8 |
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; |
17 |
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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19 |
my $debug = shift @ARGV; |
my $debug = shift @ARGV; |
77 |
return $ip; |
return $ip; |
78 |
} |
} |
79 |
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80 |
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my $transaction = 0; # FIXME predictible transaction numbers |
81 |
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82 |
while (1) { |
while (1) { |
83 |
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84 |
require "config.pl"; # refresh config |
require "config.pl"; # refresh config |
91 |
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92 |
if (defined $buf) { |
if (defined $buf) { |
93 |
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94 |
my $dhcp; |
my $dhcp = Net::DHCP::Packet->new($buf); |
95 |
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$dhcp->comment( $transaction++ ); |
96 |
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97 |
eval { $dhcp = Net::DHCP::Packet->new($buf); }; |
warn "recv: ", $dhcp->toString, "\n\n"; |
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die "can't use request", dump( $buf ) if $@; |
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if ( $debug ) { |
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warn "recv: ", $dhcp->toString, "\n\n"; |
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} |
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98 |
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99 |
my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2); |
my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2); |
100 |
my $ip = client_ip($mac); |
my $ip = client_ip($mac); |
106 |
$file = 'undionly.kpxe'; |
$file = 'undionly.kpxe'; |
107 |
} |
} |
108 |
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109 |
my $packet = new Net::DHCP::Packet( |
my $packet = { |
110 |
Op => BOOTREPLY(), |
Op => BOOTREPLY(), |
111 |
Hops => $dhcp->hops(), |
Hops => $dhcp->hops(), |
112 |
Xid => $dhcp->xid(), |
Xid => $dhcp->xid(), |
118 |
Chaddr => $dhcp->chaddr(), |
Chaddr => $dhcp->chaddr(), |
119 |
File => $file, |
File => $file, |
120 |
# DHO_DHCP_MESSAGE_TYPE() => DHCPACK(), |
# DHO_DHCP_MESSAGE_TYPE() => DHCPACK(), |
121 |
DHO_SUBNET_MASK() => '255.0.0.0', |
# DHO_SUBNET_MASK() => '255.255.255.0', |
122 |
); |
}; |
123 |
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124 |
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my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
125 |
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126 |
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if ($messagetype eq DHCPDISCOVER()) { |
127 |
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warn "DHCP DISCOVER"; |
128 |
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$packet->{Comment} = $dhcp->comment(); |
129 |
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$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER(); |
130 |
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} elsif ($messagetype eq DHCPREQUEST()) { |
131 |
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my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
132 |
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warn "DHCP REQUEST $requested_ip"; |
133 |
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if ( $ip eq $requested_ip ) { |
134 |
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$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPACK(); |
135 |
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$packet->{DHO_DHCP_LEASE_TIME()} = 100; |
136 |
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} else { |
137 |
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$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPNAK(); |
138 |
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$packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip"; |
139 |
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} |
140 |
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} elsif ($messagetype eq DHCPINFORM()) { |
141 |
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warn "DHCP INFORM ignored"; |
142 |
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} else { |
143 |
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warn "$messagetype igored (bootp?)"; |
144 |
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} |
145 |
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146 |
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147 |
warn ">> $mac == $ip server: $server_ip file: $file\n"; |
warn ">> $mac == $ip server: $server_ip", $file ? " file: $file\n" : "\n"; |
148 |
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149 |
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$packet = new Net::DHCP::Packet( %$packet ); |
150 |
warn "## ",$packet->toString(),"\n" if $debug; |
warn "## ",$packet->toString(),"\n" if $debug; |
151 |
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152 |
my $reply = IO::Socket::INET->new( |
my $reply = IO::Socket::INET->new( |