2017-03-05 07:49:57 +00:00
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#define TRACE_MODULE _ue_emm_sm
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#include "core_debug.h"
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2017-03-06 08:55:50 +00:00
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#include "s1ap_message.h"
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2017-03-05 09:09:34 +00:00
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#include "nas_message.h"
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2017-03-05 07:49:57 +00:00
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#include "sm.h"
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#include "context.h"
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#include "event.h"
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2017-03-06 08:55:50 +00:00
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#include "nas_conv.h"
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#include "s6a_sm.h"
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#include "s1ap_path.h"
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static void ue_emm_handle_attach_request(ue_ctx_t *ue, nas_message_t *message);
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static void ue_emm_handle_authentication_request(
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ue_ctx_t *ue, pkbuf_t *recvbuf);
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2017-03-06 00:00:37 +00:00
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2017-03-05 07:49:57 +00:00
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void ue_emm_state_initial(ue_emm_sm_t *s, event_t *e)
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{
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d_assert(s, return, "Null param");
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sm_trace(1, e);
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FSM_TRAN(s, &ue_emm_state_operational);
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}
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void ue_emm_state_final(ue_emm_sm_t *s, event_t *e)
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{
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d_assert(s, return, "Null param");
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sm_trace(1, e);
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}
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void ue_emm_state_operational(ue_emm_sm_t *s, event_t *e)
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{
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d_assert(s, return, "Null param");
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d_assert(e, return, "Null param");
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ue_ctx_t *ue = s->ctx;
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d_assert(ue, return, "Null param");
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sm_trace(1, e);
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switch (event_get(e))
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{
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case FSM_ENTRY_SIG:
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{
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break;
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}
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case FSM_EXIT_SIG:
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{
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break;
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}
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2017-03-05 08:36:16 +00:00
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case EVT_MSG_UE_EMM:
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2017-03-05 07:49:57 +00:00
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{
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2017-03-05 09:09:34 +00:00
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nas_message_t message;
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status_t rv;
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2017-03-05 08:36:16 +00:00
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pkbuf_t *recvbuf = (pkbuf_t *)event_get_param2(e);
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d_assert(recvbuf, break, "Null param");
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2017-03-05 09:09:34 +00:00
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rv = nas_decode_pdu(&message, recvbuf);
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if (rv != CORE_OK)
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{
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d_error("Can't parse NAS_PDU");
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break;
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}
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switch(message.h.message_type)
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{
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case NAS_ATTACH_REQUEST:
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{
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2017-03-06 08:55:50 +00:00
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ue_emm_handle_attach_request(ue, &message);
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break;
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}
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case NAS_AUTHENTICATION_REQUEST:
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{
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ue_emm_handle_authentication_request(ue, recvbuf);
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2017-03-05 09:09:34 +00:00
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break;
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}
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default:
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{
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d_warn("Not implemented(type:%d)", message.h.message_type);
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break;
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}
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}
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2017-03-05 08:36:16 +00:00
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pkbuf_free(recvbuf);
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2017-03-05 07:49:57 +00:00
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break;
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}
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default:
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{
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d_error("Unknown event %s", event_get_name(e));
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break;
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}
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}
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}
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void ue_emm_state_exception(ue_emm_sm_t *s, event_t *e)
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{
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d_assert(s, return, "Null param");
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d_assert(e, return, "Null param");
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sm_trace(1, e);
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switch (event_get(e))
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{
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case FSM_ENTRY_SIG:
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{
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break;
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}
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case FSM_EXIT_SIG:
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{
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break;
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}
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default:
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{
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d_error("Unknown event %s", event_get_name(e));
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break;
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}
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}
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}
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2017-03-06 00:00:37 +00:00
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2017-03-06 08:55:50 +00:00
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static void ue_emm_handle_attach_request(ue_ctx_t *ue, nas_message_t *message)
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2017-03-06 00:00:37 +00:00
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{
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nas_attach_request_t *attach_request = &message->emm.attach_request;
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nas_eps_mobile_identity_t *eps_mobile_identity =
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&attach_request->eps_mobile_identity;
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switch(eps_mobile_identity->imsi.type_of_identity)
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{
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case NAS_EPS_MOBILE_IDENTITY_IMSI:
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{
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c_uint8_t plmn_id[PLMN_ID_LEN];
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plmn_id_to_buffer(&mme_self()->plmn_id, plmn_id);
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if (attach_request->presencemask &
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NAS_ATTACH_REQUEST_LAST_VISITED_REGISTERED_TAI_PRESENT)
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{
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nas_tracking_area_identity_t *last_visited_registered_tai =
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&attach_request->last_visited_registered_tai;
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nas_plmn_bcd_to_buffer(
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&last_visited_registered_tai->plmn, plmn_id);
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}
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nas_imsi_bcd_to_buffer(
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&eps_mobile_identity->imsi, eps_mobile_identity->length,
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ue->imsi, &ue->imsi_len);
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s6a_send_auth_info_req(ue, plmn_id);
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break;
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}
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default:
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{
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d_warn("Not implemented(type:%d)",
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eps_mobile_identity->imsi.type_of_identity);
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break;
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}
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}
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}
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2017-03-06 08:55:50 +00:00
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static void ue_emm_handle_authentication_request(ue_ctx_t *ue, pkbuf_t *recvbuf)
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{
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int encoded;
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s1ap_message_t message;
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S1ap_DownlinkNASTransport_IEs_t *ies =
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&message.s1ap_DownlinkNASTransport_IEs;
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S1ap_NAS_PDU_t *nasPdu = &ies->nas_pdu;
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pkbuf_t *sendbuf = NULL;
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memset(&message, 0, sizeof(s1ap_message_t));
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ies->mme_ue_s1ap_id = ue->mme_ue_s1ap_id;
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ies->eNB_UE_S1AP_ID = ue->enb_ue_s1ap_id;
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nasPdu->size = recvbuf->len;
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nasPdu->buf = core_calloc(nasPdu->size, sizeof(c_uint8_t));
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memcpy(nasPdu->buf, recvbuf->payload, nasPdu->size);
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message.procedureCode = S1ap_ProcedureCode_id_downlinkNASTransport;
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message.direction = S1AP_PDU_PR_initiatingMessage;
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encoded = s1ap_encode_pdu(&sendbuf, &message);
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s1ap_free_pdu(&message);
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d_assert(encoded >= 0, , "encode failed");
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d_assert(s1ap_send_to_enb(ue->enb, sendbuf) == CORE_OK, , "send error");
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pkbuf_free(recvbuf);
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}
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