| 1 |
## |
| 2 |
## Generic data connection package |
| 3 |
## |
| 4 |
|
| 5 |
package Net::FTP::dataconn; |
| 6 |
|
| 7 |
use Carp; |
| 8 |
use vars qw(@ISA $timeout $VERSION); |
| 9 |
use Net::Cmd; |
| 10 |
use Errno; |
| 11 |
|
| 12 |
$VERSION = '0.11'; |
| 13 |
@ISA = qw(IO::Socket::INET); |
| 14 |
|
| 15 |
sub reading |
| 16 |
{ |
| 17 |
my $data = shift; |
| 18 |
${*$data}{'net_ftp_bytesread'} = 0; |
| 19 |
} |
| 20 |
|
| 21 |
sub abort |
| 22 |
{ |
| 23 |
my $data = shift; |
| 24 |
my $ftp = ${*$data}{'net_ftp_cmd'}; |
| 25 |
|
| 26 |
# no need to abort if we have finished the xfer |
| 27 |
return $data->close |
| 28 |
if ${*$data}{'net_ftp_eof'}; |
| 29 |
|
| 30 |
# for some reason if we continously open RETR connections and not |
| 31 |
# read a single byte, then abort them after a while the server will |
| 32 |
# close our connection, this prevents the unexpected EOF on the |
| 33 |
# command channel -- GMB |
| 34 |
if(exists ${*$data}{'net_ftp_bytesread'} |
| 35 |
&& (${*$data}{'net_ftp_bytesread'} == 0)) { |
| 36 |
my $buf=""; |
| 37 |
my $timeout = $data->timeout; |
| 38 |
$data->can_read($timeout) && sysread($data,$buf,1); |
| 39 |
} |
| 40 |
|
| 41 |
${*$data}{'net_ftp_eof'} = 1; # fake |
| 42 |
|
| 43 |
$ftp->abort; # this will close me |
| 44 |
} |
| 45 |
|
| 46 |
sub _close |
| 47 |
{ |
| 48 |
my $data = shift; |
| 49 |
my $ftp = ${*$data}{'net_ftp_cmd'}; |
| 50 |
|
| 51 |
$data->SUPER::close(); |
| 52 |
|
| 53 |
delete ${*$ftp}{'net_ftp_dataconn'} |
| 54 |
if exists ${*$ftp}{'net_ftp_dataconn'} && |
| 55 |
$data == ${*$ftp}{'net_ftp_dataconn'}; |
| 56 |
} |
| 57 |
|
| 58 |
sub close |
| 59 |
{ |
| 60 |
my $data = shift; |
| 61 |
my $ftp = ${*$data}{'net_ftp_cmd'}; |
| 62 |
|
| 63 |
if(exists ${*$data}{'net_ftp_bytesread'} && !${*$data}{'net_ftp_eof'}) { |
| 64 |
my $junk; |
| 65 |
$data->read($junk,1,0); |
| 66 |
return $data->abort unless ${*$data}{'net_ftp_eof'}; |
| 67 |
} |
| 68 |
|
| 69 |
$data->_close; |
| 70 |
|
| 71 |
$ftp->response() == CMD_OK && |
| 72 |
$ftp->message =~ /unique file name:\s*(\S*)\s*\)/ && |
| 73 |
(${*$ftp}{'net_ftp_unique'} = $1); |
| 74 |
|
| 75 |
$ftp->status == CMD_OK; |
| 76 |
} |
| 77 |
|
| 78 |
sub _select { |
| 79 |
my ($data, $timeout, $do_read) = @_; |
| 80 |
my ($rin,$rout,$win,$wout,$tout,$nfound); |
| 81 |
|
| 82 |
vec($rin='',fileno($data),1) = 1; |
| 83 |
|
| 84 |
($win, $rin) = ($rin, $win) unless $do_read; |
| 85 |
|
| 86 |
while (1) { |
| 87 |
$nfound = select($rout=$rin, $wout=$win, undef, $tout=$timeout); |
| 88 |
|
| 89 |
last if $nfound >= 0; |
| 90 |
|
| 91 |
croak "select: $!" |
| 92 |
unless $!{EINTR}; |
| 93 |
} |
| 94 |
|
| 95 |
$nfound; |
| 96 |
} |
| 97 |
|
| 98 |
sub can_read |
| 99 |
{ |
| 100 |
_select(@_[0,1],1); |
| 101 |
} |
| 102 |
|
| 103 |
sub can_write |
| 104 |
{ |
| 105 |
_select(@_[0,1],0); |
| 106 |
} |
| 107 |
|
| 108 |
sub cmd |
| 109 |
{ |
| 110 |
my $ftp = shift; |
| 111 |
|
| 112 |
${*$ftp}{'net_ftp_cmd'}; |
| 113 |
} |
| 114 |
|
| 115 |
sub bytes_read { |
| 116 |
my $ftp = shift; |
| 117 |
|
| 118 |
${*$ftp}{'net_ftp_bytesread'} || 0; |
| 119 |
} |
| 120 |
|
| 121 |
1; |
