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TFTP.H

/*
 * Copyright (c) 1983, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by the University of
 *    California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *    @(#)tftp.h  8.1 (Berkeley) 6/2/93
 */

#ifndef _ARPA_TFTP_H
#define _ARPA_TFTP_H

/*
 * Trivial File Transfer Protocol (IEN-133)
 */
#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 */

#ifdef ERROR
#undef ERROR
#define     ERROR 05                /* error code */
#endif

struct      tftphdr {
      short th_opcode;        /* packet type */
      union {
            short tu_block;   /* block # */
            short tu_code;    /* error code */
            char  tu_stuff[1];      /* request packet stuff */
      } th_u;
      char  th_data[1];       /* data or error string */
};

#define     th_block    th_u.tu_block
#define     th_code           th_u.tu_code
#define     th_stuff    th_u.tu_stuff
#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 */

#endif /* _ARPA_TFTP_H */

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