gauthier
2d6270a71a
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7660 818b1a75-f10b-46b9-bf7c-635c3b92a50f
136 lines
4.7 KiB
C
136 lines
4.7 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenAirInterface is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@eurecom.fr
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Address : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
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*******************************************************************************/
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/*****************************************************************************
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Source nas_message.h
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Version 0.1
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Date 2012/26/09
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Product NAS stack
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Subsystem Application Programming Interface
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Author Frederic Maurel
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Description Defines the layer 3 messages supported by the NAS sublayer
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protocol and functions used to encode and decode
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*****************************************************************************/
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#ifndef __NAS_MESSAGE_H__
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#define __NAS_MESSAGE_H__
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#include "commonDef.h"
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#include "emm_msg.h"
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#if defined(NAS_BUILT_IN_EPC)
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#include "emmData.h"
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#endif
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#include "esm_msg.h"
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/****************************************************************************/
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/********************* G L O B A L C O N S T A N T S *******************/
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/****************************************************************************/
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#define NAS_MESSAGE_SECURITY_HEADER_SIZE 6
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/****************************************************************************/
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/************************ G L O B A L T Y P E S ************************/
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/****************************************************************************/
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/* Structure of security protected header */
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typedef struct {
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#ifdef __LITTLE_ENDIAN_BITFIELD
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eps_protocol_discriminator_t protocol_discriminator:4;
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uint8_t security_header_type:4;
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#endif
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#ifdef __BIG_ENDIAN_BITFIELD
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uint8_t security_header_type:4;
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uint8_t protocol_discriminator:4;
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#endif
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uint32_t message_authentication_code;
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uint8_t sequence_number;
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} nas_message_security_header_t;
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/* Structure of plain NAS message */
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typedef union {
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EMM_msg emm; /* EPS Mobility Management messages */
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ESM_msg esm; /* EPS Session Management messages */
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} nas_message_plain_t;
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/* Structure of security protected NAS message */
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typedef struct {
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nas_message_security_header_t header;
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nas_message_plain_t plain;
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} nas_message_security_protected_t;
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/*
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* Structure of a layer 3 NAS message
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*/
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typedef union {
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nas_message_security_header_t header;
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nas_message_security_protected_t security_protected;
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nas_message_plain_t plain;
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} nas_message_t;
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/****************************************************************************/
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/******************** G L O B A L V A R I A B L E S ********************/
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/****************************************************************************/
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/****************************************************************************/
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/****************** E X P O R T E D F U N C T I O N S ******************/
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/****************************************************************************/
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int nas_message_encrypt(
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const char *inbuf,
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char *outbuf,
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const nas_message_security_header_t *header,
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int length,
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void *security);
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int nas_message_decrypt(const char *inbuf,
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char *outbuf,
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nas_message_security_header_t *header,
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int length,
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void *security);
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int nas_message_decode(
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const char * const buffer,
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nas_message_t *msg,
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int length,
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void *security);
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int nas_message_encode(
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char *buffer,
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const nas_message_t * const msg,
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int length,
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void *security);
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#endif /* __NAS_MESSAGE_H__*/
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