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Net-TFTPd-0.10
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/ Net::TFTPd

NAME

Net::TFTPd - Perl extension for Trivial File Transfer Protocol Server

SYNOPSIS

use strict;
use Net::TFTPd;

my $tftpdOBJ = Net::TFTPd->new('RootDir' => 'path/to/files')
  or die "Error creating TFTPd listener: %s", Net::TFTPd->error;

my $tftpRQ = $tftpdOBJ->waitRQ(10)
  or die "Error waiting for TFTP request: %s", Net::TFTPd->error;

$tftpRQ->processRQ()
  or die "Error processing TFTP request: %s", Net::TFTPd->error;

printf "%u bytes has been transferred", $tftpRQ->getTotalBytes() || 0;

DESCRIPTION

Net::TFTPd is a class implementing a simple Trivial File Transfer Protocol server in Perl as described in RFC1350.

Net::TFTPd also supports the TFTP Option Extension (as described in RFC2347), with the following options:

RFC2348 TFTP Blocksize Option
RFC2349 TFTP Timeout Interval and Transfer Size Options

EXPORT

None by default.

%OPCODES

The %OPCODES tag exports the %OPCODES hash:

%OPCODES = (
  1       => 'RRQ',
  2       => 'WRQ',
  3       => 'DATA',
  4       => 'ACK',
  5       => 'ERROR',
  6       => 'OACK',
  'RRQ'   => 1,
  'WRQ'   => 2,
  'DATA'  => 3,
  'ACK'   => 4,
  'ERROR' => 5,
  'OACK'  => 6
);

Listener constructor

new()

$listener = new Net::TFTPd( ['RootDir' => 'path/to/files' | 'FileName' => 'path/to/file'] [, OPTIONS ] );

or

$listener = Net::TFTPd->new( ['RootDir' => 'path/to/files' | 'FileName' => 'path/to/file'] [, OPTIONS ] );

Create a new Net::TFTPd object where 'path/to/files' is the default path to file repository or 'path/to/file' is the single file allowed for download, and OPTIONS are the default server options.

Valid options are:

Option     Description                                        Default
------     -----------                                        -------
LocalAddr  Interface to bind to (for multi-homed server)          any
LocalPort  Port to bind server to                                  69
Timeout    Timeout in seconds to wait for a request                10
ACKtimeout Timeout in seconds to wait for an ACK packet             4
ACKretries Maximum number of retries waiting for ACK                4
Readable   Clients are allowed to read files                        1
Writable   Clients are allowed to write files                       0
BlkSize    Minimum blocksize to negotiate for transfers           512
CallBack   Reference to code executed for each transferred block    -
Debug      Activates debug mode (verbose)                           0
Family     Address family IPv4/IPv6                              IPv4
             Valid values for IPv4:
               4, v4, ip4, ipv4, AF_INET (constant)
             Valid values for IPv6:
               6, v6, ip6, ipv6, AF_INET6 (constant)
V6Only     Enable / disable v6only (see IO::Socket::IP)             1

NOTE: IPv6 requires IO::Socket::IP. Failback is IO::Socket::INET and only IPv4 support.

CallBack

The CallBack code is called by processRQ method for each tranferred block.

The code receives (into @_ array) a reference to internal $request object.

Example:

sub callback
{
  my $req = shift;
  printf "block: %u\/%u\n", $req->{'_REQUEST_'}{'LASTACK'}, $req->{'_REQUEST_'}{'LASTBLK'};
}

my $tftpdOBJ = Net::TFTPd->new('RootDir' => 'c:/temp', 'Timeout' => 60, 'CallBack' => \&callback) or die Net::TFTPd->error;

Listener methods

waitRQ()

$request = $listener->waitRQ([Timeout]);

Waits for a client request (RRQ or WRQ) and returns a $request object or undef if timed out.

If Timeout is missing, the timeout defined for $listener object is used instead.

When the method returns, the program should fork() and process the request invoking processRQ() while the parent process should re-start waiting for another request.

Request methods

processRQ()

$ret = $request->processRQ();

Processes a request and returns 1 if success, undef if error.

getFileName()

$ret = $request->getFileName();

Returns the requested file name.

getMode()

$ret = $request->getMode();

Returns the transfer mode for the request.

getBlkSize()

$ret = $request->getBlkSize();

Returns the block size used for the transfer.

server()

$ret = $request->server();

Return IO::Socket::* object for the created server. All IO::Socket::* accessors can then be called.

getPeerAddr()

$ret = $request->getPeerAddr();

Returns the address of the requesting client.

getPeerPort()

$ret = $request->getPeerMode();

Returns the port of the requesting client.

getTotalBytes()

$ret = $request->getTotalBytes();

Returns the number of bytes transferred for the request.

CREDITS

Thanks to Michael Vincent (<VINSWORLD>) for the NETASCII support, transferred bytes and IPv6 patches.

AUTHOR

Luigino Masarati, <lmasarati@hotmail.com>

SEE ALSO

Net::TFTP.