+my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
+
+# todo: define more MACROS
+# inspired by: /usr/share/shorewall/macro.*
+my $pve_fw_macros = {
+ BitTorrent => [
+ { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
+ { action => 'PARAM', proto => 'udp', dport => '6881' }
+ ],
+ HTTP => [
+ { action => 'PARAM', proto => 'tcp', dport => '80' },
+ ],
+ HTTPS => [
+ { action => 'PARAM', proto => 'tcp', dport => '443' },
+ ],
+};
+
+my $pve_fw_parsed_macros;
+my $pve_fw_preferred_macro_names = {};
+
+sub get_firewall_macros {
+
+ return $pve_fw_parsed_macros if $pve_fw_parsed_macros;
+
+ $pve_fw_parsed_macros = {};
+
+ foreach my $k (keys %$pve_fw_macros) {
+ my $name = lc($k);
+
+ my $macro = $pve_fw_macros->{$k};
+ $pve_fw_preferred_macro_names->{$name} = $k;
+ $pve_fw_parsed_macros->{$name} = $macro;
+ }
+
+ return $pve_fw_parsed_macros;
+}
+
+my $etc_services;
+
+sub get_etc_services {
+
+ return $etc_services if $etc_services;
+
+ my $filename = "/etc/services";
+
+ my $fh = IO::File->new($filename, O_RDONLY);
+ if (!$fh) {
+ warn "unable to read '$filename' - $!\n";
+ return {};
+ }
+
+ my $services = {};
+
+ while (my $line = <$fh>) {
+ chomp ($line);
+ next if $line =~m/^#/;
+ next if ($line =~m/^\s*$/);
+
+ if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
+ $services->{byid}->{$2}->{name} = $1;
+ $services->{byid}->{$2}->{$3} = 1;
+ $services->{byname}->{$1} = $services->{byid}->{$2};
+ }
+ }
+
+ close($fh);
+
+ $etc_services = $services;
+
+
+ return $etc_services;
+}
+
+my $etc_protocols;
+
+sub get_etc_protocols {
+ return $etc_protocols if $etc_protocols;
+
+ my $filename = "/etc/protocols";
+
+ my $fh = IO::File->new($filename, O_RDONLY);
+ if (!$fh) {
+ warn "unable to read '$filename' - $!\n";
+ return {};
+ }
+
+ my $protocols = {};
+
+ while (my $line = <$fh>) {
+ chomp ($line);
+ next if $line =~m/^#/;
+ next if ($line =~m/^\s*$/);
+
+ if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
+ $protocols->{byid}->{$2}->{name} = $1;
+ $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
+ }
+ }
+
+ close($fh);
+
+ $etc_protocols = $protocols;
+
+ return $etc_protocols;
+}
+
+sub parse_address_list {
+ my ($str) = @_;
+
+ my $nbaor = 0;
+ foreach my $aor (split(/,/, $str)) {
+ if (!Net::IP->new($aor)) {
+ my $err = Net::IP::Error();
+ die "invalid IP address: $err\n";
+ }else{
+ $nbaor++;
+ }
+ }
+ return $nbaor;
+}
+
+sub parse_port_name_number_or_range {
+ my ($str) = @_;
+
+ my $services = PVE::Firewall::get_etc_services();
+ my $nbports = 0;
+ foreach my $item (split(/,/, $str)) {
+ my $portlist = "";
+ foreach my $pon (split(':', $item, 2)) {
+ if ($pon =~ m/^\d+$/){
+ die "invalid port '$pon'\n" if $pon < 0 && $pon > 65536;
+ }else{
+ die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
+ }
+ $nbports++;
+ }
+ }
+
+ return ($nbports);
+}
+
+my $bridge_firewall_enabled = 0;
+
+sub enable_bridge_firewall {
+
+ return if $bridge_firewall_enabled; # only once
+
+ system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables");
+ system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables");
+
+ $bridge_firewall_enabled = 1;
+}
+
+my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
+
+sub iptables {
+ my ($cmd) = @_;
+
+ run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
+}
+
+sub iptables_restore_cmdlist {
+ my ($cmdlist) = @_;
+
+ run_command("/sbin/iptables-restore -n", input => $cmdlist);
+}
+
+sub iptables_get_chains {
+
+ my $res = {};
+
+ # check what chains we want to track
+ my $is_pvefw_chain = sub {
+ my $name = shift;
+
+ return 1 if $name =~ m/^PVEFW-\S+$/;
+
+ return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
+ return 1 if $name =~ m/^vmbr\d+-(:?IN|OUT)$/;
+ return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
+
+ return undef;
+ };
+
+ my $table = '';
+
+ my $parser = sub {
+ my $line = shift;
+
+ return if $line =~ m/^#/;
+ return if $line =~ m/^\s*$/;
+
+ if ($line =~ m/^\*(\S+)$/) {
+ $table = $1;
+ return;
+ }
+
+ return if $table ne 'filter';
+
+ if ($line =~ m/^:(\S+)\s/) {
+ my $chain = $1;
+ return if !&$is_pvefw_chain($chain);
+ $res->{$chain} = "unknown";
+ } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
+ my ($chain, $sig) = ($1, $2);
+ return if !&$is_pvefw_chain($chain);
+ $res->{$chain} = $sig;
+ } else {
+ # simply ignore the rest
+ return;
+ }
+ };
+
+ run_command("/sbin/iptables-save", outfunc => $parser);
+
+ return $res;
+}
+
+sub iptables_chain_exist {
+ my ($chain) = @_;
+
+ eval{
+ iptables("-n --list $chain");
+ };
+ return undef if $@;
+
+ return 1;
+}
+
+sub iptables_rule_exist {
+ my ($rule) = @_;
+
+ eval{
+ iptables("-C $rule");
+ };
+ return undef if $@;
+
+ return 1;
+}
+
+sub ruleset_generate_rule {
+ my ($ruleset, $chain, $rule, $goto) = @_;
+
+ my $cmd = '';
+
+ $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
+ $cmd .= " -s $rule->{source}" if $rule->{source};
+ $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
+ $cmd .= " -d $rule->{dest}" if $rule->{destination};
+ $cmd .= " -p $rule->{proto}" if $rule->{proto};
+ $cmd .= " --match multiport" if $rule->{nbdport} && $rule->{nbdport} > 1;
+ $cmd .= " --dport $rule->{dport}" if $rule->{dport};
+ $cmd .= " --match multiport" if $rule->{nbsport} && $rule->{nbsport} > 1;
+ $cmd .= " --sport $rule->{sport}" if $rule->{sport};
+
+ if (my $action = $rule->{action}) {
+ $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
+ $cmd .= $goto ? " -g $action" : " -j $action";
+ };
+
+ ruleset_addrule($ruleset, $chain, $cmd) if $cmd;
+}
+
+sub ruleset_create_chain {
+ my ($ruleset, $chain) = @_;
+
+ die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
+
+ die "chain '$chain' already exists\n" if $ruleset->{$chain};
+
+ $ruleset->{$chain} = [];
+}
+
+sub ruleset_chain_exist {
+ my ($ruleset, $chain) = @_;
+
+ return $ruleset->{$chain} ? 1 : undef;
+}
+
+sub ruleset_addrule {
+ my ($ruleset, $chain, $rule) = @_;
+
+ die "no such chain '$chain'\n" if !$ruleset->{$chain};
+
+ push @{$ruleset->{$chain}}, "-A $chain $rule";
+}
+
+sub ruleset_insertrule {
+ my ($ruleset, $chain, $rule) = @_;
+
+ die "no such chain '$chain'\n" if !$ruleset->{$chain};
+
+ unshift @{$ruleset->{$chain}}, "-A $chain $rule";
+}
+
+sub generate_bridge_chains {
+ my ($ruleset, $bridge) = @_;
+
+ if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-IN")){
+ ruleset_create_chain($ruleset, "PVEFW-BRIDGE-IN");
+ }
+
+ if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-OUT")){
+ ruleset_create_chain($ruleset, "PVEFW-BRIDGE-OUT");
+ }
+
+ if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){
+ ruleset_create_chain($ruleset, "PVEFW-FORWARD");
+
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m state --state RELATED,ESTABLISHED -j ACCEPT");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-in --physdev-is-bridged -j PVEFW-BRIDGE-OUT");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-out --physdev-is-bridged -j PVEFW-BRIDGE-IN");
+ }
+
+ if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
+ ruleset_create_chain($ruleset, "$bridge-IN");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing
+ ruleset_addrule($ruleset, "PVEFW-BRIDGE-IN", "-j $bridge-IN");
+ ruleset_addrule($ruleset, "$bridge-IN", "-j ACCEPT");
+ }
+
+ if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
+ ruleset_create_chain($ruleset, "$bridge-OUT");
+ ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing
+ ruleset_addrule($ruleset, "PVEFW-BRIDGE-OUT", "-j $bridge-OUT");
+ }
+}
+
+sub generate_tap_rules_direction {
+ my ($ruleset, $group_rules, $iface, $netid, $macaddr, $rules, $bridge, $direction) = @_;
+
+ my $tapchain = "$iface-$direction";
+
+ ruleset_create_chain($ruleset, $tapchain);
+
+ ruleset_addrule($ruleset, $tapchain, "-m state --state INVALID -j DROP");
+ ruleset_addrule($ruleset, $tapchain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
+
+ if ($direction eq 'OUT' && defined($macaddr)) {
+ ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP");
+ }
+
+ if ($rules) {
+ foreach my $rule (@$rules) {
+ next if $rule->{iface} && $rule->{iface} ne $netid;
+ # we go to $bridge-IN if accept in out rules
+ if($rule->{action} =~ m/^(GROUP-(\S+))$/){
+ $rule->{action} .= "-$direction";
+ # generate empty group rule if don't exist
+ if(!ruleset_chain_exist($ruleset, $rule->{action})){
+ generate_group_rules($ruleset, $group_rules, $2);
+ }
+ ruleset_generate_rule($ruleset, $tapchain, $rule);
+ ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -g $bridge-IN")
+ if $direction eq 'OUT';
+ } else {
+ $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
+ ruleset_generate_rule($ruleset, $tapchain, $rule);
+ }
+ }
+ }
+
+ ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
+ ruleset_addrule($ruleset, $tapchain, "-j DROP");
+
+ # plug the tap chain to bridge chain
+ my $physdevdirection = $direction eq 'IN' ? "out" : "in";
+ my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
+ ruleset_insertrule($ruleset, "$bridge-$direction", $rule);
+
+ if ($direction eq 'OUT'){
+ # add tap->host rules
+ my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain";
+ ruleset_addrule($ruleset, "PVEFW-INPUT", $rule);
+ }
+}
+
+sub enablehostfw {
+ my ($ruleset, $rules, $group_rules) = @_;
+
+ # fixme: allow security groups
+
+ # host inbound firewall
+ my $chain = "PVEFW-HOST-IN";
+ ruleset_create_chain($ruleset, $chain);
+
+ ruleset_addrule($ruleset, $chain, "-m state --state INVALID -j DROP");
+ ruleset_addrule($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT");
+ ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
+ ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
+ ruleset_addrule($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
+ ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
+
+ if ($rules->{in}) {
+ foreach my $rule (@{$rules->{in}}) {
+ # we use RETURN because we need to check also tap rules
+ $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
+ ruleset_generate_rule($ruleset, $chain, $rule);
+ }
+ }
+
+ ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
+ ruleset_addrule($ruleset, $chain, "-j DROP");