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  
      49  struct	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 */