18 |
use IO::Socket::INET; |
use IO::Socket::INET; |
19 |
use File::Slurp; |
use File::Slurp; |
20 |
use Data::Dump qw/dump/; |
use Data::Dump qw/dump/; |
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use Net::Ping; |
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use Module::Refresh; |
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22 |
use lib '..'; |
use lib '..'; |
23 |
use Net::DHCP::Packet; |
use Net::DHCP::Packet; |
24 |
use Net::DHCP::Constants 0.67; |
use Net::DHCP::Constants 0.67; |
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26 |
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use CouchDB; |
27 |
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use format; |
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29 |
use server; |
use server; |
30 |
my $debug = server::debug; |
my $debug = server::debug; |
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use pxe; |
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31 |
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32 |
if ( ! $server::ip ) { |
if ( ! $server::ip ) { |
33 |
my $server_ip = `/sbin/ifconfig`; |
my $server_ip = `/sbin/ifconfig`; |
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$server::ip = $server_ip; |
$server::ip = $server_ip; |
36 |
} |
} |
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warn "server ip $server::ip file: $pxe::file range: $server::ip_from - $server::ip_to\n"; |
warn "server ip $server::ip range: $server::ip_from - $server::ip_to\n"; |
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my $addr = $server::ip_from; |
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sub client_ip { |
use client; |
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my ( $mac ) = @_; |
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42 |
my $conf = "$server::base_dir/conf/$server::ip"; |
sub client_mac_ip { |
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mkdir $conf unless -e $conf; |
my ( $mac, $request_ip ) = @_; |
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if ( -e "$conf/mac/$mac" ) { |
if ( ! $mac ) { |
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my $ip = read_file "$conf/mac/$mac"; |
warn "W: no mac in requiest\n"; |
47 |
print "RENEW $mac $ip\n"; |
return; |
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return $ip; |
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} |
} |
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mkdir $_ foreach grep { ! -e $_ } map { "$conf/$_" } ( 'ip', 'mac' ); |
my $conf = $server::conf; |
51 |
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mkdir $conf unless -e $conf; |
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my $p = Net::Ping->new; |
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52 |
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my $prefix = $server::ip; |
my $ip; |
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$prefix =~ s{\.\d+$}{.}; |
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my $ip = $prefix . $addr; |
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while ( -e "conf/ip/$ip" || $p->ping( $ip ) ) { |
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$ip = $prefix . $addr++; |
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die "all addresses allocated!" if $addr == $server::ip_to; |
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} |
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write_file "$conf/mac/$mac", $ip; |
if ( $ip = client::ip_from_mac( $mac ) ) { |
56 |
if ( -l "$conf/ip/$ip" && readlink "$conf/ip/$ip" ne "$conf/mac/$mac") { |
print "RENEW $mac $ip\n"; |
57 |
unlink "$conf/ip/$ip"; |
client::save_ip_mac( $ip, $mac ); |
58 |
symlink "$conf/mac/$mac", "$conf/ip/$ip"; |
return $ip; |
59 |
warn "$mac IP changed to $ip"; |
} elsif ( in_our_range( $request_ip ) ) { |
60 |
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$ip = client::next_ip( $mac ); |
61 |
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print "NEW $mac $ip\n"; |
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} else { |
63 |
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$ip = $request_ip; |
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client::save_ip_mac( $ip, $mac ); |
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warn "W: $ip our of server range $server::ip $server::netmask\n"; |
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} |
} |
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print "$mac NEW $ip\n"; |
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return $ip; |
return $ip; |
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} |
} |
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use log; |
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use config; |
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use pxelinux; |
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use client; |
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76 |
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our $file; |
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our $transaction = 0; # FIXME predictible transaction numbers |
our $transaction = 0; # FIXME predictible transaction numbers |
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79 |
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sub ip2bin { pack('C*', split(/\./, $_[0])) }; |
80 |
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sub in_our_range { |
81 |
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my $ip = shift; |
82 |
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return 1 if $ip eq '0.0.0.0'; |
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return 1 if ( |
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( ip2bin($ip) & ip2bin($server::netmask) ) |
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eq |
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( ip2bin($server::ip) & ip2bin($server::netmask) ) |
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); |
88 |
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} |
89 |
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sub process_packet { |
sub process_packet { |
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my $sock = shift; |
my $sock = shift; |
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server->refresh; |
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my $buf; |
my $buf; |
96 |
$sock->recv($buf, 1024); |
$sock->recv($buf, 1024); |
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my $size = 'empty'; |
my $size = 'empty'; |
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return unless $buf; |
return unless $buf; |
102 |
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my $dhcp = Net::DHCP::Packet->new($buf); |
my $dhcp = Net::DHCP::Packet->new($buf); |
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$dhcp->comment( $transaction++ ); |
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warn "recv: ", $dhcp->toString if $debug; |
warn "recv: ", $dhcp->toString if $debug; |
106 |
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my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2); |
$dhcp->comment( $transaction++ ); |
108 |
my $ip = client_ip($mac); |
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109 |
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my $mac = format::mac( substr($dhcp->chaddr(),0,$dhcp->hlen()*2) ); |
110 |
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my $ip = client_mac_ip($mac, $dhcp->ciaddr); |
111 |
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112 |
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my $hostname = $dhcp->getOptionValue(DHO_HOST_NAME); |
113 |
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print "$ip ", client::conf( $ip => 'hostname', default => $hostname ), " >> /etc/hosts\n" if $hostname; |
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115 |
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my $audit = { mac => $mac, ip => $ip, hostname => $hostname, |
116 |
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options => { |
117 |
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map { |
118 |
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( $_ => $dhcp->getOptionValue( $_ ) ) |
119 |
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} @{ $dhcp->{options_order} } |
120 |
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}, |
121 |
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}; |
122 |
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=for later |
=for later |
124 |
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132 |
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133 |
=cut |
=cut |
134 |
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135 |
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config::for_ip( $ip ); |
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my $packet = { |
my $packet = { |
138 |
Op => BOOTREPLY(), |
Op => BOOTREPLY(), |
139 |
Hops => $dhcp->hops(), |
Hops => $dhcp->hops(), |
144 |
Siaddr => $server::ip, |
Siaddr => $server::ip, |
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Giaddr => $dhcp->giaddr(), |
Giaddr => $dhcp->giaddr(), |
146 |
Chaddr => $dhcp->chaddr(), |
Chaddr => $dhcp->chaddr(), |
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File => $pxe::file, |
File => $file, |
148 |
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DHO_DHCP_SERVER_IDENTIFIER() => $server::ip, # busybox/udhcpc needs it but doesn't request |
149 |
}; |
}; |
150 |
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151 |
pxe::config_for_ip( $ip ); |
my $options = { |
152 |
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DHO_SUBNET_MASK() => $server::netmask, |
153 |
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DHO_ROUTERS() => $server::ip, |
154 |
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DHO_DOMAIN_NAME() => $server::domain, |
155 |
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DHO_NAME_SERVERS() => $server::ip, |
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DHO_DOMAIN_NAME_SERVERS() => $server::ip, |
157 |
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DHO_HOST_NAME() => client::conf( $ip, 'hostname' ), |
158 |
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DHO_BROADCAST_ADDRESS() => $server::bcast, |
159 |
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# DHO_NTP_SERVERS() => '', |
160 |
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}; |
161 |
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162 |
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my @requested = split(/\s/, $dhcp->getOptionValue(DHO_DHCP_PARAMETER_REQUEST_LIST)); |
163 |
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warn "options ",dump( $options ), ' requested: ',dump( @requested ) if $debug; |
164 |
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165 |
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my @missing; |
166 |
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foreach ( @requested ) { |
167 |
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if ( defined $options->{$_} ) { |
168 |
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$packet->{$_} = $options->{$_}; |
169 |
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} else { |
170 |
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push @missing, $_; |
171 |
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} |
172 |
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} |
173 |
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174 |
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warn "W: options requested but missing: ",dump( @missing ),$/; |
175 |
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$audit->{requested} = [ @requested ]; |
176 |
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$audit->{missing} = [ @missing ]; |
177 |
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178 |
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foreach my $opt ( 'magic', 'config_file', 'path_prefix', 'reboot_time' ) { |
179 |
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my $DH0 = eval 'DHO_PXELINUX_' . uc $opt; |
180 |
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warn "DH0: $@" if $@; |
181 |
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my $v = eval "\$pxelinux::$opt"; |
182 |
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warn "v: $@" if $@; |
183 |
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next unless defined $v; |
184 |
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warn "pxelinux dhcp option $opt = $DH0 = $v\n" if $debug; |
185 |
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$packet->{ $DH0 } = $v; |
186 |
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} |
187 |
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188 |
my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
189 |
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190 |
if ($messagetype eq DHCPDISCOVER()) { |
if ($messagetype eq DHCPDISCOVER()) { |
191 |
log::mac $mac, "DHCP DISCOVER"; |
$audit->{type} = 'discover'; |
192 |
$packet->{Comment} = $dhcp->comment(); |
$packet->{Comment} = $dhcp->comment(); |
193 |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER(); |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER(); |
194 |
} elsif ($messagetype eq DHCPREQUEST()) { |
} elsif ($messagetype eq DHCPREQUEST()) { |
195 |
my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
196 |
log::mac $mac, "DHCP REQUEST $requested_ip $ip $pxe::file"; |
$audit->{type} = 'request'; |
197 |
if ( $ip eq $requested_ip ) { |
if ( $ip eq $requested_ip ) { |
198 |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPACK(); |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPACK(); |
199 |
$packet->{DHO_DHCP_LEASE_TIME()} = 5 * 60; # 5 min |
$packet->{DHO_DHCP_LEASE_TIME()} = 5 * 60; # 5 min |
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# $packet->{DHO_DHCP_SERVER_IDENTIFIER()} = $server::ip; # FIXME |
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$packet->{DHO_SUBNET_MASK()} = '255.255.255.0'; |
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$packet->{DHO_ROUTERS()} = $server::ip; |
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# $packet->{DHO_DOMAIN_NAME()} = 'pxelator.lan'; |
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# $packet->{DHO_NAME_SERVERS()} = $server::ip; |
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200 |
# $packet->{DHO_ROOT_PATH()} = '/exports/foobar'; |
# $packet->{DHO_ROOT_PATH()} = '/exports/foobar'; |
201 |
} else { |
} else { |
202 |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPNAK(); |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPNAK(); |
203 |
$packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip"; |
$packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip"; |
204 |
} |
} |
205 |
} elsif ($messagetype eq DHCPINFORM()) { |
} elsif ($messagetype eq DHCPINFORM()) { |
206 |
log::mac $mac, "DHCP INFORM ignored"; |
$audit->{type} = 'inform'; |
207 |
} else { |
} else { |
208 |
log::mac $mac, "$messagetype igored (bootp?)"; |
$audit->{type} = sprintf('ignored %x', $messagetype); |
209 |
} |
} |
210 |
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211 |
warn ">> $mac == $ip server: $server::ip", $pxe::file ? " pxe file: $pxe::file\n" : "\n" if $debug; |
warn ">> $mac == $ip server: $server::ip", $file ? " file: $file\n" : "\n" if $debug; |
212 |
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$audit->{response} = $packet; |
213 |
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214 |
$packet = new Net::DHCP::Packet( %$packet ); |
$packet = new Net::DHCP::Packet( %$packet ); |
215 |
warn "send ",$packet->toString() if $debug; |
warn "send ",$packet->toString() if $debug; |
216 |
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217 |
my $reply = IO::Socket::INET->new( |
if ( in_our_range( $ip ) ) { |
218 |
LocalAddr => $server::ip, |
my $buff = $packet->serialize(); |
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LocalPort => 67, |
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Proto => "udp", |
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Broadcast => 1, |
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PeerAddr => '255.255.255.255', |
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PeerPort => 68, |
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Reuse => 1, |
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) or die "socket: $@"; |
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219 |
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220 |
my $buff = $packet->serialize(); |
my $reply = IO::Socket::INET->new( |
221 |
$reply->send( $buff, 0 ) or die "Error sending: $!\n"; |
LocalAddr => $server::ip, |
222 |
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LocalPort => 67, |
223 |
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Proto => "udp", |
224 |
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Broadcast => 1, |
225 |
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PeerAddr => '255.255.255.255', |
226 |
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PeerPort => 68, |
227 |
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Reuse => 1, |
228 |
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) or die "socket: $@"; |
229 |
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230 |
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$reply->send( $buff, 0 ) or die "Error sending: $!\n"; |
231 |
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} else { |
232 |
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$audit->{error} = "$ip our of our range $server::ip $server::netmask"; |
233 |
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} |
234 |
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235 |
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CouchDB::audit( $audit->{type}, $audit ); |
236 |
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|
237 |
# system("arp -s $ip $mac"), |
# system("arp -s $ip $mac"), |
238 |
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254 |
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255 |
print "DHCP listen on ",$sock->sockhost,":",$sock->sockport,"\n"; |
print "DHCP listen on ",$sock->sockhost,":",$sock->sockport,"\n"; |
256 |
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257 |
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CouchDB::audit( 'start', { addr => $sock->sockhost, port => $sock->sockport } ); |
258 |
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259 |
while (1) { |
while (1) { |
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Module::Refresh->refresh; |
|
260 |
process_packet $sock; |
process_packet $sock; |
261 |
} |
} |
262 |
} |
} |