[pve-firewall.git] / PVE / Firewall.pm

package PVE::Firewall;

use warnings;
use strict;
use Data::Dumper;
use PVE::Tools;
use PVE::QemuServer;

my $macros;
sub get_shorewall_macros {

    return $macros if $macros;

    foreach my $path (</usr/share/shorewall/macro.*>) {
	if ($path =~ m|/macro\.(\S+)$|) {
	    $macros->{$1} = 1;
	}
    }
    return $macros;
}


my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";

my $generate_input_rule = sub {
    my ($zoneinfo, $rule, $net, $netid) = @_;

    my $zone = $net->{zone} || die "internal error";
    my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error";
    my $tap = $net->{tap} || die "internal error";

    my $dest = "$zid:$tap";

    if ($rule->{dest}) {
	$dest .= ":$rule->{dest}";
    }

    my $action = $rule->{service} ? 
	"$rule->{service}($rule->{action})" : $rule->{action};

    my $source;

    if ($zoneinfo->{$zone}->{type} eq 'bport') {
	my $bridge_zone = $zoneinfo->{$zone}->{bridge_zone} || die "internal error";
	my $bridge_ext_zone = $zoneinfo->{$bridge_zone}->{bridge_ext_zone} || die "internal error";
	my $zoneref = $zoneinfo->{$bridge_ext_zone}->{zoneref} || die "internal error";
	if (!$rule->{source}) {
	    $source = "${zoneref}";
	} else {
	    $source = "${zoneref}:$rule->{source}";
	}
    } else {
	$source = "all:$rule->{source}";
    }

    return sprintf($rule_format, $action, $source, $dest, $rule->{proto} || '-', 
		   $rule->{dport} || '-', $rule->{sport} || '-');
};

my $generate_output_rule = sub {
    my ($zoneinfo, $rule, $net, $netid) = @_;

    my $zone = $net->{zone} || die "internal error";
    my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error";
    my $tap = $net->{tap} || die "internal error";

    my $action = $rule->{service} ? 
	"$rule->{service}($rule->{action})" : $rule->{action};
    
    my $dest;

    if (!$rule->{dest}) {
	$dest = 'all';
    } else {
	$dest = "all:$rule->{dest}";
    }

    return sprintf($rule_format, $action, "$zid:$tap", $dest, 
		   $rule->{proto} || '-', $rule->{dport} || '-', $rule->{sport} || '-');
};

# we need complete VM configuration of all VMs (openvz/qemu)
# in vmdata

sub compile {
    my ($targetdir, $vmdata, $rules) = @_;

    # remove existing data ?
    foreach my $file (qw(params zones rules interfaces  maclist  policy)) {
	unlink "$targetdir/$file";
    }

    my $netinfo;

    my $zoneinfo = {
	fw => { type => 'firewall' },
    };

    my $maclist = {};

    my $register_bridge;

    $register_bridge = sub {
	my ($bridge, $vlan) = @_;

	my $zone =  'z' . $bridge;

	return $zone if $zoneinfo->{$zone};

	my $ext_zone = "z${bridge}ext";

	$zoneinfo->{$zone} = {
	    type => 'bridge',
	    bridge => $bridge,
	    bridge_ext_zone => $ext_zone,
	};

	# physical input devices
	my $dir = "/sys/class/net/$bridge/brif";
	my $physical = {};
	PVE::Tools::dir_glob_foreach($dir, '((eth|bond).+)', sub {
	    my ($slave) = @_;
	    $physical->{$slave} = 1;
	});

	$zoneinfo->{$ext_zone} = {
	    type => 'bport',
	    bridge_zone => $zone,
	    ifaces => $physical,
	};

	return &$register_bridge("${bridge}v${vlan}") if defined($vlan);
	
	return $zone;
    };

    my $register_bridge_port = sub {
	my ($bridge, $vlan, $vmzone, $tap) = @_;

	my $bridge_zone = &$register_bridge($bridge, $vlan);
	my $zone = $bridge_zone . $vmzone;

	if (!$zoneinfo->{$zone}) {
	    $zoneinfo->{$zone} = {
		type => 'bport',
		bridge_zone => $bridge_zone,
		ifaces => {},
	    };
	}

	$zoneinfo->{$zone}->{ifaces}->{$tap} = 1;
	
	return $zone;
    };

    foreach my $vmid (keys %{$vmdata->{qemu}}) {
	$netinfo->{$vmid} = {};
	my $conf = $vmdata->{qemu}->{$vmid};
	foreach my $opt (keys %$conf) {
	    next if $opt !~ m/^net(\d+)$/;
	    my $netnum = $1;
	    my $net = PVE::QemuServer::parse_net($conf->{$opt});
	    next if !$net;
	    die "implement me" if !$net->{bridge};

	    my $vmzone = $conf->{zone} || "vm$vmid";
	    $net->{tap} = "tap${vmid}i${netnum}";
	    $maclist->{$net->{tap}} = $net->{macaddr} || die "internal error";
	    $net->{zone} = &$register_bridge_port($net->{bridge}, $net->{tag}, $vmzone, $net->{tap});
	    $netinfo->{$vmid}->{$opt} = $net;
	}
    }

    #print Dumper($netinfo);

    # NOTE: zone names have length limit, so we need to
    # translate them into shorter names 

    my $zoneid = 0;
    my $zonemap = { fw => 'fw' };

    my $lookup_zonename = sub {
	my ($zone) = @_;

	return $zonemap->{$zone} if defined($zonemap->{$zone});
	$zonemap->{$zone} = 'z' . $zoneid++;

	return $zonemap->{$zone};
    };

    foreach my $z (sort keys %$zoneinfo) {
	$zoneinfo->{$z}->{id} = &$lookup_zonename($z);
	$zoneinfo->{$z}->{zonevar} = uc($z);
 	$zoneinfo->{$z}->{zoneref} = '$' . $zoneinfo->{$z}->{zonevar};
    }

    my $out;

    # dump params file
    $out = "# PVE zones\n";
    foreach my $z (sort keys %$zoneinfo) {
	$out .= "$zoneinfo->{$z}->{zonevar}=$zoneinfo->{$z}->{id}\n";
    }
    PVE::Tools::file_set_contents("$targetdir/params", $out);

    # dump zone file

    my $format = "%-30s %-10s %-15s\n";
    $out = sprintf($format, '#ZONE', 'TYPE', 'OPTIONS');
    
    foreach my $z (sort keys %$zoneinfo) {
	my $zid = $zoneinfo->{$z}->{zoneref};
	if ($zoneinfo->{$z}->{type} eq 'firewall') {
	    $out .= sprintf($format, $zid, $zoneinfo->{$z}->{type}, '');
	} elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
	    $out .= sprintf($format, $zid, 'ipv4', '');
	} elsif ($zoneinfo->{$z}->{type} eq 'bport') {
	    my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
	    my $bzid = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error";
	    $out .= sprintf($format, "$zid:$bzid", 'bport', '');
	} else {
	    die "internal error";
	}
    }

    $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");

    PVE::Tools::file_set_contents("$targetdir/zones", $out);

    # dump interfaces

    $format = "%-25s %-20s %-10s %-15s\n";
    $out = sprintf($format, '#ZONE', 'INTERFACE', 'BROADCAST', 'OPTIONS');

    my $maclist_format = "%-15s %-15s %-15s\n";
    my $macs = sprintf($maclist_format, '#DISPOSITION', 'INTERFACE', 'MACZONE');

    foreach my $z (sort keys %$zoneinfo) {
	my $zid = $zoneinfo->{$z}->{zoneref};
	if ($zoneinfo->{$z}->{type} eq 'firewall') {
	    # do nothing;
	} elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
	    my $bridge = $zoneinfo->{$z}->{bridge} || die "internal error";
	    $out .= sprintf($format, $zid, $bridge, 'detect', 'bridge,optional');
	} elsif ($zoneinfo->{$z}->{type} eq 'bport') {
	    my $ifaces = $zoneinfo->{$z}->{ifaces};
	    foreach my $iface (sort keys %$ifaces) {
		my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
		my $bridge = $zoneinfo->{$bridge_zone}->{bridge} || die "internal error";
		my $iftxt = "$bridge:$iface";

		if ($maclist->{$iface}) {
		    $out .= sprintf($format, $zid, $iftxt, '-', 'maclist');
		    $macs .= sprintf($maclist_format, 'ACCEPT', $iface, $maclist->{$iface});
		} else {
		    $out .= sprintf($format, $zid, $iftxt, '-', '');
		}
	    }
	} else {
	    die "internal error";
	}
    }

    $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");

    PVE::Tools::file_set_contents("$targetdir/interfaces", $out);

    # dump maclist
    PVE::Tools::file_set_contents("$targetdir/maclist", $macs);

    # dump policy

    $format = "%-15s %-15s %-15s %s\n";
    $out = sprintf($format, '#SOURCE', 'DEST', 'POLICY', 'LOG');
    $out .= sprintf($format, 'fw', 'all', 'ACCEPT', '');

    # we need to disable intra-zone traffic on bridges. Else traffic
    # from untracked interfaces simply pass the firewall
    foreach my $z (sort keys %$zoneinfo) {
	my $zid = $zoneinfo->{$z}->{zoneref};
	if ($zoneinfo->{$z}->{type} eq 'bridge') {
	    $out .= sprintf($format, $zid, $zid, 'REJECT', 'info');
	}
    }
    $out .= sprintf($format, 'all', 'all', 'REJECT', 'info');

    PVE::Tools::file_set_contents("$targetdir/policy", $out);

    # dump rules
    $out = '';

    $out = sprintf($rule_format, '#ACTION', 'SOURCE', 'DEST', 'PROTO', 'DPORT', 'SPORT');
    foreach my $vmid (sort keys %$rules) {
	my $inrules = $rules->{$vmid}->{in};
	my $outrules = $rules->{$vmid}->{out};

	if (scalar(@$inrules)) {
	    $out .= "# IN to VM $vmid\n";
	    foreach my $rule (@$inrules) {
		foreach my $netid (keys %{$netinfo->{$vmid}}) {
		    my $net = $netinfo->{$vmid}->{$netid};
		    next if $rule->{iface} && $rule->{iface} ne $netid;
		    $out .= &$generate_input_rule($zoneinfo, $rule, $net, $netid);
		}
	    }
	}

	if (scalar(@$outrules)) {
	    $out .= "# OUT from VM $vmid\n";
	    foreach my $rule (@$outrules) {
		foreach my $netid (keys %{$netinfo->{$vmid}}) {
		    my $net = $netinfo->{$vmid}->{$netid};
		    next if $rule->{iface} && $rule->{iface} ne $netid;
		    $out .= &$generate_output_rule($zoneinfo, $rule, $net, $netid);
		}
	    }
	}
    }

    PVE::Tools::file_set_contents("$targetdir/rules", $out);

}


sub activate {

}


1;
Commit	Line	Data
	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	my $macros;
	10	sub get_shorewall_macros {
	11
	12	return $macros if $macros;
	13
	14	foreach my $path (</usr/share/shorewall/macro.*>) {
	15	if ($path =~ m\|/macro\.(\S+)$\|) {
	16	$macros->{$1} = 1;
	17	}
	18	}
	19	return $macros;
	20	}
	21
	22
	23	my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
	24
	25	my $generate_input_rule = sub {
	26	my ($zoneinfo, $rule, $net, $netid) = @_;
	27
	28	my $zone = $net->{zone} \|\| die "internal error";
	29	my $zid = $zoneinfo->{$zone}->{zoneref} \|\| die "internal error";
	30	my $tap = $net->{tap} \|\| die "internal error";
	31
	32	my $dest = "$zid:$tap";
	33
	34	if ($rule->{dest}) {
	35	$dest .= ":$rule->{dest}";
	36	}
	37
	38	my $action = $rule->{service} ?
	39	"$rule->{service}($rule->{action})" : $rule->{action};
	40
	41	my $source;
	42
	43	if ($zoneinfo->{$zone}->{type} eq 'bport') {
	44	my $bridge_zone = $zoneinfo->{$zone}->{bridge_zone} \|\| die "internal error";
	45	my $bridge_ext_zone = $zoneinfo->{$bridge_zone}->{bridge_ext_zone} \|\| die "internal error";
	46	my $zoneref = $zoneinfo->{$bridge_ext_zone}->{zoneref} \|\| die "internal error";
	47	if (!$rule->{source}) {
	48	$source = "${zoneref}";
	49	} else {
	50	$source = "${zoneref}:$rule->{source}";
	51	}
	52	} else {
	53	$source = "all:$rule->{source}";
	54	}
	55
	56	return sprintf($rule_format, $action, $source, $dest, $rule->{proto} \|\| '-',
	57	$rule->{dport} \|\| '-', $rule->{sport} \|\| '-');
	58	};
	59
	60	my $generate_output_rule = sub {
	61	my ($zoneinfo, $rule, $net, $netid) = @_;
	62
	63	my $zone = $net->{zone} \|\| die "internal error";
	64	my $zid = $zoneinfo->{$zone}->{zoneref} \|\| die "internal error";
	65	my $tap = $net->{tap} \|\| die "internal error";
	66
	67	my $action = $rule->{service} ?
	68	"$rule->{service}($rule->{action})" : $rule->{action};
	69
	70	my $dest;
	71
	72	if (!$rule->{dest}) {
	73	$dest = 'all';
	74	} else {
	75	$dest = "all:$rule->{dest}";
	76	}
	77
	78	return sprintf($rule_format, $action, "$zid:$tap", $dest,
	79	$rule->{proto} \|\| '-', $rule->{dport} \|\| '-', $rule->{sport} \|\| '-');
	80	};
	81
	82	# we need complete VM configuration of all VMs (openvz/qemu)
	83	# in vmdata
	84
	85	sub compile {
	86	my ($targetdir, $vmdata, $rules) = @_;
	87
	88	# remove existing data ?
	89	foreach my $file (qw(params zones rules interfaces maclist policy)) {
	90	unlink "$targetdir/$file";
	91	}
	92
	93	my $netinfo;
	94
	95	my $zoneinfo = {
	96	fw => { type => 'firewall' },
	97	};
	98
	99	my $maclist = {};
	100
	101	my $register_bridge;
	102
	103	$register_bridge = sub {
	104	my ($bridge, $vlan) = @_;
	105
	106	my $zone = 'z' . $bridge;
	107
	108	return $zone if $zoneinfo->{$zone};
	109
	110	my $ext_zone = "z${bridge}ext";
	111
	112	$zoneinfo->{$zone} = {
	113	type => 'bridge',
	114	bridge => $bridge,
	115	bridge_ext_zone => $ext_zone,
	116	};
	117
	118	# physical input devices
	119	my $dir = "/sys/class/net/$bridge/brif";
	120	my $physical = {};
	121	PVE::Tools::dir_glob_foreach($dir, '((eth\|bond).+)', sub {
	122	my ($slave) = @_;
	123	$physical->{$slave} = 1;
	124	});
	125
	126	$zoneinfo->{$ext_zone} = {
	127	type => 'bport',
	128	bridge_zone => $zone,
	129	ifaces => $physical,
	130	};
	131
	132	return &$register_bridge("${bridge}v${vlan}") if defined($vlan);
	133
	134	return $zone;
	135	};
	136
	137	my $register_bridge_port = sub {
	138	my ($bridge, $vlan, $vmzone, $tap) = @_;
	139
	140	my $bridge_zone = &$register_bridge($bridge, $vlan);
	141	my $zone = $bridge_zone . $vmzone;
	142
	143	if (!$zoneinfo->{$zone}) {
	144	$zoneinfo->{$zone} = {
	145	type => 'bport',
	146	bridge_zone => $bridge_zone,
	147	ifaces => {},
	148	};
	149	}
	150
	151	$zoneinfo->{$zone}->{ifaces}->{$tap} = 1;
	152
	153	return $zone;
	154	};
	155
	156	foreach my $vmid (keys %{$vmdata->{qemu}}) {
	157	$netinfo->{$vmid} = {};
	158	my $conf = $vmdata->{qemu}->{$vmid};
	159	foreach my $opt (keys %$conf) {
	160	next if $opt !~ m/^net(\d+)$/;
	161	my $netnum = $1;
	162	my $net = PVE::QemuServer::parse_net($conf->{$opt});
	163	next if !$net;
	164	die "implement me" if !$net->{bridge};
	165
	166	my $vmzone = $conf->{zone} \|\| "vm$vmid";
	167	$net->{tap} = "tap${vmid}i${netnum}";
	168	$maclist->{$net->{tap}} = $net->{macaddr} \|\| die "internal error";
	169	$net->{zone} = &$register_bridge_port($net->{bridge}, $net->{tag}, $vmzone, $net->{tap});
	170	$netinfo->{$vmid}->{$opt} = $net;
	171	}
	172	}
	173
	174	#print Dumper($netinfo);
	175
	176	# NOTE: zone names have length limit, so we need to
	177	# translate them into shorter names
	178
	179	my $zoneid = 0;
	180	my $zonemap = { fw => 'fw' };
	181
	182	my $lookup_zonename = sub {
	183	my ($zone) = @_;
	184
	185	return $zonemap->{$zone} if defined($zonemap->{$zone});
	186	$zonemap->{$zone} = 'z' . $zoneid++;
	187
	188	return $zonemap->{$zone};
	189	};
	190
	191	foreach my $z (sort keys %$zoneinfo) {
	192	$zoneinfo->{$z}->{id} = &$lookup_zonename($z);
	193	$zoneinfo->{$z}->{zonevar} = uc($z);
	194	$zoneinfo->{$z}->{zoneref} = '$' . $zoneinfo->{$z}->{zonevar};
	195	}
	196
	197	my $out;
	198
	199	# dump params file
	200	$out = "# PVE zones\n";
	201	foreach my $z (sort keys %$zoneinfo) {
	202	$out .= "$zoneinfo->{$z}->{zonevar}=$zoneinfo->{$z}->{id}\n";
	203	}
	204	PVE::Tools::file_set_contents("$targetdir/params", $out);
	205
	206	# dump zone file
	207
	208	my $format = "%-30s %-10s %-15s\n";
	209	$out = sprintf($format, '#ZONE', 'TYPE', 'OPTIONS');
	210
	211	foreach my $z (sort keys %$zoneinfo) {
	212	my $zid = $zoneinfo->{$z}->{zoneref};
	213	if ($zoneinfo->{$z}->{type} eq 'firewall') {
	214	$out .= sprintf($format, $zid, $zoneinfo->{$z}->{type}, '');
	215	} elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
	216	$out .= sprintf($format, $zid, 'ipv4', '');
	217	} elsif ($zoneinfo->{$z}->{type} eq 'bport') {
	218	my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} \|\| die "internal error";
	219	my $bzid = $zoneinfo->{$bridge_zone}->{zoneref} \|\| die "internal error";
	220	$out .= sprintf($format, "$zid:$bzid", 'bport', '');
	221	} else {
	222	die "internal error";
	223	}
	224	}
	225
	226	$out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
	227
	228	PVE::Tools::file_set_contents("$targetdir/zones", $out);
	229
	230	# dump interfaces
	231
	232	$format = "%-25s %-20s %-10s %-15s\n";
	233	$out = sprintf($format, '#ZONE', 'INTERFACE', 'BROADCAST', 'OPTIONS');
	234
	235	my $maclist_format = "%-15s %-15s %-15s\n";
	236	my $macs = sprintf($maclist_format, '#DISPOSITION', 'INTERFACE', 'MACZONE');
	237
	238	foreach my $z (sort keys %$zoneinfo) {
	239	my $zid = $zoneinfo->{$z}->{zoneref};
	240	if ($zoneinfo->{$z}->{type} eq 'firewall') {
	241	# do nothing;
	242	} elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
	243	my $bridge = $zoneinfo->{$z}->{bridge} \|\| die "internal error";
	244	$out .= sprintf($format, $zid, $bridge, 'detect', 'bridge,optional');
	245	} elsif ($zoneinfo->{$z}->{type} eq 'bport') {
	246	my $ifaces = $zoneinfo->{$z}->{ifaces};
	247	foreach my $iface (sort keys %$ifaces) {
	248	my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} \|\| die "internal error";
	249	my $bridge = $zoneinfo->{$bridge_zone}->{bridge} \|\| die "internal error";
	250	my $iftxt = "$bridge:$iface";
	251
	252	if ($maclist->{$iface}) {
	253	$out .= sprintf($format, $zid, $iftxt, '-', 'maclist');
	254	$macs .= sprintf($maclist_format, 'ACCEPT', $iface, $maclist->{$iface});
	255	} else {
	256	$out .= sprintf($format, $zid, $iftxt, '-', '');
	257	}
	258	}
	259	} else {
	260	die "internal error";
	261	}
	262	}
	263
	264	$out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
	265
	266	PVE::Tools::file_set_contents("$targetdir/interfaces", $out);
	267
	268	# dump maclist
	269	PVE::Tools::file_set_contents("$targetdir/maclist", $macs);
	270
	271	# dump policy
	272
	273	$format = "%-15s %-15s %-15s %s\n";
	274	$out = sprintf($format, '#SOURCE', 'DEST', 'POLICY', 'LOG');
	275	$out .= sprintf($format, 'fw', 'all', 'ACCEPT', '');
	276
	277	# we need to disable intra-zone traffic on bridges. Else traffic
	278	# from untracked interfaces simply pass the firewall
	279	foreach my $z (sort keys %$zoneinfo) {
	280	my $zid = $zoneinfo->{$z}->{zoneref};
	281	if ($zoneinfo->{$z}->{type} eq 'bridge') {
	282	$out .= sprintf($format, $zid, $zid, 'REJECT', 'info');
	283	}
	284	}
	285	$out .= sprintf($format, 'all', 'all', 'REJECT', 'info');
	286
	287	PVE::Tools::file_set_contents("$targetdir/policy", $out);
	288
	289	# dump rules
	290	$out = '';
	291
	292	$out = sprintf($rule_format, '#ACTION', 'SOURCE', 'DEST', 'PROTO', 'DPORT', 'SPORT');
	293	foreach my $vmid (sort keys %$rules) {
	294	my $inrules = $rules->{$vmid}->{in};
	295	my $outrules = $rules->{$vmid}->{out};
	296
	297	if (scalar(@$inrules)) {
	298	$out .= "# IN to VM $vmid\n";
	299	foreach my $rule (@$inrules) {
	300	foreach my $netid (keys %{$netinfo->{$vmid}}) {
	301	my $net = $netinfo->{$vmid}->{$netid};
	302	next if $rule->{iface} && $rule->{iface} ne $netid;
	303	$out .= &$generate_input_rule($zoneinfo, $rule, $net, $netid);
	304	}
	305	}
	306	}
	307
	308	if (scalar(@$outrules)) {
	309	$out .= "# OUT from VM $vmid\n";
	310	foreach my $rule (@$outrules) {
	311	foreach my $netid (keys %{$netinfo->{$vmid}}) {
	312	my $net = $netinfo->{$vmid}->{$netid};
	313	next if $rule->{iface} && $rule->{iface} ne $netid;
	314	$out .= &$generate_output_rule($zoneinfo, $rule, $net, $netid);
	315	}
	316	}
	317	}
	318	}
	319
	320	PVE::Tools::file_set_contents("$targetdir/rules", $out);
	321
	322	}
	323
	324
	325	sub activate {
	326
	327	}
	328
	329
	330	1;