/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _RADIUS_PROTOCOL_H
#define _RADIUS_PROTOCOL_H

#ifdef __cplusplus
extern "C" {
#endif

/* Packet type. RFC 2865 section 4. */
#define RAD_ACCESS_REQ          1       /* Authentication Request */
#define RAD_ACCESS_ACPT         2       /* Authentication Accepted */
#define RAD_ACCESS_REJ          3       /* Authentication Rejected */

/* RADIUS Attribute Types. RFC 2865 section 5. */
#define RAD_USER_NAME           1
#define RAD_CHAP_PASSWORD       3
#define RAD_CHAP_CHALLENGE      60

/* RFC 2865 Section 3. The Identifier field is one octet. */
#define RAD_IDENTIFIER_LEN      1

/* RFC 2865 Section 5.3. The String field is 16 octets. */
#define RAD_CHAP_PASSWD_STR_LEN 16

/* RFC 2865 Section 3. Authenticator field is 16 octets. */
#define RAD_AUTHENTICATOR_LEN   16

/* RFC 2865 Section 5: 1-253 octets */
#define MAX_RAD_ATTR_VALUE_LEN  253

/* RFC 2865 Section 3. Minimum length 20 octets. */
#define MIN_RAD_PACKET_LEN      20

/* RFC 2865 Section 3. Maximum length 4096 octets. */
#define MAX_RAD_PACKET_LEN      4096

/* Maximum RADIUS shared secret length (in fact there is no defined limit) */
#define MAX_RAD_SHARED_SECRET_LEN       128

/* RFC 2865 Section 3. Minimum RADIUS shared secret length */
#define MIN_RAD_SHARED_SECRET_LEN       16

/* Raw RADIUS packet. RFC 2865 section 3. */
typedef struct radius_packet {
        uint8_t code;           /* RADIUS code, section 3, RFC 2865 */
        uint8_t identifier;     /* 1 octet in length. RFC 2865 section 3 */
        uint8_t length[2];      /* 2 octets, or sizeof (u_short) */
        uint8_t authenticator[RAD_AUTHENTICATOR_LEN];
        uint8_t data[1];
} radius_packet_t;

/* Length of a RADIUS packet minus the payload */
#define RAD_PACKET_HDR_LEN              20

#ifdef __cplusplus
}
#endif

#endif /* _RADIUS_PROTOCOL_H */