TFTP Timeout Interval and Transfer Size Options (RFC2349)
Original Publication Date: 1998-May-01
Included in the Prior Art Database: 2000-Sep-13
Publishing Venue
Internet Society Requests For Comment (RFCs)
Related People
G. Malkin: AUTHOR [+2]
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.
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].
filename
The name of the file to be read or written, as defined in [1].
This is a NULL-terminated field.
mode
The mode of the file transfer: "netascii", "octet", or "mail",
as defined in [1]. This is a NULL-terminated field.
timeout
The Timeout Interval option, "timeout" (case in-sensitive).
This is a NULL-terminated field.
#secs
The number of seconds to wait before retransmitting, specified
in ASCII. Valid values range between "1" and "255" seconds,
inclusive. This is a NULL-terminated field.
For example:
+-------+--------+---+--------+---+--------+---+-------+---+
| 1 | foobar | 0 | octet | 0 | timeout| 0 | 1 | 0 |
+-------+--------+---+--------+---+--------+---+-------+---+
is a Read ...