1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
| | ##
## Generic data connection package
##
package Net::FTP::dataconn;
use Carp;
use vars qw(@ISA $timeout);
use Net::Cmd;
@ISA = qw(IO::Socket::INET);
sub reading
{
my $data = shift;
${*$data}{'net_ftp_bytesread'} = 0;
}
sub abort
{
my $data = shift;
my $ftp = ${*$data}{'net_ftp_cmd'};
# no need to abort if we have finished the xfer
return $data->close
if ${*$data}{'net_ftp_eof'};
# for some reason if we continously open RETR connections and not
# read a single byte, then abort them after a while the server will
# close our connection, this prevents the unexpected EOF on the
# command channel -- GMB
if(exists ${*$data}{'net_ftp_bytesread'}
&& (${*$data}{'net_ftp_bytesread'} == 0)) {
my $buf="";
my $timeout = $data->timeout;
$data->can_read($timeout) && sysread($data,$buf,1);
}
${*$data}{'net_ftp_eof'} = 1; # fake
$ftp->abort; # this will close me
}
sub _close
{
my $data = shift;
my $ftp = ${*$data}{'net_ftp_cmd'};
$data->SUPER::close();
delete ${*$ftp}{'net_ftp_dataconn'}
if exists ${*$ftp}{'net_ftp_dataconn'} &&
$data == ${*$ftp}{'net_ftp_dataconn'};
}
sub close
{
my $data = shift;
my $ftp = ${*$data}{'net_ftp_cmd'};
if(exists ${*$data}{'net_ftp_bytesread'} && !${*$data}{'net_ftp_eof'}) {
my $junk;
$data->read($junk,1,0);
return $data->abort unless ${*$data}{'net_ftp_eof'};
}
$data->_close;
$ftp->response() == CMD_OK &&
$ftp->message =~ /unique file name:\s*(\S*)\s*\)/ &&
(${*$ftp}{'net_ftp_unique'} = $1);
$ftp->status == CMD_OK;
}
sub _select
{
my $data = shift;
local *timeout = \$_[0]; shift;
my $rw = shift;
my($rin,$win);
return 1 unless $timeout;
$rin = '';
vec($rin,fileno($data),1) = 1;
$win = $rw ? undef : $rin;
$rin = undef unless $rw;
my $nfound = select($rin, $win, undef, $timeout);
croak "select: $!"
if $nfound < 0;
return $nfound;
}
sub can_read
{
my $data = shift;
local *timeout = \$_[0];
$data->_select($timeout,1);
}
sub can_write
{
my $data = shift;
local *timeout = \$_[0];
$data->_select($timeout,0);
}
sub cmd
{
my $ftp = shift;
${*$ftp}{'net_ftp_cmd'};
}
1;
|