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root |
1.1 |
## |
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## Generic data connection package |
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## |
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package Net::FTP::dataconn; |
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use Carp; |
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use vars qw(@ISA $timeout $VERSION); |
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use Net::Cmd; |
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use Errno; |
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$VERSION = '0.11'; |
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@ISA = qw(IO::Socket::INET); |
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sub reading |
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{ |
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my $data = shift; |
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${*$data}{'net_ftp_bytesread'} = 0; |
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} |
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sub abort |
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{ |
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my $data = shift; |
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my $ftp = ${*$data}{'net_ftp_cmd'}; |
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# no need to abort if we have finished the xfer |
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return $data->close |
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if ${*$data}{'net_ftp_eof'}; |
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# for some reason if we continously open RETR connections and not |
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# read a single byte, then abort them after a while the server will |
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# close our connection, this prevents the unexpected EOF on the |
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# command channel -- GMB |
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if(exists ${*$data}{'net_ftp_bytesread'} |
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&& (${*$data}{'net_ftp_bytesread'} == 0)) { |
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my $buf=""; |
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my $timeout = $data->timeout; |
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$data->can_read($timeout) && sysread($data,$buf,1); |
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} |
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${*$data}{'net_ftp_eof'} = 1; # fake |
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$ftp->abort; # this will close me |
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} |
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sub _close |
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{ |
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my $data = shift; |
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my $ftp = ${*$data}{'net_ftp_cmd'}; |
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$data->SUPER::close(); |
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delete ${*$ftp}{'net_ftp_dataconn'} |
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if exists ${*$ftp}{'net_ftp_dataconn'} && |
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$data == ${*$ftp}{'net_ftp_dataconn'}; |
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} |
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sub close |
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{ |
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my $data = shift; |
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my $ftp = ${*$data}{'net_ftp_cmd'}; |
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if(exists ${*$data}{'net_ftp_bytesread'} && !${*$data}{'net_ftp_eof'}) { |
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my $junk; |
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$data->read($junk,1,0); |
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return $data->abort unless ${*$data}{'net_ftp_eof'}; |
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} |
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$data->_close; |
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$ftp->response() == CMD_OK && |
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$ftp->message =~ /unique file name:\s*(\S*)\s*\)/ && |
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(${*$ftp}{'net_ftp_unique'} = $1); |
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$ftp->status == CMD_OK; |
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} |
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sub _select { |
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my ($data, $timeout, $do_read) = @_; |
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my ($rin,$rout,$win,$wout,$tout,$nfound); |
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vec($rin='',fileno($data),1) = 1; |
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($win, $rin) = ($rin, $win) unless $do_read; |
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while (1) { |
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$nfound = select($rout=$rin, $wout=$win, undef, $tout=$timeout); |
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last if $nfound >= 0; |
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croak "select: $!" |
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unless $!{EINTR}; |
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} |
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$nfound; |
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} |
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sub can_read |
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{ |
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_select(@_[0,1],1); |
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} |
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sub can_write |
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{ |
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_select(@_[0,1],0); |
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} |
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sub cmd |
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{ |
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my $ftp = shift; |
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${*$ftp}{'net_ftp_cmd'}; |
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} |
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sub bytes_read { |
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my $ftp = shift; |
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${*$ftp}{'net_ftp_bytesread'} || 0; |
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} |
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1; |
