X-Git-Url: https://git.proxmox.com/?p=pve-firewall.git;a=blobdiff_plain;f=PVE%2FFirewall.pm;h=8e5cfb1f996ccc0d552173c87cce02bcec9e0f76;hp=876700867bbf61112887fde8fd9dd2ef45583828;hb=a332200b53c7d2d53f9b4c76c50de56a252e8f5f;hpb=fcba0bebc7b7997845220cdff0fb16b31a886b3e

diff --git a/PVE/Firewall.pm b/PVE/Firewall.pm
index 8767008..8e5cfb1 100644
--- a/PVE/Firewall.pm
+++ b/PVE/Firewall.pm
@@ -8,19 +8,26 @@ use PVE::QemuServer;
 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;
 }
 
@@ -56,6 +63,7 @@ sub get_etc_services {
 
     $etc_services = $services;    
     
+
     return $etc_services;
 }
 
@@ -95,31 +103,445 @@ sub get_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)) {
-	    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) = @_;
 
@@ -214,11 +636,11 @@ my $compile_shorewall = sub {
     $register_bridge = sub {
 	my ($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',
@@ -249,7 +671,7 @@ my $compile_shorewall = sub {
 	my ($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} = {
@@ -433,24 +855,29 @@ my $compile_shorewall = sub {
 
 
 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);
@@ -461,7 +888,7 @@ sub parse_fw_rules {
 	}
 
 	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);
@@ -492,12 +919,16 @@ sub parse_fw_rules {
 
 	$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;
@@ -512,14 +943,20 @@ sub parse_fw_rules {
 	    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;
 }
 
@@ -559,18 +996,12 @@ sub read_vm_firewall_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']);
+    die "implement me";
 }
 
 sub compile_and_start {
@@ -578,8 +1009,7 @@ sub compile_and_start {
 
     compile();
 
-    PVE::Tools::run_command(['shorewall', $restart ? 'restart' : 'start']);
+     die "implement me";  
 }
 
-
 1;