#!/usr/bin/perl -w
#
# Copyright 2005 Stichting Wireless Leiden
# maart 2004 rick@wirelessleiden.nl
#

# Config located at other file
my $conf_file="./genesis.conf";
do($conf_file) || die("Cann't open $conf_file");
################ END OF CONFIG ##########################

#variablen
my $time=gmtime();
my $source=`/bin/hostname`;
chomp($source);


#slurp IP berekeningen info
do ("$IP_pmPath") || die ("Cann't open $IP_pmPath");
#slurp dns info
do ("$dnsheader_confPath") || die ("Cann't open $dnsheader_confPath");


#zoek uit of het master_ip addr voorkomt in de configs
#belangrijk van aliassen
sub master_ipNotUsed {
  if( $debug ) {
    print "running master_ipNotUsed...\n";
  }
  foreach my $if (keys %config) {
    if( $IP{$if} =~ /([0-9\.]+).*/ ) {
      if( $1 eq $master_ip ) {
        return(0);
      };
    };
  };
  return(1);
};



sub genHeader {
  my $comment = $_[0];
  my $output =
  "$comment This file specific to wireless\n" .
  "$comment leiden. Please make all changes in Genesis.\n" .
  "$comment\n" .
  "$comment Generated by $source\n" .
  "$comment on $time\n" .
  "$comment\n" .
  "$comment  $author\n" .
  "$comment\n\n\n";
  return ($output);
};


sub txtconfig {
  my $output = "";
  foreach $interface (keys %config) {
    $output .= $config{$interface};
  };
  return($output);
};


sub dnsmasq_conf {
  my $output = genHeader("#");
  $output .=
    "# Query all upstream dns servers by default\n" .
    "all-servers \n" .
    "# DHCP server options \n" .
    "dhcp-authoritative \n" .
    "dhcp-fqdn \n" .
    "domain=dhcp.$nodename.$domain. \n" .
    "bogus-priv \n" .
    "domain-needed \n" .
    "expand-hosts \n" .
    "\n" .
    "# Low memory footprint \n" .
    "cache-size=10000 \n" .
    "\n";

  foreach my $interface (sort keys %config) {
    if( $interface =~ /^[a-z]+[0-9]+$/i ) {
      (my $ip, my $netmask) = split('/', $IP{$interface});
      my $subnet = IP::toSubnet($netmask);
      
      $output .=
      "## $interface $DESC{$interface}\n";
      
      if ( $DHCP{$interface} =~ /[0-9]+\-[0-9]+/i ) {
        my $dhcp_part = $ip;
        $dhcp_part =~ s/[0-9]+$//;
        (my $dhcp_start, my $dhcp_stop) = $DHCP{$interface} =~ /([0-9]+)\-([0-9]+)/i;
        $dhcp_start = $dhcp_part . $dhcp_start;
        $dhcp_stop = $dhcp_part . $dhcp_stop;
        $output .= "dhcp-range=$interface,$dhcp_start,$dhcp_stop,$subnet,24h\n\n";
      }
      else {
       $output .= "# not autoritive \n\n";
      };
    };
  };
  
  return($output);
};


sub dhcpd_conf {
  my $output = genHeader("#");
  $output .=
  "option domain-name \"$domain\";\n" .
  " \n" .
  "default-lease-time 7200;\n" .
  "max-lease-time 2592000;\n" .
  "\n" .
  "ddns-update-style none;\n" .
  "\n" .
  "# Hack for the WET11\n" .
  "#\n" .
  "always-broadcast on;\n" .
  "\n" .
  "option domain-name-servers ${master_ip};\n" .
  "\n";

  foreach my $interface (sort keys %config) {
    if( $interface =~ /^[a-z]+[0-9]+$/i ) {
      (my $ip, my $netmask) = split('/', $IP{$interface});
      my $subnet = IP::toSubnet($netmask);
      my $broadcast = IP::getBroadcastAddr($ip, $subnet);
      my $network = IP::getNetworkAddr($ip, $subnet);
      
      $output .=
      "# $interface $DESC{$interface}\n";
      
      if ( $DHCP{$interface} =~ /[0-9]+\-[0-9]+/i ) {
        my $dhcp_part = $ip;
        $dhcp_part =~ s/[0-9]+$//;
        (my $dhcp_start, my $dhcp_stop) = $DHCP{$interface} =~ /([0-9]+)\-([0-9]+)/i;
        $dhcp_start = $dhcp_part . $dhcp_start;
        $dhcp_stop = $dhcp_part . $dhcp_stop;
        $output .=
        "subnet $network netmask $subnet {\n" .
        "  range $dhcp_start $dhcp_stop;\n" .
        "  option broadcast-address $broadcast;\n" .
        "  option subnet-mask $subnet;\n" .
        "  option routers $ip;\n" .
	$DHCP_STATIC{$if} .
        "}\n" .
        "\n";
      }
      else {
       $output .=
       "subnet $network netmask $subnet {not authoritative; }\n" .
       "\n";
      };
    };
  };
  
  return($output);
};

sub named_conf {
  my $output = genHeader("#");
  $output .=
  "options {\n" .
  "  directory \"/etc/namedb\"\;\n" .
  "  pid-file \"/var/run/named/pid\"\;\n" .
  "  forwarders {\n";
  foreach my $forward (@forwarder) {
    $output .= "$forward;\n";
  };
  $output .= 
  "  };\n" .
  "};\n" .
  "\n" .
  "\n" .
  "zone \"\.\" {\n" .
  "  type hint;\n" .
  "  file \"/etc/namedb/named.root\"\;\n" .
  "}\;\n" .
  "\n" .
  "zone \"0\.0\.127\.IN-ADDR.ARPA\" {\n" .
  "  type master\;\n" .
  "  file \"/etc/namedb/master/localhost.rev\"\;\n" .
  "}\;\n" .
  "\n" .
  "zone \"1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.IP6.INT\" {\n" .
  "  type master\;\n" .
  "  file \"/etc/namedb/master/localhost-v6.rev\"\;\n" .
  "};\n" .
  "\n";


  foreach my $tmpZone (sort keys %zone) {
    my $dnsZone = $zone{$tmpZone};
    $output .= 
    "zone \"$tmpZone\" {\n" .
    "  type slave\;\n" .
    "  file \"slave/slave-$tmpZone\"\;\n" .
    "  masters {\n";
    foreach my $tmpIP (sort @$dnsZone) {
      $output .= "    $tmpIP\;\n";
    };
    $output .= 
    "  };\n" .
    "};\n" .
    "\n";
  };
  
  return($output);
};



sub rc_conf_local {
  my $output = genHeader("#");
  my $masterNotUsed = master_ipNotUsed();
  $output.=
  "hostname=\"$nodename.$domain\"\n" .
  "location=\"$location\"\n" .
  "\n";
  if( $gateway ) {
    $output .=  
    "defaultrouter='$gateway'\n"
  }
  if( $tproxy ) {
    if( $tproxy =~ m/\d+\.\d+\.\d+\.\d+\/\d+/ ) {
      $output .=
      "# Tproxy is ran on this system\n".
      "tproxy_enable='YES'\n".
      "tproxy_range='$tproxy'\n".
      "\n";
    }
    elsif( $tproxy !~ m/no/i ) {
      $output .= "# WARNING - specification propably wrong - check " .
      "genesis. It should be a pure CIDR\n";
    };
  };
  
  $output .= "ifconfig_lo0_alias0=\"inet 172.31.255.1/32\"\n";
  if( $masterNotUsed ) {
    $output .= "ifconfig_lo0_alias1=\"inet $master_ip/32\"\n\n";
  }
  else {
    $output .= "#ifconfig_lo0_alias1=\"inet $master_ip/32\"\n\n";
  };

  foreach my $interface (sort keys %config) {
    (my $if, my $number) = split(/:/, $interface);
      if( defined $number ) {
        $output .= "ifconfig_$if\_alias$number=\"inet $IP{$interface}\"\n";
      }
      else {
        if ( $DHCPCLIENT{$if} =~ /yes/i ) {
           $output .= "ifconfig_$if=\"DHCP";
        } else {
           $output .= "ifconfig_$if=\"inet $IP{$interface}";
        };
        $output .= " $CARD_OPTION{$interface}";
        if( $TYPE{$if} =~ /wireless/i ) {
          $output .= " ssid $ESSID{$interface}";
          if ( $SUBTYPE{$if} =~ /802.11a/i ) {
            $output .= " mode 11a";
          } elsif ( $SUBTYPE{$if} =~ /802.11g/i ) {
            $output .= " mode 11g";
          } else {
            # Default output
            $output .= " mode 11b";
          }

          if( $MODE{$if}=~/master/i ) {
            $output .= " channel $CHANNEL{$interface}";
            $output .= " mediaopt hostap";
          }
          else {
            $output .= "";
          };
        };
        $output .= "\"\n";
      };
  };
  $output .= "\n";
  $output .= "# XXX: Automagic by finding out which IP is in 172.16.0.0/12, perhaps?\n";
  $output .= "internalif=\"" . $internalif . "\"\n";

  $output .= "\n";
  $output .= "static_routes=\"wleiden\"\n";

  $output .= "route_wleiden=\"-net 172.16.0.0/12 $internalroute\"\n";


  if( $proxyid ) {
    # ssh-tun requires a four digit port number, so 22 + "??"
    $proxyid = sprintf("%02i", $proxyid);

    $output .= "\n";
    $output .= "sshtun_enable=\"YES\"\n";
    $output .= "sshtun_flags=\"-R 22$proxyid:localhost:22 \"\n";
  }

  if ( $nat =~ /yes/i ) {
    $output .= "\n";
    $output .= "# Firewall inbound NAT option\n";
    $output .= "firewall_enable=\"YES\"\n";
    $output .= "firewall_script=\"/etc/ipfw.sh\"\n";
    $output .= "firewall_nat_enable=\"YES\"\n";
    $output .= "gateway_enable=\"YES\"\n";

  } else {
    $output .= "\n";
    $output .= "# Disable routing\n";
    $output .= "gateway_enable=\"no\"\n";
  }   

  # Block these ip's
  if ( $firewall_block ) {
    $firewall_block=~s/\n/\ /g;
    $output .= "\n";
    $output .= "firewall_block=\"$firewall_block\"";
  }

  return($output);
};


sub resolv_conf {
  my $output = genHeader"#";

#  $output .= 
#  "search wleiden.net.\n" .
#  "# Try local (cache) first \n" .
#  "nameserver 127.0.0.1\n" .
#  "# Direct neighboors\n" .
#  "\n";
#
#  foreach my $if (sort keys %config) {
#    if( exists $POINT_TO_POINT{$if} ) {
#      foreach my $ip ($POINT_TO_POINT{$if}) {
#        $output .= "nameserver $ip # $DESC{$if}\n";
#      };
#    };
#  };
#
#  $output .=
#  "\n" .
#  "# Last resort/backup remote nameservers \n" .
#  "nameserver 172.17.8.68    # proxy1\n" .
#  "nameserver 172.17.143.4   # proxy2\n" .
#  "nameserver 172.20.128.98  # proxy3\n" .
#  "nameserver 172.16.2.254   # proxy4\n" .
#  "nameserver 172.19.168.66  # proxy5\n";

  $output .=
  "nameserver 8.8.8.8 # Google\n" .
  "nameserver 8.8.4.4 # Google\n" .
  "search wleiden.net";

  return($output);
};


sub parse_config {
  my $workingfile = $_[0];
  do($workingfile) || die("Cann't open/parse $workingfile");
  foreach my $if (keys %config) {
    my $cfg=$config{$if};
    while ($cfg) {
      $cfg=~s/^([^\n\r]+)[\r\n]*//m;
      my $line=$1;
      $line=~s/\s*#.*//;
      if (((my $name, my $value)=split(/=/,$line)) eq 2) {
        my $doit="if (exists(\$$name\{\"$if\"\})) {\$$name\{\"$if\"\}.=\";$value\";} else {\$$name\{\"$if\"\}.=\"$value\";}";
        eval($doit);
      };
      $cfg=~s/[\r\n]*$//m;
    };
  };
};

sub authorized_keys {
  my $output = genHeader("#");
  if( -e "$global_keyPath" ) {
    open( GLOBAL, "$global_keyPath" ) || die ("Cann't open $global_keyPath");
      $output .= join("", <GLOBAL>);
    close( GLOBAL );
  }
  else {
    $output .= "# No $global_keyPath\n";
  };
 
  if( -e "$ndir/$nodetype$nodename/$ssh_file" ) {
    open( NODE, "$ndir/$nodetype$nodename/$ssh_file" ) || die ("Cann't open $home/$nodename/$ssh_file");
      $output .= join("", <NODE>);
    close( NODE );
  }
  else {
    $output .= "# No $ndir/$nodetype$nodename/$ssh_file\n";
  };
  
  return($output);
};

sub do_it {
  my $file = $_[0];
  my $body = "";
  
  $file =~ s/\./_/g;
  $body=&$file;
  return($body);
};

if( exists $ARGV[0] ) {
  if( exists $ARGV[1] ) {
    parse_config($ARGV[0]);
    print do_it($ARGV[1]);
  }
  else {
    print "Usage `perl wleiden.pl 'inputfile' 'outputfile'`\n";
  };
};

1;