RFC 2349 (rfc2349) - Page 2 of 5

TFTP Timeout Interval and Transfer Size Options

RFC 2349    TFTP Timeout Interval and Transfer Size Options     May 1998


      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 Request, for the file named "foobar", in octet (binary)
   transfer mode, with a timeout interval of 1 second.

   If the server is willing to accept the timeout option, it sends an
   Option Acknowledgment (OACK) to the client.  The specified timeout
   value must match the value specified by the client.

Transfer Size Option Specification

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

      +-------+---~~---+---+---~~---+---+---~~---+---+---~~---+---+
      |  opc  |filename| 0 |  mode  | 0 | tsize  | 0 |  size  | 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.





Malkin & Harkin             Standards Track