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     my $netinfo;
  47
  48     my $zoneinfo = {
  49         fw => { type => 'firewall' },
  50     };
  51
  52     my $register_bridge;
  53
  54     $register_bridge = sub {
  55         my ($bridge, $vlan) = @_;
  56
  57         my $zone =  'z' . $bridge;
  58
  59         return $zone if $zoneinfo->{$zone};
  60
  61         $zoneinfo->{$zone} = {
  62             type => 'bridge',
  63             bridge => $bridge,
  64         };
  65
  66         return &$register_bridge("${bridge}v${vlan}") if defined($vlan);
  67
  68         return $zone;
  69     };
  70
  71     my $register_bridge_port = sub {
  72         my ($bridge, $vlan, $vmzone, $tap) = @_;
  73
  74         my $bridge_zone = &$register_bridge($bridge, $vlan);
  75         my $zone = $bridge_zone . $vmzone;
  76
  77         if (!$zoneinfo->{$zone}) {
  78             $zoneinfo->{$zone} = {
  79                 type => 'bport',
  80                 bridge_zone => $bridge_zone,
  81                 ifaces => {},
  82             };
  83         }
  84
  85         $zoneinfo->{$zone}->{ifaces}->{$tap} = 1;
  86
  87         return $zone;
  88     };
  89
  90     foreach my $vmid (keys %{$vmdata->{qemu}}) {
  91         $netinfo->{$vmid} = {};
  92         my $conf = $vmdata->{qemu}->{$vmid};
  93         foreach my $opt (keys %$conf) {
  94             next if $opt !~ m/^net(\d+)$/;
  95             my $netnum = $1;
  96             my $net = PVE::QemuServer::parse_net($conf->{$opt});
  97             next if !$net;
  98             die "implement me" if !$net->{bridge};
  99
 100             my $vmzone = $conf->{zone} || "vm$vmid";
 101             $net->{tap} = "tap${vmid}i${netnum}";
 102             $net->{zone} = &$register_bridge_port($net->{bridge}, $net->{tag}, $vmzone, $net->{tap});
 103             $netinfo->{$vmid}->{$opt} = $net;
 104         }
 105     }
 106
 107     #print Dumper($netinfo);
 108
 109     # NOTE: zone names have length limit, so we need to
 110     # translate them into shorter names
 111
 112     my $zoneid = 0;
 113     my $zonemap = { fw => 'fw' };
 114
 115     my $lookup_zonename = sub {
 116         my ($zone) = @_;
 117
 118         return $zonemap->{$zone} if defined($zonemap->{$zone});
 119         $zonemap->{$zone} = 'z' . $zoneid++;
 120
 121         return $zonemap->{$zone};
 122     };
 123
 124     foreach my $z (sort keys %$zoneinfo) {
 125         $zoneinfo->{$z}->{id} = &$lookup_zonename($z);
 126     }
 127
 128     # dump zone file
 129
 130     my $out;
 131
 132     my $format = "%-15s %-10s %-15s %s\n";
 133     $out = sprintf($format, '#ZONE', 'TYPE', 'OPTIONS', '');
 134
 135     foreach my $z (sort keys %$zoneinfo) {
 136         my $zid = $zoneinfo->{$z}->{id};
 137         if ($zoneinfo->{$z}->{type} eq 'firewall') {
 138             $out .= sprintf($format, $zid, $zoneinfo->{$z}->{type}, '' , "# $z");
 139         } elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
 140             $out .= sprintf($format, $zid, 'ipv4', '', "# $z");
 141         } elsif ($zoneinfo->{$z}->{type} eq 'bport') {
 142             my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
 143             my $bzid = $zoneinfo->{$bridge_zone}->{id} || die "internal error";
 144             $out .= sprintf($format, "$zid:$bzid", 'bport', '', "# $z");
 145         } else {
 146             die "internal error";
 147         }
 148     }
 149
 150     $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
 151
 152     PVE::Tools::file_set_contents("$targetdir/zones", $out);
 153
 154     # dump interfaces
 155
 156     $format = "%-15s %-20s %-10s %-15s %s\n";
 157     $out = sprintf($format, '#ZONE', 'INTERFACE', 'BROADCAST', 'OPTIONS', '');
 158
 159     foreach my $z (sort keys %$zoneinfo) {
 160         my $zid = $zoneinfo->{$z}->{id};
 161         if ($zoneinfo->{$z}->{type} eq 'firewall') {
 162             # do nothing;
 163         } elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
 164             my $bridge = $zoneinfo->{$z}->{bridge} || die "internal error";
 165             $out .= sprintf($format, $zid, $bridge, 'detect', 'bridge', "# $z");
 166
 167         } elsif ($zoneinfo->{$z}->{type} eq 'bport') {
 168             my $ifaces = $zoneinfo->{$z}->{ifaces};
 169             foreach my $iface (sort keys %$ifaces) {
 170                 my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
 171                 my $bridge = $zoneinfo->{$bridge_zone}->{bridge} || die "internal error";
 172                 my $iftxt = "$bridge:$iface";
 173                 $out .= sprintf($format, $zid, $iftxt, '', '', "# $z");
 174             }
 175         } else {
 176             die "internal error";
 177         }
 178     }
 179
 180     $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
 181
 182     PVE::Tools::file_set_contents("$targetdir/interfaces", $out);
 183
 184     # dump policy
 185
 186     $format = "%-15s %-15s %-15s %s\n";
 187     $out = sprintf($format, '#SOURCE', 'DEST', 'POLICY', 'LOG');
 188     $out .= sprintf($format, 'all', 'all', 'REJECT', 'info');
 189
 190     PVE::Tools::file_set_contents("$targetdir/policy", $out);
 191
 192     # dump rules
 193     $out = '';
 194
 195     $out = sprintf($rule_format, '#ACTION', 'SOURCE', 'DEST', 'PROTO', 'DPORT', 'SPORT');
 196     foreach my $vmid (sort keys %$rules) {
 197         if (my $inrules = $rules->{$vmid}->{in}) {
 198             foreach my $rule (@$inrules) {
 199                 foreach my $netid (keys %{$netinfo->{$vmid}}) {
 200                     my $net = $netinfo->{$vmid}->{$netid};
 201                     next if !($rule->{iface} eq 'any' || $rule->{iface} eq $netid);
 202                     $out .= &$generate_input_rule($zoneinfo, $rule, $net, $netid);
 203                 }
 204             }
 205         }
 206
 207         if (my $outrules = $rules->{$vmid}->{out}) {
 208             foreach my $rule (@$outrules) {
 209                 foreach my $netid (keys %{$netinfo->{$vmid}}) {
 210                     my $net = $netinfo->{$vmid}->{$netid};
 211                     next if !($rule->{iface} eq 'any' || $rule->{iface} eq $netid);
 212                     $out .= &$generate_output_rule($zoneinfo, $rule, $net, $netid);
 213                 }
 214             }
 215         }
 216     }
 217
 218     PVE::Tools::file_set_contents("$targetdir/rules", $out);
 219
 220 }
 221
 222
 223 sub activate {
 224
 225 }
 226
 227
 228 1;