#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

#include "ProtocolDiscriminator.h"
#include "SecurityHeaderType.h"
#include "MessageType.h"
#include "NasKeySetIdentifier.h"
#include "AuthenticationParameterRand.h"
#include "AuthenticationParameterAutn.h"

#ifndef AUTHENTICATION_REQUEST_H_
#define AUTHENTICATION_REQUEST_H_

/* Minimum length macro. Formed by minimum length of each mandatory field */
#define AUTHENTICATION_REQUEST_MINIMUM_LENGTH ( \
    NAS_KEY_SET_IDENTIFIER_MINIMUM_LENGTH + \
    AUTHENTICATION_PARAMETER_RAND_MINIMUM_LENGTH + \
    AUTHENTICATION_PARAMETER_AUTN_MINIMUM_LENGTH )

/* Maximum length macro. Formed by maximum length of each field */
#define AUTHENTICATION_REQUEST_MAXIMUM_LENGTH ( \
    NAS_KEY_SET_IDENTIFIER_MAXIMUM_LENGTH + \
    AUTHENTICATION_PARAMETER_RAND_MAXIMUM_LENGTH + \
    AUTHENTICATION_PARAMETER_AUTN_MAXIMUM_LENGTH )


/*
 * Message name: Authentication request
 * Description: This message is sent by the network to the UE to initiate authentication of the UE identity. See table 8.2.7.1.
 * Significance: dual
 * Direction: network to UE
 */

typedef struct authentication_request_msg_tag {
    /* Mandatory fields */
    ProtocolDiscriminator            protocoldiscriminator:4;
    SecurityHeaderType               securityheadertype:4;
    MessageType                      messagetype;
    NasKeySetIdentifier              naskeysetidentifierasme;
    AuthenticationParameterRand      authenticationparameterrand;
    AuthenticationParameterAutn      authenticationparameterautn;
} authentication_request_msg;

int decode_authentication_request(authentication_request_msg *authenticationrequest, uint8_t *buffer, uint32_t len);

int encode_authentication_request(authentication_request_msg *authenticationrequest, uint8_t *buffer, uint32_t len);

#endif /* ! defined(AUTHENTICATION_REQUEST_H_) */

