run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
}
+sub ebtables_restore_cmdlist {
+ my ($cmdlist) = @_;
+
+ run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
+}
+
sub iptables_get_chains {
my ($iptablescmd) = @_;
return $res;
}
+sub ebtables_get_chains {
+
+ my $res = {};
+ my $chains = {};
+
+ my $parser = sub {
+ my $line = shift;
+ return if $line =~ m/^#/;
+ return if $line =~ m/^\s*$/;
+ if ($line =~ m/^:(\S+)\s\S+$/) {
+ # Make sure we know chains exist even if they're empty.
+ $chains->{$1} //= [];
+ } elsif ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
+ my $chain = $1;
+ $line =~ s/\s+$//;
+ push @{$chains->{$chain}}, $line;
+ } elsif ($line =~ m/^(?:\S+)\s(tap\d+i\d+-(:?IN|OUT))\s(?:\S+).*/) {
+ my $chain = $1;
+ $line =~ s/\s+$//;
+ push @{$chains->{$chain}}, $line;
+ } elsif ($line =~ m/^(?:\S+)\s(veth\d+i\d+-(:?IN|OUT))\s(?:\S+).*/) {
+ my $chain = $1;
+ $line =~ s/\s+$//;
+ push @{$chains->{$chain}}, $line;
+ } else {
+ # simply ignore the rest
+ return;
+ }
+ };
+
+ run_command("/sbin/ebtables-save", outfunc => $parser);
+
+ # compute digest for each chain
+ foreach my $chain (keys %$chains) {
+ $res->{$chain} = iptables_chain_digest($chains->{$chain});
+ }
+ return $res;
+}
+
# substitude action of rule according to action hash
sub rule_substitude_action {
my ($rule, $actions) = @_;
my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $log);
push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
}
- push @{$ruleset->{$chain}}, "-A $chain $match $action";
+ # for stable ebtables digests avoid double-spaces to match ebtables-save output
+ $match .= ' ' if length($match);
+ push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
}
sub ruleset_insertrule {
return $rule;
}
+sub verify_ethertype {
+ my ($value) = @_;
+ my $types = get_etc_ethertypes();
+ die "unknown ethernet protocol type: $value\n"
+ if !defined($types->{byname}->{$value}) &&
+ !defined($types->{byid}->{$value});
+}
+
sub parse_vmfw_option {
my ($line) = @_;
} elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
$opt = lc($1);
$value = $2;
+ } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
+ $opt = lc($1);
+ $value = $2;
+ verify_ethertype($_) foreach split(/\s*,\s*/, $value);
} else {
die "can't parse option '$line'\n"
}
my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
+ my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose);
my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
- return ($ruleset, $ipset_ruleset, $rulesetv6);
+ return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
}
sub compile_iptables_filter {
return $ipset_ruleset;
}
+sub compile_ebtables_filter {
+ my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose) = @_;
+
+ return ({}, {}) if !$cluster_conf->{options}->{enable};
+
+ my $ruleset = {};
+
+ ruleset_create_chain($ruleset, "PVEFW-FORWARD");
+
+
+ ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
+ #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
+ ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
+ ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
+ ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
+
+ # generate firewall rules for QEMU VMs
+ foreach my $vmid (keys %{$vmdata->{qemu}}) {
+ eval {
+ my $conf = $vmdata->{qemu}->{$vmid};
+ my $vmfw_conf = $vmfw_configs->{$vmid};
+ return if !$vmfw_conf;
+
+ foreach my $netid (keys %$conf) {
+ next if $netid !~ m/^net(\d+)$/;
+ my $net = PVE::QemuServer::parse_net($conf->{$netid});
+ next if !$net->{firewall};
+ my $iface = "tap${vmid}i$1";
+ my $macaddr = $net->{macaddr};
+
+ generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
+
+ }
+ };
+ warn $@ if $@; # just to be sure - should not happen
+ }
+
+ # generate firewall rules for LXC containers
+ foreach my $vmid (keys %{$vmdata->{lxc}}) {
+ eval {
+ my $conf = $vmdata->{lxc}->{$vmid};
+
+ my $vmfw_conf = $vmfw_configs->{$vmid};
+ return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
+
+ foreach my $netid (keys %$conf) {
+ next if $netid !~ m/^net(\d+)$/;
+ my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
+ next if !$net->{firewall};
+ my $iface = "veth${vmid}i$1";
+ my $macaddr = $net->{hwaddr};
+ generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
+ }
+ };
+ warn $@ if $@; # just to be sure - should not happen
+ }
+
+ return $ruleset;
+}
+
+sub generate_tap_layer2filter {
+ my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid) = @_;
+ my $options = $vmfw_conf->{options};
+
+ my $tapchain = $iface."-OUT";
+
+ # ebtables remove zeros from mac pairs
+ $macaddr =~ s/0([0-9a-f])/$1/ig;
+ $macaddr = lc($macaddr);
+
+ ruleset_create_chain($ruleset, $tapchain);
+
+ if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
+ ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
+ }
+
+ if (defined($options->{layer2_protocols})){
+ foreach my $proto (split(/,/, $options->{layer2_protocols})) {
+ ruleset_addrule($ruleset, $tapchain, "-p $proto", '-j ACCEPT');
+ }
+ ruleset_addrule($ruleset, $tapchain, '', "-j DROP");
+ } else {
+ ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
+ }
+
+ ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
+}
+
sub get_ruleset_status {
my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
return wantarray ? ($cmdlist, $changes) : $cmdlist;
}
+sub get_ebtables_cmdlist {
+ my ($ruleset, $verbose) = @_;
+
+ my $changes = 0;
+ my $cmdlist = "*filter\n";
+
+ my ($active_chains, $hooks) = ebtables_get_chains();
+ my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
+
+ # create chains first
+ foreach my $chain (sort keys %$ruleset) {
+ my $stat = $statushash->{$chain};
+ die "internal error" if !$stat;
+ $cmdlist .= ":$chain ACCEPT\n";
+ }
+
+ if ($ruleset->{FORWARD}) {
+ $cmdlist .= "-A FORWARD -j PVEFW-FORWARD\n";
+ }
+
+ foreach my $chain (sort keys %$ruleset) {
+ my $stat = $statushash->{$chain};
+ die "internal error" if !$stat;
+ $changes = 1 if ($stat->{action} ne 'exists');
+
+ foreach my $cmd (@{$ruleset->{$chain}}) {
+ $cmdlist .= "$cmd\n";
+ }
+ }
+
+ return wantarray ? ($cmdlist, $changes) : $cmdlist;
+}
+
sub get_ipset_cmdlist {
my ($ruleset, $verbose) = @_;
}
sub apply_ruleset {
- my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
+ my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset, $verbose) = @_;
enable_bridge_firewall();
my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
+ my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset, $verbose);
if ($verbose) {
if ($ipset_changes) {
print "ip6tables changes:\n";
print $cmdlistv6;
}
+
+ if ($ebtables_changes) {
+ print "ebtables changes:\n";
+ print $ebtables_cmdlist;
+ }
}
my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
+ ebtables_restore_cmdlist($ebtables_cmdlist);
+
+ $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
+ PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
+
# test: re-read status and check if everything is up to date
my $active_chains = iptables_get_chains();
my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
}
}
+ my $active_ebtables_chains = ebtables_get_chains();
+ my $ebtables_statushash = get_ruleset_status($ebtables_ruleset, $active_ebtables_chains, \&iptables_chain_digest, 0);
+
+ foreach my $chain (sort keys %$ebtables_ruleset) {
+ my $stat = $ebtables_statushash->{$chain};
+ if ($stat->{action} ne 'exists') {
+ warn "ebtables : unable to update chain '$chain'\n";
+ $errors = 1;
+ }
+ }
+
die "unable to apply firewall changes\n" if $errors;
update_nf_conntrack_max($hostfw_conf);
my $hostfw_conf = load_hostfw_conf($cluster_conf);
- my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
+ my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
- apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
+ apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
};
run_locked($code);
projects / pve-firewall.git / blobdiff