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* Redistribution and use in source and binary forms, with or without

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* modification, are permitted provided that the following conditions

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* are met:

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* 1. Redistributions of source code must retain the above copyright

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* notice, this list of conditions and the following disclaimer.

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* 2. Redistributions in binary form must reproduce the above copyright

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* notice, this list of conditions and the following disclaimer in the

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* documentation and/or other materials provided with the distribution.

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* 4. Neither the name of the University nor the names of its contributors

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* may be used to endorse or promote products derived from this software

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* without specific prior written permission.

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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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* SUCH DAMAGE.

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* @(#)tftp.h 8.1 (Berkeley) 6/2/93

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#ifndef _ARPA_TFTP_H

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#define _ARPA_TFTP_H 1

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* Trivial File Transfer Protocol (IEN-133)

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#define SEGSIZE 512 /* data segment size */

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* Packet types.

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#define RRQ 01 /* read request */

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#define WRQ 02 /* write request */

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#define DATA 03 /* data packet */

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#define ACK 04 /* acknowledgement */

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#define ERROR 05 /* error code */

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struct tftphdr {

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short th_opcode; /* packet type */

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union {

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char tu_padding[3]; /* sizeof() compat */

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struct {

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union {

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unsigned short tu_block; /* block # */

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short tu_code; /* error code */

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} __attribute__ ((__packed__)) th_u3;

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char tu_data[0]; /* data or error string */

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} __attribute__ ((__packed__)) th_u2;

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char tu_stuff[0]; /* request packet stuff */

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} __attribute__ ((__packed__)) th_u1;

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} __attribute__ ((__packed__));

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#define th_block th_u1.th_u2.th_u3.tu_block

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#define th_code th_u1.th_u2.th_u3.tu_code

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#define th_stuff th_u1.tu_stuff

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#define th_data th_u1.th_u2.tu_data

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#define th_msg th_u1.th_u2.tu_data

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* Error codes.

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#define EUNDEF 0 /* not defined */

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#define ENOTFOUND 1 /* file not found */

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#define EACCESS 2 /* access violation */

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#define ENOSPACE 3 /* disk full or allocation exceeded */

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#define EBADOP 4 /* illegal TFTP operation */

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#define EBADID 5 /* unknown transfer ID */

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#define EEXISTS 6 /* file already exists */

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#define ENOUSER 7 /* no such user */

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#endif /* arpa/tftp.h */

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