1 |
#!/usr/bin/perl |
package dhcpd; |
2 |
|
|
3 |
=head1 dhcpd |
=head1 dhcpd |
4 |
|
|
19 |
use File::Slurp; |
use File::Slurp; |
20 |
use Data::Dump qw/dump/; |
use Data::Dump qw/dump/; |
21 |
use Net::Ping; |
use Net::Ping; |
|
use Module::Refresh; |
|
22 |
|
|
23 |
use lib '..'; |
use lib '..'; |
24 |
use Net::DHCP::Packet; |
use Net::DHCP::Packet; |
25 |
use Net::DHCP::Constants 0.67; |
use Net::DHCP::Constants 0.67; |
26 |
|
|
27 |
use server; |
use server; |
28 |
use pxe; |
my $debug = server::debug; |
|
|
|
|
my $debug = 1; |
|
29 |
|
|
30 |
if ( ! $server::ip ) { |
if ( ! $server::ip ) { |
31 |
my $server_ip = `/sbin/ifconfig`; |
my $server_ip = `/sbin/ifconfig`; |
33 |
$server::ip = $server_ip; |
$server::ip = $server_ip; |
34 |
} |
} |
35 |
|
|
36 |
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"; |
37 |
|
|
38 |
my $addr = $server::ip_from; |
my $addr = $server::ip_from; |
39 |
|
|
40 |
sub client_ip { |
sub client_ip { |
41 |
my ( $mac ) = @_; |
my ( $mac ) = @_; |
42 |
|
|
43 |
my $conf = "conf/$server::ip"; |
my $conf = "$server::base_dir/conf/$server::ip"; |
44 |
mkdir $conf unless -e $conf; |
mkdir $conf unless -e $conf; |
45 |
|
|
46 |
if ( -e "$conf/mac/$mac" ) { |
if ( -e "$conf/mac/$mac" ) { |
47 |
my $ip = read_file "$conf/mac/$mac"; |
my $ip = read_file "$conf/mac/$mac"; |
48 |
print "$mac old $ip\n"; |
print "RENEW $mac $ip\n"; |
49 |
return $ip; |
return $ip; |
50 |
} |
} |
51 |
|
|
73 |
return $ip; |
return $ip; |
74 |
} |
} |
75 |
|
|
76 |
|
use log; |
77 |
|
use config; |
78 |
|
use pxelinux; |
79 |
|
|
80 |
|
our $file; |
81 |
our $transaction = 0; # FIXME predictible transaction numbers |
our $transaction = 0; # FIXME predictible transaction numbers |
82 |
|
|
83 |
sub process_packet { |
sub process_packet { |
84 |
my $sock = shift; |
my $sock = shift; |
85 |
|
|
86 |
|
server->refresh; |
87 |
|
|
88 |
my $buf; |
my $buf; |
89 |
$sock->recv($buf, 1024); |
$sock->recv($buf, 1024); |
90 |
my $size = 'empty'; |
my $size = 'empty'; |
91 |
$size = length($buf) . ' bytes' if defined $buf; |
$size = length($buf) . ' bytes' if defined $buf; |
92 |
|
|
93 |
print "packet from ",$sock->peerhost,":",$sock->peerport," $size\n"; |
print "packet from ",$sock->peerhost,":",$sock->peerport," $size\n" if $debug; |
94 |
return unless $buf; |
return unless $buf; |
95 |
|
|
96 |
my $dhcp = Net::DHCP::Packet->new($buf); |
my $dhcp = Net::DHCP::Packet->new($buf); |
97 |
$dhcp->comment( $transaction++ ); |
$dhcp->comment( $transaction++ ); |
98 |
|
|
99 |
warn "recv: ", $dhcp->toString; |
warn "recv: ", $dhcp->toString if $debug; |
100 |
|
|
101 |
my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2); |
my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2); |
102 |
my $ip = client_ip($mac); |
my $ip = client_ip($mac); |
113 |
|
|
114 |
=cut |
=cut |
115 |
|
|
116 |
|
config::for_ip( $ip ); |
117 |
|
|
118 |
my $packet = { |
my $packet = { |
119 |
Op => BOOTREPLY(), |
Op => BOOTREPLY(), |
120 |
Hops => $dhcp->hops(), |
Hops => $dhcp->hops(), |
125 |
Siaddr => $server::ip, |
Siaddr => $server::ip, |
126 |
Giaddr => $dhcp->giaddr(), |
Giaddr => $dhcp->giaddr(), |
127 |
Chaddr => $dhcp->chaddr(), |
Chaddr => $dhcp->chaddr(), |
128 |
File => $pxe::file, |
File => $file, |
129 |
}; |
}; |
130 |
|
|
131 |
|
foreach my $opt ( 'magic', 'config_file', 'path_prefix', 'reboot_time' ) { |
132 |
|
my $DH0 = eval 'DHO_PXELINUX_' . uc $opt; |
133 |
|
warn "DH0: $@" if $@; |
134 |
|
my $v = eval "\$pxelinux::$opt"; |
135 |
|
warn "v: $@" if $@; |
136 |
|
next unless defined $v; |
137 |
|
warn "pxelinux dhcp option $opt = $DH0 = $v"; |
138 |
|
$packet->{ $DH0 } = $v; |
139 |
|
} |
140 |
|
|
141 |
my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
142 |
|
|
143 |
if ($messagetype eq DHCPDISCOVER()) { |
if ($messagetype eq DHCPDISCOVER()) { |
144 |
warn "DHCP DISCOVER"; |
log::mac $mac, "DHCP DISCOVER"; |
145 |
$packet->{Comment} = $dhcp->comment(); |
$packet->{Comment} = $dhcp->comment(); |
146 |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER(); |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER(); |
147 |
} elsif ($messagetype eq DHCPREQUEST()) { |
} elsif ($messagetype eq DHCPREQUEST()) { |
148 |
my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
149 |
warn "DHCP REQUEST $requested_ip"; |
log::mac $mac, "DHCP REQUEST $requested_ip $ip $file"; |
150 |
if ( $ip eq $requested_ip ) { |
if ( $ip eq $requested_ip ) { |
151 |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPACK(); |
$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPACK(); |
152 |
$packet->{DHO_DHCP_LEASE_TIME()} = 5 * 60; # 5 min |
$packet->{DHO_DHCP_LEASE_TIME()} = 5 * 60; # 5 min |
161 |
$packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip"; |
$packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip"; |
162 |
} |
} |
163 |
} elsif ($messagetype eq DHCPINFORM()) { |
} elsif ($messagetype eq DHCPINFORM()) { |
164 |
warn "DHCP INFORM ignored"; |
log::mac $mac, "DHCP INFORM ignored"; |
165 |
} else { |
} else { |
166 |
warn "$messagetype igored (bootp?)"; |
log::mac $mac, "$messagetype igored (bootp?)"; |
167 |
} |
} |
168 |
|
|
169 |
warn ">> $mac == $ip server: $server::ip", $pxe::file ? " pxe file: $pxe::file\n" : "\n"; |
warn ">> $mac == $ip server: $server::ip", $file ? " file: $file\n" : "\n" if $debug; |
170 |
|
|
171 |
|
warn "## created packet ", dump( $packet ); |
172 |
|
|
173 |
$packet = new Net::DHCP::Packet( %$packet ); |
$packet = new Net::DHCP::Packet( %$packet ); |
174 |
warn "## ",$packet->toString(),"\n" if $debug; |
warn "send ",$packet->toString() if $debug; |
175 |
|
|
176 |
my $reply = IO::Socket::INET->new( |
my $reply = IO::Socket::INET->new( |
177 |
LocalAddr => $server::ip, |
LocalAddr => $server::ip, |
207 |
print "DHCP listen on ",$sock->sockhost,":",$sock->sockport,"\n"; |
print "DHCP listen on ",$sock->sockhost,":",$sock->sockport,"\n"; |
208 |
|
|
209 |
while (1) { |
while (1) { |
|
Module::Refresh->refresh; |
|
210 |
process_packet $sock; |
process_packet $sock; |
211 |
} |
} |
212 |
} |
} |