mirror of https://github.com/PentHertz/srsLTE.git
Continuing to work on initial context setup request.
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@ -27,6 +27,10 @@
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#include <stdint.h>
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#include "srslte/asn1/gtpc_msg.h"
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//Helpful marcos to convert TEIDs (uint64_t) to/from network byte order
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#define HTONLL(x) ((1==htonl(1)) ? (x) : (((uint64_t)htonl((x) & 0xFFFFFFFFUL)) << 32) | htonl((uint32_t)((x) >> 32)))
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#define NTOHLL(x) ((1==ntohl(1)) ? (x) : (((uint64_t)ntohl((x) & 0xFFFFFFFFUL)) << 32) | ntohl((uint32_t)((x) >> 32)))
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namespace srslte{
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/*GTP-C Version*/
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@ -202,7 +202,7 @@ struct gtpc_create_session_request
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struct gtpc_f_teid_ie s12_rnc_f_teid;
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bool s2b_u_epdg_f_teid_present;
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struct gtpc_f_teid_ie s2b_u_epdg_f_teid;
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} bearer_context_created; // M
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} eps_bearer_context_created; // M
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//bool bearer_context_deleted_present;
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//struct bearer_context_ bearer_context_deleted; // C
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//bool trace_information_present;
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@ -46,7 +46,7 @@ public:
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void init();
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uint64_t get_new_ctrl_teid();
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void send_create_session_request(uint64_t imsi, struct srslte::gtpc_pdu *cs_resp_pdu);
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void send_create_session_request(uint64_t imsi, uint32_t mme_s1ap_id);
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void handle_create_session_response(srslte::gtpc_pdu *cs_resp_pdu);
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private:
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@ -81,7 +81,7 @@ public:
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bool handle_nas_authentication_response(srslte::byte_buffer_t *nas_buffer, srslte::byte_buffer_t *reply_buffer, ue_ctx_t *ue_ctx);
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bool handle_nas_security_mode_complete(srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_msg, ue_ctx_t *ue_ctx);
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bool send_initial_context_setup_request(struct srslte::gtpc_create_session_response *cs_resp);
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bool send_initial_context_setup_request(uint32_t mme_ue_s1ap_id, struct srslte::gtpc_create_session_response *cs_resp);
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void print_enb_ctx_info(const enb_ctx_t &enb_ctx);
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@ -79,11 +79,14 @@ mme_gtpc::get_new_ctrl_teid()
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return m_next_ctrl_teid++; //FIXME Use a Id pool?
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}
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void
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mme_gtpc::send_create_session_request(uint64_t imsi, struct srslte::gtpc_pdu *cs_resp_pdu)
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mme_gtpc::send_create_session_request(uint64_t imsi, uint32_t mme_ue_s1ap_id)
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{
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struct srslte::gtpc_pdu cs_req_pdu;
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struct srslte::gtpc_create_session_request *cs_req = &cs_req_pdu.choice.create_session_request;
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struct srslte::gtpc_pdu cs_resp_pdu;
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//Initialize GTP-C message to zero
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bzero(&cs_req_pdu, sizeof(struct srslte::gtpc_pdu));
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@ -95,7 +98,7 @@ mme_gtpc::send_create_session_request(uint64_t imsi, struct srslte::gtpc_pdu *cs
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//Setup GTP-C Create Session Request IEs
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// Control TEID allocated \\
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cs_req->sender_f_teid.tied = get_new_ctrl_teid();
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cs_req->sender_f_teid.teid = get_new_ctrl_teid();
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cs_req->sender_f_teid.ipv4 = m_mme_gtpc_ip;
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// APN \\
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memcpy(cs_req->apn, "internet", sizeof("internet"));
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@ -103,20 +106,39 @@ mme_gtpc::send_create_session_request(uint64_t imsi, struct srslte::gtpc_pdu *cs
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cs_req->rat_type = GTPC_RAT_TYPE::EUTRAN;
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//Save RX Control TEID
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//create_rx_control_teid(cs_req->sender_f_teid);
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m_teid_to_mme_s1ap_id.insert(std::pair<uint64_t,uint32_t>(cs_req->sender_f_teid.teid, mme_ue_s1ap_id));
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m_spgw->handle_create_session_request(cs_req, &cs_resp_pdu);
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handle_create_session_response(&cs_resp_pdu);
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m_spgw->handle_create_session_request(cs_req, cs_resp_pdu);
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return;
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}
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void
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mme_gtpc::handle_create_session_response(srslte::gtpc_pdu *cs_resp_pdu)
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{
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struct srslte::gtpc_create_session_response *cs_resp = & cs_resp_pdu->choice.create_session_response;
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if (cs_resp_pdu->header.type != srslte::GTPC_MSG_TYPE_CREATE_SESSION_RESPONSE)
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{
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//m_mme_gtpc_log->warning("Could not create GTPC session.\n");
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//TODO Handle err
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return;
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}
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if (cs_resp->cause.cause_value != srslte::GTPC_CAUSE_VALUE_REQUEST_ACCEPTED){
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//m_mme_gtpc_log->warning("Could not create GTPC session.\n");
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//TODO Handle error
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return;
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}
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//Get MME_UE_S1AP_ID from the Ctrl TEID
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std::map<uint64_t,uint32_t>::iterator id_it = m_teid_to_mme_s1ap_id.find(cs_resp_pdu->header.teid);
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if(id_it == m_teid_to_mme_s1ap_id.end())
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{
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//Could not find MME UE S1AP TEID
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return;
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}
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uint32_t mme_s1ap_id = id_it->second;
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m_s1ap->send_intial_context_setup_request(mme_s1ap_id, &cs_resp_pdu->choice.create_session_request);
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m_s1ap->send_initial_context_setup_request(mme_s1ap_id, cs_resp);
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}
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} //namespace srsepc
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@ -50,7 +50,7 @@ s1ap::get_instance(void)
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{
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boost::mutex::scoped_lock lock(s1ap_instance_mutex);
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if(NULL == m_instance) {
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m_instance = new mme();
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m_instance = new s1ap();
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}
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return(m_instance);
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}
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@ -538,37 +538,41 @@ s1ap::handle_nas_security_mode_complete(srslte::byte_buffer_t *nas_msg, srslte::
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//FIXME The packging of GTP-C messages is not ready.
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//This means that GTP-U tunnels are created with function calls, as opposed to GTP-C.
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struct srslte::gtpc_pdu cs_resp_pdu;
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struct srslte::gtpc_create_session_response *cs_resp = & cs_resp_pdu.choice.create_session_response;
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m_mme_gtpc->send_create_session_request(ue_ctx->imsi, ue_ctx->mme_ue_s1ap_id);
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m_mme_gtpc->send_create_session_request(ue_ctx->imsi, &cs_resp_pdu);
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if (cs_resp->cause.cause_value != srslte::GTPC_CAUSE_VALUE_REQUEST_ACCEPTED){
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m_s1ap_log->warning("Could not create GTPC session.\n");
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//TODO Handle error
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}
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else{
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send_initial_context_setup_request(cs_resp);
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}
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return true;
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}
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bool
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s1ap::send_initial_context_setup_request(struct srslte::gtpc_create_session_response *cs_resp)
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s1ap::send_initial_context_setup_request(uint32_t mme_ue_s1ap_id, struct srslte::gtpc_create_session_response *cs_resp)
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{
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//Find UE Context
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ue_ctx_t *ue_ctx;
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std::map<uint32_t, ue_ctx_t*>::iterator ue_ctx_it = m_active_ues.find(mme_ue_s1ap_id);
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if(ue_ctx_it == m_active_ues.end())
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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_ctx = ue_ctx_it->second;
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LIBLTE_S1AP_MESSAGE_INITIALCONTEXTSETUPREQUEST_STRUCT in_ctxt_req;
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uint64_t imsi = m_mme_gtpc->ctrl_teid_to_imsi();
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bzero(&in_ctxt_req, sizeof(in_ctxt_req));
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in_ctxt_req.MME_UE_S1AP_ID = ;
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in_ctxt_req.eNB_UE_S1AP_ID =;
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in_ctxt_req.uEaggregateMaximumBitrate =;
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in_ctxt_req.MME_UE_S1AP_ID.MME_UE_S1AP_ID = ue_ctx->mme_ue_s1ap_id;
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in_ctxt_req.eNB_UE_S1AP_ID.ENB_UE_S1AP_ID = ue_ctx->enb_ue_s1ap_id;
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in_ctxt_req.uEaggregateMaximumBitrate.uEaggregateMaximumBitRateDL.BitRate=4294967295;//2^32-1
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in_ctxt_req.uEaggregateMaximumBitrate.uEaggregateMaximumBitRateUL.BitRate=4294967295;//FIXME Get UE-AMBR from HSS
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//eRAB context to setup
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LIBLTE_S1AP_E_RABSETUPITEMCTXTSURES_STRUCT *erab_ctxt = &in_ctxt_req.E_RABToBeSetupListCtxtSUReq.buffer[0]; //FIXME?
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erab_ctxt->e_RAB_ID = cs_resp->bearer_context_created.ebi;
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erab_ctxt->transportLayerAddress = cs_resp->bearer_context_created.sender_f_teid.ipv4;
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erab_ctxt->gTP_TEID = cs_resp->bearer_context_created.sender_f_teid.teid;
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LIBLTE_S1AP_E_RABTOBESETUPITEMCTXTSUREQ_STRUCT *erab_ctxt = &in_ctxt_req.E_RABToBeSetupListCtxtSUReq.buffer[0]; //FIXME?
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erab_ctxt->e_RAB_ID.E_RAB_ID = cs_resp->eps_bearer_context_created.ebi;
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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 = cs_resp->eps_bearer_context_created.s1_u_sgw_f_teid.ipv4;
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memcpy(erab_ctxt->gTP_TEID.buffer, cs_resp->eps_bearer_context_created.sender_f_teid.teid, sizeof(uint64_t));
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in_ctxt_req->UESecurityCapabilities =;
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in_ctxt_req->SecurityKey = ;
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bool iE_Extensions_present;
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}LIBLTE_S1AP_E_RABSETUPITEMCTXTSURES_STRUCT;
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*/
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/*typedef struct{
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bool ext;
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uint32_t n_bits;
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uint8_t buffer[160];
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}LIBLTE_S1AP_TRANSPORTLAYERADDRESS_STRUCT;
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*/
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/*
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typedef struct{
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uint8_t buffer[4];
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}LIBLTE_S1AP_GTP_TEID_STRUCT;
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*/
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/*typedef struct{
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bool ext;
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LIBLTE_S1AP_MME_UE_S1AP_ID_STRUCT MME_UE_S1AP_ID;
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