- add_trace("ENTER chain $chain\n");
-
- if ($chain eq 'PVEFW-Drop') {
- add_trace("LEAVE chain $chain\n");
- return 'DROP';
- }
- if ($chain eq 'PVEFW-reject') {
- add_trace("LEAVE chain $chain\n");
- return 'REJECT';
- }
-
- if ($chain eq 'PVEFW-tcpflags') {
- add_trace("LEAVE chain $chain\n");
- return undef;
- }
-
- my $rules = $ruleset->{$chain} ||
- die "no such chain '$chain'";
-
- foreach my $rule (@$rules) {
- my ($goto, $action) = rule_match($chain, $rule, $pkg);
- if (!defined($action)) {
- add_trace("SKIP: $rule\n");
- next;
- }
- add_trace("MATCH: $rule\n");
-
- if ($action eq 'ACCEPT' || $action eq 'DROP' || $action eq 'REJECT') {
- add_trace("TERMINATE chain $chain: $action\n");
- return $action;
- } elsif ($action eq 'RETURN') {
- add_trace("RETURN FROM chain $chain\n");
- last;
- } else {
- if ($goto) {
- add_trace("LEAVE chain $chain - goto $action\n");
- return ruleset_simulate_chain($ruleset, $action, $pkg)
- #$chain = $action;
- #$rules = $ruleset->{$chain} || die "no such chain '$chain'";
- } else {
- if ($action = ruleset_simulate_chain($ruleset, $action, $pkg)) {
- return $action;
- }
- add_trace("CONTINUE chain $chain\n");
- }
- }
- }
-
- add_trace("LEAVE chain $chain\n");
- if ($chain =~ m/^PVEFW-(INPUT|OUTPUT|FORWARD)$/) {
- return 'ACCEPT'; # default policy
- }
-
- return undef;
-}
-
-sub copy_packet {
- my ($pkg) = @_;
-
- my $res = {};
-
- while (my ($k,$v) = each %$pkg) {
- $res->{$k} = $v;
- }
-
- return $res;
-}
-
-# Try to simulate packet traversal inside kernel. This invokes iptable
-# checks several times.
-sub route_packet {
- my ($ruleset, $ipset_ruleset, $pkg, $from_info, $target, $start_state) = @_;
-
- my $route_state = $start_state;
-
- my $physdev_in;
-
- while ($route_state ne $target->{iface}) {
-
- my $chain;
- my $next_route_state;
- my $next_physdev_in;
-
- $pkg->{iface_in} = $pkg->{iface_out} = undef;
- $pkg->{physdev_in} = $pkg->{physdev_out} = undef;
-
- if ($route_state eq 'from-outside') {
- $next_route_state = $outside_bridge || die 'internal error';
- $next_physdev_in = $outside_iface || die 'internal error';
- } elsif ($route_state eq 'host') {
-
- if ($target->{type} eq 'outside') {
- $pkg->{iface_in} = 'lo';
- $pkg->{iface_out} = $outside_bridge;
- $chain = 'PVEFW-OUTPUT';
- $next_route_state = $outside_iface
- } elsif ($target->{type} eq 'ct') {
- $pkg->{iface_in} = 'lo';
- $pkg->{iface_out} = 'venet0';
- $chain = 'PVEFW-OUTPUT';
- $next_route_state = 'venet-in';
- } elsif ($target->{type} eq 'vm') {
- $pkg->{iface_in} = 'lo';
- $pkg->{iface_out} = $target->{bridge} || die 'internal error';
- $chain = 'PVEFW-OUTPUT';
- $next_route_state = 'fwbr-in';
- } else {
- die "implement me";
- }
-
- } elsif ($route_state eq 'venet-out') {
-
- if ($target->{type} eq 'host') {
-
- $chain = 'PVEFW-INPUT';
- $pkg->{iface_in} = 'venet0';
- $pkg->{iface_out} = 'lo';
- $next_route_state = 'host';
-
- } elsif ($target->{type} eq 'outside') {
-
- $chain = 'PVEFW-FORWARD';
- $pkg->{iface_in} = 'venet0';
- $pkg->{iface_out} = $outside_bridge;
- $next_route_state = $outside_iface;
-
- } elsif ($target->{type} eq 'vm') {
-
- $chain = 'PVEFW-FORWARD';
- $pkg->{iface_in} = 'venet0';
- $pkg->{iface_out} = $target->{bridge} || die 'internal error';
- $next_route_state = 'fwbr-in';
-
- } elsif ($target->{type} eq 'ct') {
-
- $chain = 'PVEFW-FORWARD';
- $pkg->{iface_in} = 'venet0';
- $pkg->{iface_out} = 'venet0';
- $next_route_state = 'venet-in';
-
- } else {
- die "implement me";
- }
-
- } elsif ($route_state eq 'fwbr-out') {
-
- $chain = 'PVEFW-FORWARD';
- $next_route_state = $from_info->{bridge} || die 'internal error';
- $next_physdev_in = $from_info->{fwpr} || die 'internal error';
- $pkg->{iface_in} = $from_info->{fwbr} || die 'internal error';
- $pkg->{iface_out} = $from_info->{fwbr} || die 'internal error';
- $pkg->{physdev_in} = $from_info->{tapdev} || die 'internal error';
- $pkg->{physdev_out} = $from_info->{fwln} || die 'internal error';
-
- } elsif ($route_state eq 'fwbr-in') {
-
- $chain = 'PVEFW-FORWARD';
- $next_route_state = $target->{tapdev};
- $pkg->{iface_in} = $target->{fwbr} || die 'internal error';
- $pkg->{iface_out} = $target->{fwbr} || die 'internal error';
- $pkg->{physdev_in} = $target->{fwln} || die 'internal error';
- $pkg->{physdev_out} = $target->{tapdev} || die 'internal error';
-
- } elsif ($route_state =~ m/^vmbr\d+$/) {
-
- die "missing physdev_in - internal error?" if !$physdev_in;
-
- if ($target->{type} eq 'host') {
-
- $chain = 'PVEFW-INPUT';
- $pkg->{iface_in} = $route_state;
- $pkg->{iface_out} = 'lo';
- $next_route_state = 'host';
-
- if ($route_state eq $outside_bridge) {
-
- } else {
-
- }
-
- } elsif ($target->{type} eq 'outside') {
-
- $chain = 'PVEFW-FORWARD';
- $pkg->{iface_in} = $route_state;
- $pkg->{iface_out} = $outside_bridge;
- $pkg->{physdev_in} = $physdev_in;
- # conditionally set physdev_out (same behavior as kernel)
- if ($route_state eq $outside_bridge) {
- $pkg->{physdev_out} = $outside_iface || die 'internal error';
- }
- $next_route_state = $outside_iface;
-
- } elsif ($target->{type} eq 'ct') {
-
- $chain = 'PVEFW-FORWARD';
- $pkg->{iface_in} = $route_state;
- $pkg->{iface_out} = 'venet0';
- $next_route_state = 'venet-in';
-
- } elsif ($target->{type} eq 'vm') {
-
- $chain = 'PVEFW-FORWARD';
- $pkg->{iface_in} = $route_state;
- $pkg->{iface_out} = $target->{bridge};
- $pkg->{physdev_in} = $physdev_in;
- # conditionally set physdev_out (same behavior as kernel)
- if ($route_state eq $target->{bridge}) {
- $pkg->{physdev_out} = $target->{fwpr} || die 'internal error';
- }
- $next_route_state = 'fwbr-in';
-
- } else {
- die "implement me";
- }
-
- } else {
- die "implement me $route_state";
- }
-
- die "internal error" if !defined($next_route_state);
-
- if ($chain) {
- add_trace("IPT check at $route_state (chain $chain)\n");
- add_trace(Dumper($pkg));
- my $res = ruleset_simulate_chain($ruleset, $chain, $pkg);
- return $res if $res ne 'ACCEPT';
- }
-
- $route_state = $next_route_state;
-
- $physdev_in = $next_physdev_in;
- }
-
- return 'ACCEPT';
-}
-
-sub extract_ct_info {
- my ($vmdata, $vmid) = @_;
-
- my $info = { type => 'ct', vmid => $vmid };
-
- my $conf = $vmdata->{openvz}->{$vmid} || die "no such CT '$vmid'";
- if ($conf->{ip_address}) {
- $info->{ip_address} = $conf->{ip_address}->{value};
- } else {
- die "implement me";
- }
- return $info;
-}
-
-sub extract_vm_info {
- my ($vmdata, $vmid) = @_;
-
- my $info = { type => 'vm', vmid => $vmid };
-
- my $conf = $vmdata->{qemu}->{$vmid} || die "no such VM '$vmid'";
- my $net = PVE::QemuServer::parse_net($conf->{net0});
- $info->{macaddr} = $net->{macaddr} || die "unable to get mac address";
- $info->{bridge} = $net->{bridge} || die "unable to get bridge";
- $info->{fwbr} = "fwbr${vmid}i0";
- $info->{tapdev} = "tap${vmid}i0";
- $info->{fwln} = "fwln${vmid}i0";
- $info->{fwpr} = "fwpr${vmid}p0";
-
- return $info;
-}
-
-sub simulate_firewall {
- my ($ruleset, $ipset_ruleset, $vmdata, $test) = @_;
-
- my $from = delete $test->{from} || die "missing 'from' field";
- my $to = delete $test->{to} || die "missing 'to' field";
- my $action = delete $test->{action} || die "missing 'action'";
-
- die "from/to needs to be different" if $from eq $to;
-
- my $pkg = {
- proto => 'tcp',
- sport => '1234',
- dport => '4321',
- source => '10.11.12.13',
- dest => '10.11.12.14',
- };
-
- while (my ($k,$v) = each %$test) {
- $pkg->{$k} = $v;
- }
-
- my $from_info = {};
-
- my $start_state;
-
- if ($from eq 'host') {
- $from_info->{type} = 'host';
- $start_state = 'host';
- } elsif ($from eq 'outside') {
- $from_info->{type} = 'outside';
- $start_state = 'from-outside';
- } elsif ($from =~ m/^ct(\d+)$/) {
- my $vmid = $1;
- $from_info = extract_ct_info($vmdata, $vmid);
- if ($from_info->{ip_address}) {
- $pkg->{source} = $from_info->{ip_address};
- $start_state = 'venet-out';
- } else {
- die "implement me";
- }
- } elsif ($from =~ m/^vm(\d+)$/) {
- my $vmid = $1;
- $from_info = extract_vm_info($vmdata, $vmid);
- $start_state = 'fwbr-out';
- $pkg->{mac_source} = $from_info->{macaddr};
- } else {
- die "implement me";
- }
-
- my $target;
-
- if ($to eq 'host') {
- $target->{type} = 'host';
- $target->{iface} = 'host';
- } elsif ($to eq 'outside') {
- $target->{type} = 'outside';
- $target->{iface} = $outside_iface;
- } elsif ($to =~ m/^ct(\d+)$/) {
- my $vmid = $1;
- $target = extract_ct_info($vmdata, $vmid);
- $target->{iface} = 'venet-in';
-
- if ($target->{ip_address}) {
- $pkg->{dest} = $target->{ip_address};
- } else {
- die "implement me";
- }
- } elsif ($to =~ m/^vm(\d+)$/) {
- my $vmid = $1;
- $target = extract_vm_info($vmdata, $vmid);
- $target->{iface} = $target->{tapdev};
- } else {
- die "implement me";
- }