--- lib/PXElator/dhcpd.pm	2009/08/03 19:59:08	128
+++ lib/PXElator/dhcpd.pm	2009/10/02 10:23:32	449
@@ -18,12 +18,14 @@
 use IO::Socket::INET;
 use File::Slurp;
 use Data::Dump qw/dump/;
-use Net::Ping;
 
 use lib '..';
 use Net::DHCP::Packet;
 use Net::DHCP::Constants 0.67;
 
+use CouchDB;
+use format;
+
 use server;
 my $debug = server::debug;
 
@@ -35,46 +37,41 @@
 
 warn "server ip $server::ip range: $server::ip_from - $server::ip_to\n";
 
-my $addr = $server::ip_from;
-
-sub client_ip {
-	my ( $mac ) = @_;
+use client;
 
-	my $conf = "$server::base_dir/conf/$server::ip";
-	mkdir $conf unless -e $conf;
+sub client_mac_ip {
+	my ( $mac, $request_ip ) = @_;
 
-	if ( -e "$conf/mac/$mac" ) {
-		my $ip = read_file "$conf/mac/$mac";
-		print "RENEW $mac $ip\n";
-		return $ip;
+	if ( ! $mac ) {
+		warn "W: no mac in requiest\n";
+		return;
 	}
 
-	mkdir $_ foreach grep { ! -e $_ } map { "$conf/$_" } ( 'ip', 'mac' );
-
-	my $p = Net::Ping->new;
+	my $conf = $server::conf;
+	mkdir $conf unless -e $conf;
 
-	my $prefix = $server::ip;
-	$prefix =~ s{\.\d+$}{.};
-	my $ip = $prefix . $addr;
-	while ( -e "conf/ip/$ip" || $p->ping( $ip ) ) {
-		$ip = $prefix . $addr++;
-		die "all addresses allocated!" if $addr == $server::ip_to;
-	}
+	my $ip;
 
-	write_file "$conf/mac/$mac", $ip;
-	if ( -l "$conf/ip/$ip" && readlink "$conf/ip/$ip" ne "$conf/mac/$mac") {
-		unlink     "$conf/ip/$ip";
-		symlink    "$conf/mac/$mac", "$conf/ip/$ip";
-		warn "$mac IP changed to $ip";
+	if ( $ip = client::ip_from_mac( $mac ) ) {
+		print "RENEW $mac $ip\n";
+		client::save_ip_mac( $ip, $mac );
+		return $ip;
+	} elsif ( ip::in_dhcp_range( $request_ip ) || $request_ip eq '0.0.0.0' ) {
+		$ip = client::next_ip( $mac );
+		print "NEW $mac $ip\n";
+	} else {
+		$ip = $request_ip;
+		client::save_ip_mac( $ip, $mac );
+		warn "W: $ip out of server range $server::ip/$server::netmask\n";
 	}
 
-	print "$mac NEW $ip\n";
-
 	return $ip;
 }
 
 use log;
 use config;
+use pxelinux;
+use client;
 
 our $file;
 our $transaction = 0; # FIXME predictible transaction numbers
@@ -82,8 +79,6 @@
 sub process_packet {
 	my $sock = shift;
 
-	server->refresh;
-
 	my $buf;
 	$sock->recv($buf, 1024);
 	my $size = 'empty';
@@ -93,12 +88,24 @@
 	return unless $buf;
 
 	my $dhcp = Net::DHCP::Packet->new($buf);
-	$dhcp->comment( $transaction++ );
 
 	warn "recv: ", $dhcp->toString if $debug;
 
-	my $mac = substr($dhcp->chaddr(),0,$dhcp->hlen()*2);
-	my $ip = client_ip($mac);
+	$dhcp->comment( $transaction++ );
+
+	my $mac = format::mac( substr($dhcp->chaddr(),0,$dhcp->hlen()*2) );
+	my $ip = client_mac_ip($mac, $dhcp->ciaddr);
+
+	my $hostname = $dhcp->getOptionValue(DHO_HOST_NAME);
+	print "$ip ", client::conf( $ip => 'hostname', default => $hostname ), " >> /etc/hosts\n" if $hostname;
+
+	my $audit = { mac => $mac, ip => $ip, hostname => $hostname,
+		options => {
+			map {
+				( $_ => $dhcp->getOptionValue( $_ ) )
+			} @{ $dhcp->{options_order} }
+		},
+	};
 
 =for later
 
@@ -125,58 +132,103 @@
 		Giaddr	=> $dhcp->giaddr(),
 		Chaddr	=> $dhcp->chaddr(),
 		File	=> $file,
+		DHO_DHCP_SERVER_IDENTIFIER()	=> $server::ip,	# busybox/udhcpc needs it but doesn't request
+	};
 
-		DHO_PXELINUX_MAGIC()       => 0xF100747E,
-		DHO_PXELINUX_CONFIG_FILE() => 'pxelinux.cfg/default',
-		DHO_PXELINUX_PATH_PREFIX() => 'live-helper/tftpboot/',
-		DHO_PXELINUX_REBOOT_TIME() => 5, # default: 300 s
+	my $options = {
+		DHO_SUBNET_MASK()	=> $server::netmask,
+		DHO_ROUTERS()		=> $server::ip,
+		DHO_DOMAIN_NAME()	=> $server::domain,
+		DHO_NAME_SERVERS()	=> $server::ip,
+		DHO_DOMAIN_NAME_SERVERS() => $server::ip,
+		DHO_HOST_NAME()		=> client::conf( $ip, 'hostname' ),
+		DHO_BROADCAST_ADDRESS() => $server::bcast,
+#		DHO_NTP_SERVERS() => '',
 	};
 
+	my @requested = split(/\s/, $dhcp->getOptionValue(DHO_DHCP_PARAMETER_REQUEST_LIST));
+	warn "options ",dump( $options ), ' requested: ',dump( @requested ) if $debug;
+
+	my @missing;
+	foreach ( @requested ) {
+		if ( defined $options->{$_} ) {
+			$packet->{$_} = $options->{$_};
+		} else {
+			push @missing, $_;
+		}
+	}
+
+	warn "W: options requested but missing: ",dump( @missing ),$/;
+	$audit->{requested} = [ @requested ];
+	$audit->{missing}   = [ @missing   ];
+
+	foreach my $opt ( 'magic', 'config_file', 'path_prefix', 'reboot_time' ) {
+		my $DH0 = eval 'DHO_PXELINUX_' . uc $opt;
+		warn "DH0: $@" if $@;
+		my $v = eval "\$pxelinux::$opt";
+		warn "v: $@" if $@;
+		next unless defined $v;
+		warn "pxelinux dhcp option $opt = $DH0 = $v\n" if $debug;
+		$packet->{ $DH0 } = $v;
+	}
+
 	my $messagetype = $dhcp->getOptionValue(DHO_DHCP_MESSAGE_TYPE());
 
+	my @type;
+
 	if ($messagetype eq DHCPDISCOVER()) {
-		log::mac $mac, "DHCP DISCOVER";
 		$packet->{Comment} = $dhcp->comment();
 		$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPOFFER();
+		@type = qw( discover offer );
 	} elsif ($messagetype eq DHCPREQUEST()) {
-		my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS());
-		log::mac $mac, "DHCP REQUEST $requested_ip $ip $file";
+		@type = qw( request );
+		my $requested_ip = $dhcp->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()) || $dhcp->ciaddr();
 		if ( $ip eq $requested_ip ) {
 			$packet->{DHO_DHCP_MESSAGE_TYPE()}      = DHCPACK();
 			$packet->{DHO_DHCP_LEASE_TIME()}        = 5 * 60; # 5 min
-#			$packet->{DHO_DHCP_SERVER_IDENTIFIER()} = $server::ip;		# FIXME
-			$packet->{DHO_SUBNET_MASK()}            = '255.255.255.0';
-			$packet->{DHO_ROUTERS()}                = $server::ip;
-#			$packet->{DHO_DOMAIN_NAME()}            = 'pxelator.lan';
-#			$packet->{DHO_NAME_SERVERS()}           = $server::ip;
 #			$packet->{DHO_ROOT_PATH()}              = '/exports/foobar';
+			$type[1] = 'ack';
 		} else {
 			$packet->{DHO_DHCP_MESSAGE_TYPE()} = DHCPNAK();
-			$packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip";
+			$packet->{DHO_DHCP_MESSAGE()} = "Bad request, expected $ip got $requested_ip";
+			$type[1] = 'nak';
 		}
 	} elsif ($messagetype eq DHCPINFORM()) {
-		log::mac $mac, "DHCP INFORM ignored";
+		@type = qw( inform ignored );
 	} else {
-		log::mac $mac, "$messagetype igored (bootp?)";
+		@type = ( $messagetype, 'ignored' );
 	}
 
-	warn ">> $mac == $ip server: $server::ip", $file ? " file: $file\n" : "\n" if $debug;
+	warn "# type ",dump @type;
+	$audit->{type} = [ @type ];
+
+	$audit->{response} = $packet;
 
 	$packet = new Net::DHCP::Packet( %$packet );
 	warn "send ",$packet->toString() if $debug;
 
-	my $reply = IO::Socket::INET->new(
-		LocalAddr => $server::ip,
-		LocalPort => 67,
-		Proto => "udp",
-		Broadcast => 1,
-		PeerAddr => '255.255.255.255',
-		PeerPort => 68,
-		Reuse => 1,
-	) or die "socket: $@";
+	if ( ip::in_dhcp_range( $ip ) ) {
+		my $buff = $packet->serialize();
+
+		my $reply = IO::Socket::INET->new(
+			LocalAddr => $server::ip,
+			LocalPort => 67,
+			Proto => "udp",
+			Broadcast => 1,
+#			PeerAddr => '255.255.255.255',
+			PeerAddr => $server::bcast,
+			PeerPort => 68,
+			Reuse => 1,
+		) or die "socket: $@";
 
-	my $buff = $packet->serialize();
-	$reply->send( $buff, 0 ) or die "Error sending: $!\n";
+		$reply->send( $buff, 0 ) or die "Error sending: $!\n";
+		warn ">> $mac == $ip server: $server::ip", $file ? " file: $file\n" : "\n";
+	} else {
+		$audit->{error} = "$ip not in server range $server::ip $server::netmask - no packet sent";
+		warn $audit->{error};
+	}
+
+	CouchDB::audit( @type, $audit );
 
 #	system("arp -s $ip $mac"),
 
@@ -198,7 +250,10 @@
 
 	print "DHCP listen on ",$sock->sockhost,":",$sock->sockport,"\n";
 
+	CouchDB::audit( 'start', { addr => $sock->sockhost, port => $sock->sockport } );
+
 	while (1) {
+		server->refresh;
 		process_packet $sock;
 	}
 }