1/*-
 2 * SPDX-License-Identifier: BSD-3-Clause
 3 *
 4 * Copyright (c) 1983, 1993
 5 *	The Regents of the University of California.  All rights reserved.
 6 *
 7 * Redistribution and use in source and binary forms, with or without
 8 * modification, are permitted provided that the following conditions
 9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 *	@(#)tftp.h	8.1 (Berkeley) 6/2/93
32 */
33
34#ifndef _ARPA_TFTP_H_
35#define	_ARPA_TFTP_H_
36
37#include <sys/cdefs.h>
38
39/*
40 * Trivial File Transfer Protocol (IEN-133)
41 */
42#define	SEGSIZE		512		/* data segment size */
43
44/*
45 * Packet types.
46 */
47#define	RRQ	01			/* read request */
48#define	WRQ	02			/* write request */
49#define	DATA	03			/* data packet */
50#define	ACK	04			/* acknowledgement */
51#define	ERROR	05			/* error code */
52#define	OACK	06			/* option acknowledgement */
53
54struct tftphdr {
55	unsigned short	th_opcode;		/* packet type */
56	union {
57		unsigned short	tu_block;	/* block # */
58		unsigned short	tu_code;	/* error code */
59		char	tu_stuff[1];	/* request packet stuff */
60	} __packed th_u;
61	char	th_data[1];		/* data or error string */
62} __packed;
63
64#define	th_block	th_u.tu_block
65#define	th_code		th_u.tu_code
66#define	th_stuff	th_u.tu_stuff
67#define	th_msg		th_data
68
69/*
70 * Error codes.
71 */
72#define	EUNDEF		0		/* not defined */
73#define	ENOTFOUND	1		/* file not found */
74#define	EACCESS		2		/* access violation */
75#define	ENOSPACE	3		/* disk full or allocation exceeded */
76#define	EBADOP		4		/* illegal TFTP operation */
77#define	EBADID		5		/* unknown transfer ID */
78#define	EEXISTS		6		/* file already exists */
79#define	ENOUSER		7		/* no such user */
80#define	EOPTNEG		8		/* option negotiation failed */
81
82#endif /* !_TFTP_H_ */