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137 lines
3.6 KiB
C++
137 lines
3.6 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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/******************************************************************************
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* File: hss.h
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* Description: Top-level HSS class. Creates and links all
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* interfaces and helpers.
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*****************************************************************************/
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#ifndef SRSEPC_HSS_H
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#define SRSEPC_HSS_H
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#include "srsran/common/buffer_pool.h"
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#include "srsran/common/standard_streams.h"
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#include "srsran/interfaces/epc_interfaces.h"
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#include "srsran/srslog/srslog.h"
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#include <cstddef>
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#include <map>
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#define LTE_FDD_ENB_IND_HE_N_BITS 5
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#define LTE_FDD_ENB_IND_HE_MASK 0x1FUL
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#define LTE_FDD_ENB_IND_HE_MAX_VALUE 31
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#define LTE_FDD_ENB_SEQ_HE_MAX_VALUE 0x07FFFFFFFFFFUL
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namespace srsepc {
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struct hss_args_t {
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std::string db_file;
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uint16_t mcc;
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uint16_t mnc;
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};
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enum hss_auth_algo { HSS_ALGO_XOR, HSS_ALGO_MILENAGE };
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struct hss_ue_ctx_t {
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// Members
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std::string name;
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uint64_t imsi;
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enum hss_auth_algo algo;
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uint8_t key[16];
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bool op_configured;
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uint8_t op[16];
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uint8_t opc[16];
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uint8_t amf[2];
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uint8_t sqn[6];
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uint16_t qci;
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uint8_t last_rand[16];
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std::string static_ip_addr;
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// Helper getters/setters
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void set_sqn(const uint8_t* sqn_);
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void set_last_rand(const uint8_t* rand_);
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void get_last_rand(uint8_t* rand_);
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};
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class hss : public hss_interface_nas
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{
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public:
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static hss* get_instance(void);
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static void cleanup(void);
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int init(hss_args_t* hss_args);
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void stop(void);
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virtual bool gen_auth_info_answer(uint64_t imsi, uint8_t* k_asme, uint8_t* autn, uint8_t* rand, uint8_t* xres);
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virtual bool gen_update_loc_answer(uint64_t imsi, uint8_t* qci);
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virtual bool resync_sqn(uint64_t imsi, uint8_t* auts);
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std::map<std::string, uint64_t> get_ip_to_imsi() const;
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private:
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hss();
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virtual ~hss();
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static hss* m_instance;
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std::map<uint64_t, std::unique_ptr<hss_ue_ctx_t> > m_imsi_to_ue_ctx;
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void gen_rand(uint8_t rand_[16]);
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void
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gen_auth_info_answer_milenage(hss_ue_ctx_t* ue_ctx, uint8_t* k_asme, uint8_t* autn, uint8_t* rand, uint8_t* xres);
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void gen_auth_info_answer_xor(hss_ue_ctx_t* ue_ctx, uint8_t* k_asme, uint8_t* autn, uint8_t* rand, uint8_t* xres);
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void resync_sqn_milenage(hss_ue_ctx_t* ue_ctx, uint8_t* auts);
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void resync_sqn_xor(hss_ue_ctx_t* ue_ctx, uint8_t* auts);
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void get_uint_vec_from_hex_str(const std::string& key_str, uint8_t* key, uint len);
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void increment_ue_sqn(hss_ue_ctx_t* ue_ctx);
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void increment_seq_after_resync(hss_ue_ctx_t* ue_ctx);
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void increment_sqn(uint8_t* sqn, uint8_t* next_sqn);
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bool set_auth_algo(std::string auth_algo);
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bool read_db_file(std::string db_file);
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bool write_db_file(std::string db_file);
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hss_ue_ctx_t* get_ue_ctx(uint64_t imsi);
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std::string hex_string(uint8_t* hex, int size);
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std::string db_file;
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/*Logs*/
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srslog::basic_logger& m_logger = srslog::fetch_basic_logger("HSS");
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uint16_t mcc;
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uint16_t mnc;
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std::map<std::string, uint64_t> m_ip_to_imsi;
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};
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inline void hss_ue_ctx_t::set_sqn(const uint8_t* sqn_)
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{
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memcpy(sqn, sqn_, 6);
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}
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inline void hss_ue_ctx_t::set_last_rand(const uint8_t* last_rand_)
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{
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memcpy(last_rand, last_rand_, 16);
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}
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inline void hss_ue_ctx_t::get_last_rand(uint8_t* last_rand_)
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{
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memcpy(last_rand_, last_rand, 16);
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}
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} // namespace srsepc
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#endif // SRSEPC_HSS_H
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