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#!/usr/bin/perl |
package dhcpd; |
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=head1 dhcpd |
=head1 dhcpd |
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use Net::DHCP::Constants 0.67; |
use Net::DHCP::Constants 0.67; |
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use server; |
use server; |
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my $debug = server::debug; |
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my $debug = 1; |
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our ( $file, $gpxe_file ); |
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our ( $ip_from, $ip_to ) = ( 10, 100 ); |
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if ( ! $server::ip ) { |
if ( ! $server::ip ) { |
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my $server_ip = `/sbin/ifconfig`; |
my $server_ip = `/sbin/ifconfig`; |
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$server::ip = $server_ip; |
$server::ip = $server_ip; |
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} |
} |
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warn "server ip $server::ip\n"; |
warn "server ip $server::ip range: $server::ip_from - $server::ip_to\n"; |
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my $addr = $ip_from; |
my $addr = $server::ip_from; |
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sub client_ip { |
sub client_ip { |
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my ( $mac ) = @_; |
my ( $mac ) = @_; |
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my $conf = "conf/$server::ip"; |
my $conf = "$server::base_dir/conf/$server::ip"; |
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mkdir $conf unless -e $conf; |
mkdir $conf unless -e $conf; |
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if ( -e "$conf/mac/$mac" ) { |
if ( -e "$conf/mac/$mac" ) { |
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my $ip = read_file "$conf/mac/$mac"; |
my $ip = read_file "$conf/mac/$mac"; |
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print "$mac old $ip\n"; |
print "RENEW $mac $ip\n"; |
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return $ip; |
return $ip; |
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} |
} |
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my $ip = $prefix . $addr; |
my $ip = $prefix . $addr; |
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while ( -e "conf/ip/$ip" || $p->ping( $ip ) ) { |
while ( -e "conf/ip/$ip" || $p->ping( $ip ) ) { |
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$ip = $prefix . $addr++; |
$ip = $prefix . $addr++; |
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die "all addresses allocated!" if $addr == $ip_to; |
die "all addresses allocated!" if $addr == $server::ip_to; |
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} |
} |
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write_file "$conf/mac/$mac", $ip; |
write_file "$conf/mac/$mac", $ip; |
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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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our $file; |
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our $transaction = 0; # FIXME predictible transaction numbers |
our $transaction = 0; # FIXME predictible transaction numbers |
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sub process_packet { |
sub process_packet { |
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my $size = 'empty'; |
my $size = 'empty'; |
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$size = length($buf) . ' bytes' if defined $buf; |
$size = length($buf) . ' bytes' if defined $buf; |
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print "packet from ",$sock->peerhost,":",$sock->peerport," $size\n"; |
print "packet from ",$sock->peerhost,":",$sock->peerport," $size\n" if $debug; |
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return unless $buf; |
return unless $buf; |
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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++ ); |
$dhcp->comment( $transaction++ ); |
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warn "recv: ", $dhcp->toString; |
warn "recv: ", $dhcp->toString if $debug; |
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my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2); |
my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2); |
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my $ip = client_ip($mac); |
my $ip = client_ip($mac); |
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=cut |
=cut |
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config::for_ip( $ip ); |
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my $packet = { |
my $packet = { |
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Op => BOOTREPLY(), |
Op => BOOTREPLY(), |
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Hops => $dhcp->hops(), |
Hops => $dhcp->hops(), |
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Giaddr => $dhcp->giaddr(), |
Giaddr => $dhcp->giaddr(), |
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Chaddr => $dhcp->chaddr(), |
Chaddr => $dhcp->chaddr(), |
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File => $file, |
File => $file, |
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DHO_PXELINUX_MAGIC() => 0xF100747E, |
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DHO_PXELINUX_CONFIG_FILE() => 'pxelinux.cfg/default', |
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DHO_PXELINUX_PATH_PREFIX() => 'live-helper/tftpboot/', |
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DHO_PXELINUX_REBOOT_TIME() => 5, # default: 300 s |
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}; |
}; |
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my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
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if ($messagetype eq DHCPDISCOVER()) { |
if ($messagetype eq DHCPDISCOVER()) { |
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warn "DHCP DISCOVER"; |
log::mac $mac, "DHCP DISCOVER"; |
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$packet->{Comment} = $dhcp->comment(); |
$packet->{Comment} = $dhcp->comment(); |
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$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER(); |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER(); |
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} elsif ($messagetype eq DHCPREQUEST()) { |
} elsif ($messagetype eq DHCPREQUEST()) { |
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my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
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warn "DHCP REQUEST $requested_ip"; |
log::mac $mac, "DHCP REQUEST $requested_ip $ip $file"; |
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if ( $ip eq $requested_ip ) { |
if ( $ip eq $requested_ip ) { |
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$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPACK(); |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPACK(); |
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$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_MESSAGE()} = "Bad request, expected $ip"; |
$packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip"; |
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} |
} |
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} elsif ($messagetype eq DHCPINFORM()) { |
} elsif ($messagetype eq DHCPINFORM()) { |
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warn "DHCP INFORM ignored"; |
log::mac $mac, "DHCP INFORM ignored"; |
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} else { |
} else { |
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warn "$messagetype igored (bootp?)"; |
log::mac $mac, "$messagetype igored (bootp?)"; |
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} |
} |
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warn ">> $mac == $ip server: $server::ip", $file ? " file: $file\n" : "\n"; |
warn ">> $mac == $ip server: $server::ip", $file ? " file: $file\n" : "\n" if $debug; |
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$packet = new Net::DHCP::Packet( %$packet ); |
$packet = new Net::DHCP::Packet( %$packet ); |
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warn "## ",$packet->toString(),"\n" if $debug; |
warn "send ",$packet->toString() if $debug; |
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my $reply = IO::Socket::INET->new( |
my $reply = IO::Socket::INET->new( |
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LocalAddr => $server::ip, |
LocalAddr => $server::ip, |
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} |
} |
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} |
} |
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warn "loaded"; |
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1; |
1; |