use File::Path;
use IO::File;
use Net::IP;
+use PVE::Tools qw(run_command);
use Data::Dumper;
my $macros;
-sub get_shorewall_macros {
+my @ruleset = ();
+
+# todo: implement some kind of MACROS, like shorewall /usr/share/shorewall/macro.*
+sub get_firewall_macros {
return $macros if $macros;
- foreach my $path (</usr/share/shorewall/macro.*>) {
- if ($path =~ m|/macro\.(\S+)$|) {
- $macros->{$1} = 1;
- }
- }
+ #foreach my $path (</usr/share/shorewall/macro.*>) {
+ # if ($path =~ m|/macro\.(\S+)$|) {
+ # $macros->{$1} = 1;
+ # }
+ #}
+
+ $macros = {}; # fixme: implemet me
+
return $macros;
}
$etc_services = $services;
+
return $etc_services;
}
sub parse_address_list {
my ($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)) {
- next if $pon =~ m/^\d+$/ && $pon > 0 && $pon < 65536;
- next if defined($services->{byname}->{$pon});
- die "invalid port '$pon'\n";
+ 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 $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
+sub iptables {
+ my ($cmd) = @_;
+
+ run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
+}
+
+sub iptables_restore {
+
+ unshift (@ruleset, '*filter');
+ push (@ruleset, 'COMMIT');
+
+ my $cmdlist = join("\n", @ruleset);
+
+ run_command("echo '$cmdlist' | /sbin/iptables-restore -n", outfunc => sub {});
+}
+
+sub iptables_addrule {
+ my ($rule) = @_;
+
+ push (@ruleset, $rule);
+}
+
+sub iptables_chain_exist {
+ my ($chain) = @_;
+
+ eval{
+ iptables("-n --list $chain");
+ };
+ return undef if $@;
+
+ return 1;
+}
+
+sub iptables_rule_exist {
+ my ($rule) = @_;
+
+ eval{
+ iptables("-C $rule");
+ };
+ return undef if $@;
+
+ return 1;
+}
+
+sub iptables_generate_rule {
+ my ($chain, $rule) = @_;
+
+ my $cmd = "-A $chain";
+
+ $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};
+ $cmd .= " -j $rule->{action}" if $rule->{action};
+
+ iptables_addrule($cmd);
+
+}
+
+sub generate_bridge_rules {
+ my ($bridge) = @_;
+
+ if(!iptables_chain_exist("BRIDGEFW-OUT")){
+ iptables_addrule(":BRIDGEFW-OUT - [0:0]");
+ }
+
+ if(!iptables_chain_exist("BRIDGEFW-IN")){
+ iptables_addrule(":BRIDGEFW-IN - [0:0]");
+ }
+
+ if(!iptables_chain_exist("proxmoxfw-FORWARD")){
+ iptables_addrule(":proxmoxfw-FORWARD - [0:0]");
+ iptables_addrule("-I FORWARD -j proxmoxfw-FORWARD");
+ iptables_addrule("-A proxmoxfw-FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT");
+ iptables_addrule("-A proxmoxfw-FORWARD -m physdev --physdev-is-in --physdev-is-bridged -j BRIDGEFW-OUT");
+ iptables_addrule("-A proxmoxfw-FORWARD -m physdev --physdev-is-out --physdev-is-bridged -j BRIDGEFW-IN");
+
+ }
+
+ generate_proxmoxfwinput();
+
+ if(!iptables_chain_exist("$bridge-IN")){
+ iptables_addrule(":$bridge-IN - [0:0]");
+ iptables_addrule("-A proxmoxfw-FORWARD -i $bridge -j DROP"); #disable interbridge routing
+ iptables_addrule("-A BRIDGEFW-IN -j $bridge-IN");
+ iptables_addrule("-A $bridge-IN -j ACCEPT");
+
+ }
+
+ if(!iptables_chain_exist("$bridge-OUT")){
+ iptables_addrule(":$bridge-OUT - [0:0]");
+ iptables_addrule("-A proxmoxfw-FORWARD -o $bridge -j DROP"); # disable interbridge routing
+ iptables_addrule("-A BRIDGEFW-OUT -j $bridge-OUT");
+
+ }
+
+}
+
+
+sub generate_tap_rules_direction {
+ my ($iface, $netid, $rules, $bridge, $direction) = @_;
+
+ my $tapchain = "$iface-$direction";
+
+ iptables_addrule(":$tapchain - [0:0]");
+
+ iptables_addrule("-A $tapchain -m state --state INVALID -j DROP");
+ iptables_addrule("-A $tapchain -m state --state RELATED,ESTABLISHED -j ACCEPT");
+
+ if (scalar(@$rules)) {
+ foreach my $rule (@$rules) {
+ next if $rule->{iface} && $rule->{iface} ne $netid;
+ if($rule->{action} =~ m/^(GROUP-(\S+))$/){
+ $rule->{action} .= "-$direction";
+ #generate empty group rule if don't exist
+ if(!iptables_chain_exist($rule->{action})){
+ generate_group_rules($2);
+ }
+ }
+ #we go to vmbr-IN if accept in out rules
+ $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
+ iptables_generate_rule($tapchain, $rule);
+ }
+ }
+
+ iptables_addrule("-A $tapchain -j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
+ iptables_addrule("-A $tapchain -j DROP");
+
+ #plug the tap chain to bridge chain
+ my $physdevdirection = $direction eq 'IN' ? "out":"in";
+ my $rule = "$bridge-$direction -m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
+
+ if(!iptables_rule_exist($rule)){
+ iptables_addrule("-I $rule");
+ }
+
+ if($direction eq 'OUT'){
+ #add tap->host rules
+ my $rule = "proxmoxfw-INPUT -m physdev --physdev-$physdevdirection $iface -j $tapchain";
+
+ if(!iptables_rule_exist($rule)){
+ iptables_addrule("-A $rule");
+ }
+ }
+}
+
+sub generate_tap_rules {
+ my ($net, $netid, $vmid) = @_;
+
+ my $filename = "/etc/pve/firewall/$vmid.fw";
+ my $fh = IO::File->new($filename, O_RDONLY);
+ return if !$fh;
+
+ #generate bridge rules
+ my $bridge = $net->{bridge};
+ my $tag = $net->{tag};
+ $bridge .= "v$tag" if $tag;
+
+ #generate tap chain
+ my $rules = parse_fw_rules($filename, $fh);
+
+ my $inrules = $rules->{in};
+ my $outrules = $rules->{out};
+
+ my $iface = "tap".$vmid."i".$1 if $netid =~ m/net(\d+)/;
+
+ generate_bridge_rules($bridge);
+ generate_tap_rules_direction($iface, $netid, $inrules, $bridge, 'IN');
+ generate_tap_rules_direction($iface, $netid, $outrules, $bridge, 'OUT');
+ iptables_restore();
+}
+
+sub flush_tap_rules {
+ my ($net, $netid, $vmid) = @_;
+
+ my $bridge = $net->{bridge};
+ my $iface = "tap".$vmid."i".$1 if $netid =~ m/net(\d+)/;
+
+ flush_tap_rules_direction($iface, $bridge, 'IN');
+ flush_tap_rules_direction($iface, $bridge, 'OUT');
+ iptables_restore();
+}
+
+sub flush_tap_rules_direction {
+ my ($iface, $bridge, $direction) = @_;
+
+ my $tapchain = "$iface-$direction";
+
+ if(iptables_chain_exist($tapchain)){
+ iptables_addrule("-F $tapchain");
+
+ my $physdevdirection = $direction eq 'IN' ? "out":"in";
+ my $rule = "$bridge-$direction -m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
+ if(iptables_rule_exist($rule)){
+ iptables_addrule("-D $rule");
+ }
+
+ if($direction eq 'OUT'){
+ my $rule = "proxmoxfw-INPUT -m physdev --physdev-$physdevdirection $iface -j $tapchain";
+ if(iptables_rule_exist($rule)){
+ iptables_addrule("-D $rule");
+ }
+ }
+
+ iptables_addrule("-X $tapchain");
+ }
+}
+
+sub enablehostfw {
+
+ generate_proxmoxfwinput();
+ generate_proxmoxfwoutput();
+
+ my $filename = "/etc/pve/local/host.fw";
+ my $fh = IO::File->new($filename, O_RDONLY);
+ return if !$fh;
+
+ my $rules = parse_fw_rules($filename, $fh);
+ my $inrules = $rules->{in};
+ my $outrules = $rules->{out};
+
+ #host inbound firewall
+ iptables_addrule(":host-IN - [0:0]");
+ iptables_addrule("-A host-IN -m state --state INVALID -j DROP");
+ iptables_addrule("-A host-IN -m state --state RELATED,ESTABLISHED -j ACCEPT");
+ iptables_addrule("-A host-IN -i lo -j ACCEPT");
+ iptables_addrule("-A host-IN -m addrtype --dst-type MULTICAST -j ACCEPT");
+ iptables_addrule("-A host-IN -p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
+ iptables_addrule("-A host-IN -p udp -m udp --dport 9000 -j ACCEPT"); #corosync
+
+ if (scalar(@$inrules)) {
+ foreach my $rule (@$inrules) {
+ #we use RETURN because we need to check also tap rules
+ $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
+ iptables_generate_rule('host-IN', $rule);
+ }
+ }
+
+ iptables_addrule("-A host-IN -j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
+ iptables_addrule("-A host-IN -j DROP");
+
+ #host outbound firewall
+ iptables_addrule(":host-OUT - [0:0]");
+ iptables_addrule("-A host-OUT -m state --state INVALID -j DROP");
+ iptables_addrule("-A host-OUT -m state --state RELATED,ESTABLISHED -j ACCEPT");
+ iptables_addrule("-A host-OUT -o lo -j ACCEPT");
+ iptables_addrule("-A host-OUT -m addrtype --dst-type MULTICAST -j ACCEPT");
+ iptables_addrule("-A host-OUT -p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
+ iptables_addrule("-A host-OUT -p udp -m udp --dport 9000 -j ACCEPT"); #corosync
+
+ if (scalar(@$outrules)) {
+ foreach my $rule (@$outrules) {
+ #we use RETURN because we need to check also tap rules
+ $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
+ iptables_generate_rule('host-OUT', $rule);
+ }
+ }
+
+ iptables_addrule("-A host-OUT -j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
+ iptables_addrule("-A host-OUT -j DROP");
+
+
+ my $rule = "proxmoxfw-INPUT -j host-IN";
+ if(!iptables_rule_exist($rule)){
+ iptables_addrule("-I $rule");
+ }
+
+ $rule = "proxmoxfw-OUTPUT -j host-OUT";
+ if(!iptables_rule_exist($rule)){
+ iptables_addrule("-I $rule");
+ }
+
+ iptables_restore();
+
+
+}
+
+sub disablehostfw {
+
+ my $chain = "host-IN";
+
+ my $rule = "proxmoxfw-INPUT -j $chain";
+ if(iptables_rule_exist($rule)){
+ iptables_addrule("-D $rule");
+ }
+
+ if(iptables_chain_exist($chain)){
+ iptables_addrule("-F $chain");
+ iptables_addrule("-X $chain");
+ }
+
+ $chain = "host-OUT";
+
+ $rule = "proxmoxfw-OUTPUT -j $chain";
+ if(iptables_rule_exist($rule)){
+ iptables_addrule("-D $rule");
+ }
+
+ if(iptables_chain_exist($chain)){
+ iptables_addrule("-F $chain");
+ iptables_addrule("-X $chain");
+ }
+
+ iptables_restore();
+}
+
+sub generate_proxmoxfwinput {
+
+ if(!iptables_chain_exist("proxmoxfw-INPUT")){
+ iptables_addrule(":proxmoxfw-INPUT - [0:0]");
+ iptables_addrule("-I INPUT -j proxmoxfw-INPUT");
+ iptables_addrule("-A INPUT -j ACCEPT");
+ }
+}
+
+sub generate_proxmoxfwoutput {
+
+ if(!iptables_chain_exist("proxmoxfw-OUTPUT")){
+ iptables_addrule(":proxmoxfw-OUTPUT - [0:0]");
+ iptables_addrule("-I OUTPUT -j proxmoxfw-OUTPUT");
+ iptables_addrule("-A OUTPUT -j ACCEPT");
+ }
+
+}
+
+sub enable_group_rules {
+ my ($group) = @_;
+
+ generate_group_rules($group);
+ iptables_restore();
+}
+
+sub generate_group_rules {
+ my ($group) = @_;
+
+ my $filename = "/etc/pve/firewall/groups.fw";
+ my $fh = IO::File->new($filename, O_RDONLY);
+ return if !$fh;
+
+ my $rules = parse_fw_rules($filename, $fh, $group);
+ my $inrules = $rules->{in};
+ my $outrules = $rules->{out};
+
+ my $chain = "GROUP-".$group."-IN";
+
+ iptables_addrule(":$chain - [0:0]");
+
+ if (scalar(@$inrules)) {
+ foreach my $rule (@$inrules) {
+ iptables_generate_rule($chain, $rule);
+ }
+ }
+
+ $chain = "GROUP-".$group."-OUT";
+
+ iptables_addrule(":$chain - [0:0]");
+
+ if(!iptables_chain_exist("BRIDGEFW-OUT")){
+ iptables_addrule(":BRIDGEFW-OUT - [0:0]");
+ }
+
+ if(!iptables_chain_exist("BRIDGEFW-IN")){
+ iptables_addrule(":BRIDGEFW-IN - [0:0]");
+ }
+
+ if (scalar(@$outrules)) {
+ foreach my $rule (@$outrules) {
+ #we go the BRIDGEFW-IN because we need to check also other tap rules
+ #(and group rules can be set on any bridge, so we can't go to VMBRXX-IN)
+ $rule->{action} = 'BRIDGEFW-IN' if $rule->{action} eq 'ACCEPT';
+ iptables_generate_rule($chain, $rule);
+ }
+ }
+
+}
+
+sub disable_group_rules {
+ my ($group) = @_;
+
+ my $chain = "GROUP-".$group."-IN";
+
+ if(iptables_chain_exist($chain)){
+ iptables_addrule("-F $chain");
+ iptables_addrule("-X $chain");
+ }
+
+ $chain = "GROUP-".$group."-OUT";
+
+ if(iptables_chain_exist($chain)){
+ iptables_addrule("-F $chain");
+ iptables_addrule("-X $chain");
+ }
+
+ #iptables_restore will die if security group is linked in a tap chain
+ #maybe can we improve that, parsing each vm config, or parsing iptables -S
+ #to see if the security group is linked or not
+ iptables_restore();
+}
+
+
my $generate_input_rule = sub {
my ($zoneinfo, $rule, $net, $netid) = @_;
$register_bridge = sub {
my ($bridge, $vlan) = @_;
- my $zone = 'z' . $bridge;
+ my $zone = $bridge;
return $zone if $zoneinfo->{$zone};
- my $ext_zone = "z${bridge}ext";
+ my $ext_zone = "${bridge}_ext";
$zoneinfo->{$zone} = {
type => 'bridge',
my ($bridge, $vlan, $vmzone, $tap) = @_;
my $bridge_zone = &$register_bridge($bridge, $vlan);
- my $zone = $bridge_zone . $vmzone;
+ my $zone = $bridge_zone . '_' . $vmzone;
if (!$zoneinfo->{$zone}) {
$zoneinfo->{$zone} = {
sub parse_fw_rules {
- my ($filename, $fh) = @_;
+ my ($filename, $fh, $group) = @_;
my $section;
+ my $securitygroup;
+ my $securitygroupexist;
my $res = { in => [], out => [] };
- my $macros = get_shorewall_macros();
+ my $macros = get_firewall_macros();
my $protocols = get_etc_protocols();
while (defined(my $line = <$fh>)) {
next if $line =~ m/^#/;
next if $line =~ m/^\s*$/;
- if ($line =~ m/^\[(in|out)\]\s*$/i) {
+ if ($line =~ m/^\[(in|out)(:(\S+))?\]\s*$/i) {
$section = lc($1);
+ $securitygroup = lc($3) if $3;
+ $securitygroupexist = 1 if $securitygroup && $securitygroup eq $group;
next;
}
next if !$section;
+ next if $group && $securitygroup ne $group;
my ($action, $iface, $source, $dest, $proto, $dport, $sport) =
split(/\s+/, $line);
}
my $service;
- if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
+ if ($action =~ m/^(ACCEPT|DROP|REJECT|GROUP-(\S+))$/) {
# OK
} elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
($service, $action) = ($1, $2);
$dport = undef if $dport && $dport eq '-';
$sport = undef if $sport && $sport eq '-';
+ my $nbdport = undef;
+ my $nbsport = undef;
+ my $nbsource = undef;
+ my $nbdest = undef;
eval {
- parse_address_list($source) if $source;
- parse_address_list($dest) if $dest;
- parse_port_name_number_or_range($dport) if $dport;
- parse_port_name_number_or_range($sport) if $sport;
+ $nbsource = parse_address_list($source) if $source;
+ $nbdest = parse_address_list($dest) if $dest;
+ $nbdport = parse_port_name_number_or_range($dport) if $dport;
+ $nbsport = parse_port_name_number_or_range($sport) if $sport;
};
if (my $err = $@) {
warn $err;
iface => $iface,
source => $source,
dest => $dest,
+ nbsource => $nbsource,
+ nbdest => $nbdest,
proto => $proto,
dport => $dport,
sport => $sport,
+ nbdport => $nbdport,
+ nbsport => $nbsport,
+
};
push @{$res->{$section}}, $rule;
}
+ die "security group $group don't exist" if $group && !$securitygroupexist;
return $res;
}
}
sub compile {
-
my $vmdata = read_local_vm_config();
my $rules = read_vm_firewall_rules($vmdata);
# print Dumper($vmdata);
- my $swdir = '/etc/shorewall';
- mkdir $swdir;
-
- &$compile_shorewall($swdir, $vmdata, $rules);
-
- PVE::Tools::run_command(['shorewall', 'compile']);
+ die "implement me";
}
sub compile_and_start {
compile();
- PVE::Tools::run_command(['shorewall', $restart ? 'restart' : 'start']);
+ die "implement me";
}
-
1;
projects / pve-firewall.git / blobdiff