/**************************************************************************** ** ** ** Name: EmmDeregisteredNoCellAvailable() ** ** ** ** Description: Handles the behaviour of the UE while the EMM-SAP is in ** ** EMM-DEREGISTERED.NO-CELL-AVAILABLE state. ** ** ** ** 3GPP TS 24.301, section 5.2.2.3.7 ** ** The UE shall perform cell selection and choose an appro- ** ** priate substate when a cell is found. ** ** ** ** Inputs: evt: The received EMM-SAP event ** ** Others: emm_fsm_status ** ** ** ** Outputs: None ** ** Return: RETURNok, RETURNerror ** ** Others: emm_fsm_status ** ** ** ***************************************************************************/ int EmmDeregisteredNoCellAvailable(nas_user_t *user, const emm_reg_t *evt) { LOG_FUNC_IN; int rc = RETURNerror; emm_data_t *emm_data = user->emm_data; user_api_id_t *user_api_id = user->user_api_id; assert(emm_fsm_get_status(user) == EMM_DEREGISTERED_NO_CELL_AVAILABLE); switch (evt->primitive) { /* TODO: network re-selection is not allowed when in No Cell * Available substate. The AS should search for a suitable cell * and notify the NAS when such a cell is found (TS 24.008 section * 4.2.4.1.2) */ case _EMMREG_REGISTER_REQ: /* * The user manually re-selected a PLMN to register to */ rc = emm_fsm_set_status(user, EMM_DEREGISTERED_PLMN_SEARCH); if (rc != RETURNerror) { /* * Notify EMM that the MT is currently searching an operator * to register to */ rc = emm_proc_registration_notify(user_api_id, emm_data, NET_REG_STATE_ON); if (rc != RETURNok) { LOG_TRACE(WARNING, "EMM-FSM - " "Failed to notify registration update"); } /* * Perform network re-selection procedure */ rc = emm_proc_plmn_selection(user, evt->u.regist.index); } break; default: LOG_TRACE(ERROR, "EMM-FSM - Primitive is not valid (%d)", evt->primitive); break; } LOG_FUNC_RETURN (rc); }
/**************************************************************************** ** ** ** Name: EmmRegisteredInitiated() ** ** ** ** Description: Handles the behaviour of the UE while the EMM-SAP is in ** ** EMM-REGISTERED-INITIATED state. ** ** ** ** Inputs: evt: The received EMM-SAP event ** ** Others: emm_fsm_status ** ** ** ** Outputs: None ** ** Return: RETURNok, RETURNerror ** ** Others: emm_fsm_status ** ** ** ***************************************************************************/ int EmmRegisteredInitiated(const emm_reg_t *evt) { LOG_FUNC_IN; int rc = RETURNerror; assert(emm_fsm_get_status() == EMM_REGISTERED_INITIATED); switch (evt->primitive) { case _EMMREG_ATTACH_INIT: /* * Attach procedure has to be restarted (timers T3402 or T3411 * expired) */ /* Move to the corresponding initial EMM state */ if (evt->u.attach.is_emergency) { rc = emm_fsm_set_status(EMM_DEREGISTERED_LIMITED_SERVICE); } else { rc = emm_fsm_set_status(EMM_DEREGISTERED_NORMAL_SERVICE); } if (rc != RETURNerror) { /* Restart the attach procedure */ rc = emm_proc_attach_restart(); } break; case _EMMREG_ATTACH_FAILED: /* * Attempt to attach to the network failed (abnormal case or * timer T3410 expired). The network attach procedure shall be * restarted when timer T3411 expires. */ rc = emm_fsm_set_status(EMM_DEREGISTERED_ATTEMPTING_TO_ATTACH); break; case _EMMREG_ATTACH_EXCEEDED: /* * Attempt to attach to the network failed (abnormal case or * timer T3410 expired) and the attach attempt counter reached * its maximum value. The state is changed to EMM-DEREGISTERED. * ATTEMPTING-TO-ATTACH or optionally to EMM-DEREGISTERED.PLMN- * SEARCH in order to perform a PLMN selection. */ /* TODO: ATTEMPTING-TO-ATTACH or PLMN-SEARCH ??? */ rc = emm_fsm_set_status(EMM_DEREGISTERED_ATTEMPTING_TO_ATTACH); break; case _EMMREG_ATTACH_CNF: /* * EPS network attach accepted by the network; * enter state EMM-REGISTERED. */ rc = emm_fsm_set_status(EMM_REGISTERED); if (rc != RETURNerror) { /* * Notify EMM that the MT is registered */ rc = emm_proc_registration_notify(NET_REG_STATE_HN); if (rc != RETURNok) { LOG_TRACE(WARNING, "EMM-FSM - " "Failed to notify registration update"); } } break; case _EMMREG_AUTH_REJ: /* * UE authentication rejected by the network; * abort any EMM signalling procedure */ case _EMMREG_ATTACH_REJ: /* * EPS network attach rejected by the network; * enter state EMM-DEREGISTERED. */ rc = emm_fsm_set_status(EMM_DEREGISTERED); if (rc != RETURNerror) { /* * Notify EMM that the MT's registration is denied */ rc = emm_proc_registration_notify(NET_REG_STATE_DENIED); if (rc != RETURNok) { LOG_TRACE(WARNING, "EMM-FSM - " "Failed to notify registration update"); } } break; case _EMMREG_REGISTER_REQ: /* * The UE has to select a new PLMN to register to */ rc = emm_fsm_set_status(EMM_DEREGISTERED_PLMN_SEARCH); if (rc != RETURNerror) { /* Process the network registration request */ rc = emm_fsm_process(evt); } break; case _EMMREG_REGISTER_REJ: /* * The UE failed to register to the network for normal EPS service */ rc = emm_fsm_set_status(EMM_DEREGISTERED_LIMITED_SERVICE); break; case _EMMREG_NO_IMSI: /* * The UE failed to register to the network for emergency * bearer services */ rc = emm_fsm_set_status(EMM_DEREGISTERED_NO_IMSI); break; case _EMMREG_DETACH_INIT: /* * Initiate detach procedure for EPS services */ rc = emm_proc_detach(EMM_DETACH_TYPE_EPS, evt->u.detach.switch_off); break; case _EMMREG_DETACH_REQ: /* * An EPS network detach has been requested (Detach Request * message successfully delivered to the network); * enter state EMM-DEREGISTERED-INITIATED */ rc = emm_fsm_set_status(EMM_DEREGISTERED_INITIATED); break; case _EMMREG_LOWERLAYER_SUCCESS: /* * Data transfer message has been successfully delivered; * The NAS message may be Attach Complete, Detach Request or * any message transfered by EMM common procedures requested * by the network. */ rc = emm_proc_lowerlayer_success(); break; case _EMMREG_LOWERLAYER_FAILURE: /* * Data transfer message failed to be delivered; * The NAS message may be Attach Complete, Detach Request or * any message transfered by EMM common procedures requested * by the network. */ rc = emm_proc_lowerlayer_failure(FALSE); break; case _EMMREG_LOWERLAYER_RELEASE: /* * NAS signalling connection has been released before the Attach * Accept, Attach Reject, or any message transfered by EMM common * procedures requested by the network, is received. */ rc = emm_proc_lowerlayer_release(); break; default: LOG_TRACE(ERROR, "EMM-FSM - Primitive is not valid (%d)", evt->primitive); break; } LOG_FUNC_RETURN (rc); }