/[pxelator]/lib/PXElator/dhcpd.pm
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 45 by dpavlin, Wed Jul 29 22:04:58 2009 UTC revision 118 by dpavlin, Mon Aug 3 08:52:32 2009 UTC
# Line 1  Line 1 
1  #!/usr/bin/perl  package dhcpd;
2    
3  =head1 dhcpd  =head1 dhcpd
4    
# Line 19  use IO::Socket::INET; Line 19  use IO::Socket::INET;
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`;
# Line 36  if ( ! $server::ip ) { Line 33  if ( ! $server::ip ) {
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    
# Line 76  sub client_ip { Line 73  sub client_ip {
73          return $ip;          return $ip;
74  }  }
75    
76    use log;
77    use config;
78    
79    our $file;
80  our $transaction = 0; # FIXME predictible transaction numbers  our $transaction = 0; # FIXME predictible transaction numbers
81    
82  sub process_packet {  sub process_packet {
# Line 86  sub process_packet { Line 87  sub process_packet {
87          my $size = 'empty';          my $size = 'empty';
88          $size = length($buf) . ' bytes' if defined $buf;          $size = length($buf) . ' bytes' if defined $buf;
89    
90          print "packet from ",$sock->peerhost,":",$sock->peerport," $size\n";          print "packet from ",$sock->peerhost,":",$sock->peerport," $size\n" if $debug;
91          return unless $buf;          return unless $buf;
92    
93          my $dhcp = Net::DHCP::Packet->new($buf);          my $dhcp = Net::DHCP::Packet->new($buf);
94          $dhcp->comment( $transaction++ );          $dhcp->comment( $transaction++ );
95    
96          warn "recv: ", $dhcp->toString;          warn "recv: ", $dhcp->toString if $debug;
97    
98          my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2);          my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2);
99          my $ip = client_ip($mac);          my $ip = client_ip($mac);
# Line 109  sub process_packet { Line 110  sub process_packet {
110    
111  =cut  =cut
112    
113            config::for_ip( $ip );
114    
115          my $packet = {          my $packet = {
116                  Op              => BOOTREPLY(),                  Op              => BOOTREPLY(),
117                  Hops    => $dhcp->hops(),                  Hops    => $dhcp->hops(),
# Line 119  sub process_packet { Line 122  sub process_packet {
122                  Siaddr  => $server::ip,                  Siaddr  => $server::ip,
123                  Giaddr  => $dhcp->giaddr(),                  Giaddr  => $dhcp->giaddr(),
124                  Chaddr  => $dhcp->chaddr(),                  Chaddr  => $dhcp->chaddr(),
125                  File    => $pxe::file,                  File    => $file,
126    
127                    DHO_PXELINUX_MAGIC()       => 0xF100747E,
128                    DHO_PXELINUX_CONFIG_FILE() => 'pxelinux.cfg/default',
129                    DHO_PXELINUX_PATH_PREFIX() => 'live-helper/tftpboot/',
130                    DHO_PXELINUX_REBOOT_TIME() => 5, # default: 300 s
131          };          };
132    
133          my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE());          my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE());
134    
135          if ($messagetype eq DHCPDISCOVER()) {          if ($messagetype eq DHCPDISCOVER()) {
136                  warn "DHCP DISCOVER";                  log::mac $mac, "DHCP DISCOVER";
137                  $packet->{Comment} = $dhcp->comment();                  $packet->{Comment} = $dhcp->comment();
138                  $packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER();                  $packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER();
139          } elsif ($messagetype eq DHCPREQUEST()) {          } elsif ($messagetype eq DHCPREQUEST()) {
140                  my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS());                  my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS());
141                  warn "DHCP REQUEST $requested_ip";                  log::mac $mac, "DHCP REQUEST $requested_ip $ip $file";
142                  if ( $ip eq $requested_ip ) {                  if ( $ip eq $requested_ip ) {
143                          $packet->{DHO_DHCP_MESSAGE_TYPE()}      = DHCPACK();                          $packet->{DHO_DHCP_MESSAGE_TYPE()}      = DHCPACK();
144                          $packet->{DHO_DHCP_LEASE_TIME()}        = 5 * 60; # 5 min                          $packet->{DHO_DHCP_LEASE_TIME()}        = 5 * 60; # 5 min
# Line 145  sub process_packet { Line 153  sub process_packet {
153                          $packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip";                          $packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip";
154                  }                  }
155          } elsif ($messagetype eq DHCPINFORM()) {          } elsif ($messagetype eq DHCPINFORM()) {
156                  warn "DHCP INFORM ignored";                  log::mac $mac, "DHCP INFORM ignored";
157          } else {          } else {
158                  warn "$messagetype igored (bootp?)";                  log::mac $mac, "$messagetype igored (bootp?)";
159          }          }
160    
161          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;
162    
163          $packet = new Net::DHCP::Packet( %$packet );          $packet = new Net::DHCP::Packet( %$packet );
164          warn "## ",$packet->toString(),"\n" if $debug;          warn "send ",$packet->toString() if $debug;
165    
166          my $reply = IO::Socket::INET->new(          my $reply = IO::Socket::INET->new(
167                  LocalAddr => $server::ip,                  LocalAddr => $server::ip,
# Line 189  sub start { Line 197  sub start {
197          print "DHCP listen on ",$sock->sockhost,":",$sock->sockport,"\n";          print "DHCP listen on ",$sock->sockhost,":",$sock->sockport,"\n";
198    
199          while (1) {          while (1) {
                 Module::Refresh->refresh;  
200                  process_packet $sock;                  process_packet $sock;
201          }          }
202  }  }
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