| /*! \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, |
| }; |
| |
| /*! 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); |
| |
| /*! @} */ |