/*******************************************************************************
OpenAirInterface
Copyright(c) 1999 - 2014 Eurecom
OpenAirInterface is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenAirInterface is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OpenAirInterface.The full GNU General Public License is
included in this distribution in the file called "COPYING". If not,
see .
Contact Information
OpenAirInterface Admin: openair_admin@eurecom.fr
OpenAirInterface Tech : openair_tech@eurecom.fr
OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
Address : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
*******************************************************************************/
/*****************************************************************************
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 "msc.h"
#include // malloc, free
#include // 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 *******************/
/****************************************************************************/
/* String representation of the requested identity type */
static const char *_emm_identity_type_str[] = {
"NOT AVAILABLE", "IMSI", "IMEI", "IMEISV", "TMSI"
};
/*
* --------------------------------------------------------------------------
* 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(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_type_str[type], type);
/* Setup EMM procedure handler to be executed upon receiving
* lower layer notification */
rc = emm_proc_lowerlayer_initialize(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 (_emm_data.imsi) {
memcpy (&modified_imsi, _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 (_emm_data.imei) {
emm_sap.u.emm_as.u.security.identType = EMM_IDENT_TYPE_IMEI;
emm_sap.u.emm_as.u.security.imei = _emm_data.imei;
}
break;
case EMM_IDENT_TYPE_TMSI:
/* Temporary Mobile Subscriber Identity is requested */
if (_emm_data.guti) {
emm_sap.u.emm_as.u.security.identType = EMM_IDENT_TYPE_TMSI;
emm_sap.u.emm_as.u.security.tmsi = _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 = _emm_data.guti;
emm_sap.u.emm_as.u.security.ueid = 0;
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,
_emm_data.security, FALSE, TRUE);
rc = emm_sap_send(&emm_sap);
LOG_FUNC_RETURN (rc);
}
/****************************************************************************/
/********************* L O C A L F U N C T I O N S *********************/
/****************************************************************************/