X-Git-Url: https://git.proxmox.com/?p=pve-firewall.git;a=blobdiff_plain;f=PVE%2FFirewall.pm;h=f29d5ec8c9da3c3015840e5705296da9b21f06fa;hp=7ff4ddf52acce5e97338f2849490fad23caabcbd;hb=d6de1dc216e21fe6d4214d9ea7187ae6bf177bea;hpb=9a4644fa5560e9087b50e5f9c11699590ad8966e

diff --git a/PVE/Firewall.pm b/PVE/Firewall.pm
index 7ff4ddf..f29d5ec 100644
--- a/PVE/Firewall.pm
+++ b/PVE/Firewall.pm
@@ -5,8 +5,16 @@ use strict;
 use Data::Dumper;
 use PVE::Tools;
 use PVE::QemuServer;
+use File::Path;
+use IO::File;
+use Net::IP;
+use PVE::Tools qw(run_command);
+
+use Data::Dumper;
 
 my $macros;
+my @ruleset = ();
+
 sub get_shorewall_macros {
 
     return $macros if $macros;
@@ -19,9 +27,326 @@ sub get_shorewall_macros {
     return $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 $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");
+    }
+}
+
 my $generate_input_rule = sub {
     my ($zoneinfo, $rule, $net, $netid) = @_;
 
@@ -38,23 +363,36 @@ my $generate_input_rule = sub {
     my $action = $rule->{service} ? 
 	"$rule->{service}($rule->{action})" : $rule->{action};
 
-    my $source;
+    my $sources = [];
 
-    if ($zoneinfo->{$zone}->{type} eq 'bport') {
+    if (!$rule->{source}) {
+	push @$sources, 'all'; 
+    } elsif ($zoneinfo->{$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}";
+	my $zoneref = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error";
+
+	# using 'all' does not work, so we create one rule for
+	# each related zone on the same bridge
+	push @$sources, "${zoneref}:$rule->{source}";
+	foreach my $z (keys %$zoneinfo) {
+	    next if $z eq $zone;
+	    next if !$zoneinfo->{$z}->{bridge_zone};
+	    next if $zoneinfo->{$z}->{bridge_zone} ne $bridge_zone;
+	    $zoneref = $zoneinfo->{$z}->{zoneref} || die "internal error";
+	    push @$sources, "${zoneref}:$rule->{source}";
 	}
     } else {
-	$source = "all:$rule->{source}";
+	push @$sources, "all:$rule->{source}";
     }
 
-    return sprintf($rule_format, $action, $source, $dest, $rule->{proto} || '-', 
-		   $rule->{dport} || '-', $rule->{sport} || '-');
+    my $out = '';
+
+    foreach my $source (@$sources) {
+	$out .= sprintf($rule_format, $action, $source, $dest, $rule->{proto} || '-', 
+			$rule->{dport} || '-', $rule->{sport} || '-');
+    }
+
+    return $out;
 };
 
 my $generate_output_rule = sub {
@@ -82,7 +420,7 @@ my $generate_output_rule = sub {
 # we need complete VM configuration of all VMs (openvz/qemu)
 # in vmdata
 
-sub compile {
+my $compile_shorewall = sub {
     my ($targetdir, $vmdata, $rules) = @_;
 
     # remove existing data ?
@@ -103,11 +441,11 @@ sub compile {
     $register_bridge = sub {
 	my ($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',
@@ -138,7 +476,7 @@ sub compile {
 	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} = {
@@ -318,12 +656,165 @@ sub compile {
     }
 
     PVE::Tools::file_set_contents("$targetdir/rules", $out);
+};
+
+
+sub parse_fw_rules {
+    my ($filename, $fh) = @_;
+
+    my $section;
+
+    my $res = { in => [], out => [] };
+
+    my $macros = get_shorewall_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) {
+	    $section = lc($1);
+	    next;
+	}
+	next if !$section;
+
+	my ($action, $iface, $source, $dest, $proto, $dport, $sport) =
+	    split(/\s+/, $line);
+
+	if (!$action) {
+	    warn "skip incomplete line\n";
+	    next;
+	}
+
+	my $service;
+	if ($action =~ m/^(ACCEPT|DROP|REJECT|GROUP-(\S+))$/) {
+	    # OK
+	} elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
+	    ($service, $action) = ($1, $2);
+	    if (!$macros->{$service}) {
+		warn "unknown service '$service'\n";
+		next;
+	    }
+	} else {
+	    warn "unknown action '$action'\n";
+	    next;
+	}
+
+	$iface = undef if $iface && $iface eq '-';
+	if ($iface && $iface !~ m/^(net0|net1|net2|net3|net4|net5)$/) {
+	    warn "unknown interface '$iface'\n";
+	    next;
+	}
+
+	$proto = undef if $proto && $proto eq '-';
+	if ($proto && !(defined($protocols->{byname}->{$proto}) ||
+			defined($protocols->{byid}->{$proto}))) {
+	    warn "unknown protokol '$proto'\n";
+	    next;
+	}
+
+	$source = undef if $source && $source eq '-';
+	$dest = undef if $dest && $dest eq '-';
+
+	$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 {
+	    $nbsource = parse_address_list($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;
+	    next;
+
+	}
+
+
+	my $rule = {
+	    action => $action,
+	    service => $service,
+	    iface => $iface,
+	    source => $source,
+	    dest => $dest,
+	    nbsource => $nbsource,
+	    nbdest => $nbdest,
+	    proto => $proto,
+	    dport => $dport,
+	    sport => $sport,
+	    nbdport => $nbdport,
+	    nbsport => $nbsport,
+
+	};
+
+	push @{$res->{$section}}, $rule;
+    }
+
+    return $res;
+}
+
+sub read_local_vm_config {
+
+    my $openvz = {};
+
+    my $qemu = {};
+
+    my $list = PVE::QemuServer::config_list();
+
+    foreach my $vmid (keys %$list) {
+	#next if !($vmid eq '100' || $vmid eq '102');
+	my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
+	if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
+	    $qemu->{$vmid} = $conf;
+	}
+    }
+
+    my $vmdata = { openvz => $openvz, qemu => $qemu };
+
+    return $vmdata;
+};
+
+sub read_vm_firewall_rules {
+    my ($vmdata) = @_;
+    my $rules = {};
+    foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
+	my $filename = "/etc/pve/firewall/$vmid.fw";
+	my $fh = IO::File->new($filename, O_RDONLY);
+	next if !$fh;
+
+	$rules->{$vmid} = parse_fw_rules($filename, $fh);
+    }
+
+    return $rules;
+}
+
+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']);
 }
 
+sub compile_and_start {
+    my ($restart) = @_;
 
-sub activate {
+    compile();
 
+    PVE::Tools::run_command(['shorewall', $restart ? 'restart' : 'start']);
 }