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=pod |
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=head1 NAME |
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WGmeta::Parser::Conf - Parser for Wireguard configurations |
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=head1 SYNOPSIS |
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use Wireguard::WGmeta::Parser::Conf; |
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use Wireguard::WGmeta::Util; |
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# Parse a wireguard configuration file |
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my $config_contents = read_file('/path/to/config.conf', 'interface_name'); |
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# Define callbacks |
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my $on_every_value_callback = sub($attribute, $value, $is_wg_meta){ |
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# do you magic |
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return $attribute, $value; |
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}; |
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my $on_every_section_callback = sub($identifier, $section_type, $is_disabled){ |
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# do you magic |
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return $identifier; |
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}; |
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# And finally parse the configuration |
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my $parsed_config = parse_raw_wg_config($config_contents, $on_every_value_callback, $on_every_section_callback); |
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=head1 DESCRIPTION |
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Parser for Wireguard I<.conf> files with support for custom attributes. A possible implementation is present in L. |
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=head1 METHODS |
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=cut |
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37
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package Wireguard::WGmeta::Parser::Conf; |
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use strict; |
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5
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170
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39
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use warnings FATAL => 'all'; |
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5
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use experimental 'signatures'; |
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42
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5
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5
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535
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use constant INTERNAL_KEY_PREFIX => 'int_'; |
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10
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5
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432
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5
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use base 'Exporter'; |
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4811
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45
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our @EXPORT = qw(parse_raw_wg_config INTERNAL_KEY_PREFIX); |
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47
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our $VERSION = "0.3.2"; |
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49
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=head3 parse_raw_wg_config($file_content, $on_every_value, $on_new_section [, $skip, $wg_meta_prefix, $wg_disabled_prefix]) |
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51
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Parses a Wireguard configuration |
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=over 1 |
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55
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=item * |
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57
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C<$file_content> Content of Wireguard configuration. Warning, if have to ensure that its a valid file! |
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59
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=item * |
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61
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C<$on_every_value> A reference to a callback function, fired at every key/value pair. Expected signature: |
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63
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my $on_every_value_callback = sub($attribute, $value, $is_wg_meta){ |
64
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# do you magic |
65
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return $attribute, $value; |
66
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}; |
67
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68
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=item * |
69
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70
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C<$on_new_section> Callback for every section. Expected signature: |
71
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72
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my $on_every_section_callback = sub($identifier, $section_type, $is_disabled){ |
73
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# do you magic |
74
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return $identifier; |
75
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}; |
76
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77
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=item * |
78
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79
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C<[$skip = 0]> When you want to skip some lines at the beginning |
80
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81
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=item * |
82
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83
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C<[$wg_meta_prefix = '#+']> wg-meta prefix. Must start with '#' or ';' |
84
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85
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=item * |
86
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87
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C<[$disabled_prefix = '#-']> disabled prefix. Must start with '#' or ';' |
88
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89
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=back |
90
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91
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B |
92
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93
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A reference to a hash similar as described in L. |
94
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95
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=cut |
96
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42
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42
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1
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76
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sub parse_raw_wg_config($file_content, $on_every_value, $on_new_section, $skip = 0, $wg_meta_prefix = '#+', $wg_disabled_prefix = '#-') { |
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42
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73
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42
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67
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42
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68
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42
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62
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42
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72
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42
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83
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42
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57
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97
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42
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89
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my $IDENT_KEY = ''; |
98
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42
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65
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my $IS_ACTIVE_COUNTER = 0; |
99
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42
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63
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my $IS_ROOT = 1; |
100
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42
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63
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my $SECTION_TYPE = 'Root'; |
101
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42
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72
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my $IS_WG_META = 0; |
102
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103
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42
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87
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my $parsed_config = {}; |
104
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42
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103
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my @peer_order; |
105
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my @root_order; |
106
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107
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42
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67
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my $section_data = {}; |
108
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42
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76
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my @section_order; |
109
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42
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68
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my $generic_autokey = 0; |
110
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42
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73
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my $line_count = 0; |
111
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112
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my $section_handler = sub { |
113
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157
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100
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157
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305
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if ($IS_ROOT) { |
114
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42
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108
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$parsed_config = $section_data; |
115
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42
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98
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$section_data = {}; |
116
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} |
117
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else { |
118
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115
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100
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260
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my $is_disabled = $IS_ACTIVE_COUNTER == 1 ? 1 : 0; |
119
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115
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210
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my $identifier = &{$on_new_section}($section_data->{$IDENT_KEY}, $SECTION_TYPE, $is_disabled); |
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115
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280
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120
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115
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50
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275
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die "`$identifier` is already present" if exists($parsed_config->{$identifier}); |
121
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115
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331
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$section_data->{INTERNAL_KEY_PREFIX . 'order'} = [ @section_order ]; |
122
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115
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238
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$section_data->{'disabled'} = $is_disabled; |
123
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115
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254
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$section_data->{INTERNAL_KEY_PREFIX . 'type'} = $SECTION_TYPE; |
124
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115
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712
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$parsed_config->{$identifier} = { %$section_data }; |
125
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115
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265
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push @peer_order, $identifier; |
126
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115
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346
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$section_data = {}; |
127
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} |
128
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129
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157
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319
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@section_order = (); |
130
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157
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260
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$IDENT_KEY = 'PublicKey'; |
131
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157
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230
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$IS_ACTIVE_COUNTER--; |
132
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157
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227
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$IS_ROOT = 0; |
133
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42
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211
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}; |
134
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135
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42
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536
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for my $line (split "\n", $file_content) { |
136
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719
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1028
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$line_count++; |
137
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719
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50
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1332
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next if $line_count <= $skip; |
138
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139
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# Strip-of any leading or trailing whitespace |
140
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719
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3676
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$line =~ s/^\s+|\s+$//g; |
141
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142
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719
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100
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1540
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if ((substr $line, 0, 2) eq $wg_disabled_prefix) { |
143
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7
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14
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$line = substr $line, 2; |
144
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7
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100
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14
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$IS_ACTIVE_COUNTER = 2 if $IS_ACTIVE_COUNTER != 1; |
145
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} |
146
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719
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100
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1319
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if ((substr $line, 0, 2) eq $wg_meta_prefix) { |
147
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# Also slice-off wg-meta prefixes |
148
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88
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268
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$line = substr $line, 2; |
149
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88
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130
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$IS_WG_META = 1; |
150
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} |
151
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else { |
152
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631
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885
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$IS_WG_META = 0; |
153
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} |
154
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155
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# skip empty lines |
156
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719
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100
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1344
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next unless $line; |
157
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158
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# Simply decide if we are in an interface or peer section |
159
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623
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100
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1357
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if ((substr $line, 0, 11) eq '[Interface]') { |
160
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42
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122
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&$section_handler(); |
161
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42
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79
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$SECTION_TYPE = 'Interface'; |
162
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42
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77
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$IDENT_KEY = 'PrivateKey'; |
163
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42
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94
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next; |
164
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} |
165
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581
|
100
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1128
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if ((substr $line, 0, 6) eq '[Peer]') { |
166
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73
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176
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&$section_handler(); |
167
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73
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119
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$SECTION_TYPE = 'Peer'; |
168
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73
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115
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$IDENT_KEY = 'PublicKey'; |
169
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73
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167
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next; |
170
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} |
171
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508
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750
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my ($definitive_key, $definitive_value, $discard); |
172
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508
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100
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988
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unless ((substr $line, 0, 1) eq '#') { |
173
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491
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918
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my ($raw_key, $raw_value) = _split_and_trim($line, '='); |
174
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491
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1333
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($definitive_key, $definitive_value, $discard) = &$on_every_value($raw_key, $raw_value, $IS_WG_META); |
175
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491
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100
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1205
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next if $discard == 1; |
176
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177
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# Update identity key if changed |
178
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474
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100
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978
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$IDENT_KEY = $definitive_key if $raw_key eq $IDENT_KEY; |
179
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} |
180
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else { |
181
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# Handle "normal" comments |
182
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17
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46
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$definitive_key = "comment_$generic_autokey"; |
183
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17
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30
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$definitive_value = $line; |
184
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|
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} |
185
|
491
|
|
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|
|
1051
|
$section_data->{$definitive_key} = $definitive_value; |
186
|
491
|
50
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|
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1064
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$IS_ROOT ? push @root_order, $definitive_key : push @section_order, $definitive_key; |
187
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491
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|
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|
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987
|
$generic_autokey++; |
188
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|
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} |
189
|
|
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|
# and finalize |
190
|
42
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|
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167
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&$section_handler(); |
191
|
42
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|
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|
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101
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$parsed_config->{INTERNAL_KEY_PREFIX . 'section_order'} = \@peer_order; |
192
|
42
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|
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96
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$parsed_config->{INTERNAL_KEY_PREFIX . 'root_order'} = \@root_order; |
193
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|
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194
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42
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|
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|
|
409
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return $parsed_config; |
195
|
|
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} |
196
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|
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|
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197
|
491
|
|
|
491
|
|
654
|
sub _split_and_trim($line, $separator) { |
|
491
|
|
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723
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491
|
|
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|
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736
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|
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491
|
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630
|
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198
|
491
|
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|
|
4512
|
return map {s/^\s+|\s+$//g; |
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982
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|
5066
|
|
199
|
982
|
|
|
|
|
2779
|
$_} split $separator, $line, 2; |
200
|
|
|
|
|
|
|
} |
201
|
|
|
|
|
|
|
|
202
|
|
|
|
|
|
|
1; |