/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 2001 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
/*	  All Rights Reserved	*/

/*
 * Portions of this source code were derived from Berkeley 4.3 BSD
 * under license from the Regents of the University of California.
 */

#ifndef _ARPA_TFTP_H
#define	_ARPA_TFTP_H

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * Trivial File Transfer Protocol (RFC 1350, RFC 2347)
 */
#define	SEGSIZE		512		/* data segment size */

/*
 * Packet types.
 */
#define	RRQ	01			/* read request */
#define	WRQ	02			/* write request */
#define	DATA	03			/* data packet */
#define	ACK	04			/* acknowledgement */
#define	ERROR	05			/* error code */
#define	OACK	06			/* option acknowledgement */

struct	tftphdr {
	short		th_opcode;	/* packet type */
	ushort_t	th_block;	/* block # */
	char		th_data[1];	/* data or error string */
};

#define	th_code		th_block	/* error code overlay on tu_block */
#define	th_stuff	th_block	/* ditto */

#define	th_msg		th_data

/*
 * Error codes.
 */
#define	EUNDEF		0		/* not defined */
#define	ENOTFOUND	1		/* file not found */
#define	EACCESS		2		/* access violation */
#define	ENOSPACE	3		/* disk full or allocation exceeded */
#define	EBADOP		4		/* illegal TFTP operation */
#define	EBADID		5		/* unknown transfer ID */
#define	EEXISTS		6		/* file already exists */
#define	ENOUSER		7		/* no such user */
#define	EOPTNEG		8		/* option negotiation error */

#ifdef	__cplusplus
}
#endif

#endif	/* _ARPA_TFTP_H */