|  line  | 
 stmt  | 
 bran  | 
 cond  | 
 sub  | 
 pod  | 
 time  | 
 code  | 
| 
1
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 package Port::Generator ;  | 
| 
2
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2
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2
  
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 | 
1038
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 use strict;  | 
| 
 
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2
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3
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    | 
| 
 
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2
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49
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    | 
| 
3
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2
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2
  
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8
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 use warnings;  | 
| 
 
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2
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2
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    | 
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2
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78
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    | 
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4
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    | 
| 
5
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 our $VERSION = '0.1.3';  | 
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6
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    | 
| 
7
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2
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2
  
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904
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 use IO::Socket::INET;  | 
| 
 
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2
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28473
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    | 
| 
 
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2
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11
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    | 
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8
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 use Class::Tiny {  | 
| 
9
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2
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12
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     min   => 49152,  | 
| 
10
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     max   => 65535,  | 
| 
11
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     proto => 'tcp',  | 
| 
12
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     addr  => 'localhost',  | 
| 
13
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2
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2
  
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1623
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 };  | 
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2
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4255
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    | 
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14
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    | 
| 
15
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 =head1 NAME  | 
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16
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    | 
| 
17
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 Port::Generator - pick some unused port  | 
| 
18
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    | 
| 
19
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 =head1 SYNOPSIS  | 
| 
20
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    | 
| 
21
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     my $port_gen = Port::Generator->new();  | 
| 
22
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     $port_gen->port();  | 
| 
23
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    | 
| 
24
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 =head1 DESCRIPTION  | 
| 
25
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    | 
| 
26
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 This module is used to find a free port,  | 
| 
27
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 by default in the range 49152 to 65535,  | 
| 
28
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 but you can change the range of ports that will be checked.  | 
| 
29
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    | 
| 
30
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 =head1 METHODS  | 
| 
31
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    | 
| 
32
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 =head2 new(%attributes)  | 
| 
33
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    | 
| 
34
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 =head3 %attributes  | 
| 
35
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    | 
| 
36
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 =head4 min  | 
| 
37
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    | 
| 
38
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 | 
 lowest numbered port to consider  | 
| 
39
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    | 
| 
40
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 default I<49152>  | 
| 
41
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    | 
| 
42
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 The range 49152-65535 is commonly used by applications that utilize a  | 
| 
43
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 dynamic/random/configurable port.  | 
| 
44
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    | 
| 
45
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 =head4 max  | 
| 
46
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    | 
| 
47
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 | 
 highest numbered port to consider  | 
| 
48
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    | 
| 
49
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 default I<65535>  | 
| 
50
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    | 
| 
51
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 =head4 proto  | 
| 
52
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    | 
| 
53
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 socket protocol  | 
| 
54
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    | 
| 
55
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 default I  | 
| 
56
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    | 
| 
57
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 =head4 addr  | 
| 
58
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    | 
| 
59
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 | 
 local address  | 
| 
60
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    | 
| 
61
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 default I  | 
| 
62
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    | 
| 
63
 | 
 
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 | 
 =head2 port()  | 
| 
64
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
65
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 Tries to find an unused port from C-C ports range,  | 
| 
66
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 checking each port in turn until it finds an available one.  | 
| 
67
 | 
 
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    | 
| 
68
 | 
 
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 =cut  | 
| 
69
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 | 
    | 
| 
70
 | 
 
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 | 
 
 | 
 
 | 
 
 | 
 
 | 
 sub port {  | 
| 
71
 | 
7
 | 
 
 | 
 
 | 
  
7
  
 | 
  
1
  
 | 
4818
 | 
     my ($self) = @_;  | 
| 
72
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
73
 | 
7
 | 
 
 | 
 
 | 
 
 | 
 
 | 
140
 | 
     foreach my $port ($self->min .. $self->max) {  | 
| 
74
 | 
10
 | 
 
 | 
 
 | 
 
 | 
 
 | 
294
 | 
         my $sock = IO::Socket::INET->new(  | 
| 
75
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
             LocalAddr => $self->addr,  | 
| 
76
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
             LocalPort => $port,  | 
| 
77
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
             Proto     => $self->proto,  | 
| 
78
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
         );  | 
| 
79
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
80
 | 
10
 | 
  
100
  
 | 
 
 | 
 
 | 
 
 | 
2376
 | 
         if ($sock) {  | 
| 
81
 | 
7
 | 
 
 | 
 
 | 
 
 | 
 
 | 
51
 | 
             close $sock;  | 
| 
82
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
83
 | 
7
 | 
 
 | 
 
 | 
 
 | 
 
 | 
28
 | 
             return $port;  | 
| 
84
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
         }  | 
| 
85
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
     }  | 
| 
86
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
87
 | 
0
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
     return;  | 
| 
88
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 }  | 
| 
89
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
90
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 =head1 SEE ALSO  | 
| 
91
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
92
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 L (part of the C distribution,  | 
| 
93
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 provides a function C  | 
| 
94
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 which does the same thing as the C method in this module.  | 
| 
95
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
96
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 =head1 LICENSE  | 
| 
97
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
98
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 Copyright (C) Avast Software.  | 
| 
99
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
100
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 This library is free software; you can redistribute it and/or modify  | 
| 
101
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 it under the same terms as Perl itself.  | 
| 
102
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
103
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 =head1 AUTHOR  | 
| 
104
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
105
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 Jan Seidl Eseidl@avast.comE  | 
| 
106
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
107
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 =cut  | 
| 
108
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
    | 
| 
109
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 
 | 
 1;  |