]>
git.proxmox.com Git - pve-firewall.git/blob - src/PVE/FirewallSimulator.pm
b522776df8f3b3b1299b5e751b4170ebd842a754
1 package PVE
::FirewallSimulator
;
15 my $new_value = shift;
17 $debug = $new_value if defined($new_value);
40 $SIG{'__WARN__'} = sub {
49 my ($devre, $dev) = @_;
51 $devre =~ s/\+$/\.\*/;
52 return ($dev =~ m/^${devre}$/) ?
1 : 0;
56 my ($ipsetname, $ipset, $ipaddr) = @_;
58 my $ip = Net
::IP-
>new($ipaddr);
60 foreach my $entry (@$ipset) {
61 next if $entry =~ m/^create/; # simply ignore
62 if ($entry =~ m/add \S+ (\S+)$/) {
63 my $test = Net
::IP-
>new($1);
64 if ($test->overlaps($ip)) {
65 add_trace
("IPSET $ipsetname match $ipaddr\n");
77 my ($ipset_ruleset, $chain, $rule, $pkg) = @_;
79 $rule =~ s/^-A $chain // || die "got strange rule: $rule";
81 while (length($rule)) {
83 if ($rule =~ s/^-m conntrack --ctstate (\S+)\s*//) {
86 return undef if $cstate eq 'INVALID'; # no match
87 return undef if $cstate eq 'RELATED,ESTABLISHED'; # no match
89 next if $cstate =~ m/NEW/;
91 die "cstate test '$cstate' not implemented\n";
94 if ($rule =~ s/^-m addrtype --src-type (\S+)\s*//) {
96 die "missing source address type (srctype)\n"
98 return undef if $atype ne $pkg->{srctype
};
101 if ($rule =~ s/^-m addrtype --dst-type (\S+)\s*//) {
103 die "missing destination address type (dsttype)\n"
105 return undef if $atype ne $pkg->{dsttype
};
108 if ($rule =~ s/^-i (\S+)\s*//) {
110 die "missing interface (iface_in)\n" if !$pkg->{iface_in
};
111 return undef if !nf_dev_match
($devre, $pkg->{iface_in
});
115 if ($rule =~ s/^-o (\S+)\s*//) {
117 die "missing interface (iface_out)\n" if !$pkg->{iface_out
};
118 return undef if !nf_dev_match
($devre, $pkg->{iface_out
});
122 if ($rule =~ s/^-p (tcp|udp|igmp|icmp)\s*//) {
123 die "missing proto" if !$pkg->{proto
};
124 return undef if $pkg->{proto
} ne $1; # no match
128 if ($rule =~ s/^--dport (\d+):(\d+)\s*//) {
129 die "missing dport" if !$pkg->{dport
};
130 return undef if ($pkg->{dport
} < $1) || ($pkg->{dport
} > $2); # no match
134 if ($rule =~ s/^--dport (\d+)\s*//) {
135 die "missing dport" if !$pkg->{dport
};
136 return undef if $pkg->{dport
} != $1; # no match
140 if ($rule =~ s/^-s (\S+)\s*//) {
141 die "missing source" if !$pkg->{source
};
142 my $ip = Net
::IP-
>new($1);
143 return undef if !$ip->overlaps(Net
::IP-
>new($pkg->{source
})); # no match
147 if ($rule =~ s/^-d (\S+)\s*//) {
148 die "missing destination" if !$pkg->{dest
};
149 my $ip = Net
::IP-
>new($1);
150 return undef if !$ip->overlaps(Net
::IP-
>new($pkg->{dest
})); # no match
154 if ($rule =~ s/^-m set --match-set (\S+) src\s*//) {
155 die "missing source" if !$pkg->{source
};
156 my $ipset = $ipset_ruleset->{$1};
157 die "no such ip set '$1'" if !$ipset;
158 return undef if !ipset_match
($1, $ipset, $pkg->{source
});
162 if ($rule =~ s/^-m set --match-set (\S+) dst\s*//) {
163 die "missing destination" if !$pkg->{dest
};
164 my $ipset = $ipset_ruleset->{$1};
165 die "no such ip set '$1'" if !$ipset;
166 return undef if !ipset_match
($1, $ipset, $pkg->{dest
});
170 if ($rule =~ s/^-m mac ! --mac-source (\S+)\s*//) {
171 die "missing source mac" if !$pkg->{mac_source
};
172 return undef if $pkg->{mac_source
} eq $1; # no match
176 if ($rule =~ s/^-m physdev --physdev-is-bridged --physdev-in (\S+)\s*//) {
178 return undef if !$pkg->{physdev_in
};
179 return undef if !nf_dev_match
($devre, $pkg->{physdev_in
});
183 if ($rule =~ s/^-m physdev --physdev-is-bridged --physdev-out (\S+)\s*//) {
185 return undef if !$pkg->{physdev_out
};
186 return undef if !nf_dev_match
($devre, $pkg->{physdev_out
});
190 if ($rule =~ s/^-m mark --mark (\d+)\s*//) {
191 return undef if !defined($mark) || $mark != $1;
197 if ($rule =~ s/^-j MARK --set-mark (\d+)\s*$//) {
202 if ($rule =~ s/^-j (\S+)\s*$//) {
206 if ($rule =~ s/^-g (\S+)\s*$//) {
210 if ($rule =~ s/^-j NFLOG --nflog-prefix \"[^\"]+\"$//) {
217 die "unable to parse rule: $rule";
220 sub ruleset_simulate_chain
{
221 my ($ruleset, $ipset_ruleset, $chain, $pkg) = @_;
223 add_trace
("ENTER chain $chain\n");
227 if ($chain eq 'PVEFW-Drop') {
228 add_trace
("LEAVE chain $chain\n");
229 return ('DROP', $counter);
231 if ($chain eq 'PVEFW-reject') {
232 add_trace
("LEAVE chain $chain\n");
233 return ('REJECT', $counter);
236 if ($chain eq 'PVEFW-tcpflags') {
237 add_trace
("LEAVE chain $chain\n");
238 return (undef, $counter);
241 my $rules = $ruleset->{$chain} ||
242 die "no such chain '$chain'";
244 foreach my $rule (@$rules) {
246 my ($goto, $action) = rule_match
($ipset_ruleset, $chain, $rule, $pkg);
247 if (!defined($action)) {
248 add_trace
("SKIP: $rule\n");
251 add_trace
("MATCH: $rule\n");
253 if ($action eq 'ACCEPT' || $action eq 'DROP' || $action eq 'REJECT') {
254 add_trace
("TERMINATE chain $chain: $action\n");
255 return ($action, $counter);
256 } elsif ($action eq 'RETURN') {
257 add_trace
("RETURN FROM chain $chain\n");
261 add_trace
("LEAVE chain $chain - goto $action\n");
262 return ruleset_simulate_chain
($ruleset, $ipset_ruleset, $action, $pkg)
264 #$rules = $ruleset->{$chain} || die "no such chain '$chain'";
266 my ($act, $ctr) = ruleset_simulate_chain
($ruleset, $ipset_ruleset, $action, $pkg);
268 return ($act, $counter) if $act;
269 add_trace
("CONTINUE chain $chain\n");
274 add_trace
("LEAVE chain $chain\n");
275 if ($chain =~ m/^PVEFW-(INPUT|OUTPUT|FORWARD)$/) {
276 return ('ACCEPT', $counter); # default policy
279 return (undef, $counter);
287 while (my ($k,$v) = each %$pkg) {
294 # Try to simulate packet traversal inside kernel. This invokes iptable
295 # checks several times.
297 my ($ruleset, $ipset_ruleset, $pkg, $from_info, $target, $start_state) = @_;
299 my $route_state = $start_state;
303 my $ipt_invocation_counter = 0;
304 my $rule_check_counter = 0;
306 while ($route_state ne $target->{iface
}) {
309 my $next_route_state;
312 $pkg->{iface_in
} = $pkg->{iface_out
} = undef;
313 $pkg->{physdev_in
} = $pkg->{physdev_out
} = undef;
315 if ($route_state eq 'from-bport') {
316 $next_route_state = $from_info->{bridge
} || die 'internal error';
317 $next_physdev_in = $from_info->{iface
} || die 'internal error';
318 } elsif ($route_state eq 'host') {
320 if ($target->{type
} eq 'bport') {
321 $pkg->{iface_in
} = 'lo';
322 $pkg->{iface_out
} = $target->{bridge
} || die 'internal error';
323 $chain = 'PVEFW-OUTPUT';
324 $next_route_state = $target->{iface
} || die 'internal error';
325 } elsif ($target->{type
} eq 'ct') {
326 $pkg->{iface_in
} = 'lo';
327 $pkg->{iface_out
} = 'venet0';
328 $chain = 'PVEFW-OUTPUT';
329 $next_route_state = 'venet-in';
330 } elsif ($target->{type
} eq 'vm') {
331 $pkg->{iface_in
} = 'lo';
332 $pkg->{iface_out
} = $target->{bridge
} || die 'internal error';
333 $chain = 'PVEFW-OUTPUT';
334 $next_route_state = 'fwbr-in';
339 } elsif ($route_state eq 'venet-out') {
341 if ($target->{type
} eq 'host') {
343 $chain = 'PVEFW-INPUT';
344 $pkg->{iface_in
} = 'venet0';
345 $pkg->{iface_out
} = 'lo';
346 $next_route_state = 'host';
348 } elsif ($target->{type
} eq 'bport') {
350 $chain = 'PVEFW-FORWARD';
351 $pkg->{iface_in
} = 'venet0';
352 $pkg->{iface_out
} = $target->{bridge
} || die 'internal error';
353 $next_route_state = $target->{iface
} || die 'internal error';
355 } elsif ($target->{type
} eq 'vm') {
357 $chain = 'PVEFW-FORWARD';
358 $pkg->{iface_in
} = 'venet0';
359 $pkg->{iface_out
} = $target->{bridge
} || die 'internal error';
360 $next_route_state = 'fwbr-in';
362 } elsif ($target->{type
} eq 'ct') {
364 $chain = 'PVEFW-FORWARD';
365 $pkg->{iface_in
} = 'venet0';
366 $pkg->{iface_out
} = 'venet0';
367 $next_route_state = 'venet-in';
373 } elsif ($route_state eq 'fwbr-out') {
375 $chain = 'PVEFW-FORWARD';
376 $next_route_state = $from_info->{bridge
} || die 'internal error';
377 $next_physdev_in = $from_info->{fwpr
} || die 'internal error';
378 $pkg->{iface_in
} = $from_info->{fwbr
} || die 'internal error';
379 $pkg->{iface_out
} = $from_info->{fwbr
} || die 'internal error';
380 $pkg->{physdev_in
} = $from_info->{tapdev
} || die 'internal error';
381 $pkg->{physdev_out
} = $from_info->{fwln
} || die 'internal error';
383 } elsif ($route_state eq 'fwbr-in') {
385 $chain = 'PVEFW-FORWARD';
386 $next_route_state = $target->{tapdev
};
387 $pkg->{iface_in
} = $target->{fwbr
} || die 'internal error';
388 $pkg->{iface_out
} = $target->{fwbr
} || die 'internal error';
389 $pkg->{physdev_in
} = $target->{fwln
} || die 'internal error';
390 $pkg->{physdev_out
} = $target->{tapdev
} || die 'internal error';
392 } elsif ($route_state =~ m/^vmbr\d+$/) {
394 die "missing physdev_in - internal error?" if !$physdev_in;
395 $pkg->{physdev_in
} = $physdev_in;
397 if ($target->{type
} eq 'host') {
399 $chain = 'PVEFW-INPUT';
400 $pkg->{iface_in
} = $route_state;
401 $pkg->{iface_out
} = 'lo';
402 $next_route_state = 'host';
404 } elsif ($target->{type
} eq 'bport') {
406 $chain = 'PVEFW-FORWARD';
407 $pkg->{iface_in
} = $route_state;
408 $pkg->{iface_out
} = $target->{bridge
} || die 'internal error';
409 # conditionally set physdev_out (same behavior as kernel)
410 if ($route_state eq $target->{bridge
}) {
411 $pkg->{physdev_out
} = $target->{iface
} || die 'internal error';
413 $next_route_state = $target->{iface
};
415 } elsif ($target->{type
} eq 'ct') {
417 $chain = 'PVEFW-FORWARD';
418 $pkg->{iface_in
} = $route_state;
419 $pkg->{iface_out
} = 'venet0';
420 $next_route_state = 'venet-in';
422 } elsif ($target->{type
} eq 'vm') {
424 $chain = 'PVEFW-FORWARD';
425 $pkg->{iface_in
} = $route_state;
426 $pkg->{iface_out
} = $target->{bridge
};
427 # conditionally set physdev_out (same behavior as kernel)
428 if ($route_state eq $target->{bridge
}) {
429 $pkg->{physdev_out
} = $target->{fwpr
} || die 'internal error';
431 $next_route_state = 'fwbr-in';
438 die "implement me $route_state";
441 die "internal error" if !defined($next_route_state);
444 add_trace
("IPT check at $route_state (chain $chain)\n");
445 add_trace
(Dumper
($pkg));
446 $ipt_invocation_counter++;
447 my ($res, $ctr) = ruleset_simulate_chain
($ruleset, $ipset_ruleset, $chain, $pkg);
448 $rule_check_counter += $ctr;
449 return ($res, $ipt_invocation_counter, $rule_check_counter) if $res ne 'ACCEPT';
452 $route_state = $next_route_state;
454 $physdev_in = $next_physdev_in;
457 return ('ACCEPT', $ipt_invocation_counter, $rule_check_counter);
460 sub extract_ct_info
{
461 my ($vmdata, $vmid) = @_;
463 my $info = { type
=> 'ct', vmid
=> $vmid };
465 my $conf = $vmdata->{openvz
}->{$vmid} || die "no such CT '$vmid'";
466 if ($conf->{ip_address
}) {
467 $info->{ip_address
} = $conf->{ip_address
}->{value
};
474 sub extract_vm_info
{
475 my ($vmdata, $vmid) = @_;
477 my $info = { type
=> 'vm', vmid
=> $vmid };
479 my $conf = $vmdata->{qemu
}->{$vmid} || die "no such VM '$vmid'";
480 my $net = PVE
::QemuServer
::parse_net
($conf->{net0
});
481 $info->{macaddr
} = $net->{macaddr
} || die "unable to get mac address";
482 $info->{bridge
} = $net->{bridge
} || die "unable to get bridge";
483 $info->{fwbr
} = "fwbr${vmid}i0";
484 $info->{tapdev
} = "tap${vmid}i0";
485 $info->{fwln
} = "fwln${vmid}i0";
486 $info->{fwpr
} = "fwpr${vmid}p0";
491 sub simulate_firewall
{
492 my ($ruleset, $ipset_ruleset, $host_ip, $vmdata, $test) = @_;
494 my $from = $test->{from
} || die "missing 'from' field";
495 my $to = $test->{to
} || die "missing 'to' field";
496 my $action = $test->{action
} || die "missing 'action'";
498 my $testid = $test->{id
};
500 die "from/to needs to be different" if $from eq $to;
508 srctype
=> 'UNICAST',
509 dsttype
=> 'UNICAST',
512 while (my ($k,$v) = each %$test) {
513 next if $k eq 'from';
515 next if $k eq 'action';
517 die "unknown attribute '$k'\n" if !exists($pkg->{$k});
525 if ($from eq 'host') {
526 $from_info->{type
} = 'host';
527 $start_state = 'host';
528 $pkg->{source
} = $host_ip if !defined($pkg->{source
});
529 } elsif ($from =~ m
|^(vmbr\d
+)/(\S
+)$|) {
530 $from_info->{type
} = 'bport';
531 $from_info->{bridge
} = $1;
532 $from_info->{iface
} = $2;
533 $start_state = 'from-bport';
534 } elsif ($from eq 'outside') {
535 $from_info->{type
} = 'bport';
536 $from_info->{bridge
} = 'vmbr0';
537 $from_info->{iface
} = 'eth0';
538 $start_state = 'from-bport';
539 } elsif ($from eq 'nfvm') {
540 $from_info->{type
} = 'bport';
541 $from_info->{bridge
} = 'vmbr0';
542 $from_info->{iface
} = 'tapXYZ';
543 $start_state = 'from-bport';
544 } elsif ($from =~ m/^ct(\d+)$/) {
546 $from_info = extract_ct_info
($vmdata, $vmid);
547 if ($from_info->{ip_address
}) {
548 $pkg->{source
} = $from_info->{ip_address
} if !defined($pkg->{source
});
549 $start_state = 'venet-out';
553 } elsif ($from =~ m/^vm(\d+)$/) {
555 $from_info = extract_vm_info
($vmdata, $vmid);
556 $start_state = 'fwbr-out';
557 $pkg->{mac_source
} = $from_info->{macaddr
};
559 die "unable to parse \"from => '$from'\"\n";
565 $target->{type
} = 'host';
566 $target->{iface
} = 'host';
567 $pkg->{dest
} = $host_ip if !defined($pkg->{dest
});
568 } elsif ($to =~ m
|^(vmbr\d
+)/(\S
+)$|) {
569 $target->{type
} = 'bport';
570 $target->{bridge
} = $1;
571 $target->{iface
} = $2;
572 } elsif ($to eq 'outside') {
573 $target->{type
} = 'bport';
574 $target->{bridge
} = 'vmbr0';
575 $target->{iface
} = 'eth0';
576 } elsif ($to eq 'nfvm') {
577 $target->{type
} = 'bport';
578 $target->{bridge
} = 'vmbr0';
579 $target->{iface
} = 'tapXYZ';
580 } elsif ($to =~ m/^ct(\d+)$/) {
582 $target = extract_ct_info
($vmdata, $vmid);
583 $target->{iface
} = 'venet-in';
585 if ($target->{ip_address
}) {
586 $pkg->{dest
} = $target->{ip_address
};
590 } elsif ($to =~ m/^vm(\d+)$/) {
592 $target = extract_vm_info
($vmdata, $vmid);
593 $target->{iface
} = $target->{tapdev
};
595 die "unable to parse \"to => '$to'\"\n";
598 $pkg->{source
} = '100.100.1.2' if !defined($pkg->{source
});
599 $pkg->{dest
} = '100.200.3.4' if !defined($pkg->{dest
});
601 my ($res, $ic, $rc) = route_packet
($ruleset, $ipset_ruleset, $pkg,
602 $from_info, $target, $start_state);
604 add_trace
("IPT statistics: invocation = $ic, checks = $rc\n");
606 return $res if $action eq 'QUERY';
608 die "test failed ($res != $action)\n" if $action ne $res;