mirror of https://github.com/PentHertz/srsLTE.git
EPC now sends service reject to a UE that sends service request with bad integrity.
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dabf586316
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1bac758a85
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@ -242,7 +242,7 @@ public:
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bool pack_esm_information_request(srslte::byte_buffer_t* nas_buffer);
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bool pack_identity_request(srslte::byte_buffer_t* nas_buffer);
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bool pack_emm_information(srslte::byte_buffer_t* nas_buffer);
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bool pack_service_reject(srslte::byte_buffer_t* nas_buffer);
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bool pack_service_reject(srslte::byte_buffer_t* nas_buffer, uint8_t emm_cause);
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bool pack_attach_accept(srslte::byte_buffer_t* nas_buffer);
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/* Security functions */
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@ -571,8 +571,9 @@ bool nas::handle_service_request(uint32_t m_tmsi,
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nas nas_tmp;
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nas_tmp.m_ecm_ctx.enb_ue_s1ap_id = enb_ue_s1ap_id;
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nas_tmp.m_ecm_ctx.mme_ue_s1ap_id = s1ap->get_next_mme_ue_s1ap_id();
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srslte::byte_buffer_t* nas_tx = pool->allocate();
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nas_tmp.pack_service_reject(nas_tx);
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nas_tmp.pack_service_reject(nas_tx, LIBLTE_MME_EMM_CAUSE_IMPLICITLY_DETACHED);
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s1ap->send_downlink_nas_transport(enb_ue_s1ap_id, nas_tmp.m_ecm_ctx.mme_ue_s1ap_id, nas_tx, *enb_sri);
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pool->deallocate(nas_tx);
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return true;
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@ -585,8 +586,9 @@ bool nas::handle_service_request(uint32_t m_tmsi,
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nas nas_tmp;
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nas_tmp.m_ecm_ctx.enb_ue_s1ap_id = enb_ue_s1ap_id;
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nas_tmp.m_ecm_ctx.mme_ue_s1ap_id = s1ap->get_next_mme_ue_s1ap_id();
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srslte::byte_buffer_t* nas_tx = pool->allocate();
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nas_tmp.pack_service_reject(nas_tx);
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srslte::byte_buffer_t* nas_tx = pool->allocate();
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nas_tmp.pack_service_reject(nas_tx, LIBLTE_MME_EMM_CAUSE_IMPLICITLY_DETACHED);
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s1ap->send_downlink_nas_transport(enb_ue_s1ap_id, nas_tmp.m_ecm_ctx.mme_ue_s1ap_id, nas_tx, *enb_sri);
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pool->deallocate(nas_tx);
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return true;
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@ -649,8 +651,15 @@ bool nas::handle_service_request(uint32_t m_tmsi,
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s1ap->send_initial_context_setup_request(imsi, 5);
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sec_ctx->ul_nas_count++;
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} else {
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nas_log->console("Service Request -- Short MAC invalid. Ignoring service request\n");
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nas_log->warning("Service Request -- Short MAC invalid. Ignoring service request\n");
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uint32_t mme_ue_s1ap_id = s1ap->get_next_mme_ue_s1ap_id();
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srslte::byte_buffer_t *nas_tx = pool->allocate();
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nas_ctx->pack_service_reject(nas_tx, LIBLTE_MME_EMM_CAUSE_UE_IDENTITY_CANNOT_BE_DERIVED_BY_THE_NETWORK);
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s1ap->send_downlink_nas_transport(enb_ue_s1ap_id, mme_ue_s1ap_id, nas_tx, *enb_sri);
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pool->deallocate(nas_tx);
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nas_log->console("Service Request -- Short MAC invalid. Sending service reject.\n");
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nas_log->warning("Service Request -- Short MAC invalid. Sending service reject.\n");
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nas_log->info("Service Reject -- eNB_UE_S1AP_ID %d MME_UE_S1AP_ID %d.\n", enb_ue_s1ap_id, mme_ue_s1ap_id);
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}
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return true;
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}
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@ -1368,10 +1377,8 @@ bool nas::pack_emm_information(srslte::byte_buffer_t* nas_buffer)
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return true;
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}
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bool nas::pack_service_reject(srslte::byte_buffer_t* nas_buffer)
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bool nas::pack_service_reject(srslte::byte_buffer_t* nas_buffer, uint8_t emm_cause)
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{
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uint8_t emm_cause = LIBLTE_MME_EMM_CAUSE_IMPLICITLY_DETACHED;
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LIBLTE_MME_SERVICE_REJECT_MSG_STRUCT service_rej;
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service_rej.t3442_present = true;
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service_rej.t3442.unit = LIBLTE_MME_GPRS_TIMER_DEACTIVATED;
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