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141 lines
7.4 KiB
C++
141 lines
7.4 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2017 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of srsLTE.
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*
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* srsLTE 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
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE 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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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#ifndef SRSEPC_S1AP_NAS_TRANSPORT_H
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#define SRSEPC_S1AP_NAS_TRANSPORT_H
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#include "srslte/asn1/liblte_s1ap.h"
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#include "srslte/common/buffer_pool.h"
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#include "s1ap_common.h"
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#include "srslte/asn1/gtpc.h"
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#include "srsepc/hdr/hss/hss.h"
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#include "mme_gtpc.h"
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namespace srsepc{
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class s1ap_nas_transport
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{
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public:
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static s1ap_nas_transport* m_instance;
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static s1ap_nas_transport* get_instance(void);
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static void cleanup(void);
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void init(hss_interface_s1ap * hss_);
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bool handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *init_ue, struct sctp_sndrcvinfo *enb_sri, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool handle_uplink_nas_transport(LIBLTE_S1AP_MESSAGE_UPLINKNASTRANSPORT_STRUCT *ul_xport, struct sctp_sndrcvinfo *enb_sri, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool pack_attach_accept(ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *ue_ecm_ctx, LIBLTE_S1AP_E_RABTOBESETUPITEMCTXTSUREQ_STRUCT *erab_ctxt, struct srslte::gtpc_pdn_address_allocation_ie *paa, srslte::byte_buffer_t *nas_buffer);
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private:
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s1ap_nas_transport();
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virtual ~s1ap_nas_transport();
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srslte::log *m_s1ap_log;
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srslte::byte_buffer_pool *m_pool;
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s1ap* m_s1ap;
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hss_interface_s1ap* m_hss;
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mme_gtpc* m_mme_gtpc;
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//Initial UE messages
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bool handle_nas_attach_request( uint32_t enb_ue_s1ap_id,
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srslte::byte_buffer_t *nas_msg,
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srslte::byte_buffer_t *reply_buffer,
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bool* reply_flag,
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struct sctp_sndrcvinfo *enb_sri);
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bool handle_nas_imsi_attach_request(uint32_t enb_ue_s1ap_id,
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const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT &attach_req,
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const LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT &pdn_con_req,
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srslte::byte_buffer_t *reply_buffer,
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bool* reply_flag,
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struct sctp_sndrcvinfo *enb_sri);
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bool handle_nas_guti_attach_request(uint32_t enb_ue_s1ap_id,
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const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT &attach_req,
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const LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT &pdn_con_req,
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srslte::byte_buffer_t *nas_msg,
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srslte::byte_buffer_t *reply_buffer,
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bool* reply_flag,
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struct sctp_sndrcvinfo *enb_sri);
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bool handle_nas_service_request(uint32_t m_tmsi,
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uint32_t enb_ue_s1ap_id,
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srslte::byte_buffer_t *nas_msg,
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srslte::byte_buffer_t *reply_buffer,
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bool* reply_flag,
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struct sctp_sndrcvinfo *enb_sri);
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bool handle_nas_detach_request(uint32_t m_tmsi,
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uint32_t enb_ue_s1ap_id,
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srslte::byte_buffer_t *nas_msg,
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srslte::byte_buffer_t *reply_buffer,
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bool* reply_flag,
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struct sctp_sndrcvinfo *enb_sri);
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bool handle_nas_tracking_area_update_request( uint32_t m_tmsi,
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uint32_t enb_ue_s1ap_id,
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srslte::byte_buffer_t *nas_msg,
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srslte::byte_buffer_t *reply_buffer,
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bool* reply_flag,
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struct sctp_sndrcvinfo *enb_sri);
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bool handle_nas_authentication_response(srslte::byte_buffer_t *nas_msg, ue_ctx_t *ue_ctx, srslte::byte_buffer_t *reply_buffer, bool* reply_flag);
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bool handle_nas_security_mode_complete(srslte::byte_buffer_t *nas_msg, ue_ctx_t *ue_ctx, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool handle_nas_attach_complete(srslte::byte_buffer_t *nas_msg, ue_ctx_t *ue_ctx, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool handle_esm_information_response(srslte::byte_buffer_t *nas_msg, ue_ctx_t* ue_ctx, srslte::byte_buffer_t *reply_msg, bool *reply_flag);
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bool handle_identity_response(srslte::byte_buffer_t *nas_msg, ue_ctx_t* ue_ctx, srslte::byte_buffer_t *reply_msg, bool *reply_flag);
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bool handle_tracking_area_update_request(srslte::byte_buffer_t *nas_msg, ue_ctx_t* ue_ctx, srslte::byte_buffer_t *reply_msg, bool *reply_flag);
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bool handle_authentication_failure(srslte::byte_buffer_t *nas_msg, ue_ctx_t* ue_ctx, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool handle_nas_detach_request(srslte::byte_buffer_t *nas_msg, ue_ctx_t* ue_ctx, srslte::byte_buffer_t *reply_msg, bool *reply_flag);
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bool integrity_check(eps_sec_ctx_t * sec_ctxt, srslte::byte_buffer_t *pdu);
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bool short_integrity_check(eps_sec_ctx_t * sec_ctxt, srslte::byte_buffer_t *pdu);
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bool pack_authentication_request(srslte::byte_buffer_t *reply_msg, uint32_t enb_ue_s1ap_id, uint32_t next_mme_ue_s1ap_id, uint8_t eksi, uint8_t *autn, uint8_t *rand);
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bool pack_authentication_reject(srslte::byte_buffer_t *reply_msg, uint32_t enb_ue_s1ap_id, uint32_t mme_ue_s1ap_id);
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bool unpack_authentication_response(LIBLTE_S1AP_MESSAGE_UPLINKNASTRANSPORT_STRUCT *ul_xport, LIBLTE_MME_AUTHENTICATION_RESPONSE_MSG_STRUCT *auth_resp);
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bool pack_security_mode_command(srslte::byte_buffer_t *reply_msg, ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *ue_ecm_ctx);
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bool pack_esm_information_request(srslte::byte_buffer_t *reply_msg, ue_emm_ctx_t *ue_emm_ctx, ue_ecm_ctx_t *ue_ecm_ctx);
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bool pack_identity_request(srslte::byte_buffer_t *reply_msg, uint32_t enb_ue_s1ap_id, uint32_t mme_ue_s1ap_id);
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bool pack_emm_information(ue_ctx_t* ue_ctx, srslte::byte_buffer_t *reply_msg);
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bool pack_service_reject(srslte::byte_buffer_t *reply_msg, uint8_t emm_cause, uint32_t enb_ue_s1ap_id);
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void log_unhandled_attach_request_ies(const LIBLTE_MME_ATTACH_REQUEST_MSG_STRUCT *attach_req);
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void log_unhandled_pdn_con_request_ies(const LIBLTE_MME_PDN_CONNECTIVITY_REQUEST_MSG_STRUCT *pdn_con_req);
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void log_unhandled_initial_ue_message_ies(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *init_ue);
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void cipher_decrypt(eps_sec_ctx_t *sec_ctxt, srslte::byte_buffer_t *pdu);
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void cipher_encrypt(eps_sec_ctx_t *sec_ctxt, srslte::byte_buffer_t *pdu);
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void integrity_generate(eps_sec_ctx_t *sec_ctxt,
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srslte::byte_buffer_t *pdu,
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uint8_t *mac);
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};
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} //namespace srsepc
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#endif // SRSEPC_S1AP_NAS_TRANSPORT_H
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