mirror of https://github.com/PentHertz/srsLTE.git
Changing send initial context setup request to not need the create session response struct.
This commit is contained in:
parent
82b3e5e380
commit
4ee08fdeca
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@ -47,7 +47,9 @@ 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(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, uint16_t erab_id,
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struct srslte::gtpc_f_teid_ie sgw_ctrl_fteid, struct srslte::gtpc_f_teid_ie sgw_s1u_fteid, struct srslte::gtpc_pdn_address_allocation_ie pdn_addr_aloc);
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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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@ -77,7 +77,12 @@ s1ap_ctx_mngmt_proc::init(void)
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}
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bool
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s1ap_ctx_mngmt_proc::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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s1ap_ctx_mngmt_proc::send_initial_context_setup_request(ue_emm_ctx_t *emm_ctx,
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ue_ecm_ctx_t *ecm_ctx,
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uint16_t erab_id,
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struct srslte::gtpc_f_teid_ie sgw_ctrl_fteid,
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struct srslte::gtpc_f_teid_ie sgw_s1u_fteid,
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struct srslte::gtpc_pdn_address_allocation_ie pdn_addr_alloc)
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{
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int s1mme = m_s1ap->get_s1_mme();
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@ -97,23 +102,9 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
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m_s1ap_log->info("Preparing to send Initial Context Setup request\n");
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//Find UE Context
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ue_ecm_ctx_t *ue_ecm_ctx = m_s1ap->find_ue_ecm_ctx_from_mme_ue_s1ap_id(mme_ue_s1ap_id);
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if(ue_ecm_ctx == NULL)
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{
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m_s1ap_log->error("Could not find UE to send Setup Context Request. MME S1AP Id: %d", mme_ue_s1ap_id);
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return false;
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}
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ue_emm_ctx_t *ue_emm_ctx = m_s1ap->find_ue_emm_ctx_from_imsi(ue_ecm_ctx->imsi);
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if(ue_emm_ctx == NULL)
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{
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m_s1ap_log->error("Could not find UE to send Setup Context Request. MME S1AP Id: %d", mme_ue_s1ap_id);
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return false;
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}
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//Add MME and eNB S1AP Ids
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in_ctxt_req->MME_UE_S1AP_ID.MME_UE_S1AP_ID = ue_ecm_ctx->mme_ue_s1ap_id;
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in_ctxt_req->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = ue_ecm_ctx->enb_ue_s1ap_id;
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in_ctxt_req->MME_UE_S1AP_ID.MME_UE_S1AP_ID = ecm_ctx->mme_ue_s1ap_id;
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in_ctxt_req->eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = ecm_ctx->enb_ue_s1ap_id;
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//Set UE-AMBR
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in_ctxt_req->uEaggregateMaximumBitrate.uEaggregateMaximumBitRateDL.BitRate=1000000000;
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@ -121,7 +112,7 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
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//Setup eRAB context
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in_ctxt_req->E_RABToBeSetupListCtxtSUReq.len = 1;
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erab_ctxt->e_RAB_ID.E_RAB_ID = cs_resp->eps_bearer_context_created.ebi;
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erab_ctxt->e_RAB_ID.E_RAB_ID = erab_id;
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//Setup E-RAB QoS parameters
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erab_ctxt->e_RABlevelQoSParameters.qCI.QCI = 9;
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erab_ctxt->e_RABlevelQoSParameters.allocationRetentionPriority.priorityLevel.PriorityLevel = 15 ;//Lowest
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@ -131,25 +122,25 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
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erab_ctxt->e_RABlevelQoSParameters.gbrQosInformation_present=false;
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//Set E-RAB S-GW F-TEID
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if (cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid_present == false){
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m_s1ap_log->error("Did not receive S1-U TEID in create session response\n");
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return false;
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}
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//if (cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid_present == false){
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// m_s1ap_log->error("Did not receive S1-U TEID in create session response\n");
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// return false;
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//}
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erab_ctxt->transportLayerAddress.n_bits = 32; //IPv4
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uint32_t sgw_s1u_ip = htonl(cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid.ipv4);
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uint32_t sgw_s1u_ip = htonl(sgw_s1u_fteid.ipv4);
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//uint32_t sgw_s1u_ip = cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid.ipv4;
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uint8_t *tmp_ptr = erab_ctxt->transportLayerAddress.buffer;
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liblte_value_2_bits(sgw_s1u_ip, &tmp_ptr, 32);//FIXME consider ipv6
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uint32_t tmp_teid = cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid.teid;
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memcpy(erab_ctxt->gTP_TEID.buffer, &tmp_teid, sizeof(uint32_t));
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uint32_t sgw_s1u_teid = sgw_s1u_fteid.teid;
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memcpy(erab_ctxt->gTP_TEID.buffer, &sgw_s1u_teid, sizeof(uint32_t));
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//Set UE security capabilities and k_enb
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bzero(in_ctxt_req->UESecurityCapabilities.encryptionAlgorithms.buffer,sizeof(uint8_t)*16);
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bzero(in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer,sizeof(uint8_t)*16);
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for(int i = 0; i<3; i++)
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{
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if(ue_emm_ctx->security_ctxt.ue_network_cap.eea[i+1] == true)
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if(emm_ctx->security_ctxt.ue_network_cap.eea[i+1] == true)
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{
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in_ctxt_req->UESecurityCapabilities.encryptionAlgorithms.buffer[i] = 1; //EEA supported
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}
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@ -157,7 +148,7 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
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{
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in_ctxt_req->UESecurityCapabilities.encryptionAlgorithms.buffer[i] = 0; //EEA not supported
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}
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if(ue_emm_ctx->security_ctxt.ue_network_cap.eia[i+1] == true)
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if(emm_ctx->security_ctxt.ue_network_cap.eia[i+1] == true)
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{
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in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer[i] = 1; //EEA supported
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}
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@ -168,21 +159,22 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
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// in_ctxt_req->UESecurityCapabilities.integrityProtectionAlgorithms.buffer[0] = 1; //EIA1
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}
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//Get K eNB
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liblte_unpack(ue_emm_ctx->security_ctxt.k_enb, 32, in_ctxt_req->SecurityKey.buffer);
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m_s1ap_log->info_hex(ue_emm_ctx->security_ctxt.k_enb, 32, "Initial Context Setup Request -- Key eNB\n");
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liblte_unpack(emm_ctx->security_ctxt.k_enb, 32, in_ctxt_req->SecurityKey.buffer);
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m_s1ap_log->info_hex(emm_ctx->security_ctxt.k_enb, 32, "Initial Context Setup Request -- Key eNB\n");
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//Set Attach accepted and activat default bearer NAS messages
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if(cs_resp->paa_present != true)
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{
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m_s1ap_log->error("PAA not present\n");
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return false;
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}
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if(cs_resp->paa.pdn_type != srslte::GTPC_PDN_TYPE_IPV4)
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{
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m_s1ap_log->error("IPv6 not supported yet\n");
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return false;
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}
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//if(cs_resp->paa_present != true)
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//{
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// m_s1ap_log->error("PDN Adress Allocation not present\n");
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// return false;
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//}
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//if(cs_resp->paa.pdn_type != srslte::GTPC_PDN_TYPE_IPV4)
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//{
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// m_s1ap_log->error("IPv6 not supported yet\n");
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// return false;
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//}
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srslte::byte_buffer_t *nas_buffer = m_pool->allocate();
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m_s1ap_nas_transport->pack_attach_accept(ue_emm_ctx, ue_ecm_ctx, erab_ctxt, &cs_resp->paa, nas_buffer);
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m_s1ap_nas_transport->pack_attach_accept(emm_ctx, ecm_ctx, erab_ctxt, &pdn_addr_alloc, nas_buffer);
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LIBLTE_ERROR_ENUM err = liblte_s1ap_pack_s1ap_pdu(&pdu, (LIBLTE_BYTE_MSG_STRUCT*)reply_buffer);
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@ -192,7 +184,7 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
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return false;
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}
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//Send Reply to eNB
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ssize_t n_sent = sctp_send(s1mme,reply_buffer->msg, reply_buffer->N_bytes, &ue_ecm_ctx->enb_sri, 0);
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ssize_t n_sent = sctp_send(s1mme,reply_buffer->msg, reply_buffer->N_bytes, &ecm_ctx->enb_sri, 0);
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if(n_sent == -1)
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{
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m_s1ap_log->error("Failed to send Initial Context Setup Request\n");
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@ -200,16 +192,16 @@ s1ap_ctx_mngmt_proc::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id,
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}
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//Change E-RAB state to Context Setup Requested and save S-GW control F-TEID
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ue_ecm_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].state = ERAB_CTX_REQUESTED;
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ue_ecm_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].sgw_ctrl_fteid.teid = sgw_ctrl_fteid.teid;
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ue_ecm_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].sgw_ctrl_fteid.ipv4 = sgw_ctrl_fteid.ipv4;
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ecm_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].state = ERAB_CTX_REQUESTED;
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ecm_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].sgw_ctrl_fteid.teid = sgw_ctrl_fteid.teid;
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ecm_ctx->erabs_ctx[erab_ctxt->e_RAB_ID.E_RAB_ID].sgw_ctrl_fteid.ipv4 = sgw_ctrl_fteid.ipv4;
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struct in_addr addr;
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addr.s_addr = htonl(sgw_s1u_ip);
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m_s1ap_log->info("Sent Intial Context Setup Request. E-RAB id %d \n",erab_ctxt->e_RAB_ID.E_RAB_ID);
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m_s1ap_log->info("Initial Context -- S1-U TEID 0x%x. IP %s \n", tmp_teid,inet_ntoa(addr));
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m_s1ap_log->info("Initial Context -- S1-U TEID 0x%x. IP %s \n", sgw_s1u_teid,inet_ntoa(addr));
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m_s1ap_log->console("Sent Intial Context Setup Request, E-RAB id %d\n",erab_ctxt->e_RAB_ID.E_RAB_ID);
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m_s1ap_log->console("Initial Context -- S1-U TEID 0x%x. IP %s \n", tmp_teid,inet_ntoa(addr));
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m_s1ap_log->console("Initial Context -- S1-U TEID 0x%x. IP %s \n", sgw_s1u_teid,inet_ntoa(addr));
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m_pool->deallocate(reply_buffer);
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m_pool->deallocate(nas_buffer);
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@ -378,7 +378,6 @@ s1ap_nas_transport::handle_nas_imsi_attach_request(uint32_t enb_ue_s1ap_id,
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//Save whether secure ESM information transfer is necessary
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ue_ecm_ctx.eit = pdn_con_req.esm_info_transfer_flag_present;
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//Add eNB info to UE ctxt
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//Initialize E-RABs
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for(uint i = 0 ; i< MAX_ERABS_PER_UE; i++)
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{
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@ -543,6 +542,28 @@ s1ap_nas_transport::handle_nas_guti_attach_request( uint32_t enb_ue_s1ap_id,
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msg_valid = integrity_check(ue_emm_ctx,nas_msg);
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if(msg_valid == true)
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{
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//Create new MME UE S1AP Identity
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ue_emm_ctx->mme_ue_s1ap_id = m_s1ap->get_next_mme_ue_s1ap_id();
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//Create UE ECM context
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ue_ecm_ctx_t ue_ecm_ctx;
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//Set UE ECM context
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ue_ecm_ctx.imsi = ue_emm_ctx->imsi;
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ue_ecm_ctx.mme_ue_s1ap_id = ue_emm_ctx->mme_ue_s1ap_id;
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//Set eNB information
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ue_ecm_ctx.enb_ue_s1ap_id = enb_ue_s1ap_id;
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memcpy(&ue_ecm_ctx.enb_sri, enb_sri, sizeof(struct sctp_sndrcvinfo));
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//Save whether secure ESM information transfer is necessary
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ue_ecm_ctx.eit = pdn_con_req.esm_info_transfer_flag_present;
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//Initialize E-RABs
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for(uint i = 0 ; i< MAX_ERABS_PER_UE; i++)
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{
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ue_ecm_ctx.erabs_ctx[i].state = ERAB_DEACTIVATED;
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ue_ecm_ctx.erabs_ctx[i].erab_id = i;
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}
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m_s1ap->add_new_ue_ecm_ctx(ue_ecm_ctx);
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//Create session request
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m_s1ap_log->console("GUTI Attach -- NAS Integrity OK.");
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m_mme_gtpc->send_create_session_request(ue_emm_ctx->imsi, ue_emm_ctx->mme_ue_s1ap_id);
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@ -608,9 +629,10 @@ s1ap_nas_transport::handle_nas_service_request(uint32_t m_tmsi,
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if(ecm_ctx !=NULL)
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{
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//Service request to Connected UE.
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//Delete ECM context and connect.
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m_mme_gtpc->send_delete_session_request(ecm_ctx);
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//m_s1ap send_context_release_request(ecm_ctx, reply_buffer);
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//Delete eNB context and connect.
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m_s1ap->m_s1ap_ctx_mngmt_proc->send_ue_context_release_command(ecm_ctx,reply_buffer);
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m_s1ap->m_s1ap_ctx_mngmt_proc->send_initial_context_setup_request(ecm_ctx);
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}
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else
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{
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