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Library tftp

Library implementing a minimal TFTP server

Currently only write-operations are supported so that script can trigger TFTP transfers and receive the files and return them as result.

The library contains the following classes

  • Packet
** The Packet classes contain one class for each TFTP operation.
  • File
** The File class holds a received file including the name and contents
  • ConnHandler
** The ConnHandler class handles and processes incoming connections.

The following code snippet starts the TFTP server and waits for the file incoming.txt to be uploaded for 10 seconds:

  tftp.start()
  local status, f = tftp.waitFile("incoming.txt", 10)
  if ( status ) then return f:getContent() end

Author:
Patrik Karlsson <patrik@cqure.net>

Copyright© Same as Nmap--See http://nmap.org/book/man-legal.html

Source: http://nmap.org/svn/nselib/tftp.lua

Functions

new (self, filename, content, sender)

Creates a new file object

start ()

Starts the TFTP server and creates a new thread handing over to the dispatcher

waitFile (filename, timeout)

Waits for a file with a specific filename for at least the number of seconds specified by the timeout parameter.



Functions

new (self, filename, content, sender)

Creates a new file object

Parameters

  • self:
  • filename: string containing the filename
  • content: string containing the file content
  • sender:

Return value:

o new class instance
start ()

Starts the TFTP server and creates a new thread handing over to the dispatcher

waitFile (filename, timeout)

Waits for a file with a specific filename for at least the number of seconds specified by the timeout parameter.

If this function is called from the thread that's running the server it will wait until all the other threads have finished executing before returning.

Parameters

  • filename: string containing the name of the file to receive
  • timeout: number containing the minimum number of seconds to wait for the file to be received

Return values:

  1. status true on success false on failure
  2. File instance on success, nil on failure

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