mirror of https://github.com/pvnis/srsRAN_4G.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
186 lines
4.8 KiB
C++
186 lines
4.8 KiB
C++
/**
|
|
*
|
|
* \section COPYRIGHT
|
|
*
|
|
* Copyright 2013-2015 Software Radio Systems Limited
|
|
*
|
|
* \section LICENSE
|
|
*
|
|
* This file is part of the srsUE library.
|
|
*
|
|
* srsUE is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as
|
|
* published by the Free Software Foundation, either version 3 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* srsUE 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 Affero General Public License for more details.
|
|
*
|
|
* A copy of the GNU Affero General Public License can be found in
|
|
* the LICENSE file in the top-level directory of this distribution
|
|
* and at http://www.gnu.org/licenses/.
|
|
*
|
|
*/
|
|
|
|
#ifndef NAS_H
|
|
#define NAS_H
|
|
|
|
#include "srslte/common/buffer_pool.h"
|
|
#include "srslte/common/log.h"
|
|
#include "srslte/common/common.h"
|
|
#include "srslte/interfaces/ue_interfaces.h"
|
|
#include "srslte/common/security.h"
|
|
#include "srslte/asn1/liblte_mme.h"
|
|
|
|
using srslte::byte_buffer_t;
|
|
|
|
namespace srsue {
|
|
|
|
// EMM states (3GPP 24.302 v10.0.0)
|
|
typedef enum {
|
|
EMM_STATE_NULL = 0,
|
|
EMM_STATE_DEREGISTERED,
|
|
EMM_STATE_REGISTERED_INITIATED,
|
|
EMM_STATE_REGISTERED,
|
|
EMM_STATE_SERVICE_REQUEST_INITIATED,
|
|
EMM_STATE_DEREGISTERED_INITIATED,
|
|
EMM_STATE_TAU_INITIATED,
|
|
EMM_STATE_N_ITEMS,
|
|
} emm_state_t;
|
|
static const char emm_state_text[EMM_STATE_N_ITEMS][100] = {"NULL",
|
|
"DEREGISTERED",
|
|
"REGISTERED INITIATED",
|
|
"REGISTERED",
|
|
"SERVICE REQUEST INITIATED",
|
|
"DEREGISTERED INITIATED",
|
|
"TRACKING AREA UPDATE INITIATED"};
|
|
|
|
typedef enum {
|
|
PLMN_NOT_SELECTED = 0,
|
|
PLMN_SELECTED
|
|
} plmn_selection_state_t;
|
|
|
|
class nas
|
|
: public nas_interface_rrc, public nas_interface_ue {
|
|
public:
|
|
nas();
|
|
|
|
void init(usim_interface_nas *usim_,
|
|
rrc_interface_nas *rrc_,
|
|
gw_interface_nas *gw_,
|
|
srslte::log *nas_log_);
|
|
|
|
void stop();
|
|
|
|
emm_state_t get_state();
|
|
|
|
// RRC interface
|
|
void notify_connection_setup();
|
|
|
|
void write_pdu(uint32_t lcid, byte_buffer_t *pdu);
|
|
|
|
uint32_t get_ul_count();
|
|
|
|
bool is_attached();
|
|
|
|
bool get_s_tmsi(LIBLTE_RRC_S_TMSI_STRUCT *s_tmsi);
|
|
|
|
void plmn_found(LIBLTE_RRC_PLMN_IDENTITY_STRUCT plmn_id, uint16_t tracking_area_code);
|
|
|
|
void cell_selected();
|
|
|
|
// UE interface
|
|
void attach_request();
|
|
|
|
void deattach_request();
|
|
|
|
private:
|
|
srslte::byte_buffer_pool *pool;
|
|
srslte::log *nas_log;
|
|
rrc_interface_nas *rrc;
|
|
usim_interface_nas *usim;
|
|
gw_interface_nas *gw;
|
|
|
|
emm_state_t state;
|
|
|
|
plmn_selection_state_t plmn_selection;
|
|
LIBLTE_RRC_PLMN_IDENTITY_STRUCT current_plmn;
|
|
LIBLTE_RRC_PLMN_IDENTITY_STRUCT home_plmn;
|
|
|
|
std::vector<LIBLTE_RRC_PLMN_IDENTITY_STRUCT > known_plmns;
|
|
|
|
// Save short MAC
|
|
|
|
// Identifiers
|
|
LIBLTE_MME_EPS_MOBILE_ID_GUTI_STRUCT guti;
|
|
bool is_guti_set;
|
|
|
|
uint32_t ip_addr;
|
|
uint8_t eps_bearer_id;
|
|
|
|
uint8_t transaction_id;
|
|
|
|
// NAS counters - incremented for each security-protected message recvd/sent
|
|
uint32_t count_ul;
|
|
uint32_t count_dl;
|
|
|
|
// Security
|
|
uint8_t ksi;
|
|
uint8_t k_nas_enc[32];
|
|
uint8_t k_nas_int[32];
|
|
|
|
srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo;
|
|
srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo;
|
|
|
|
void integrity_generate(uint8_t *key_128,
|
|
uint32_t count,
|
|
uint8_t rb_id,
|
|
uint8_t direction,
|
|
uint8_t *msg,
|
|
uint32_t msg_len,
|
|
uint8_t *mac);
|
|
|
|
void integrity_check();
|
|
|
|
void cipher_encrypt();
|
|
|
|
void cipher_decrypt();
|
|
|
|
// Parsers
|
|
void parse_attach_accept(uint32_t lcid, byte_buffer_t *pdu);
|
|
|
|
void parse_attach_reject(uint32_t lcid, byte_buffer_t *pdu);
|
|
|
|
void parse_authentication_request(uint32_t lcid, byte_buffer_t *pdu);
|
|
|
|
void parse_authentication_reject(uint32_t lcid, byte_buffer_t *pdu);
|
|
|
|
void parse_identity_request(uint32_t lcid, byte_buffer_t *pdu);
|
|
|
|
void parse_security_mode_command(uint32_t lcid, byte_buffer_t *pdu);
|
|
|
|
void parse_service_reject(uint32_t lcid, byte_buffer_t *pdu);
|
|
|
|
void parse_esm_information_request(uint32_t lcid, byte_buffer_t *pdu);
|
|
|
|
void parse_emm_information(uint32_t lcid, byte_buffer_t *pdu);
|
|
|
|
// Senders
|
|
void send_attach_request();
|
|
|
|
void send_identity_response();
|
|
|
|
void send_service_request();
|
|
|
|
void send_esm_information_response();
|
|
|
|
void gen_pdn_connectivity_request(LIBLTE_BYTE_MSG_STRUCT *msg);
|
|
};
|
|
|
|
} // namespace srsue
|
|
|
|
|
|
#endif // NAS_H
|