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Regenerating k_eNB on guti attach request.

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master
Pedro Alvarez 7 years ago
parent 79517310d0
commit ba3a579a92
1 changed files with 17 additions and 69 deletions
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82
srsepc/src/mme/s1ap_nas_transport.cc
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@ -257,6 +257,10 @@ s1ap_nas_transport::handle_uplink_nas_transport(LIBLTE_S1AP_MESSAGE_UPLINKNASTRA
m_s1ap_log->info("Uplink NAS: Authentication Failure\n"); m_s1ap_log->info("Uplink NAS: Authentication Failure\n");
handle_authentication_failure(nas_msg, ue_ctx, reply_buffer, reply_flag); handle_authentication_failure(nas_msg, ue_ctx, reply_buffer, reply_flag);
break; break;
/* case LIBLTE_MME_MSG_TYPE_DETACH_REQUEST:
m_s1ap_log->info("Uplink NAS: Detach Request\n");
handle_detach_request(nas_msg, ue_ctx, reply_buffer, reply_flag);
break;*/
default: default:
m_s1ap_log->warning("Unhandled NAS integrity protected message 0x%x\n", msg_type ); m_s1ap_log->warning("Unhandled NAS integrity protected message 0x%x\n", msg_type );
m_s1ap_log->console("Unhandled NAS integrity protected message 0x%x\n", msg_type ); m_s1ap_log->console("Unhandled NAS integrity protected message 0x%x\n", msg_type );
@ -601,6 +605,11 @@ s1ap_nas_transport::handle_nas_guti_attach_request( uint32_t enb_ue_s1ap_id,
//Store context based on MME UE S1AP id //Store context based on MME UE S1AP id
m_s1ap->add_ue_ctx_to_mme_ue_s1ap_id_map(ue_ctx); m_s1ap->add_ue_ctx_to_mme_ue_s1ap_id_map(ue_ctx);
//Re-generate K_eNB
liblte_security_generate_k_enb(emm_ctx->security_ctxt.k_asme, emm_ctx->security_ctxt.ul_nas_count, emm_ctx->security_ctxt.k_enb);
m_s1ap_log->info("Generating KeNB with UL NAS COUNT: %d\n",emm_ctx->security_ctxt.ul_nas_count);
//Create session request //Create session request
m_s1ap_log->console("GUTI Attach -- NAS Integrity OK."); m_s1ap_log->console("GUTI Attach -- NAS Integrity OK.");
m_mme_gtpc->send_create_session_request(emm_ctx->imsi); m_mme_gtpc->send_create_session_request(emm_ctx->imsi);
@ -972,14 +981,6 @@ s1ap_nas_transport::handle_identity_response(srslte::byte_buffer_t *nas_msg, ue_
ue_emm_ctx_t *emm_ctx = &ue_ctx->emm_ctx; ue_emm_ctx_t *emm_ctx = &ue_ctx->emm_ctx;
ue_ecm_ctx_t *ecm_ctx = &ue_ctx->ecm_ctx; ue_ecm_ctx_t *ecm_ctx = &ue_ctx->ecm_ctx;
//Check if EMM context already exists
//ue_ctx_t *ue_tmp_ptr = m_s1ap->find_ue_ctx_from_imsi(imsi);
//if(ue_tmp_ptr != NULL)
//{
// m_s1ap_log->warning("Unkonw GUTI, but UE's EMM context present.\n");
// m_s1ap->delete_ue_emm_ctx(imsi);
//}
m_s1ap_log->info("Id Response -- IMSI: %015lu\n", imsi); m_s1ap_log->info("Id Response -- IMSI: %015lu\n", imsi);
m_s1ap_log->console("Id Response -- IMSI: %015lu\n", imsi); m_s1ap_log->console("Id Response -- IMSI: %015lu\n", imsi);
@ -1039,22 +1040,6 @@ s1ap_nas_transport::handle_tracking_area_update_request(srslte::byte_buffer_t *n
//m_s1ap_log->console("Tracking area accept to MME-UE S1AP Id %d\n", ue_ctx->mme_ue_s1ap_id); //m_s1ap_log->console("Tracking area accept to MME-UE S1AP Id %d\n", ue_ctx->mme_ue_s1ap_id);
LIBLTE_MME_TRACKING_AREA_UPDATE_ACCEPT_MSG_STRUCT tau_acc; LIBLTE_MME_TRACKING_AREA_UPDATE_ACCEPT_MSG_STRUCT tau_acc;
/*
bool t3412_present;
bool guti_present;
bool tai_list_present;
bool eps_bearer_context_status_present;
bool lai_present;
bool ms_id_present;
bool emm_cause_present;
bool t3402_present;
bool t3423_present;
bool equivalent_plmns_present;
bool emerg_num_list_present;
bool eps_network_feature_support_present;
bool additional_update_result_present;
bool t3412_ext_present;
*/
//Get decimal MCC and MNC //Get decimal MCC and MNC
uint32_t mcc = 0; uint32_t mcc = 0;
mcc += 0x000F & m_s1ap->m_s1ap_args.mcc; mcc += 0x000F & m_s1ap->m_s1ap_args.mcc;
@ -1105,46 +1090,6 @@ s1ap_nas_transport::handle_tracking_area_update_request(srslte::byte_buffer_t *n
tau_acc.additional_update_result_present = false; tau_acc.additional_update_result_present = false;
tau_acc.t3412_ext_present = false; tau_acc.t3412_ext_present = false;
//eps_update_result = LIBLTE_MME_TR
/*
typedef struct{
LIBLTE_MME_GPRS_TIMER_STRUCT t3412;
LIBLTE_MME_EPS_MOBILE_ID_STRUCT guti;
LIBLTE_MME_TRACKING_AREA_IDENTITY_LIST_STRUCT tai_list;
LIBLTE_MME_EPS_BEARER_CONTEXT_STATUS_STRUCT eps_bearer_context_status;
LIBLTE_MME_LOCATION_AREA_ID_STRUCT lai;
LIBLTE_MME_MOBILE_ID_STRUCT ms_id;
LIBLTE_MME_GPRS_TIMER_STRUCT t3402;
LIBLTE_MME_GPRS_TIMER_STRUCT t3423;
LIBLTE_MME_PLMN_LIST_STRUCT equivalent_plmns;
LIBLTE_MME_EMERGENCY_NUMBER_LIST_STRUCT emerg_num_list;
LIBLTE_MME_EPS_NETWORK_FEATURE_SUPPORT_STRUCT eps_network_feature_support;
LIBLTE_MME_GPRS_TIMER_3_STRUCT t3412_ext;
LIBLTE_MME_ADDITIONAL_UPDATE_RESULT_ENUM additional_update_result;
uint8 eps_update_result;
uint8 emm_cause;
bool t3412_present;
bool guti_present;
bool tai_list_present;
bool eps_bearer_context_status_present;
bool lai_present;
bool ms_id_present;
bool emm_cause_present;
bool t3402_present;
bool t3423_present;
bool equivalent_plmns_present;
bool emerg_num_list_present;
bool eps_network_feature_support_present;
bool additional_update_result_present;
bool t3412_ext_present;v
}LIBLTE_MME_TRACKING_AREA_UPDATE_ACCEPT_MSG_STRUCT;
*/
//Send reply to eNB
//*reply_flag = true;
return true; return true;
} }
@ -1256,7 +1201,6 @@ s1ap_nas_transport::handle_authentication_failure(srslte::byte_buffer_t *nas_msg
m_s1ap_log->info("User not found. IMSI %015lu\n", emm_ctx->imsi); m_s1ap_log->info("User not found. IMSI %015lu\n", emm_ctx->imsi);
return false; return false;
} }
//Pack NAS Authentication Request in Downlink NAS Transport msg //Pack NAS Authentication Request in Downlink NAS Transport msg
pack_authentication_request(reply_msg, ecm_ctx->enb_ue_s1ap_id, ecm_ctx->mme_ue_s1ap_id, autn, rand); pack_authentication_request(reply_msg, ecm_ctx->enb_ue_s1ap_id, ecm_ctx->mme_ue_s1ap_id, autn, rand);
@ -1269,9 +1213,13 @@ s1ap_nas_transport::handle_authentication_failure(srslte::byte_buffer_t *nas_msg
break; break;
} }
return true; return true;
} }
/*
bool
s1ap_nas_transport::handle_detach_request(nas_msg, ue_ctx, reply_buffer, reply_flag)
{
return true;
}*/
/*Packing/Unpacking helper functions*/ /*Packing/Unpacking helper functions*/
bool bool
s1ap_nas_transport::pack_authentication_request(srslte::byte_buffer_t *reply_msg, uint32_t enb_ue_s1ap_id, uint32_t next_mme_ue_s1ap_id, uint8_t *autn, uint8_t *rand) s1ap_nas_transport::pack_authentication_request(srslte::byte_buffer_t *reply_msg, uint32_t enb_ue_s1ap_id, uint32_t next_mme_ue_s1ap_id, uint8_t *autn, uint8_t *rand)

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