1/*
 2 * Copyright (c) 1983, 1993
 3 *	The Regents of the University of California.  All rights reserved.
 4 *
 5 * Redistribution and use in source and binary forms, with or without
 6 * modification, are permitted provided that the following conditions
 7 * are met:
 8 * 1. Redistributions of source code must retain the above copyright
 9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)tftp.h	8.1 (Berkeley) 6/2/93
30 */
31
32#ifndef _ARPA_TFTP_H
33#define	_ARPA_TFTP_H 1
34
35/*
36 * Trivial File Transfer Protocol (IEN-133)
37 */
38#define	SEGSIZE		512		/* data segment size */
39
40/*
41 * Packet types.
42 */
43#define	RRQ	01				/* read request */
44#define	WRQ	02				/* write request */
45#define	DATA	03				/* data packet */
46#define	ACK	04				/* acknowledgement */
47#define	ERROR	05				/* error code */
48
49struct	tftphdr {
50	short	th_opcode;			/* packet type */
51	union {
52		char	tu_padding[3];		/* sizeof() compat */
53		struct {
54			union {
55				unsigned short	tu_block;	/* block # */
56				short	tu_code;		/* error code */
57			} __attribute__ ((__packed__)) th_u3;
58			char tu_data[0];	/* data or error string */
59		} __attribute__ ((__packed__)) th_u2;
60		char	tu_stuff[0];		/* request packet stuff */
61	} __attribute__ ((__packed__)) th_u1;
62} __attribute__ ((__packed__));
63
64#define	th_block	th_u1.th_u2.th_u3.tu_block
65#define	th_code		th_u1.th_u2.th_u3.tu_code
66#define	th_stuff	th_u1.tu_stuff
67#define	th_data		th_u1.th_u2.tu_data
68#define	th_msg		th_u1.th_u2.tu_data
69
70/*
71 * Error codes.
72 */
73#define	EUNDEF		0		/* not defined */
74#define	ENOTFOUND	1		/* file not found */
75#define	EACCESS		2		/* access violation */
76#define	ENOSPACE	3		/* disk full or allocation exceeded */
77#define	EBADOP		4		/* illegal TFTP operation */
78#define	EBADID		5		/* unknown transfer ID */
79#define	EEXISTS		6		/* file already exists */
80#define	ENOUSER		7		/* no such user */
81
82#endif /* arpa/tftp.h */