Moving many of the functions fron s1ap_nas_transport to it's own NAS class.
This commit is contained in:
Pedro Alvarez
parent
41a5788cc7
commit
4c164acbc3
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@ -30,7 +30,8 @@
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#include "srslte/common/log_filter.h"
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#include "srslte/common/buffer_pool.h"
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#include "srslte/asn1/gtpc.h"
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#include "s1ap_common.h"
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#include "nas.h"
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namespace srsepc
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{
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@ -53,7 +54,7 @@ public:
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uint32_t get_new_ctrl_teid();
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void send_create_session_request(uint64_t imsi);
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void handle_create_session_response(srslte::gtpc_pdu *cs_resp_pdu);
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void send_modify_bearer_request(uint64_t imsi, erab_ctx_t *bearer_ctx);
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void send_modify_bearer_request(uint64_t imsi, esm_ctx_t *bearer_ctx);
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void handle_modify_bearer_response(srslte::gtpc_pdu *mb_resp_pdu);
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void send_release_access_bearers_request(uint64_t imsi);
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void send_delete_session_request(uint64_t imsi);
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@ -18,8 +18,8 @@
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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_COMMON_H
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#define SRSEPC_S1AP_COMMON_H
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#ifndef SRSEPC_NAS_H
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#define SRSEPC_NAS_H
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#include "srslte/common/security.h"
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#include "srslte/asn1/gtpc_ies.h"
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@ -76,34 +76,30 @@ static const char esm_state_text[ESM_STATE_N_ITEMS][100] = {"CONTEXT INACTIVE",
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* EMM, ECM, ESM and EPS Security context definition
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*/
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typedef struct{
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uint64_t imsi;
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LIBLTE_MME_EPS_MOBILE_ID_GUTI_STRUCT guti;
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eps_sec_ctx_t security_ctxt;
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uint8_t procedure_transaction_id;
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uint64_t imsi;
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emm_state_t state;
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uint32_t mme_ue_s1ap_id;
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uint8_t attach_type;
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uint8_t procedure_transaction_id;
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uint8_t attach_type;
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struct in_addr ue_ip;
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srslte::gtpc_f_teid_ie sgw_ctrl_fteid;
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} emm_ctx_t;
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typedef struct{
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uint64_t imsi;
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ecm_state_t state;
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uint32_t enb_ue_s1ap_id;
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uint32_t mme_ue_s1ap_id;
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struct sctp_sndrcvinfo enb_sri;
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ecm_state_t state;
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bool eit;
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} ecm_ctx_t;
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typedef struct{
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enum erab_state state;
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uint8_t erab_id;
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esm_state_t state;
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uint8_t qci;
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srslte::gtpc_f_teid_ie enb_fteid;
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srslte::gtpc_f_teid_ie sgw_s1u_fteid;
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srslte::gtpc_pdn_address_allocation_ie pdn_addr_alloc;
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} erab_ctx_t;
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} esm_ctx_t;
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typedef struct{
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uint8_t eksi;
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@ -119,6 +115,7 @@ typedef struct{
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LIBLTE_MME_UE_NETWORK_CAPABILITY_STRUCT ue_network_cap;
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bool ms_network_cap_present;
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LIBLTE_MME_MS_NETWORK_CAPABILITY_STRUCT ms_network_cap;
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LIBLTE_MME_EPS_MOBILE_ID_GUTI_STRUCT guti;
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} sec_ctx_t;
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class nas
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@ -168,28 +165,28 @@ public:
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struct sctp_sndrcvinfo *enb_sri);
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/* Uplink NAS messages handling */
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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_buffer, 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_buffer, 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_buffer, 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_buffer, bool *reply_flag);
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bool handle_nas_authentication_response( srslte::byte_buffer_t *nas_msg, 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, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool handle_nas_attach_complete( srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool handle_esm_information_response( srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool handle_identity_response( srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool handle_tracking_area_update_request( srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool handle_authentication_failure( srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool handle_nas_detach_request( srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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/* Downlink NAS messages packing*/
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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 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_security_mode_command( srslte::byte_buffer_t *reply_msg, emm_ctx_t *ue_emm_ctx, ecm_ctx_t *ue_ecm_ctx);
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bool pack_esm_information_request( srslte::byte_buffer_t *reply_msg, emm_ctx_t *ue_emm_ctx, 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_emm_information( 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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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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bool pack_attach_accept( emm_ctx_t *ue_emm_ctx, 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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/* Security functions */
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bool integrity_check( ue_emm_ctx_t *emm_ctx, srslte::byte_buffer_t *pdu);
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bool short_integrity_check( ue_emm_ctx_t *emm_ctx, srslte::byte_buffer_t *pdu);
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bool integrity_check( emm_ctx_t *emm_ctx, srslte::byte_buffer_t *pdu);
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bool short_integrity_check( emm_ctx_t *emm_ctx, srslte::byte_buffer_t *pdu);
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private:
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emm_ctx_t m_emm_ctx;
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@ -41,7 +41,7 @@
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#include <unistd.h>
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#include <map>
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#include <set>
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#include "s1ap_common.h"
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#include "nas.h"
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#include "s1ap_mngmt_proc.h"
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#include "s1ap_nas_transport.h"
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#include "s1ap_ctx_mngmt_proc.h"
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@ -82,12 +82,12 @@ public:
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void add_new_enb_ctx(const enb_ctx_t &enb_ctx, const struct sctp_sndrcvinfo* enb_sri);
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void get_enb_ctx(uint16_t sctp_stream);
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bool add_ue_ctx_to_imsi_map(ue_ctx_t *ue_ctx);
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bool add_ue_ctx_to_mme_ue_s1ap_id_map(ue_ctx_t *ue_ctx);
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bool add_nas_ctx_to_imsi_map(nas *nas_ctx);
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bool add_nas_ctx_to_mme_ue_s1ap_id_map(nas *nas_ctx);
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bool add_ue_to_enb_set(int32_t enb_assoc, uint32_t mme_ue_s1ap_id);
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ue_ctx_t* find_ue_ctx_from_imsi(uint64_t imsi);
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ue_ctx_t* find_ue_ctx_from_mme_ue_s1ap_id(uint32_t mme_ue_s1ap_id);
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nas* find_nas_ctx_from_imsi(uint64_t imsi);
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nas* find_nas_ctx_from_mme_ue_s1ap_id(uint32_t mme_ue_s1ap_id);
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bool release_ue_ecm_ctx(uint32_t mme_ue_s1ap_id);
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void release_ues_ecm_ctx_in_enb(int32_t enb_assoc);
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@ -102,7 +102,7 @@ public:
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s1ap_nas_transport* m_s1ap_nas_transport;
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s1ap_ctx_mngmt_proc* m_s1ap_ctx_mngmt_proc;
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std::map<uint32_t, uint64_t> m_tmsi_to_imsi;
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std::map<uint32_t, uint64_t> m_tmsi_to_imsi;
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private:
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s1ap();
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@ -119,8 +119,8 @@ private:
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std::map<int32_t, uint16_t> m_sctp_to_enb_id;
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std::map<int32_t,std::set<uint32_t> > m_enb_assoc_to_ue_ids;
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std::map<uint64_t, ue_ctx_t*> m_imsi_to_ue_ctx;
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std::map<uint32_t, ue_ctx_t*> m_mme_ue_s1ap_id_to_ue_ctx;
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std::map<uint64_t, nas*> m_imsi_to_nas_ctx;
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std::map<uint32_t, nas*> m_mme_ue_s1ap_id_to_nas_ctx;
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uint32_t m_next_mme_ue_s1ap_id;
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uint32_t m_next_m_tmsi;
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@ -28,60 +28,9 @@
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#include <netinet/sctp.h>
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namespace srsepc{
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static const uint8_t MAX_TA=255; //Maximum TA supported
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static const uint8_t MAX_BPLMN=6; //Maximum broadcasted PLMNs per TAC
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static const uint8_t MAX_ERABS_PER_UE = 16;
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// MME EMM states (3GPP 24.301 v10.0.0, section 5.1.3.4)
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typedef enum {
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EMM_STATE_DEREGISTERED = 0,
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EMM_STATE_COMMON_PROCEDURE_INITIATED,
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EMM_STATE_REGISTERED,
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EMM_STATE_DEREGISTERED_INITIATED,
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EMM_STATE_N_ITEMS,
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} emm_state_t;
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static const char emm_state_text[EMM_STATE_N_ITEMS][100] = {"DEREGISTERED",
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"COMMON PROCEDURE INITIATED",
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"REGISTERED",
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"DEREGISTERED INITIATED"};
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// MME ECM states (3GPP 23.401 v10.0.0, section 4.6.3)
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typedef enum {
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ECM_STATE_IDLE = 0,
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ECM_STATE_CONNECTED,
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ECM_STATE_N_ITEMS,
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} ecm_state_t;
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static const char ecm_state_text[ECM_STATE_N_ITEMS][100] = {"IDLE",
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"CONNECTED"};
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// MME ESM states (3GPP 23.401 v10.0.0, section 4.6.3)
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typedef enum {
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ESM_BEARER_CONTEXT_INACTIVE = 0,
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ESM_BEARER_CONTEXT_ACTIVE_PENDING,
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ESM_BEARER_CONTEXT_ACTIVE,
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ESM_BEARER_CONTEXT_INACTIVE_PENDING,
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ESM_BEARER_CONTEXT_MODIFY_PENDING,
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ESM_BEARER_PROCEDURE_TRANSACTION_INACTIVE,
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ESM_BEARER_PROCEDURE_TRANSACTION_PENDING,
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ESM_STATE_N_ITEMS,
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} esm_state_t;
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static const char esm_state_text[ESM_STATE_N_ITEMS][100] = {"CONTEXT INACTIVE",
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"CONTEXT ACTIVE PENDING",
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"CONTEXT ACTIVE",
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"CONTEXT_INACTIVE_PENDING",
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"CONTEXT_MODIFY_PENDING",
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"PROCEDURE_TRANSACTION_INACTIVE"
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"PROCEDURE_TRANSACTION_PENDING"};
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enum erab_state
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{
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ERAB_DEACTIVATED,
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ERAB_CTX_REQUESTED,
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ERAB_CTX_SETUP,
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ERAB_ACTIVE
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};
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typedef struct{
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uint8_t mme_code;
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struct sctp_sndrcvinfo sri;
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} enb_ctx_t;
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typedef struct{
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uint8_t eksi;
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uint8_t k_asme[32];
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uint8_t xres[16]; //minimum 6, maximum 16
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uint32_t dl_nas_count;
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uint32_t ul_nas_count;
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srslte::CIPHERING_ALGORITHM_ID_ENUM cipher_algo;
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srslte::INTEGRITY_ALGORITHM_ID_ENUM integ_algo;
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uint8_t k_nas_enc[32];
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uint8_t k_nas_int[32];
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uint8_t k_enb[32];
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LIBLTE_MME_UE_NETWORK_CAPABILITY_STRUCT ue_network_cap;
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bool ms_network_cap_present;
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LIBLTE_MME_MS_NETWORK_CAPABILITY_STRUCT ms_network_cap;
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} eps_sec_ctx_t;
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typedef struct{
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enum erab_state state;
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uint8_t erab_id;
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uint8_t qci;
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srslte::gtpc_f_teid_ie enb_fteid;
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srslte::gtpc_f_teid_ie sgw_s1u_fteid;
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srslte::gtpc_pdn_address_allocation_ie pdn_addr_alloc;
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} erab_ctx_t;
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typedef struct{
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uint64_t imsi;
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LIBLTE_MME_EPS_MOBILE_ID_GUTI_STRUCT guti;
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eps_sec_ctx_t security_ctxt;
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uint8_t procedure_transaction_id;
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emm_state_t state;
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uint32_t mme_ue_s1ap_id;
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uint8_t attach_type;
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struct in_addr ue_ip;
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srslte::gtpc_f_teid_ie sgw_ctrl_fteid;
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} ue_emm_ctx_t;
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typedef struct{
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uint64_t imsi;
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uint32_t enb_ue_s1ap_id;
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uint32_t mme_ue_s1ap_id;
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struct sctp_sndrcvinfo enb_sri;
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ecm_state_t state;
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erab_ctx_t erabs_ctx[MAX_ERABS_PER_UE];
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bool eit;
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} ue_ecm_ctx_t;
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typedef struct{
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ue_emm_ctx_t emm_ctx;
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eps_sec_ctx_t sec_ctx;
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ue_ecm_ctx_t ecm_ctx;
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} ue_ctx_t;
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}//namespace
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#endif // SRSEPC_S1AP_COMMON_H
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@ -47,11 +47,10 @@ public:
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void init(void);
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//bool send_initial_context_setup_request(uint32_t mme_ue_s1ap_id, struct srslte::gtpc_create_session_response *cs_resp, struct srslte::gtpc_f_teid_ie sgw_ctrl_fteid);
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bool send_initial_context_setup_request(ue_emm_ctx_t *emm_ctx, ue_ecm_ctx_t *ecm_ctx, erab_ctx_t *erab_ctx);
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bool send_initial_context_setup_request(emm_ctx_t *emm_ctx, ecm_ctx_t *ecm_ctx, esm_ctx_t *esm_ctx);
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bool handle_initial_context_setup_response(LIBLTE_S1AP_MESSAGE_INITIALCONTEXTSETUPRESPONSE_STRUCT *in_ctxt_resp);
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bool handle_ue_context_release_request(LIBLTE_S1AP_MESSAGE_UECONTEXTRELEASEREQUEST_STRUCT *ue_rel, struct sctp_sndrcvinfo *enb_sri, srslte::byte_buffer_t *reply_buffer, bool *reply_flag);
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bool send_ue_context_release_command(ue_ecm_ctx_t *ecm_ctx, srslte::byte_buffer_t *reply_buffer);
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bool send_ue_context_release_command(ecm_ctx_t *ecm_ctx, srslte::byte_buffer_t *reply_buffer);
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bool handle_ue_context_release_complete(LIBLTE_S1AP_MESSAGE_UECONTEXTRELEASECOMPLETE_STRUCT *rel_comp);
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private:
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