
OSMO_GSUP_PDP_TYPE_IE = 0x11,
OSMO_GSUP_ACCESS_POINT_NAME_IE = 0x12,
OSMO_GSUP_PDP_QOS_IE = 0x13,
OSMO_GSUP_CHARG_CHAR_IE = 0x14,
OSMO_GSUP_RAND_IE = 0x20,
OSMO_GSUP_SRES_IE = 0x21,
OSMO_GSUP_KC_IE = 0x22,
/* 3G support */
OSMO_GSUP_IK_IE = 0x23,
OSMO_GSUP_CK_IE = 0x24,
OSMO_GSUP_AUTN_IE = 0x25,
OSMO_GSUP_AUTS_IE = 0x26,
OSMO_GSUP_RES_IE = 0x27,
OSMO_GSUP_CN_DOMAIN_IE = 0x28,
OSMO_GSUP_SESSION_ID_IE = 0x30,
OSMO_GSUP_SESSION_STATE_IE = 0x31,
/*! Supplementary Services payload */
OSMO_GSUP_SS_INFO_IE = 0x35,
};
/*! GSUP message type */
enum osmo_gsup_message_type {
OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST = 0b00000100,
OSMO_GSUP_MSGT_UPDATE_LOCATION_ERROR = 0b00000101,
OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT = 0b00000110,
OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST = 0b00001000,
OSMO_GSUP_MSGT_SEND_AUTH_INFO_ERROR = 0b00001001,
OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT = 0b00001010,
OSMO_GSUP_MSGT_AUTH_FAIL_REPORT = 0b00001011,
OSMO_GSUP_MSGT_PURGE_MS_REQUEST = 0b00001100,
OSMO_GSUP_MSGT_PURGE_MS_ERROR = 0b00001101,
OSMO_GSUP_MSGT_PURGE_MS_RESULT = 0b00001110,
OSMO_GSUP_MSGT_INSERT_DATA_REQUEST = 0b00010000,
OSMO_GSUP_MSGT_INSERT_DATA_ERROR = 0b00010001,
OSMO_GSUP_MSGT_INSERT_DATA_RESULT = 0b00010010,
OSMO_GSUP_MSGT_DELETE_DATA_REQUEST = 0b00010100,
OSMO_GSUP_MSGT_DELETE_DATA_ERROR = 0b00010101,
OSMO_GSUP_MSGT_DELETE_DATA_RESULT = 0b00010110,
OSMO_GSUP_MSGT_LOCATION_CANCEL_REQUEST = 0b00011100,
OSMO_GSUP_MSGT_LOCATION_CANCEL_ERROR = 0b00011101,
OSMO_GSUP_MSGT_LOCATION_CANCEL_RESULT = 0b00011110,
OSMO_GSUP_MSGT_PROC_SS_REQUEST = 0b00100000,
OSMO_GSUP_MSGT_PROC_SS_ERROR = 0b00100001,
OSMO_GSUP_MSGT_PROC_SS_RESULT = 0b00100010,
};
#define OSMO_GSUP_IS_MSGT_REQUEST(msgt) (((msgt) & 0b00000011) == 0b00)
#define OSMO_GSUP_IS_MSGT_ERROR(msgt) (((msgt) & 0b00000011) == 0b01)
#define OSMO_GSUP_TO_MSGT_ERROR(msgt) (((msgt) & 0b11111100) | 0b01)
extern const struct value_string osmo_gsup_message_type_names[];
static inline const char *
osmo_gsup_message_type_name(enum osmo_gsup_message_type val)
{ return get_value_string(osmo_gsup_message_type_names, val); }
enum osmo_gsup_cancel_type {
OSMO_GSUP_CANCEL_TYPE_UPDATE = 1, /* on wire: 0 */
OSMO_GSUP_CANCEL_TYPE_WITHDRAW = 2, /* on wire: 1 */
};
enum osmo_gsup_cn_domain {
OSMO_GSUP_CN_DOMAIN_PS = 1,
OSMO_GSUP_CN_DOMAIN_CS = 2,
};
/*! TCAP-like session state */
enum osmo_gsup_session_state {
/*! Undefined session state */
OSMO_GSUP_SESSION_STATE_NONE = 0x00,
/*! Initiation of a new session */
OSMO_GSUP_SESSION_STATE_BEGIN = 0x01,
/*! Communication of an existing session */
OSMO_GSUP_SESSION_STATE_CONTINUE = 0x02,
/*! Indication of the session end */
OSMO_GSUP_SESSION_STATE_END = 0x03,
};
extern const struct value_string osmo_gsup_session_state_names[];
static inline const char *
osmo_gsup_session_state_name(enum osmo_gsup_session_state val)
{ return get_value_string(osmo_gsup_session_state_names, val); }
/*! parsed/decoded PDP context information */
struct osmo_gsup_pdp_info {
unsigned int context_id;
int have_info;
/*! Type of PDP context */
uint16_t pdp_type;
/*! APN information, still in encoded form. Can be NULL if no
* APN information included */
const uint8_t *apn_enc;
/*! length (in octets) of apn_enc */
size_t apn_enc_len;
/*! QoS information, still in encoded form. Can be NULL if no
* QoS information included */
const uint8_t *qos_enc;
/*! length (in octets) of qos_enc */
size_t qos_enc_len;
/*! PDP Charging Characteristics, still in encoded form. Can be NULL if no
* PDP Charging Characteristics */
const uint8_t *pdp_charg_enc;
/*! length (in octets) of pdp_charg_enc */
size_t pdp_charg_enc_len;
};
/*! parsed/decoded GSUP protocol message */
struct osmo_gsup_message {
enum osmo_gsup_message_type message_type;
char imsi[GSM23003_IMSI_MAX_DIGITS+2];
enum gsm48_gmm_cause cause;
enum osmo_gsup_cancel_type cancel_type;
int pdp_info_compl;
int freeze_ptmsi;
struct osmo_auth_vector auth_vectors[OSMO_GSUP_MAX_NUM_AUTH_INFO];
size_t num_auth_vectors;
struct osmo_gsup_pdp_info pdp_infos[OSMO_GSUP_MAX_NUM_PDP_INFO];
size_t num_pdp_infos;
const uint8_t *msisdn_enc;
size_t msisdn_enc_len;
const uint8_t *hlr_enc;
size_t hlr_enc_len;
const uint8_t *auts;
const uint8_t *rand;
enum osmo_gsup_cn_domain cn_domain;
const uint8_t *pdp_charg_enc;
size_t pdp_charg_enc_len;
/*! Session state \ref osmo_gsup_session_state */
enum osmo_gsup_session_state session_state;
/*! Unique session identifier and origination flag.
* Encoded only when \ref session_state != 0x00 */
uint32_t session_id;
/*! ASN.1 encoded MAP payload for Supplementary Services */
uint8_t *ss_info;
size_t ss_info_len;
};
int osmo_gsup_decode(const uint8_t *data, size_t data_len,
struct osmo_gsup_message *gsup_msg);
int osmo_gsup_encode(struct msgb *msg, const struct osmo_gsup_message *gsup_msg);
int osmo_gsup_get_err_msg_type(enum osmo_gsup_message_type type_in);
/*! @} */
|
