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# SMB Perl library, Copyright (C) 2014-2018 Mikhael Goikhman, migo@cpan.org |
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# |
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# This program is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program. If not, see . |
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package SMB::Server; |
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1
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1
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527
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use strict; |
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use warnings; |
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1
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use parent 'SMB::Agent'; |
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use File::Basename qw(basename); |
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1
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use SMB::Tree; |
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974
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use SMB::DCERPC; |
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use SMB::v2::Command::Negotiate; |
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use SMB::v2::Command::Create; |
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use SMB::v2::Command::QueryInfo; |
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1
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use SMB::v2::Command::QueryDirectory; |
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2
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1
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32
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30
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500
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use SMB::v2::Command::Ioctl; |
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1
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2636
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32
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sub new ($%) { |
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0
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1
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my $class = shift; |
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0
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my %options = @_; |
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36
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0
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my $share_roots = delete $options{share_roots}; |
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0
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my $port = delete $options{port}; |
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0
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my $fifo_filename = delete $options{fifo_filename}; |
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40
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0
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0
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0
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die "Neither port nor fifo-filename is specified for $class\n" |
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unless $port || $fifo_filename; |
42
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43
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0
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0
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my $main_socket = $fifo_filename |
44
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? IO::Socket::UNIX->new(Listen => 1, Local => $fifo_filename) |
45
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: IO::Socket::INET->new(Listen => 1, LocalPort => $port, Reuse => 1); |
46
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47
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0
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0
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my $listen_label = $fifo_filename ? "fifo $fifo_filename" : "port $port"; |
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0
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0
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die "Can't open $listen_label: $!\n" unless $main_socket; |
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50
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0
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0
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$options{passwd_filename} //= "$FindBin::Bin/../conf/passwd.txt"; |
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52
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0
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my $self = $class->SUPER::new( |
53
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%options, |
54
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main_socket => $main_socket, |
55
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client_id => 0, # running index |
56
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); |
57
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58
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0
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$self->socket_pool->add($main_socket); |
59
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60
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0
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0
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0
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if (!$share_roots && $FindBin::Bin) { |
61
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0
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my $shares_dir = "$FindBin::Bin/../shares"; |
62
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0
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0
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0
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$share_roots = { map { basename($_) => $_ } grep { -d $_ && -x _ && -r _ } glob("$shares_dir/*") } |
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0
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0
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0
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63
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if -d $shares_dir; |
64
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} |
65
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0
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0
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0
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unless ($share_roots) { |
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0
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0
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66
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0
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$self->err("No share_roots specified and no shares/ autodetected"); |
67
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0
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$share_roots = {}; |
68
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0
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0
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} elsif (ref($share_roots) eq '' && $share_roots eq '-') { |
69
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# special syntax to request a share-less server, don't complain |
70
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0
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$share_roots = {}; |
71
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0
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} elsif (ref($share_roots) ne 'HASH') { |
72
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0
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$self->err("Invalid share_roots ($share_roots) specified"); |
73
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0
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$share_roots = {}; |
74
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} elsif (!%$share_roots) { |
75
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$self->err("No shares to manage, specify non-empty share_roots hash"); |
76
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} |
77
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0
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$self->{share_roots} = $share_roots; |
78
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79
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0
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$self->msg("$class started, listening on $listen_label"); |
80
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81
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0
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return $self; |
82
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} |
83
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84
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sub on_connect ($$) { |
85
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0
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0
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0
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my $self = shift; |
86
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0
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my $connection = shift; |
87
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88
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# intended to be overriden in sub-classes |
89
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90
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0
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my $auth = $connection->auth; |
91
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0
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0
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$auth->load_user_passwords($self->passwd_filename) |
92
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or $auth->user_passwords({ test => '12345' }); |
93
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} |
94
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95
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sub on_disconnect ($$) { |
96
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0
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0
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0
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my $self = shift; |
97
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0
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my $connection = shift; |
98
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99
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# intended to be overriden in sub-classes |
100
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} |
101
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102
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sub recv_command ($$) { |
103
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0
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0
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0
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my $self = shift; |
104
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0
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my $connection = shift; |
105
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106
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0
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return $connection->recv_command; |
107
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} |
108
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109
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sub on_command ($$$) { |
110
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0
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0
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0
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my $self = shift; |
111
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0
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my $connection = shift; |
112
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0
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my $command = shift; |
113
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114
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0
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my $tid = $command->header->tid; |
115
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0
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0
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my $tree = $tid ? (grep { $_->id == $tid } @{$connection->{trees}})[0] : undef; |
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0
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0
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116
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0
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0
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$command->{tree} = $tree if $tree; |
117
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118
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0
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0
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if ($command->is_smb1) { |
119
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0
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0
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if ($command->is('Negotiate')) { |
120
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0
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0
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if ($command->supports_smb_dialect(0x0202)) { |
121
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0
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$command = SMB::v2::Command::Negotiate->new_from_v1($command); |
122
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0
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$tid = 0; |
123
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} else { |
124
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0
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$self->err("Client does not support SMB2, and we do not support SMB1, stopping"); |
125
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} |
126
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} |
127
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} |
128
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129
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0
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0
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if ($command->is_smb2) { |
130
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0
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my $error = 0; |
131
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0
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my $fid = $command->{fid}; |
132
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0
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my $openfile = undef; |
133
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134
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0
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0
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0
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if (($tid || exists $command->{fid}) && !$tree) { |
|
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0
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0
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0
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0
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0
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0
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135
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0
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$error = SMB::STATUS_SMB_BAD_TID; |
136
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} |
137
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elsif ($command->is('Ioctl') && $command->function == SMB::v2::Command::Ioctl::FSCTL_DFS_GET_REFERRALS) { |
138
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0
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$error = SMB::STATUS_NOT_FOUND; |
139
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} |
140
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elsif ($command->is('Ioctl') && $command->function == SMB::v2::Command::Ioctl::FSCTL_PIPE_WAIT) { |
141
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0
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$error = SMB::STATUS_OBJECT_NAME_NOT_FOUND; |
142
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} |
143
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elsif ($fid) { |
144
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0
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0
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if ($command->header->is_chained) { |
145
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0
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0
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0
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$fid = $connection->chain_fid if $connection->chain_fid && $command->is_fid_unset($fid); |
146
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} else { |
147
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0
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$connection->chain_fid(undef); |
148
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} |
149
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0
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0
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$openfile = $connection->{openfiles}{$fid->[0], $fid->[1]} |
150
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or $error = SMB::STATUS_FILE_CLOSED; |
151
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0
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$command->openfile($openfile); |
152
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} |
153
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154
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0
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0
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if ($error) { |
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0
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0
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0
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0
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0
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0
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0
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0
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0
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0
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0
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0
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0
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155
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# skip command processing |
156
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} |
157
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elsif ($command->is('Negotiate')) { |
158
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0
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$command->security_buffer($connection->auth->generate_spnego(is_initial => 1)); |
159
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} |
160
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elsif ($command->is('SessionSetup')) { |
161
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0
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$connection->auth->process_spnego($command->security_buffer); |
162
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0
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$command->security_buffer($connection->auth->generate_spnego); |
163
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0
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$command->header->uid($connection->id); |
164
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0
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my $auth_completed = $connection->auth->auth_completed; |
165
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0
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0
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0
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$error = SMB::STATUS_LOGON_FAILURE |
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0
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166
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if !$command->security_buffer |
167
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|| defined $auth_completed && !$auth_completed; |
168
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} |
169
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elsif ($command->is('TreeConnect')) { |
170
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0
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my ($addr, $share) = $self->parse_share_uri($command->verify_uri); |
171
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0
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my $tree_root = $self->share_roots->{$share}; |
172
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0
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0
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0
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if ($tree_root || $share eq 'IPC$') { |
173
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0
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my $tid = $command->header->tid(@{$connection->{trees}} + 1); |
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0
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174
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0
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|
$tree = SMB::Tree->new($share, $tid, root => $tree_root); |
175
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0
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|
push @{$connection->{trees}}, $tree; |
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0
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|
176
|
0
|
|
|
|
|
|
$command->tree($tree); |
177
|
|
|
|
|
|
|
} else { |
178
|
0
|
|
|
|
|
|
$error = SMB::STATUS_BAD_NETWORK_NAME; |
179
|
|
|
|
|
|
|
} |
180
|
|
|
|
|
|
|
} |
181
|
|
|
|
|
|
|
elsif ($command->is('Create')) { |
182
|
0
|
|
|
|
|
|
my $file = SMB::File->new( |
183
|
|
|
|
|
|
|
name => $command->file_name, |
184
|
|
|
|
|
|
|
share_root => $tree->root, |
185
|
|
|
|
|
|
|
is_ipc => $tree->is_ipc, |
186
|
|
|
|
|
|
|
is_directory => $command->requested_directory, |
187
|
|
|
|
|
|
|
); |
188
|
0
|
|
|
|
|
|
my $disposition = $command->disposition; |
189
|
0
|
0
|
0
|
|
|
|
if ($file->exists && $disposition == SMB::File::DISPOSITION_OPEN) { |
190
|
0
|
0
|
0
|
|
|
|
if ($command->requested_directory && !$file->is_directory) { |
|
|
0
|
0
|
|
|
|
|
191
|
0
|
|
|
|
|
|
$error = SMB::STATUS_NOT_A_DIRECTORY; |
192
|
|
|
|
|
|
|
} elsif ($command->requested_non_directory && $file->is_directory) { |
193
|
0
|
|
|
|
|
|
$error = SMB::STATUS_FILE_IS_A_DIRECTORY; |
194
|
|
|
|
|
|
|
} |
195
|
|
|
|
|
|
|
} |
196
|
0
|
0
|
|
|
|
|
unless ($error) { |
197
|
0
|
|
|
|
|
|
$openfile = $file->open_by_disposition($disposition); |
198
|
0
|
0
|
|
|
|
|
if ($openfile) { |
199
|
0
|
0
|
|
|
|
|
$openfile->{dcerpc} = SMB::DCERPC->new(name => $file->name) |
200
|
|
|
|
|
|
|
if $file->is_svc; |
201
|
0
|
|
|
|
|
|
$fid = [ ++$connection->{last_fid}, 0 ]; |
202
|
0
|
0
|
|
|
|
|
$connection->chain_fid($fid) if $command->has_next_in_chain; |
203
|
0
|
|
|
|
|
|
$connection->{openfiles}{$fid->[0], $fid->[1]} = $openfile; |
204
|
0
|
|
|
|
|
|
$command->fid($fid); |
205
|
0
|
|
|
|
|
|
$command->openfile($openfile); |
206
|
0
|
0
|
|
|
|
|
$openfile->delete_on_close(1) if $command->requested_delete_on_close; |
207
|
|
|
|
|
|
|
} else { |
208
|
0
|
|
|
|
|
|
$error = SMB::STATUS_NO_SUCH_FILE; |
209
|
|
|
|
|
|
|
} |
210
|
|
|
|
|
|
|
} |
211
|
|
|
|
|
|
|
} |
212
|
|
|
|
|
|
|
elsif ($command->is('Close')) { |
213
|
0
|
0
|
|
|
|
|
if ($openfile->delete_on_close) { |
214
|
0
|
|
|
|
|
|
my $filename = $openfile->file->filename; |
215
|
0
|
|
|
|
|
|
$self->msg("Removing $filename"); |
216
|
0
|
0
|
|
|
|
|
$openfile->file->remove() |
217
|
|
|
|
|
|
|
or $self->err("Failed to remove $filename: $!"); |
218
|
|
|
|
|
|
|
} |
219
|
0
|
|
|
|
|
|
$openfile->close; |
220
|
0
|
|
|
|
|
|
delete $connection->{openfiles}{$fid->[0], $fid->[1]}; |
221
|
|
|
|
|
|
|
} |
222
|
|
|
|
|
|
|
elsif ($command->is('QueryInfo')) { |
223
|
0
|
|
|
|
|
|
$command->prepare_info(quiet => $self->quiet); |
224
|
|
|
|
|
|
|
} |
225
|
|
|
|
|
|
|
elsif ($command->is('SetInfo')) { |
226
|
0
|
|
|
|
|
|
my $rename_info = $command->requested_rename_info; |
227
|
0
|
0
|
|
|
|
|
if ($rename_info) { |
228
|
0
|
|
|
|
|
|
my $filename1 = $openfile->file->filename; |
229
|
0
|
|
0
|
|
|
|
my $filename2 = $rename_info->{new_name} // die; |
230
|
0
|
|
0
|
|
|
|
my $replace = $rename_info->{replace} // die; |
231
|
0
|
|
|
|
|
|
$self->msg("Renaming $filename1 to $filename2"); |
232
|
0
|
|
|
|
|
|
($error, my $message) = $openfile->file->rename($filename2); |
233
|
0
|
0
|
|
|
|
|
$self->err("Failed to rename $filename1 to $filename2: $message") |
234
|
|
|
|
|
|
|
if $error; |
235
|
|
|
|
|
|
|
} |
236
|
0
|
0
|
|
|
|
|
$openfile->delete_on_close(1) if $command->requested_delete_on_close; |
237
|
|
|
|
|
|
|
} |
238
|
|
|
|
|
|
|
elsif ($command->is('Read')) { |
239
|
0
|
0
|
|
|
|
|
if ($openfile->{dcerpc}) { |
240
|
0
|
|
|
|
|
|
($command->{buffer}, $error) = $openfile->dcerpc->generate_packet; |
241
|
|
|
|
|
|
|
} |
242
|
|
|
|
|
|
|
else { |
243
|
|
|
|
|
|
|
$command->{buffer} = $openfile->read( |
244
|
|
|
|
|
|
|
length => $command->{length}, |
245
|
|
|
|
|
|
|
offset => $command->{offset}, |
246
|
|
|
|
|
|
|
minlen => $command->{minimum_count}, |
247
|
|
|
|
|
|
|
remain => $command->{remaining_bytes}, |
248
|
0
|
|
|
|
|
|
quiet => $self->quiet, |
249
|
|
|
|
|
|
|
); |
250
|
0
|
0
|
|
|
|
|
$error = SMB::STATUS_END_OF_FILE unless defined $command->{buffer}; |
251
|
|
|
|
|
|
|
} |
252
|
|
|
|
|
|
|
} |
253
|
|
|
|
|
|
|
elsif ($command->is('Write')) { |
254
|
0
|
0
|
|
|
|
|
if ($openfile->{dcerpc}) { |
255
|
0
|
|
|
|
|
|
$error = $openfile->dcerpc->process_packet($command->buffer); |
256
|
|
|
|
|
|
|
} |
257
|
|
|
|
|
|
|
else { |
258
|
0
|
|
|
|
|
|
$error = SMB::STATUS_NOT_IMPLEMENTED; |
259
|
|
|
|
|
|
|
} |
260
|
|
|
|
|
|
|
} |
261
|
|
|
|
|
|
|
elsif ($command->is('Ioctl')) { |
262
|
0
|
0
|
|
|
|
|
if ($openfile->{dcerpc}) { |
263
|
0
|
|
|
|
|
|
$error = $openfile->dcerpc->process_rpc_request($command->buffer); |
264
|
0
|
0
|
|
|
|
|
unless ($error) { |
265
|
0
|
|
|
|
|
|
(my $payload, $error) = $openfile->dcerpc->generate_rpc_response; |
266
|
0
|
0
|
|
|
|
|
$command->buffer($payload) unless $error; |
267
|
|
|
|
|
|
|
} |
268
|
|
|
|
|
|
|
} |
269
|
|
|
|
|
|
|
else { |
270
|
0
|
|
|
|
|
|
$error = SMB::STATUS_NOT_IMPLEMENTED; |
271
|
|
|
|
|
|
|
} |
272
|
|
|
|
|
|
|
} |
273
|
|
|
|
|
|
|
elsif ($command->is('QueryDirectory')) { |
274
|
0
|
0
|
|
|
|
|
my $start_idx = $command->is_reopen ? 0 : $command->is_index_specified |
|
|
0
|
|
|
|
|
|
275
|
|
|
|
|
|
|
? $command->file_index : $openfile->last_index; |
276
|
0
|
|
|
|
|
|
$command->{files} = $openfile->file->find_files( |
277
|
|
|
|
|
|
|
pattern => $command->file_pattern, |
278
|
|
|
|
|
|
|
start_idx => $start_idx, |
279
|
|
|
|
|
|
|
reopen => $command->is_reopen, |
280
|
|
|
|
|
|
|
quiet => $self->quiet, |
281
|
|
|
|
|
|
|
); |
282
|
0
|
0
|
|
|
|
|
$error = SMB::STATUS_INVALID_PARAMETER unless defined $command->{files}; |
283
|
|
|
|
|
|
|
} |
284
|
|
|
|
|
|
|
elsif ($command->is('ChangeNotify')) { |
285
|
0
|
|
|
|
|
|
$command->header->aid(++$connection->{last_aid}); |
286
|
0
|
|
|
|
|
|
$error = SMB::STATUS_PENDING; |
287
|
|
|
|
|
|
|
} |
288
|
|
|
|
|
|
|
elsif ($command->is('Cancel')) { |
289
|
0
|
|
|
|
|
|
$command->header->code($SMB::v2::Commands::command_codes{'ChangeNotify'}); |
290
|
0
|
|
|
|
|
|
$error = SMB::STATUS_CANCELLED; |
291
|
|
|
|
|
|
|
} |
292
|
0
|
|
|
|
|
|
$command->prepare_response; |
293
|
0
|
0
|
|
|
|
|
$command->set_status($error) if $error; |
294
|
0
|
|
|
|
|
|
$connection->send_command($command); |
295
|
0
|
|
|
|
|
|
return; |
296
|
|
|
|
|
|
|
} |
297
|
|
|
|
|
|
|
|
298
|
0
|
|
|
|
|
|
$self->msg("Command $command ignored; missing functionality"); |
299
|
|
|
|
|
|
|
} |
300
|
|
|
|
|
|
|
|
301
|
|
|
|
|
|
|
sub run ($) { |
302
|
0
|
|
|
0
|
0
|
|
my $self = shift; |
303
|
|
|
|
|
|
|
|
304
|
0
|
|
|
|
|
|
my $socket_pool = $self->socket_pool; |
305
|
0
|
|
|
|
|
|
my $connections = $self->connections; |
306
|
|
|
|
|
|
|
|
307
|
0
|
|
|
|
|
|
while (my @ready_sockets = $socket_pool->can_read) { |
308
|
0
|
|
|
|
|
|
foreach my $socket (@ready_sockets) { |
309
|
0
|
0
|
|
|
|
|
if ($socket == $self->main_socket) { |
310
|
0
|
|
0
|
|
|
|
my $client_socket = $socket->accept || next; |
311
|
|
|
|
|
|
|
my $connection = $self->add_connection( |
312
|
|
|
|
|
|
|
$client_socket, ++$self->{client_id}, |
313
|
0
|
|
|
|
|
|
trees => [], |
314
|
|
|
|
|
|
|
last_aid => 0, |
315
|
|
|
|
|
|
|
last_fid => 0, |
316
|
|
|
|
|
|
|
chain_fid => undef, |
317
|
|
|
|
|
|
|
openfiles => {}, |
318
|
|
|
|
|
|
|
); |
319
|
0
|
0
|
|
|
|
|
unless ($connection) { |
320
|
0
|
|
|
|
|
|
$socket->close; |
321
|
0
|
|
|
|
|
|
next; |
322
|
|
|
|
|
|
|
} |
323
|
0
|
|
|
|
|
|
$self->on_connect($connection); |
324
|
|
|
|
|
|
|
} |
325
|
|
|
|
|
|
|
else { |
326
|
0
|
0
|
|
|
|
|
my $connection = $self->get_connection($socket) |
327
|
|
|
|
|
|
|
or die "Unexpected data on unmanaged $socket"; |
328
|
0
|
0
|
|
|
|
|
my @commands = $socket->eof |
329
|
|
|
|
|
|
|
? $connection->msg("Connection reset by peer") |
330
|
|
|
|
|
|
|
: $self->recv_command($connection); |
331
|
0
|
0
|
|
|
|
|
if (!@commands) { |
332
|
0
|
|
|
|
|
|
$self->on_disconnect($connection); |
333
|
0
|
|
|
|
|
|
$self->delete_connection($connection); |
334
|
0
|
|
|
|
|
|
next; |
335
|
|
|
|
|
|
|
} |
336
|
0
|
|
|
|
|
|
for my $command (@commands) { |
337
|
0
|
|
|
|
|
|
$self->on_command($connection, $command); |
338
|
|
|
|
|
|
|
} |
339
|
|
|
|
|
|
|
} |
340
|
|
|
|
|
|
|
} |
341
|
|
|
|
|
|
|
} |
342
|
|
|
|
|
|
|
} |
343
|
|
|
|
|
|
|
|
344
|
|
|
|
|
|
|
1; |