121 lines
3.9 KiB
C
121 lines
3.9 KiB
C
/* Osmocom Subscriber Update Protocol message encoder/decoder */
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/* (C) 2014 by Sysmocom s.f.m.c. GmbH
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* (C) 2016 by Harald Welte <laforge@gnumonks.org>
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* All Rights Reserved
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*
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* Author: Jacob Erlbeck
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#include <stdint.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/gsm/protocol/gsm_23_003.h>
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#include <osmocom/gsm/protocol/gsm_04_08_gprs.h>
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#include <osmocom/crypt/auth.h>
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#define OSMO_GSUP_MAX_NUM_PDP_INFO 10 /* GSM 09.02 limits this to 50 */
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#define OSMO_GSUP_MAX_NUM_AUTH_INFO 5
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#define OSMO_GSUP_MAX_MSISDN_LEN 9
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#define OSMO_GSUP_PDP_TYPE_SIZE 2
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enum osmo_gsup_iei {
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OSMO_GSUP_IMSI_IE = 0x01,
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OSMO_GSUP_CAUSE_IE = 0x02,
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OSMO_GSUP_AUTH_TUPLE_IE = 0x03,
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OSMO_GSUP_PDP_INFO_COMPL_IE = 0x04,
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OSMO_GSUP_PDP_INFO_IE = 0x05,
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OSMO_GSUP_CANCEL_TYPE_IE = 0x06,
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OSMO_GSUP_FREEZE_PTMSI_IE = 0x07,
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OSMO_GSUP_MSISDN_IE = 0x08,
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OSMO_GSUP_HLR_NUMBER_IE = 0x09,
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OSMO_GSUP_PDP_CONTEXT_ID_IE = 0x10,
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OSMO_GSUP_PDP_TYPE_IE = 0x11,
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OSMO_GSUP_ACCESS_POINT_NAME_IE = 0x12,
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OSMO_GSUP_PDP_QOS_IE = 0x13,
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OSMO_GSUP_RAND_IE = 0x20,
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OSMO_GSUP_SRES_IE = 0x21,
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OSMO_GSUP_KC_IE = 0x22,
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};
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enum osmo_gsup_message_type {
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OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST = 0b00000100,
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OSMO_GSUP_MSGT_UPDATE_LOCATION_ERROR = 0b00000101,
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OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT = 0b00000110,
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OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST = 0b00001000,
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OSMO_GSUP_MSGT_SEND_AUTH_INFO_ERROR = 0b00001001,
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OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT = 0b00001010,
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OSMO_GSUP_MSGT_PURGE_MS_REQUEST = 0b00001100,
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OSMO_GSUP_MSGT_PURGE_MS_ERROR = 0b00001101,
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OSMO_GSUP_MSGT_PURGE_MS_RESULT = 0b00001110,
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OSMO_GSUP_MSGT_INSERT_DATA_REQUEST = 0b00010000,
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OSMO_GSUP_MSGT_INSERT_DATA_ERROR = 0b00010001,
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OSMO_GSUP_MSGT_INSERT_DATA_RESULT = 0b00010010,
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OSMO_GSUP_MSGT_DELETE_DATA_REQUEST = 0b00010100,
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OSMO_GSUP_MSGT_DELETE_DATA_ERROR = 0b00010101,
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OSMO_GSUP_MSGT_DELETE_DATA_RESULT = 0b00010110,
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OSMO_GSUP_MSGT_LOCATION_CANCEL_REQUEST = 0b00011100,
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OSMO_GSUP_MSGT_LOCATION_CANCEL_ERROR = 0b00011101,
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OSMO_GSUP_MSGT_LOCATION_CANCEL_RESULT = 0b00011110,
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};
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#define OSMO_GSUP_IS_MSGT_REQUEST(msgt) (((msgt) & 0b00000011) == 0b00)
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#define OSMO_GSUP_IS_MSGT_ERROR(msgt) (((msgt) & 0b00000011) == 0b01)
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#define OSMO_GSUP_TO_MSGT_ERROR(msgt) (((msgt) & 0b11111100) | 0b01)
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enum osmo_gsup_cancel_type {
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OSMO_GSUP_CANCEL_TYPE_UPDATE = 1, /* on wire: 0 */
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OSMO_GSUP_CANCEL_TYPE_WITHDRAW = 2, /* on wire: 1 */
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};
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struct osmo_gsup_pdp_info {
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unsigned int context_id;
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int have_info;
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uint16_t pdp_type;
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const uint8_t *apn_enc;
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size_t apn_enc_len;
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const uint8_t *qos_enc;
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size_t qos_enc_len;
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};
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struct osmo_gsup_message {
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enum osmo_gsup_message_type message_type;
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char imsi[GSM23003_IMSI_MAX_DIGITS+2];
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enum gsm48_gmm_cause cause;
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enum osmo_gsup_cancel_type cancel_type;
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int pdp_info_compl;
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int freeze_ptmsi;
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struct osmo_auth_vector auth_vectors[OSMO_GSUP_MAX_NUM_AUTH_INFO];
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size_t num_auth_vectors;
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struct osmo_gsup_pdp_info pdp_infos[OSMO_GSUP_MAX_NUM_PDP_INFO];
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size_t num_pdp_infos;
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const uint8_t *msisdn_enc;
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size_t msisdn_enc_len;
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const uint8_t *hlr_enc;
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size_t hlr_enc_len;
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};
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int osmo_gsup_decode(const uint8_t *data, size_t data_len,
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struct osmo_gsup_message *gsup_msg);
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void osmo_gsup_encode(struct msgb *msg, const struct osmo_gsup_message *gsup_msg);
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