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package Net::DHCP::Config::Utilities::Generator::ISC_DHCPD; |
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use 5.006; |
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use strict; |
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use warnings; |
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use Template; |
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use Net::DHCP::Config::Utilities::Options; |
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use String::ShellQuote; |
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=head1 NAME |
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Net::DHCP::Config::Utilities::Generator::ISC_DHCPD - Generates a config for ISC DHCPD from the supplied subnets. |
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=head1 VERSION |
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Version 0.1.0 |
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=cut |
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our $VERSION = '0.1.0'; |
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=head1 SYNOPSIS |
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use Net::DHCP::Config::Utilities::Generator::ISC_DHCPD; |
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my $options={ |
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output=>'./dhcp/dhcpd.conf', |
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header=>'./dhcp/header.tt', |
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footer=>'./dhcp/footer.tt', |
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args=>{}, |
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}; |
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my $generator = Net::DHCP::Config::Utilities::Subnet->new( $options ); |
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eval{ |
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$generator->generate( $dhcp_util ); |
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}; |
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if ( $@ ){ |
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# do something upon error |
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die ( $@ ); |
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} |
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# just return it and don't write it output |
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my $config; |
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eval{ |
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$config=$generator->generate( $dhcp_util ); |
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}; |
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if ( $@ ){ |
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# do something upon error |
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die ( $@ ); |
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} |
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print $config; |
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=head1 METHODS |
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=head2 new |
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This initiates the object. |
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61
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my $options={ |
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output=>'./dhcp/dhcpd.conf', |
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header=>'./dhcp/header.tt', |
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footer=>'./dhcp/footer.tt', |
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vars=>{}, |
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}; |
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68
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my $generator = Net::DHCP::Config::Utilities::Generator::ISC_DHCPD->new( $options ); |
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=head3 args |
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=head4 output |
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74
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This is the file to write the output too. |
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=head4 header |
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This is the header template to use. |
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=head4 footer |
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This is the footer teomplate to use. |
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=head4 vars |
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This is a hash containing values to pass to L |
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as the \%vars value for when calling L->process. |
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89
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=cut |
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sub new { |
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my %args; |
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4
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if ( defined( $_[1] ) ){ |
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%args=%{$_[1]}; |
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95
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} |
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# make sure we have all the required variables |
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# also make sure footer, output, and header are not all the same files |
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if ( !defined( $args{header} ) ){ |
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100
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die( 'No header file specified' ); |
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101
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}elsif( !defined( $args{footer} ) ){ |
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0
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die( 'No footer file specified' ); |
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103
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}elsif( !defined( $args{output} ) ){ |
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0
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die( 'No output file specified' ); |
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}elsif( !defined( $args{vars} ) ){ |
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0
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die( 'No vars hash defined' ); |
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}elsif( ! -f $args{header} ){ |
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die( '"'.$args{header}.'" does not exist or is not a file'); |
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}elsif( ! -f $args{footer} ){ |
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die( '"'.$args{footer}.'" does not exist or is not a file'); |
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}elsif( ref( $args{vars} ) ne 'HASH' ){ |
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die( '$args{vars} is not a hash' ); |
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}elsif( $args{footer} eq $args{header} ){ |
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die( '$args{footer} and $args{header} are both the same, "'.$args{footer}.'",' ); |
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}elsif( $args{footer} eq $args{output} ){ |
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die( '$args{footer} and $args{output} are both the same, "'.$args{footer}.'",' ); |
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}elsif( $args{header} eq $args{output} ){ |
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die( '$args{header} and $args{output} are both the same, "'.$args{header}.'",' ); |
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} |
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121
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my $self={ |
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vars=>$args{vars}, |
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123
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footer=>$args{footer}, |
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header=>$args{header}, |
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output=>$args{output}, |
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1
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options=>Net::DHCP::Config::Utilities::Options->new, |
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}; |
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1
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2
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bless $self; |
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129
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130
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1
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3
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return $self; |
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} |
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133
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=head2 generate |
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135
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This gnerates the config for ISC DHCPD. |
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136
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137
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There are two options taken. |
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139
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The first and mandatory is a L object |
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140
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that contains the subnets that we want to generate a config for. |
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141
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142
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The second is we want to write the output to the file or not. This is |
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143
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optional and if set to true no output will be writen. |
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144
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145
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This will return a string with the generated config. |
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146
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147
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If it is being outputed to a file, then ISC DHCPD will be called |
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148
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as 'dhcpd -t -cf $output' to lint it. It will die if it exits |
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149
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with a non-zero value. |
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150
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151
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eval{ |
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152
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$generator->generate( $dhcp_util ); |
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153
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}; |
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154
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if ( $@ ){ |
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155
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# do something upon error |
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156
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die ( $@ ); |
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157
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} |
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158
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159
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# just return it and don't write it output |
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160
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my $config; |
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161
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eval{ |
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162
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$config=$generator->generate( $dhcp_util ); |
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163
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}; |
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164
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if ( $@ ){ |
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165
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# do something upon error |
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166
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die ( $@ ); |
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167
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} |
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168
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print $config; |
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169
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170
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=cut |
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171
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172
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sub generate{ |
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173
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1
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1
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1
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598
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my $self=$_[0]; |
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174
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1
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3
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my $object=$_[1]; |
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175
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1
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2
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my $no_write=$_[2]; |
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176
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177
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1
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50
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5
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if ( ref( $object ) ne 'Net::DHCP::Config::Utilities' ){ |
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178
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0
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0
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die( 'The passed object is not a "Net::DHCP::Config::Utilities", but "'.ref( $object ).'"' ); |
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} |
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180
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181
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# init the template object and then process the header/footer |
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182
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1
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53
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my $template=Template->new({ |
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183
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EVAL_PERL=>1, |
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184
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INTERPOLATE=>1, |
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185
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POST_CHOMP=>1, |
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186
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}); |
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187
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1
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20726
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my $header; |
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188
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$template->process( $self->{header}, $self->{vars}, \$header ) |
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189
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1
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50
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9
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|| die( 'Failed to process the header, "'.$self->{header}.'"... '.$template->error ); |
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190
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1
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33346
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my $footer; |
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191
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$template->process( $self->{footer}, $self->{vars}, \$footer ) |
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192
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1
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50
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6
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|| die( 'Failed to process the footer, "'.$self->{footer}.'"... '.$template->error ); |
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193
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194
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1
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979
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my $middle=''; |
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195
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196
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1
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9
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my @subnets=sort( $object->subnet_list ); |
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197
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1
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8
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foreach my $base ( @subnets ){ |
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2
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17
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my $subnet=$object->subnet_get( $base ); |
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199
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200
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2
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9
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my $desc=$subnet->desc_get; |
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201
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2
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100
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5
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if ( $desc ne '' ){ |
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1
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3
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$desc='# '.$desc."\n"; |
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} |
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205
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2
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10
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$middle=$middle.$desc.'subnet '.$base.' netmask '.$subnet->mask_get." {\n"; |
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206
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207
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# add any required ranges |
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208
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# unless you have static IPs in the footer you really need ranges |
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2
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7
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my @ranges=sort( $subnet->range_get ); |
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2
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4
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foreach my $range ( @ranges ){ |
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1
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3
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$middle=$middle.' range '.$range.";\n"; |
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} |
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214
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2
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11
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my @options=sort( $subnet->options_list ); |
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2
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5
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foreach my $option ( @options ){ |
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24
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40
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my $value=$subnet->option_get( $option ); |
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24
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40
|
my $long=$self->{options}->get_long( $option ); |
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24
|
100
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44
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if ( defined ( $value ) ){ |
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# handle the tftp boot stuff specially thanks to ISC DHCPD not appending |
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220
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# option to those values for some bloody unknown reason |
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4
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50
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33
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29
|
if ( |
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50
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33
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222
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($option eq 'next-server') || |
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($option eq 'tftp-server') |
|
224
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){ |
|
225
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0
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0
|
$middle=$middle.' next-server'.$value.";\n"; |
|
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}elsif( |
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227
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($option eq 'filename') || |
|
228
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($option eq 'bootfile') |
|
229
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){ |
|
230
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0
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0
|
$middle=$middle.' filename'.$value.";\n"; |
|
231
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|
}else{ |
|
232
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4
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15
|
$middle=$middle.' option '.$long.' '.$value.";\n"; |
|
233
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} |
|
234
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} |
|
235
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} |
|
236
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|
237
|
2
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|
7
|
$middle=$middle."}\n\n"; |
|
238
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|
|
} |
|
239
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|
240
|
1
|
50
|
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|
3
|
if ( ! $no_write ){ |
|
241
|
1
|
|
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|
|
2
|
my $fh; |
|
242
|
1
|
50
|
|
|
|
86
|
open( $fh, '>', $self->{output} ) or die( 'Can not open "'.$self->{output}.'" for writing output to,,, C errno='.$! ); |
|
243
|
1
|
|
|
|
|
9
|
print $fh $header.$middle.$footer; |
|
244
|
1
|
|
|
|
|
39
|
close( $fh ); |
|
245
|
|
|
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|
246
|
|
|
|
|
|
|
# 2> /dev/null used to prevent this from being noisy |
|
247
|
1
|
|
|
|
|
4822
|
my $dhcpd_bin=`/bin/sh -c 'which dhcpd 2> /dev/null'`; |
|
248
|
1
|
50
|
|
|
|
97
|
if ( $? == 0 ){ |
|
249
|
0
|
|
|
|
|
0
|
my $quoted=shell_quote( $self->{output} ); |
|
250
|
0
|
|
|
|
|
0
|
my $check=`/bin/sh -c 'dhcpd -t -cf $quoted 2> /dev/null'`; |
|
251
|
0
|
0
|
|
|
|
0
|
if ( $? != 0 ){ |
|
252
|
0
|
|
|
|
|
0
|
die('Failed to lint the output file,"'.$self->{output}.'",'); |
|
253
|
|
|
|
|
|
|
} |
|
254
|
|
|
|
|
|
|
} |
|
255
|
|
|
|
|
|
|
} |
|
256
|
|
|
|
|
|
|
|
|
257
|
1
|
|
|
|
|
66
|
return $header.$middle.$footer; |
|
258
|
|
|
|
|
|
|
} |
|
259
|
|
|
|
|
|
|
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|
260
|
|
|
|
|
|
|
=head1 TEMPLATES |
|
261
|
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|
|
|
|
|
|
|
262
|
|
|
|
|
|
|
A good base header template is as below. |
|
263
|
|
|
|
|
|
|
|
|
264
|
|
|
|
|
|
|
default-lease-time 600; |
|
265
|
|
|
|
|
|
|
max-lease-time 7200; |
|
266
|
|
|
|
|
|
|
|
|
267
|
|
|
|
|
|
|
ddns-update-style none; |
|
268
|
|
|
|
|
|
|
|
|
269
|
|
|
|
|
|
|
authoritative; |
|
270
|
|
|
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|
|
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|
271
|
|
|
|
|
|
|
option web-proxy code 252 = text; |
|
272
|
|
|
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|
|
|
|
|
273
|
|
|
|
|
|
|
log-facility local7; |
|
274
|
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|
275
|
|
|
|
|
|
|
|
|
276
|
|
|
|
|
|
|
In general the footer will be left empty. |
|
277
|
|
|
|
|
|
|
It is largely for use if you have like static hosts. |
|
278
|
|
|
|
|
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|
|
279
|
|
|
|
|
|
|
=head1 AUTHOR |
|
280
|
|
|
|
|
|
|
|
|
281
|
|
|
|
|
|
|
Zane C. Bowers-Hadley, C<< >> |
|
282
|
|
|
|
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|
|
|
|
283
|
|
|
|
|
|
|
=head1 BUGS |
|
284
|
|
|
|
|
|
|
|
|
285
|
|
|
|
|
|
|
Please report any bugs or feature requests to C, or through |
|
286
|
|
|
|
|
|
|
the web interface at L. I will be notified, and then you'll |
|
287
|
|
|
|
|
|
|
automatically be notified of progress on your bug as I make changes. |
|
288
|
|
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|
289
|
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|
|
290
|
|
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|
|
291
|
|
|
|
|
|
|
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|
292
|
|
|
|
|
|
|
=head1 SUPPORT |
|
293
|
|
|
|
|
|
|
|
|
294
|
|
|
|
|
|
|
You can find documentation for this module with the perldoc command. |
|
295
|
|
|
|
|
|
|
|
|
296
|
|
|
|
|
|
|
perldoc Net::DHCP::Config::Utilities |
|
297
|
|
|
|
|
|
|
|
|
298
|
|
|
|
|
|
|
|
|
299
|
|
|
|
|
|
|
You can also look for information at: |
|
300
|
|
|
|
|
|
|
|
|
301
|
|
|
|
|
|
|
=over 4 |
|
302
|
|
|
|
|
|
|
|
|
303
|
|
|
|
|
|
|
=item * RT: CPAN's request tracker (report bugs here) |
|
304
|
|
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|
|
|
305
|
|
|
|
|
|
|
L |
|
306
|
|
|
|
|
|
|
|
|
307
|
|
|
|
|
|
|
=item * AnnoCPAN: Annotated CPAN documentation |
|
308
|
|
|
|
|
|
|
|
|
309
|
|
|
|
|
|
|
L |
|
310
|
|
|
|
|
|
|
|
|
311
|
|
|
|
|
|
|
=item * CPAN Ratings |
|
312
|
|
|
|
|
|
|
|
|
313
|
|
|
|
|
|
|
L |
|
314
|
|
|
|
|
|
|
|
|
315
|
|
|
|
|
|
|
=item * Search CPAN |
|
316
|
|
|
|
|
|
|
|
|
317
|
|
|
|
|
|
|
L |
|
318
|
|
|
|
|
|
|
|
|
319
|
|
|
|
|
|
|
=back |
|
320
|
|
|
|
|
|
|
|
|
321
|
|
|
|
|
|
|
|
|
322
|
|
|
|
|
|
|
=head1 ACKNOWLEDGEMENTS |
|
323
|
|
|
|
|
|
|
|
|
324
|
|
|
|
|
|
|
|
|
325
|
|
|
|
|
|
|
=head1 LICENSE AND COPYRIGHT |
|
326
|
|
|
|
|
|
|
|
|
327
|
|
|
|
|
|
|
This software is Copyright (c) 2019 by Zane C. Bowers-Hadley. |
|
328
|
|
|
|
|
|
|
|
|
329
|
|
|
|
|
|
|
This is free software, licensed under: |
|
330
|
|
|
|
|
|
|
|
|
331
|
|
|
|
|
|
|
The Artistic License 2.0 (GPL Compatible) |
|
332
|
|
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|
|
|
|
|
|
333
|
|
|
|
|
|
|
|
|
334
|
|
|
|
|
|
|
=cut |
|
335
|
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
1; # End of Net::DHCP::Config::Utilities |