RFC 2349 (rfc2349) - Page 1 of 5

TFTP Timeout Interval and Transfer Size Options

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Network Working Group                                          G. Malkin
Request for Commments: 2349                                 Bay Networks
Updates: 1350                                                  A. Harkin
Obsoletes: 1784                                      Hewlett Packard Co.
Category: Standards Track                                       May 1998


            TFTP Timeout Interval and Transfer Size Options

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (1998).  All Rights Reserved.

Abstract

   The Trivial File Transfer Protocol [1] is a simple, lock-step, file
   transfer protocol which allows a client to get or put a file onto a
   remote host.

   This document describes two TFTP options. The first allows the client
   and server to negotiate the Timeout Interval.  The second allows the
   side receiving the file to determine the ultimate size of the
   transfer before it begins.  The TFTP Option Extension mechanism is
   described in [2].

Timeout Interval Option Specification

   The TFTP Read Request or Write Request packet is modified to include
   the timeout option as follows:

      +-------+---~~---+---+---~~---+---+---~~---+---+---~~---+---+
      |  opc  |filename| 0 |  mode  | 0 | timeout| 0 |  #secs | 0 |
      +-------+---~~---+---+---~~---+---+---~~---+---+---~~---+---+

      opc
         The opcode field contains either a 1, for Read Requests, or 2,
         for Write Requests, as defined in [1].






Malkin & Harkin             Standards Track
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