| /* Osmocom Authentication Protocol message encoder/decoder */ |
| |
| /* (C) 2015-2016 by sysmocom s.f.m.c. GmbH |
| * All Rights Reserved |
| * |
| * Author: Neels Hofmeyr |
| * |
| * 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_04_08_gprs.h> |
| |
| /*! \brief Information Element Identifiers for OAP IEs. |
| * They match osmo_gsup_iei (so far). */ |
| enum osmo_oap_iei { |
| OAP_CAUSE_IE = 0x02, |
| OAP_RAND_IE = 0x20, |
| OAP_AUTN_IE = 0x23, |
| OAP_XRES_IE = 0x24, |
| OAP_AUTS_IE = 0x25, |
| OAP_CLIENT_ID_IE = 0x30, |
| }; |
| |
| /*! \brief OAP message types */ |
| enum osmo_oap_message_type { |
| OAP_MSGT_REGISTER_REQUEST = 0b00000100, |
| OAP_MSGT_REGISTER_ERROR = 0b00000101, |
| OAP_MSGT_REGISTER_RESULT = 0b00000110, |
| |
| OAP_MSGT_CHALLENGE_REQUEST = 0b00001000, |
| OAP_MSGT_CHALLENGE_ERROR = 0b00001001, |
| OAP_MSGT_CHALLENGE_RESULT = 0b00001010, |
| |
| OAP_MSGT_SYNC_REQUEST = 0b00001100, |
| OAP_MSGT_SYNC_ERROR = 0b00001101, |
| OAP_MSGT_SYNC_RESULT = 0b00001110, |
| }; |
| |
| /*! \brief Parsed/decoded OAP protocol message */ |
| struct osmo_oap_message { |
| enum osmo_oap_message_type message_type; |
| enum gsm48_gmm_cause cause; |
| uint16_t client_id; |
| int rand_present; |
| uint8_t rand[16]; |
| int autn_present; |
| uint8_t autn[16]; |
| int xres_present; |
| uint8_t xres[8]; |
| int auts_present; |
| uint8_t auts[16]; |
| }; |
| |
| int osmo_oap_decode(struct osmo_oap_message *oap_msg, const uint8_t *data, |
| size_t data_len); |
| void osmo_oap_encode(struct msgb *msg, const struct osmo_oap_message *oap_msg); |