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# -*- coding: utf-8 -*- |
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# Copyright (C) 2011-2013 Rocky Bernstein <rocky@cpan.org> |
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# Debugger Server Input/Output interface. |
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6096
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use warnings; use strict; |
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package Devel::Trepan::IO::TCPServer; |
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use English qw ( -no_match_vars ); |
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11660
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use IO::Socket qw(SOCK_STREAM); |
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154712
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74
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BEGIN { |
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135
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my @OLD_INC = @INC; |
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3052
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use rlib '../../..'; |
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14
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109
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10322
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use Devel::Trepan::IO::TCPPack; |
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823
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711
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use Devel::Trepan::Util qw(hash_merge); |
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37
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14
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690
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386
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@INC = @OLD_INC; |
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} |
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14
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96
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use constant DEFAULT_INIT_OPTS => {open => 1}; |
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14
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1202
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12493
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use constant SERVER_SOCKET_OPTS => { |
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host => '127.0.0.1', # or ::1? or localhost? |
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port => 1954, |
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timeout => 5, # FIXME: not used |
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reuse => 1, # FIXME: not used. Allow port to be resued on close? |
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open => 1, |
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logger => undef # Complaints should be sent here. |
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# Python has: 'posix' == os.name |
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14
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100
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}; |
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36
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32
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33
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sub new($;$) |
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{ |
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2
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2
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0
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1319
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my ($class, $opts) = @_; |
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2
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$opts = hash_merge($opts, DEFAULT_INIT_OPTS); |
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my $self = { |
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input => undef, |
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output => undef, |
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session => undef, |
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buf => '', # Read buffer |
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state => 'disconnected', |
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logger => $opts->{logger}, |
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2
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35
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line_edit => 0 |
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}; |
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2
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8
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bless $self, $class; |
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2
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50
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43
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$self->open($opts) if $opts->{open}; |
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1
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3
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return $self; |
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} |
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51
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sub is_connected($) |
52
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{ |
53
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0
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0
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0
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0
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my $self = shift; |
54
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$self->{state} = 'connected' if |
55
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0
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0
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0
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0
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$self->{inout} and $self->{inout}->connected; |
56
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0
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0
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return $self->{state} eq 'connected'; |
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} |
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59
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sub is_interactive($) { |
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0
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0
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0
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0
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my $self = shift; |
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0
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0
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return -t $self->{input}; |
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} |
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64
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65
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sub have_term_readline($) |
66
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{ |
67
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0
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0
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0
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0
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return 0; |
68
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} |
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70
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# Closes server connection. |
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sub close |
72
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{ |
73
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0
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0
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0
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0
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my $self = shift; |
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0
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0
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$self->{state} = 'closing'; |
75
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0
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0
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0
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if ($self->{inout}) { |
76
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0
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0
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close($self->{inout}) ; |
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} |
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0
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0
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$self->{state} = 'disconnected'; |
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0
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0
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0
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print {$self->{logger}} "Disconnected\n" if $self->{logger}; |
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0
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80
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} |
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82
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sub open($;$) |
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{ |
84
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2
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2
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0
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8
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my ($self, $opts) = @_; |
85
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2
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8
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$opts = hash_merge($opts, SERVER_SOCKET_OPTS); |
86
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2
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83
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$self->{host} = $opts->{host}; |
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2
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12
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$self->{port} = $opts->{port}; |
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$self->{server} = |
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IO::Socket::INET->new( |
90
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LocalPort => $self->{port}, |
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LocalAddr => $self->{host}, |
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2
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49
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Type => SOCK_STREAM, |
93
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Reuse => 1, |
94
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Listen => 1 # or SOMAXCONN |
95
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96
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); |
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die "Can't open socket host $self->{host}, port $self->{port}\n" unless |
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2
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100
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1374
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$self->{server}; |
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# @server.setsockopt(Socket::SOL_SOCKET, Socket::SO_RCVTIMEO, 5) |
100
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# # @opts[:timeout]) |
101
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1
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7
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$self->{state} = 'listening'; |
102
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} |
103
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104
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sub is_empty($) |
105
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{ |
106
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0
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0
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0
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my($self) = @_; |
107
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0
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0 == length($self->{buf}); |
108
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} |
109
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110
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# Read one message unit. It's possible however that |
111
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# more than one message will be set in a receive, so we will |
112
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# have to buffer that for the next read. |
113
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# EOFError will be raised on EOF. |
114
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sub read_msg($) |
115
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{ |
116
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0
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0
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0
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my($self) = @_; |
117
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0
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0
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$self->wait_for_connect unless $self->is_connected; |
118
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0
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my ($buf, $data, $info); |
119
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0
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0
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while (!$self->{buf} || is_empty($self)) { |
120
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0
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$self->{session}->recv($self->{buf}, TCP_MAX_PACKET); |
121
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} |
122
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0
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eval { |
123
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0
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($self->{buf}, $data) = unpack_msg($self->{buf}); |
124
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}; |
125
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0
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0
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if ($EVAL_ERROR) { |
126
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0
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$self->{buf} = ''; |
127
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0
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die $EVAL_ERROR; |
128
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} |
129
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0
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return $data; |
130
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} |
131
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132
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sub wait_for_connect |
133
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{ |
134
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0
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0
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0
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my($self) = @_; |
135
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0
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0
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if ($self->{logger}) { |
136
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my $msg = sprintf("Waiting for a connection on port %d at " . |
137
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"address %s...", |
138
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0
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$self->{port}, $self->{host}); |
139
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0
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print {$self->{logger}} "$msg\n"; |
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0
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140
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} |
141
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$self->{input} = $self->{output} = $self->{session} = |
142
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0
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$self->{server}->accept; |
143
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0
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0
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print {$self->{logger}} "Got connection\n" if $self->{logger}; |
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0
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144
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0
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$self->{state} = 'connected'; |
145
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} |
146
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147
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# This method the debugger uses to write. In contrast to |
148
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# writeline, no newline is added to the } to `str'. Also |
149
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# msg doesn't have to be a string. |
150
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sub write($$) |
151
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{ |
152
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0
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0
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0
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my($self, $msg) = @_; |
153
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0
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0
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$self->wait_for_connect unless $self->is_connected; |
154
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# FIXME: do we have to check the size of msg and split output? |
155
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0
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$self->{session}->print(pack_msg($msg)); |
156
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} |
157
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158
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sub writeline($$) |
159
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{ |
160
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0
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0
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0
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my($self, $msg) = @_; |
161
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0
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$self->write($msg . "\n"); |
162
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} |
163
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164
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# Demo |
165
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unless (caller) { |
166
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my $server = Devel::Trepan::IO::TCPServer->new( |
167
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{ open => 1, |
168
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port => 1027, |
169
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}); |
170
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if (scalar @ARGV) { |
171
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printf "Listening for connection...\n"; |
172
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my $line = $server->read_msg; |
173
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while (defined($line)) { |
174
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chomp $line; |
175
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print "Got: $line\n"; |
176
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last if $line eq 'quit'; |
177
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$line = $server->read_msg; |
178
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} |
179
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# $server->open; |
180
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# Thread.new do |
181
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# while 1 do |
182
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# begin |
183
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# line = server.read_msg.chomp |
184
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# puts "got #{line}" |
185
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# rescue EOFError |
186
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# puts 'Got EOF' |
187
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# break |
188
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# } |
189
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# } |
190
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# } |
191
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# threads << Thread.new do |
192
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# t = TCPSocket.new('localhost', 1027) |
193
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# while 1 do |
194
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# begin |
195
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# print "input? " |
196
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# line = STDIN.gets |
197
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# break if !line || line.chomp == 'quit' |
198
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# t.puts(pack_msg(line)) |
199
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# rescue EOFError |
200
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# puts "Got EOF" |
201
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# break |
202
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# rescue Exception => e |
203
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# puts "Got #{e}" |
204
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# break |
205
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# } |
206
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# } |
207
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# t.close |
208
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# } |
209
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# threads.each {|t| t.join } |
210
|
|
|
|
|
|
|
$server->close; |
211
|
|
|
|
|
|
|
} |
212
|
|
|
|
|
|
|
} |
213
|
|
|
|
|
|
|
|
214
|
|
|
|
|
|
|
1; |