line |
stmt |
bran |
cond |
sub |
pod |
time |
code |
1
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package Shardcache::Client; |
2
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3
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1
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1
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55857
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use strict; |
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1
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3
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1
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81
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4
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1
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1
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1298
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use IO::Socket::INET; |
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1
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31504
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1
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12
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5
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1
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1
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1881
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use Digest::SipHash qw/siphash64/; |
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1
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1544
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1
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71
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6
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1
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1
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967
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use Algorithm::ConsistentHash::CHash; |
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1
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583
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1
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2526
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7
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8
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our $VERSION = "0.02"; |
9
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10
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sub new { |
11
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0
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0
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0
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my ($class, $host, $secret) = @_; |
12
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13
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0
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0
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croak("The host parameter is mandatory!") |
14
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unless($host); |
15
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16
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0
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0
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$secret = '' unless($secret); |
17
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18
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0
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my $self = { |
19
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_secret => $secret, |
20
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_nodes => [], |
21
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}; |
22
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23
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24
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0
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0
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0
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if (ref($host) && ref($host) eq "ARRAY") { |
25
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0
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$self->{_port} = []; |
26
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0
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foreach my $h (@$host) { |
27
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0
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0
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if ($h !~ /[a-zA-Z0-9_\.]+:[a-zA-Z0-9_\.]+(:[0-9]+)?/) { |
28
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0
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die "Invalid host string $h"; |
29
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} |
30
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0
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my ($label, $addr, $port) = split(':', $h); |
31
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0
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push(@{$self->{_nodes}}, { |
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0
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32
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label => $label, |
33
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addr => $addr, |
34
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port => $port }); |
35
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} |
36
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0
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$self->{_chash} = Algorithm::ConsistentHash::CHash->new( |
37
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0
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ids => [map { $_->{label} } @{$self->{_nodes}} ], |
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0
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38
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replicas => 200); |
39
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} else { |
40
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0
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0
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if ($host !~ /[a-zA-Z0-9_\.]+:[a-zA-Z0-9_\.]+(:[0-9]+)?/) { |
41
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0
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die "Invalid host string $host"; |
42
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} |
43
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0
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my ($addr, $port) = split(':', $host); |
44
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0
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push(@{$self->{_nodes}}, { |
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0
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45
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addr => $addr, |
46
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port => $port |
47
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}); |
48
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} |
49
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50
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0
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bless $self, $class; |
51
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52
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0
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return $self; |
53
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} |
54
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55
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sub _chunkize_var { |
56
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0
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0
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my ($var) = @_; |
57
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0
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my $templ; |
58
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my @vars; |
59
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0
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my $vlen = length($var); |
60
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0
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while ($vlen > 0) { |
61
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0
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0
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if ($vlen <= 65535) { |
62
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0
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$templ .= "na$vlen"; |
63
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0
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push(@vars, $vlen, $var); |
64
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0
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$vlen = 0; |
65
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} else { |
66
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0
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$templ .= "na65535"; |
67
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0
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my $substr = substr($var, 0, 65535, ""); |
68
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0
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$vlen = length($var); |
69
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0
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push(@vars, 65535, $substr); |
70
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} |
71
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} |
72
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0
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return pack $templ, @vars; |
73
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} |
74
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75
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sub send_msg { |
76
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0
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0
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0
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my ($self, $hdr, $key, $value, $expire, $sock) = @_; |
77
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78
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0
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my $templ = "C"; |
79
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0
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my @vars = ($hdr); |
80
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81
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0
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0
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if ($key) { |
82
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0
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my $kbuf = _chunkize_var($key); |
83
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0
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$templ .= sprintf "a%dCC", length($kbuf); |
84
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0
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push @vars, $kbuf, 0x00, 0x00; |
85
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} else { |
86
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0
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$templ .= "CC"; |
87
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0
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push @vars, 0x00, 0x00; |
88
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} |
89
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90
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0
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0
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if ($value) { |
91
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0
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$templ .= "C"; |
92
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0
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push @vars, 0x80; |
93
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94
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0
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my $vbuf = _chunkize_var($value); |
95
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96
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0
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$templ .= sprintf "a%dCC", length($vbuf); |
97
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0
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push @vars, $vbuf, 0x00, 0x00; |
98
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0
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0
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if ($expire) { |
99
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0
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$templ .= "CCCNCC"; |
100
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0
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push @vars, 0x80, 0x00, 0x04, $expire, 0x00, 0x00; |
101
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} |
102
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} |
103
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104
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0
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$templ .= "C"; |
105
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0
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push @vars, 0x00; |
106
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107
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0
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my $msg = pack $templ, @vars; |
108
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109
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0
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0
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if ($self->{_secret}) { |
110
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0
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my $sig = siphash64($msg, pack("a16", $self->{_secret})); |
111
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0
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$msg .= pack("Q", $sig); |
112
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} |
113
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114
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0
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my $addr; |
115
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|
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my $port; |
116
|
|
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117
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0
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0
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if (!$sock) { |
118
|
0
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0
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if (@{$self->{_nodes}} == 1) { |
|
0
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|
119
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0
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$addr = $self->{_nodes}->[0]->{addr}; |
120
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0
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|
$port = $self->{_nodes}->[0]->{port}; |
121
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|
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} else { |
122
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0
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|
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my ($node) = grep { $_->{label} eq $self->{_chash}->lookup($key) } @{$self->{_nodes}}; |
|
0
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0
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123
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0
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0
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if ($node) { |
124
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0
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$addr = $node->{addr}; |
125
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0
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$port = $node->{port}; |
126
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} else { |
127
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0
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my $index = rand() % @{$self->{_nodes}}; |
|
0
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128
|
0
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$addr = $self->{_nodes}->[$index]->{addr}; |
129
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0
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$port = $self->{_nodes}->[$index]->{port}; |
130
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} |
131
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132
|
|
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} |
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 (!$self->{_sock}->{"$addr:$port"} || !$self->{_sock}->{"$addr:$port"}->connected || |
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0
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135
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$self->{_sock}->{"$addr:$port"}->write(pack("C4", 0x90, 0x00, 0x00, 0x00)) != 4) |
136
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|
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{ |
137
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0
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$self->{_sock}->{"$addr:$port"} = IO::Socket::INET->new(PeerAddr => $addr, |
138
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PeerPort => $port, |
139
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|
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Proto => 'tcp'); |
140
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|
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} |
141
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|
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142
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0
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$sock = $self->{_sock}->{"$addr:$port"}; |
143
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} |
144
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145
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0
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my $wb = $sock->write($msg); |
146
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147
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# read the response |
148
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0
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my $in; |
149
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my $data; |
150
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151
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152
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# read the header |
153
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0
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0
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if (read($sock, $data, 1) != 1) { |
154
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0
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|
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delete $self->{_sock}->{"$addr:$port"}; |
155
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0
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|
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return undef; |
156
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|
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} |
157
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158
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0
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$in .= $data; |
159
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|
160
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0
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my $stop = 0; |
161
|
0
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my $out; |
162
|
|
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163
|
|
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|
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# read the records |
164
|
0
|
|
|
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|
while (!$stop) { |
165
|
0
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0
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|
|
|
|
if (read($sock, $data, 2) != 2) { |
166
|
0
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|
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|
return undef; |
167
|
|
|
|
|
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|
} |
168
|
0
|
|
|
|
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|
my ($len) = unpack("n", $data); |
169
|
0
|
|
|
|
|
|
$in .= $data; |
170
|
0
|
|
|
|
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|
while ($len) { |
171
|
0
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|
|
|
|
|
my $rb = read($sock, $data, $len); |
172
|
0
|
0
|
|
|
|
|
if ($rb <= 0) { |
173
|
0
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|
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|
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|
return undef; |
174
|
|
|
|
|
|
|
} |
175
|
0
|
|
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|
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|
$in .= $data; |
176
|
0
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|
|
|
|
$out .= $data; |
177
|
0
|
|
|
|
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|
$len -= $rb; |
178
|
0
|
0
|
|
|
|
|
if ($len == 0) { |
179
|
0
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0
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|
|
|
|
if (read($sock, $data, 2) != 2) { |
180
|
0
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|
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|
return undef; |
181
|
|
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|
|
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|
} |
182
|
0
|
|
|
|
|
|
($len) = unpack("n", $data); |
183
|
0
|
|
|
|
|
|
$in .= $data; |
184
|
|
|
|
|
|
|
} |
185
|
|
|
|
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} |
186
|
|
|
|
|
|
|
|
187
|
0
|
0
|
|
|
|
|
if (read($sock, $data, 1) != 1) { |
188
|
0
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|
|
|
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|
return undef; |
189
|
|
|
|
|
|
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} |
190
|
0
|
|
|
|
|
|
$in .= $data; |
191
|
0
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|
|
|
|
|
my ($sep) = unpack("C", $data); |
192
|
0
|
0
|
|
|
|
|
$stop = 1 if ($sep == 0); |
193
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|
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|
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|
|
# TODO - should check if it's a correct rsep (0x80) |
194
|
|
|
|
|
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|
} |
195
|
|
|
|
|
|
|
|
196
|
0
|
0
|
|
|
|
|
if ($self->{_secret}) { |
197
|
|
|
|
|
|
|
# now that we have the whole message, let's compute the signature |
198
|
|
|
|
|
|
|
# (we know it's 8 bytes long and is the trailer of the message |
199
|
0
|
|
|
|
|
|
my $signature = siphash64(substr($in, 0, length($in)), pack("a16", $self->{_secret})); |
200
|
|
|
|
|
|
|
|
201
|
0
|
|
|
|
|
|
my $csig = pack("Q", $signature); |
202
|
|
|
|
|
|
|
|
203
|
0
|
|
|
|
|
|
my $rb = read($sock, $data, 8); |
204
|
0
|
0
|
|
|
|
|
if ($rb != 8) { |
205
|
0
|
|
|
|
|
|
return undef; |
206
|
|
|
|
|
|
|
} |
207
|
|
|
|
|
|
|
|
208
|
|
|
|
|
|
|
# $chunk now points at the signature |
209
|
0
|
0
|
|
|
|
|
if ($csig ne $data) { |
210
|
0
|
|
|
|
|
|
return undef; |
211
|
|
|
|
|
|
|
} |
212
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|
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} |
213
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214
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0
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return $out; |
215
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} |
216
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217
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sub get { |
218
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0
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0
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0
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my ($self, $key) = @_; |
219
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0
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0
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return unless $key; |
220
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0
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|
return $self->send_msg(0x01, $key); |
221
|
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|
} |
222
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223
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sub set { |
224
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0
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|
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0
|
0
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|
my ($self, $key, $value, $expire) = @_; |
225
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0
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0
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0
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|
return unless $key && defined $value; |
226
|
0
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|
my $resp = $self->send_msg(0x02, $key, $value, $expire); |
227
|
0
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|
0
|
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|
return (defined $resp && $resp eq "OK") |
228
|
|
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|
|
|
} |
229
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|
230
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|
sub del { |
231
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0
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|
|
0
|
0
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|
my ($self, $key) = @_; |
232
|
0
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0
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|
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|
|
return unless $key; |
233
|
0
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|
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|
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|
my $resp = $self->send_msg(0x03, $key); |
234
|
0
|
|
|
|
|
|
return ($resp eq "OK") |
235
|
|
|
|
|
|
|
} |
236
|
|
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|
|
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|
|
237
|
|
|
|
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|
|
sub evi { |
238
|
0
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|
|
0
|
0
|
|
my ($self, $key) = @_; |
239
|
0
|
0
|
|
|
|
|
return unless $key; |
240
|
0
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|
|
|
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|
my $resp = $self->send_msg(0x04, $key); |
241
|
0
|
|
|
|
|
|
return ($resp eq "OK") |
242
|
|
|
|
|
|
|
} |
243
|
|
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|
|
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|
|
244
|
|
|
|
|
|
|
sub mgb { |
245
|
0
|
|
|
0
|
0
|
|
my ($self, $key) = @_; |
246
|
0
|
0
|
|
|
|
|
return unless $key; |
247
|
0
|
|
|
|
|
|
my $resp = $self->send_msg(0x04, $key); |
248
|
0
|
|
|
|
|
|
return ($resp eq "OK") |
249
|
|
|
|
|
|
|
} |
250
|
|
|
|
|
|
|
|
251
|
|
|
|
|
|
|
sub mga { |
252
|
0
|
|
|
0
|
0
|
|
my ($self, $key) = @_; |
253
|
0
|
0
|
|
|
|
|
return unless $key; |
254
|
0
|
|
|
|
|
|
my $resp = $self->send_msg(0x04, $key); |
255
|
0
|
|
|
|
|
|
return ($resp eq "OK") |
256
|
|
|
|
|
|
|
} |
257
|
|
|
|
|
|
|
|
258
|
|
|
|
|
|
|
sub _get_sock_for_peer { |
259
|
0
|
|
|
0
|
|
|
my ($self, $peer) = @_; |
260
|
0
|
|
|
|
|
|
my $addr; |
261
|
|
|
|
|
|
|
my $port; |
262
|
|
|
|
|
|
|
|
263
|
0
|
0
|
|
|
|
|
if (@{$self->{_nodes}} == 1) { |
|
0
|
|
|
|
|
|
|
264
|
0
|
|
|
|
|
|
$addr = $self->{_nodes}->[0]->{addr}; |
265
|
0
|
|
|
|
|
|
$port = $self->{_nodes}->[0]->{port}; |
266
|
|
|
|
|
|
|
} else { |
267
|
0
|
|
|
|
|
|
my ($node) = grep { $_->{label} eq $peer } @{$self->{_nodes}}; |
|
0
|
|
|
|
|
|
|
|
0
|
|
|
|
|
|
|
268
|
0
|
0
|
|
|
|
|
if ($node) { |
269
|
0
|
|
|
|
|
|
$addr = $node->{addr}; |
270
|
0
|
|
|
|
|
|
$port = $node->{port}; |
271
|
|
|
|
|
|
|
} else { |
272
|
0
|
|
|
|
|
|
return undef; |
273
|
|
|
|
|
|
|
} |
274
|
|
|
|
|
|
|
} |
275
|
0
|
0
|
0
|
|
|
|
if (!$self->{_sock}->{"$addr:$port"} || !$self->{_sock}->{"$addr:$port"}->connected) { |
276
|
0
|
|
|
|
|
|
$self->{_sock}->{"$addr:$port"} = IO::Socket::INET->new(PeerAddr => $addr, |
277
|
|
|
|
|
|
|
PeerPort => $port, |
278
|
|
|
|
|
|
|
Proto => 'tcp'); |
279
|
|
|
|
|
|
|
} |
280
|
0
|
|
|
|
|
|
return $self->{_sock}->{"$addr:$port"}; |
281
|
|
|
|
|
|
|
} |
282
|
|
|
|
|
|
|
|
283
|
|
|
|
|
|
|
sub chk { |
284
|
0
|
|
|
0
|
0
|
|
my ($self, $peer) = @_; |
285
|
0
|
|
|
|
|
|
my $sock = $self->_get_sock_for_peer($peer); |
286
|
|
|
|
|
|
|
|
287
|
0
|
0
|
|
|
|
|
return unless $sock; |
288
|
|
|
|
|
|
|
|
289
|
0
|
|
|
|
|
|
my $resp = $self->send_msg(0x31, undef, undef, undef, $sock); |
290
|
0
|
|
|
|
|
|
return ($resp eq "OK"); |
291
|
|
|
|
|
|
|
} |
292
|
|
|
|
|
|
|
|
293
|
|
|
|
|
|
|
sub sts { |
294
|
0
|
|
|
0
|
0
|
|
my ($self, $peer) = @_; |
295
|
|
|
|
|
|
|
|
296
|
0
|
|
|
|
|
|
my $sock = $self->_get_sock_for_peer($peer); |
297
|
|
|
|
|
|
|
|
298
|
0
|
0
|
|
|
|
|
return unless $sock; |
299
|
|
|
|
|
|
|
|
300
|
0
|
|
|
|
|
|
my $resp = $self->send_msg(0x32, undef, undef, undef, $sock); |
301
|
0
|
|
|
|
|
|
return $resp; |
302
|
|
|
|
|
|
|
} |
303
|
|
|
|
|
|
|
|
304
|
|
|
|
|
|
|
1; |
305
|
|
|
|
|
|
|
__END__ |