PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use Data::Dumper;
   6 use PVE::Tools;
   7 use PVE::QemuServer;
   8
   9
  10 my $rule_format = "%-15s %-15s %-15s %-15s %-15s %-15s\n";
  11
  12 my $generate_input_rule = sub {
  13     my ($zoneinfo, $rule, $net, $netid) = @_;
  14
  15     die "not implemented" if $rule->{source} ne 'any';
  16     die "not implemented" if $rule->{dest} ne 'any';
  17
  18     my $zone = $net->{zone} || die "internal error";
  19     my $zid = $zoneinfo->{$zone}->{id} || die "internal error";
  20     my $tap = $net->{tap} || die "internal error";
  21
  22     return sprintf($rule_format, $rule->{action}, $rule->{source}, "$zid:$tap",
  23                    $rule->{proto} || '-', $rule->{dport} || '-', $rule->{sport} || '-');
  24 };
  25
  26 my $generate_output_rule = sub {
  27     my ($zoneinfo, $rule, $net, $netid) = @_;
  28
  29     die "not implemented" if $rule->{source} ne 'any';
  30     die "not implemented" if $rule->{dest} ne 'any';
  31
  32     my $zone = $net->{zone} || die "internal error";
  33     my $zid = $zoneinfo->{$zone}->{id} || die "internal error";
  34     my $tap = $net->{tap} || die "internal error";
  35
  36     return sprintf($rule_format, $rule->{action}, "$zid:$tap", $rule->{dest},
  37                    $rule->{proto} || '-', $rule->{dport} || '-', $rule->{sport} || '-');
  38 };
  39
  40 # we need complete VM configuration of all VMs (openvz/qemu)
  41 # in vmdata
  42
  43 sub compile {
  44     my ($targetdir, $vmdata, $rules) = @_;
  45
  46     # remove existing data ?
  47     foreach my $file (qw(zones rules interfaces  maclist  policy)) {
  48         unlink "$targetdir/$file";
  49     }
  50
  51     my $netinfo;
  52
  53     my $zoneinfo = {
  54         fw => { type => 'firewall' },
  55     };
  56
  57     my $maclist = {};
  58
  59     my $register_bridge;
  60
  61     $register_bridge = sub {
  62         my ($bridge, $vlan) = @_;
  63
  64         my $zone =  'z' . $bridge;
  65
  66         return $zone if $zoneinfo->{$zone};
  67
  68         $zoneinfo->{$zone} = {
  69             type => 'bridge',
  70             bridge => $bridge,
  71         };
  72
  73         return &$register_bridge("${bridge}v${vlan}") if defined($vlan);
  74
  75         return $zone;
  76     };
  77
  78     my $register_bridge_port = sub {
  79         my ($bridge, $vlan, $vmzone, $tap) = @_;
  80
  81         my $bridge_zone = &$register_bridge($bridge, $vlan);
  82         my $zone = $bridge_zone . $vmzone;
  83
  84         if (!$zoneinfo->{$zone}) {
  85             $zoneinfo->{$zone} = {
  86                 type => 'bport',
  87                 bridge_zone => $bridge_zone,
  88                 ifaces => {},
  89             };
  90         }
  91
  92         $zoneinfo->{$zone}->{ifaces}->{$tap} = 1;
  93
  94         return $zone;
  95     };
  96
  97     foreach my $vmid (keys %{$vmdata->{qemu}}) {
  98         $netinfo->{$vmid} = {};
  99         my $conf = $vmdata->{qemu}->{$vmid};
 100         foreach my $opt (keys %$conf) {
 101             next if $opt !~ m/^net(\d+)$/;
 102             my $netnum = $1;
 103             my $net = PVE::QemuServer::parse_net($conf->{$opt});
 104             next if !$net;
 105             die "implement me" if !$net->{bridge};
 106
 107             my $vmzone = $conf->{zone} || "vm$vmid";
 108             $net->{tap} = "tap${vmid}i${netnum}";
 109             $maclist->{$net->{tap}} = $net->{macaddr} || die "internal error";
 110             $net->{zone} = &$register_bridge_port($net->{bridge}, $net->{tag}, $vmzone, $net->{tap});
 111             $netinfo->{$vmid}->{$opt} = $net;
 112         }
 113     }
 114
 115     #print Dumper($netinfo);
 116
 117     # NOTE: zone names have length limit, so we need to
 118     # translate them into shorter names
 119
 120     my $zoneid = 0;
 121     my $zonemap = { fw => 'fw' };
 122
 123     my $lookup_zonename = sub {
 124         my ($zone) = @_;
 125
 126         return $zonemap->{$zone} if defined($zonemap->{$zone});
 127         $zonemap->{$zone} = 'z' . $zoneid++;
 128
 129         return $zonemap->{$zone};
 130     };
 131
 132     foreach my $z (sort keys %$zoneinfo) {
 133         $zoneinfo->{$z}->{id} = &$lookup_zonename($z);
 134     }
 135
 136     # dump zone file
 137
 138     my $out;
 139
 140     my $format = "%-15s %-10s %-15s %s\n";
 141     $out = sprintf($format, '#ZONE', 'TYPE', 'OPTIONS', '');
 142
 143     foreach my $z (sort keys %$zoneinfo) {
 144         my $zid = $zoneinfo->{$z}->{id};
 145         if ($zoneinfo->{$z}->{type} eq 'firewall') {
 146             $out .= sprintf($format, $zid, $zoneinfo->{$z}->{type}, '' , "# $z");
 147         } elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
 148             $out .= sprintf($format, $zid, 'ipv4', '', "# $z");
 149         } elsif ($zoneinfo->{$z}->{type} eq 'bport') {
 150             my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
 151             my $bzid = $zoneinfo->{$bridge_zone}->{id} || die "internal error";
 152             $out .= sprintf($format, "$zid:$bzid", 'bport', '', "# $z");
 153         } else {
 154             die "internal error";
 155         }
 156     }
 157
 158     $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
 159
 160     PVE::Tools::file_set_contents("$targetdir/zones", $out);
 161
 162     # dump interfaces
 163
 164     $format = "%-15s %-20s %-10s %-15s %s\n";
 165     $out = sprintf($format, '#ZONE', 'INTERFACE', 'BROADCAST', 'OPTIONS', '');
 166
 167     my $maclist_format = "%-15s %-15s %-15s\n";
 168     my $macs = sprintf($maclist_format, '#DISPOSITION', 'INTERFACE', 'MACZONE');
 169
 170     foreach my $z (sort keys %$zoneinfo) {
 171         my $zid = $zoneinfo->{$z}->{id};
 172         if ($zoneinfo->{$z}->{type} eq 'firewall') {
 173             # do nothing;
 174         } elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
 175             my $bridge = $zoneinfo->{$z}->{bridge} || die "internal error";
 176             $out .= sprintf($format, $zid, $bridge, 'detect', 'bridge,optional', "# $z");
 177
 178         } elsif ($zoneinfo->{$z}->{type} eq 'bport') {
 179             my $ifaces = $zoneinfo->{$z}->{ifaces};
 180             foreach my $iface (sort keys %$ifaces) {
 181                 my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
 182                 my $bridge = $zoneinfo->{$bridge_zone}->{bridge} || die "internal error";
 183                 my $iftxt = "$bridge:$iface";
 184                 $out .= sprintf($format, $zid, $iftxt, '-', 'maclist', "# $z");
 185                 $macs .= sprintf($maclist_format, 'ACCEPT', $iface, $maclist->{$iface});
 186             }
 187         } else {
 188             die "internal error";
 189         }
 190     }
 191
 192     $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
 193
 194     PVE::Tools::file_set_contents("$targetdir/interfaces", $out);
 195
 196     # dump maclist
 197     PVE::Tools::file_set_contents("$targetdir/maclist", $macs);
 198
 199     # dump policy
 200
 201     $format = "%-15s %-15s %-15s %s\n";
 202     $out = sprintf($format, '#SOURCE', 'DEST', 'POLICY', 'LOG');
 203     #$out .= sprintf($format, 'fw', 'all', 'ACCEPT', '');
 204     $out .= sprintf($format, 'all', 'all', 'REJECT', 'info');
 205
 206     PVE::Tools::file_set_contents("$targetdir/policy", $out);
 207
 208     # dump rules
 209     $out = '';
 210
 211     $out = sprintf($rule_format, '#ACTION', 'SOURCE', 'DEST', 'PROTO', 'DPORT', 'SPORT');
 212     foreach my $vmid (sort keys %$rules) {
 213         if (my $inrules = $rules->{$vmid}->{in}) {
 214             foreach my $rule (@$inrules) {
 215                 foreach my $netid (keys %{$netinfo->{$vmid}}) {
 216                     my $net = $netinfo->{$vmid}->{$netid};
 217                     next if !($rule->{iface} eq 'any' || $rule->{iface} eq $netid);
 218                     $out .= &$generate_input_rule($zoneinfo, $rule, $net, $netid);
 219                 }
 220             }
 221         }
 222
 223         if (my $outrules = $rules->{$vmid}->{out}) {
 224             foreach my $rule (@$outrules) {
 225                 foreach my $netid (keys %{$netinfo->{$vmid}}) {
 226                     my $net = $netinfo->{$vmid}->{$netid};
 227                     next if !($rule->{iface} eq 'any' || $rule->{iface} eq $netid);
 228                     $out .= &$generate_output_rule($zoneinfo, $rule, $net, $netid);
 229                 }
 230             }
 231         }
 232     }
 233
 234     PVE::Tools::file_set_contents("$targetdir/rules", $out);
 235
 236 }
 237
 238
 239 sub activate {
 240
 241 }
 242
 243
 244 1;