]>
git.proxmox.com Git - pve-firewall.git/blob - src/PVE/FirewallSimulator.pm
1 package PVE
::FirewallSimulator
;
15 my $new_value = shift;
17 $debug = $new_value if defined($new_value);
41 my ($devre, $dev) = @_;
43 $devre =~ s/\+$/\.\*/;
44 return ($dev =~ m/^${devre}$/) ?
1 : 0;
48 my ($ipsetname, $ipset, $ipaddr) = @_;
50 my $ip = Net
::IP-
>new($ipaddr);
52 foreach my $entry (@$ipset) {
53 next if $entry =~ m/^create/; # simply ignore
54 if ($entry =~ m/add \S+ (\S+)$/) {
55 my $test = Net
::IP-
>new($1);
56 if ($test->overlaps($ip)) {
57 add_trace
("IPSET $ipsetname match $ipaddr\n");
69 my ($ipset_ruleset, $chain, $rule, $pkg) = @_;
71 $rule =~ s/^-A $chain // || die "got strange rule: $rule";
73 while (length($rule)) {
75 if ($rule =~ s/^-m conntrack --ctstate (\S+)\s*//) {
78 return undef if $cstate eq 'INVALID'; # no match
79 return undef if $cstate eq 'RELATED,ESTABLISHED'; # no match
81 next if $cstate =~ m/NEW/;
83 die "please implement cstate test '$cstate'";
86 if ($rule =~ s/^-m addrtype --src-type (\S+)\s*//) {
88 die "missing srctype" if !$pkg->{srctype
};
89 return undef if $atype ne $pkg->{srctype
};
92 if ($rule =~ s/^-m addrtype --dst-type (\S+)\s*//) {
94 die "missing dsttype" if !$pkg->{dsttype
};
95 return undef if $atype ne $pkg->{dsttype
};
98 if ($rule =~ s/^-i (\S+)\s*//) {
100 die "missing iface_in" if !$pkg->{iface_in
};
101 return undef if !nf_dev_match
($devre, $pkg->{iface_in
});
105 if ($rule =~ s/^-o (\S+)\s*//) {
107 die "missing iface_out" if !$pkg->{iface_out
};
108 return undef if !nf_dev_match
($devre, $pkg->{iface_out
});
112 if ($rule =~ s/^-p (tcp|udp)\s*//) {
113 die "missing proto" if !$pkg->{proto
};
114 return undef if $pkg->{proto
} ne $1; # no match
118 if ($rule =~ s/^--dport (\d+):(\d+)\s*//) {
119 die "missing dport" if !$pkg->{dport
};
120 return undef if ($pkg->{dport
} < $1) || ($pkg->{dport
} > $2); # no match
124 if ($rule =~ s/^--dport (\d+)\s*//) {
125 die "missing dport" if !$pkg->{dport
};
126 return undef if $pkg->{dport
} != $1; # no match
130 if ($rule =~ s/^-s (\S+)\s*//) {
131 die "missing source" if !$pkg->{source
};
132 my $ip = Net
::IP-
>new($1);
133 return undef if !$ip->overlaps(Net
::IP-
>new($pkg->{source
})); # no match
137 if ($rule =~ s/^-d (\S+)\s*//) {
138 die "missing destination" if !$pkg->{dest
};
139 my $ip = Net
::IP-
>new($1);
140 return undef if !$ip->overlaps(Net
::IP-
>new($pkg->{dest
})); # no match
144 if ($rule =~ s/^-m set --match-set (\S+) src\s*//) {
145 die "missing source" if !$pkg->{source
};
146 my $ipset = $ipset_ruleset->{$1};
147 die "no such ip set '$1'" if !$ipset;
148 return undef if !ipset_match
($1, $ipset, $pkg->{source
});
152 if ($rule =~ s/^-m set --match-set (\S+) dst\s*//) {
153 die "missing destination" if !$pkg->{dest
};
154 my $ipset = $ipset_ruleset->{$1};
155 die "no such ip set '$1'" if !$ipset;
156 return undef if !ipset_match
($1, $ipset, $pkg->{dest
});
160 if ($rule =~ s/^-m mac ! --mac-source (\S+)\s*//) {
161 die "missing source mac" if !$pkg->{mac_source
};
162 return undef if $pkg->{mac_source
} eq $1; # no match
166 if ($rule =~ s/^-m physdev --physdev-is-bridged --physdev-in (\S+)\s*//) {
168 return undef if !$pkg->{physdev_in
};
169 return undef if !nf_dev_match
($devre, $pkg->{physdev_in
});
173 if ($rule =~ s/^-m physdev --physdev-is-bridged --physdev-out (\S+)\s*//) {
175 return undef if !$pkg->{physdev_out
};
176 return undef if !nf_dev_match
($devre, $pkg->{physdev_out
});
180 if ($rule =~ s/^-m mark --mark (\d+)\s*//) {
181 return undef if !defined($mark) || $mark != $1;
187 if ($rule =~ s/^-j MARK --set-mark (\d+)\s*$//) {
192 if ($rule =~ s/^-j (\S+)\s*$//) {
196 if ($rule =~ s/^-g (\S+)\s*$//) {
200 if ($rule =~ s/^-j NFLOG --nflog-prefix \"[^\"]+\"$//) {
207 die "unable to parse rule: $rule";
210 sub ruleset_simulate_chain
{
211 my ($ruleset, $ipset_ruleset, $chain, $pkg) = @_;
213 add_trace
("ENTER chain $chain\n");
217 if ($chain eq 'PVEFW-Drop') {
218 add_trace
("LEAVE chain $chain\n");
219 return ('DROP', $counter);
221 if ($chain eq 'PVEFW-reject') {
222 add_trace
("LEAVE chain $chain\n");
223 return ('REJECT', $counter);
226 if ($chain eq 'PVEFW-tcpflags') {
227 add_trace
("LEAVE chain $chain\n");
228 return (undef, $counter);
231 my $rules = $ruleset->{$chain} ||
232 die "no such chain '$chain'";
234 foreach my $rule (@$rules) {
236 my ($goto, $action) = rule_match
($ipset_ruleset, $chain, $rule, $pkg);
237 if (!defined($action)) {
238 add_trace
("SKIP: $rule\n");
241 add_trace
("MATCH: $rule\n");
243 if ($action eq 'ACCEPT' || $action eq 'DROP' || $action eq 'REJECT') {
244 add_trace
("TERMINATE chain $chain: $action\n");
245 return ($action, $counter);
246 } elsif ($action eq 'RETURN') {
247 add_trace
("RETURN FROM chain $chain\n");
251 add_trace
("LEAVE chain $chain - goto $action\n");
252 return ruleset_simulate_chain
($ruleset, $ipset_ruleset, $action, $pkg)
254 #$rules = $ruleset->{$chain} || die "no such chain '$chain'";
256 my ($act, $ctr) = ruleset_simulate_chain
($ruleset, $ipset_ruleset, $action, $pkg);
258 return ($act, $counter) if $act;
259 add_trace
("CONTINUE chain $chain\n");
264 add_trace
("LEAVE chain $chain\n");
265 if ($chain =~ m/^PVEFW-(INPUT|OUTPUT|FORWARD)$/) {
266 return ('ACCEPT', $counter); # default policy
269 return (undef, $counter);
277 while (my ($k,$v) = each %$pkg) {
284 # Try to simulate packet traversal inside kernel. This invokes iptable
285 # checks several times.
287 my ($ruleset, $ipset_ruleset, $pkg, $from_info, $target, $start_state) = @_;
289 my $route_state = $start_state;
293 my $ipt_invocation_counter = 0;
294 my $rule_check_counter = 0;
296 while ($route_state ne $target->{iface
}) {
299 my $next_route_state;
302 $pkg->{iface_in
} = $pkg->{iface_out
} = undef;
303 $pkg->{physdev_in
} = $pkg->{physdev_out
} = undef;
305 if ($route_state eq 'from-bport') {
306 $next_route_state = $from_info->{bridge
} || die 'internal error';
307 $next_physdev_in = $from_info->{iface
} || die 'internal error';
308 } elsif ($route_state eq 'host') {
310 if ($target->{type
} eq 'bport') {
311 $pkg->{iface_in
} = 'lo';
312 $pkg->{iface_out
} = $target->{bridge
} || die 'internal error';
313 $chain = 'PVEFW-OUTPUT';
314 $next_route_state = $target->{iface
} || die 'internal error';
315 } elsif ($target->{type
} eq 'ct') {
316 $pkg->{iface_in
} = 'lo';
317 $pkg->{iface_out
} = 'venet0';
318 $chain = 'PVEFW-OUTPUT';
319 $next_route_state = 'venet-in';
320 } elsif ($target->{type
} eq 'vm') {
321 $pkg->{iface_in
} = 'lo';
322 $pkg->{iface_out
} = $target->{bridge
} || die 'internal error';
323 $chain = 'PVEFW-OUTPUT';
324 $next_route_state = 'fwbr-in';
329 } elsif ($route_state eq 'venet-out') {
331 if ($target->{type
} eq 'host') {
333 $chain = 'PVEFW-INPUT';
334 $pkg->{iface_in
} = 'venet0';
335 $pkg->{iface_out
} = 'lo';
336 $next_route_state = 'host';
338 } elsif ($target->{type
} eq 'bport') {
340 $chain = 'PVEFW-FORWARD';
341 $pkg->{iface_in
} = 'venet0';
342 $pkg->{iface_out
} = $target->{bridge
} || die 'internal error';
343 $next_route_state = $target->{iface
} || die 'internal error';
345 } elsif ($target->{type
} eq 'vm') {
347 $chain = 'PVEFW-FORWARD';
348 $pkg->{iface_in
} = 'venet0';
349 $pkg->{iface_out
} = $target->{bridge
} || die 'internal error';
350 $next_route_state = 'fwbr-in';
352 } elsif ($target->{type
} eq 'ct') {
354 $chain = 'PVEFW-FORWARD';
355 $pkg->{iface_in
} = 'venet0';
356 $pkg->{iface_out
} = 'venet0';
357 $next_route_state = 'venet-in';
363 } elsif ($route_state eq 'fwbr-out') {
365 $chain = 'PVEFW-FORWARD';
366 $next_route_state = $from_info->{bridge
} || die 'internal error';
367 $next_physdev_in = $from_info->{fwpr
} || die 'internal error';
368 $pkg->{iface_in
} = $from_info->{fwbr
} || die 'internal error';
369 $pkg->{iface_out
} = $from_info->{fwbr
} || die 'internal error';
370 $pkg->{physdev_in
} = $from_info->{tapdev
} || die 'internal error';
371 $pkg->{physdev_out
} = $from_info->{fwln
} || die 'internal error';
373 } elsif ($route_state eq 'fwbr-in') {
375 $chain = 'PVEFW-FORWARD';
376 $next_route_state = $target->{tapdev
};
377 $pkg->{iface_in
} = $target->{fwbr
} || die 'internal error';
378 $pkg->{iface_out
} = $target->{fwbr
} || die 'internal error';
379 $pkg->{physdev_in
} = $target->{fwln
} || die 'internal error';
380 $pkg->{physdev_out
} = $target->{tapdev
} || die 'internal error';
382 } elsif ($route_state =~ m/^vmbr\d+$/) {
384 die "missing physdev_in - internal error?" if !$physdev_in;
385 $pkg->{physdev_in
} = $physdev_in;
387 if ($target->{type
} eq 'host') {
389 $chain = 'PVEFW-INPUT';
390 $pkg->{iface_in
} = $route_state;
391 $pkg->{iface_out
} = 'lo';
392 $next_route_state = 'host';
394 } elsif ($target->{type
} eq 'bport') {
396 $chain = 'PVEFW-FORWARD';
397 $pkg->{iface_in
} = $route_state;
398 $pkg->{iface_out
} = $target->{bridge
} || die 'internal error';
399 # conditionally set physdev_out (same behavior as kernel)
400 if ($route_state eq $target->{bridge
}) {
401 $pkg->{physdev_out
} = $target->{iface
} || die 'internal error';
403 $next_route_state = $target->{iface
};
405 } elsif ($target->{type
} eq 'ct') {
407 $chain = 'PVEFW-FORWARD';
408 $pkg->{iface_in
} = $route_state;
409 $pkg->{iface_out
} = 'venet0';
410 $next_route_state = 'venet-in';
412 } elsif ($target->{type
} eq 'vm') {
414 $chain = 'PVEFW-FORWARD';
415 $pkg->{iface_in
} = $route_state;
416 $pkg->{iface_out
} = $target->{bridge
};
417 # conditionally set physdev_out (same behavior as kernel)
418 if ($route_state eq $target->{bridge
}) {
419 $pkg->{physdev_out
} = $target->{fwpr
} || die 'internal error';
421 $next_route_state = 'fwbr-in';
428 die "implement me $route_state";
431 die "internal error" if !defined($next_route_state);
434 add_trace
("IPT check at $route_state (chain $chain)\n");
435 add_trace
(Dumper
($pkg));
436 $ipt_invocation_counter++;
437 my ($res, $ctr) = ruleset_simulate_chain
($ruleset, $ipset_ruleset, $chain, $pkg);
438 $rule_check_counter += $ctr;
439 return ($res, $ipt_invocation_counter, $rule_check_counter) if $res ne 'ACCEPT';
442 $route_state = $next_route_state;
444 $physdev_in = $next_physdev_in;
447 return ('ACCEPT', $ipt_invocation_counter, $rule_check_counter);
450 sub extract_ct_info
{
451 my ($vmdata, $vmid) = @_;
453 my $info = { type
=> 'ct', vmid
=> $vmid };
455 my $conf = $vmdata->{openvz
}->{$vmid} || die "no such CT '$vmid'";
456 if ($conf->{ip_address
}) {
457 $info->{ip_address
} = $conf->{ip_address
}->{value
};
464 sub extract_vm_info
{
465 my ($vmdata, $vmid) = @_;
467 my $info = { type
=> 'vm', vmid
=> $vmid };
469 my $conf = $vmdata->{qemu
}->{$vmid} || die "no such VM '$vmid'";
470 my $net = PVE
::QemuServer
::parse_net
($conf->{net0
});
471 $info->{macaddr
} = $net->{macaddr
} || die "unable to get mac address";
472 $info->{bridge
} = $net->{bridge
} || die "unable to get bridge";
473 $info->{fwbr
} = "fwbr${vmid}i0";
474 $info->{tapdev
} = "tap${vmid}i0";
475 $info->{fwln
} = "fwln${vmid}i0";
476 $info->{fwpr
} = "fwpr${vmid}p0";
481 sub simulate_firewall
{
482 my ($ruleset, $ipset_ruleset, $host_ip, $vmdata, $test) = @_;
484 my $from = $test->{from
} || die "missing 'from' field";
485 my $to = $test->{to
} || die "missing 'to' field";
486 my $action = $test->{action
} || die "missing 'action'";
488 my $testid = $test->{id
};
490 die "from/to needs to be different" if $from eq $to;
498 srctype
=> 'UNICAST',
499 dsttype
=> 'UNICAST',
502 while (my ($k,$v) = each %$test) {
503 next if $k eq 'from';
505 next if $k eq 'action';
507 die "unknown attribute '$k'\n" if !exists($pkg->{$k});
515 if ($from eq 'host') {
516 $from_info->{type
} = 'host';
517 $start_state = 'host';
518 $pkg->{source
} = $host_ip if !defined($pkg->{source
});
519 } elsif ($from =~ m
|^(vmbr\d
+)/(\S
+)$|) {
520 $from_info->{type
} = 'bport';
521 $from_info->{bridge
} = $1;
522 $from_info->{iface
} = $2;
523 $start_state = 'from-bport';
524 } elsif ($from eq 'outside') {
525 $from_info->{type
} = 'bport';
526 $from_info->{bridge
} = 'vmbr0';
527 $from_info->{iface
} = 'eth0';
528 $start_state = 'from-bport';
529 } elsif ($from eq 'nfvm') {
530 $from_info->{type
} = 'bport';
531 $from_info->{bridge
} = 'vmbr0';
532 $from_info->{iface
} = 'tapXYZ';
533 $start_state = 'from-bport';
534 } elsif ($from =~ m/^ct(\d+)$/) {
536 $from_info = extract_ct_info
($vmdata, $vmid);
537 if ($from_info->{ip_address
}) {
538 $pkg->{source
} = $from_info->{ip_address
} if !defined($pkg->{source
});
539 $start_state = 'venet-out';
543 } elsif ($from =~ m/^vm(\d+)$/) {
545 $from_info = extract_vm_info
($vmdata, $vmid);
546 $start_state = 'fwbr-out';
547 $pkg->{mac_source
} = $from_info->{macaddr
};
549 die "unable to parse \"from => '$from'\"\n";
555 $target->{type
} = 'host';
556 $target->{iface
} = 'host';
557 $pkg->{dest
} = $host_ip if !defined($pkg->{dest
});
558 } elsif ($to =~ m
|^(vmbr\d
+)/(\S
+)$|) {
559 $target->{type
} = 'bport';
560 $target->{bridge
} = $1;
561 $target->{iface
} = $2;
562 } elsif ($to eq 'outside') {
563 $target->{type
} = 'bport';
564 $target->{bridge
} = 'vmbr0';
565 $target->{iface
} = 'eth0';
566 } elsif ($to eq 'nfvm') {
567 $target->{type
} = 'bport';
568 $target->{bridge
} = 'vmbr0';
569 $target->{iface
} = 'tapXYZ';
570 } elsif ($to =~ m/^ct(\d+)$/) {
572 $target = extract_ct_info
($vmdata, $vmid);
573 $target->{iface
} = 'venet-in';
575 if ($target->{ip_address
}) {
576 $pkg->{dest
} = $target->{ip_address
};
580 } elsif ($to =~ m/^vm(\d+)$/) {
582 $target = extract_vm_info
($vmdata, $vmid);
583 $target->{iface
} = $target->{tapdev
};
585 die "unable to parse \"to => '$to'\"\n";
588 $pkg->{source
} = '100.100.1.2' if !defined($pkg->{source
});
589 $pkg->{dest
} = '100.200.3.4' if !defined($pkg->{dest
});
591 my ($res, $ic, $rc) = route_packet
($ruleset, $ipset_ruleset, $pkg,
592 $from_info, $target, $start_state);
594 add_trace
("IPT statistics: invocation = $ic, checks = $rc\n");
596 return $res if $action eq 'QUERY';
598 die "test failed ($res != $action)\n" if $action ne $res;