/*! \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 * 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 #include #include #include #include #include #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); /*! @} */