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use autodie; |
use autodie; |
9 |
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10 |
use IO::Socket::INET; |
use IO::Socket::INET; |
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use Net::DHCP::Packet; |
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use Net::DHCP::Constants; |
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11 |
use File::Slurp; |
use File::Slurp; |
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use Data::Dump qw/dump/; |
use Data::Dump qw/dump/; |
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14 |
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use lib 'lib'; |
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use Net::DHCP::Packet; |
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use Net::DHCP::Constants 0.67; |
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die "need to run $0 as root like this\nsudo $0\n" unless $< == 0; |
die "need to run $0 as root like this\nsudo $0\n" unless $< == 0; |
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my $debug = shift @ARGV; |
my $debug = shift @ARGV; |
69 |
} |
} |
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71 |
write_file "$conf/mac/$mac", $ip; |
write_file "$conf/mac/$mac", $ip; |
72 |
unlink "$conf/ip/$ip" if -e "$conf/ip/$ip"; |
if ( -l "$conf/ip/$ip" && readlink "$conf/ip/$ip" ne "$conf/mac/$mac") { |
73 |
symlink "$conf/mac/$mac", "$conf/ip/$ip"; |
unlink "$conf/ip/$ip"; |
74 |
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symlink "$conf/mac/$mac", "$conf/ip/$ip"; |
75 |
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warn "$mac IP changed to $ip"; |
76 |
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} |
77 |
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78 |
print "$mac NEW $ip\n"; |
print "$mac NEW $ip\n"; |
79 |
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80 |
return $ip; |
return $ip; |
81 |
} |
} |
82 |
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83 |
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my $transaction = 0; # FIXME predictible transaction numbers |
84 |
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85 |
while (1) { |
while (1) { |
86 |
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87 |
require "config.pl"; # refresh config |
require "config.pl"; # refresh config |
94 |
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95 |
if (defined $buf) { |
if (defined $buf) { |
96 |
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97 |
my $dhcp; |
my $dhcp = Net::DHCP::Packet->new($buf); |
98 |
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$dhcp->comment( $transaction++ ); |
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eval { $dhcp = Net::DHCP::Packet->new($buf); }; |
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die "can't use request", dump( $buf ) if $@; |
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99 |
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100 |
if ( $debug ) { |
warn "recv: ", $dhcp->toString, "\n\n"; |
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warn "recv: ", $dhcp->toString, "\n\n"; |
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} |
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101 |
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102 |
my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2); |
my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2); |
103 |
my $ip = client_ip($mac); |
my $ip = client_ip($mac); |
109 |
$file = 'undionly.kpxe'; |
$file = 'undionly.kpxe'; |
110 |
} |
} |
111 |
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112 |
my $packet = new Net::DHCP::Packet( |
my $packet = { |
113 |
Op => BOOTREPLY(), |
Op => BOOTREPLY(), |
114 |
Hops => $dhcp->hops(), |
Hops => $dhcp->hops(), |
115 |
Xid => $dhcp->xid(), |
Xid => $dhcp->xid(), |
121 |
Chaddr => $dhcp->chaddr(), |
Chaddr => $dhcp->chaddr(), |
122 |
File => $file, |
File => $file, |
123 |
# DHO_DHCP_MESSAGE_TYPE() => DHCPACK(), |
# DHO_DHCP_MESSAGE_TYPE() => DHCPACK(), |
124 |
DHO_SUBNET_MASK() => '255.0.0.0', |
# DHO_SUBNET_MASK() => '255.255.255.0', |
125 |
); |
}; |
126 |
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127 |
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my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
128 |
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129 |
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if ($messagetype eq DHCPDISCOVER()) { |
130 |
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warn "DHCP DISCOVER"; |
131 |
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$packet->{Comment} = $dhcp->comment(); |
132 |
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$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER(); |
133 |
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} elsif ($messagetype eq DHCPREQUEST()) { |
134 |
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my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
135 |
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warn "DHCP REQUEST $requested_ip"; |
136 |
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if ( $ip eq $requested_ip ) { |
137 |
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$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPACK(); |
138 |
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$packet->{DHO_DHCP_LEASE_TIME()} = 100; |
139 |
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} else { |
140 |
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$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPNAK(); |
141 |
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$packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip"; |
142 |
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} |
143 |
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} elsif ($messagetype eq DHCPINFORM()) { |
144 |
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warn "DHCP INFORM ignored"; |
145 |
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} else { |
146 |
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warn "$messagetype igored (bootp?)"; |
147 |
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} |
148 |
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149 |
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150 |
warn ">> $mac == $ip server: $server_ip file: $file\n"; |
warn ">> $mac == $ip server: $server_ip", $file ? " file: $file\n" : "\n"; |
151 |
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152 |
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$packet = new Net::DHCP::Packet( %$packet ); |
153 |
warn "## ",$packet->toString(),"\n" if $debug; |
warn "## ",$packet->toString(),"\n" if $debug; |
154 |
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155 |
my $reply = IO::Socket::INET->new( |
my $reply = IO::Socket::INET->new( |