/* * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The OpenAirInterface Software Alliance licenses this file to You under * the OAI Public License, Version 1.1 (the "License"); you may not use this file * except in compliance with the License. * You may obtain a copy of the License at * * http://www.openairinterface.org/?page_id=698 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *------------------------------------------------------------------------------- * For more information about the OpenAirInterface (OAI) Software Alliance: * contact@openairinterface.org */ /***************************************************************************** Source Identification.c Version 0.1 Date 2013/04/09 Product NAS stack Subsystem EPS Mobility Management Author Frederic Maurel Description Defines the identification EMM procedure executed by the Non-Access Stratum. The identification procedure is used by the network to request a particular UE to provide specific identification parameters (IMSI, IMEI). *****************************************************************************/ #include "emm_proc.h" #include "nas_log.h" #include "nas_timer.h" #include "emmData.h" #include "emm_sap.h" #include "user_defs.h" #include <stdlib.h> // malloc, free #include <string.h> // memcpy /****************************************************************************/ /**************** E X T E R N A L D E F I N I T I O N S ****************/ /****************************************************************************/ /****************************************************************************/ /******************* L O C A L D E F I N I T I O N S *******************/ /****************************************************************************/ char *emm_identity_type2str(int id_type) { /* String representation of the requested identity type */ static char *_emm_identity_type_str[] = { "NOT AVAILABLE", "IMSI", "IMEI", "IMEISV", "TMSI" }; return _emm_identity_type_str[id_type]; } /* * -------------------------------------------------------------------------- * Internal data handled by the identification procedure in the UE * -------------------------------------------------------------------------- */ /****************************************************************************/ /****************** E X P O R T E D F U N C T I O N S ******************/ /****************************************************************************/ /* * -------------------------------------------------------------------------- * Identification procedure executed by the UE * -------------------------------------------------------------------------- */ /**************************************************************************** ** ** ** Name: emm_proc_identification_request() ** ** ** ** Description: Performs the MME requested identification procedure. ** ** ** ** 3GPP TS 24.301, section 5.4.4.3 ** ** Upon receiving the IDENTITY REQUEST message, the UE shall ** ** send an IDENTITY RESPONSE message to the network. The ** ** IDENTITY RESPONSE message shall contain the identifica- ** ** tion parameters as requested by the network. ** ** ** ** Inputs: type: Type of the requested identity ** ** Others: None ** ** ** ** Outputs: None ** ** Return: RETURNok, RETURNerror ** ** Others: None ** ** ** ***************************************************************************/ int emm_proc_identification_request(nas_user_t *user, emm_proc_identity_type_t type) { LOG_FUNC_IN; int rc; emm_sap_t emm_sap; LOG_TRACE(INFO, "EMM-PROC - Identification requested type = %s (%d)", emm_identity_type2str(type), type); /* Setup EMM procedure handler to be executed upon receiving * lower layer notification */ rc = emm_proc_lowerlayer_initialize(user->lowerlayer_data, NULL, NULL, NULL, NULL); if (rc != RETURNok) { LOG_TRACE(WARNING, "EMM-PROC - Failed to initialize EMM procedure handler"); LOG_FUNC_RETURN (RETURNerror); } emm_sap.u.emm_as.u.security.identType = EMM_IDENT_TYPE_NOT_AVAILABLE; switch (type) { case EMM_IDENT_TYPE_IMSI: { imsi_t modified_imsi; /* International Mobile Subscriber Identity is requested */ if (user->emm_data->imsi) { memcpy (&modified_imsi, user->emm_data->imsi, sizeof (modified_imsi)); /* LW: Eventually replace the 0xF value set in MNC digit 3 by a 0 to avoid IMSI to be truncated before reaching HSS */ if (modified_imsi.u.num.digit6 == 0xF) { modified_imsi.u.num.digit6 = 0; } emm_sap.u.emm_as.u.security.identType = EMM_IDENT_TYPE_IMSI; emm_sap.u.emm_as.u.security.imsi = &modified_imsi; LOG_TRACE(INFO, "EMM-PROC - IMSI = %u%u%u %u%u%u %u%u%u%u%x%x%x%x%x", emm_sap.u.emm_as.u.security.imsi->u.num.digit1, emm_sap.u.emm_as.u.security.imsi->u.num.digit2, emm_sap.u.emm_as.u.security.imsi->u.num.digit3, emm_sap.u.emm_as.u.security.imsi->u.num.digit4, emm_sap.u.emm_as.u.security.imsi->u.num.digit5, emm_sap.u.emm_as.u.security.imsi->u.num.digit6, emm_sap.u.emm_as.u.security.imsi->u.num.digit7, emm_sap.u.emm_as.u.security.imsi->u.num.digit8, emm_sap.u.emm_as.u.security.imsi->u.num.digit9, emm_sap.u.emm_as.u.security.imsi->u.num.digit10, emm_sap.u.emm_as.u.security.imsi->u.num.digit11, emm_sap.u.emm_as.u.security.imsi->u.num.digit12, emm_sap.u.emm_as.u.security.imsi->u.num.digit13, emm_sap.u.emm_as.u.security.imsi->u.num.digit14, emm_sap.u.emm_as.u.security.imsi->u.num.digit15); } break; } case EMM_IDENT_TYPE_IMEI: /* International Mobile Equipment Identity is requested */ if (user->emm_data->imei) { emm_sap.u.emm_as.u.security.identType = EMM_IDENT_TYPE_IMEI; emm_sap.u.emm_as.u.security.imei = user->emm_data->imei; } break; case EMM_IDENT_TYPE_TMSI: /* Temporary Mobile Subscriber Identity is requested */ if (user->emm_data->guti) { emm_sap.u.emm_as.u.security.identType = EMM_IDENT_TYPE_TMSI; emm_sap.u.emm_as.u.security.tmsi = user->emm_data->guti->m_tmsi; } break; default: /* Other identities are not available */ break; } /* * Notify EMM-AS SAP that Identity Response message has to be sent * to the MME */ emm_sap.primitive = EMMAS_SECURITY_RES; emm_sap.u.emm_as.u.security.guti = user->emm_data->guti; emm_sap.u.emm_as.u.security.ueid = user->ueid; emm_sap.u.emm_as.u.security.msgType = EMM_AS_MSG_TYPE_IDENT; /* Setup EPS NAS security data */ emm_as_set_security_data(&emm_sap.u.emm_as.u.security.sctx, user->emm_data->security, FALSE, TRUE); rc = emm_sap_send(user, &emm_sap); LOG_FUNC_RETURN (rc); } /****************************************************************************/ /********************* L O C A L F U N C T I O N S *********************/ /****************************************************************************/