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1 | package PVE::Firewall; | |
2 | ||
3 | use warnings; | |
4 | use strict; | |
5 | use Data::Dumper; | |
6 | use PVE::Tools; | |
7 | use PVE::QemuServer; | |
8 | use File::Path; | |
9 | use IO::File; | |
10 | use Net::IP; | |
11 | use PVE::Tools qw(run_command); | |
12 | ||
13 | use Data::Dumper; | |
14 | ||
15 | my $macros; | |
16 | my @ruleset = (); | |
17 | ||
18 | sub get_shorewall_macros { | |
19 | ||
20 | return $macros if $macros; | |
21 | ||
22 | foreach my $path (</usr/share/shorewall/macro.*>) { | |
23 | if ($path =~ m|/macro\.(\S+)$|) { | |
24 | $macros->{$1} = 1; | |
25 | } | |
26 | } | |
27 | return $macros; | |
28 | } | |
29 | ||
30 | my $etc_services; | |
31 | ||
32 | sub get_etc_services { | |
33 | ||
34 | return $etc_services if $etc_services; | |
35 | ||
36 | my $filename = "/etc/services"; | |
37 | ||
38 | my $fh = IO::File->new($filename, O_RDONLY); | |
39 | if (!$fh) { | |
40 | warn "unable to read '$filename' - $!\n"; | |
41 | return {}; | |
42 | } | |
43 | ||
44 | my $services = {}; | |
45 | ||
46 | while (my $line = <$fh>) { | |
47 | chomp ($line); | |
48 | next if $line =~m/^#/; | |
49 | next if ($line =~m/^\s*$/); | |
50 | ||
51 | if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) { | |
52 | $services->{byid}->{$2}->{name} = $1; | |
53 | $services->{byid}->{$2}->{$3} = 1; | |
54 | $services->{byname}->{$1} = $services->{byid}->{$2}; | |
55 | } | |
56 | } | |
57 | ||
58 | close($fh); | |
59 | ||
60 | $etc_services = $services; | |
61 | ||
62 | ||
63 | return $etc_services; | |
64 | } | |
65 | ||
66 | my $etc_protocols; | |
67 | ||
68 | sub get_etc_protocols { | |
69 | return $etc_protocols if $etc_protocols; | |
70 | ||
71 | my $filename = "/etc/protocols"; | |
72 | ||
73 | my $fh = IO::File->new($filename, O_RDONLY); | |
74 | if (!$fh) { | |
75 | warn "unable to read '$filename' - $!\n"; | |
76 | return {}; | |
77 | } | |
78 | ||
79 | my $protocols = {}; | |
80 | ||
81 | while (my $line = <$fh>) { | |
82 | chomp ($line); | |
83 | next if $line =~m/^#/; | |
84 | next if ($line =~m/^\s*$/); | |
85 | ||
86 | if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) { | |
87 | $protocols->{byid}->{$2}->{name} = $1; | |
88 | $protocols->{byname}->{$1} = $protocols->{byid}->{$2}; | |
89 | } | |
90 | } | |
91 | ||
92 | close($fh); | |
93 | ||
94 | $etc_protocols = $protocols; | |
95 | ||
96 | return $etc_protocols; | |
97 | } | |
98 | ||
99 | sub parse_address_list { | |
100 | my ($str) = @_; | |
101 | ||
102 | foreach my $aor (split(/,/, $str)) { | |
103 | if (!Net::IP->new($aor)) { | |
104 | my $err = Net::IP::Error(); | |
105 | die "invalid IP address: $err\n"; | |
106 | } | |
107 | } | |
108 | } | |
109 | ||
110 | sub parse_port_name_number_or_range { | |
111 | my ($str) = @_; | |
112 | ||
113 | my $services = PVE::Firewall::get_etc_services(); | |
114 | ||
115 | foreach my $item (split(/,/, $str)) { | |
116 | foreach my $pon (split(':', $item, 2)) { | |
117 | next if $pon =~ m/^\d+$/ && $pon > 0 && $pon < 65536; | |
118 | next if defined($services->{byname}->{$pon}); | |
119 | die "invalid port '$pon'\n"; | |
120 | } | |
121 | } | |
122 | ||
123 | } | |
124 | ||
125 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; | |
126 | ||
127 | sub iptables { | |
128 | my ($cmd) = @_; | |
129 | ||
130 | run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {}); | |
131 | } | |
132 | ||
133 | sub iptables_restore { | |
134 | ||
135 | unshift (@ruleset, '*filter'); | |
136 | push (@ruleset, 'COMMIT'); | |
137 | ||
138 | my $cmdlist = join("\n", @ruleset); | |
139 | ||
140 | run_command("echo '$cmdlist' | /sbin/iptables-restore -n", outfunc => sub {}); | |
141 | } | |
142 | ||
143 | sub iptables_addrule { | |
144 | my ($rule) = @_; | |
145 | ||
146 | push (@ruleset, $rule); | |
147 | } | |
148 | ||
149 | sub iptables_chain_exist { | |
150 | my ($chain) = @_; | |
151 | ||
152 | eval{ | |
153 | iptables("-n --list $chain"); | |
154 | }; | |
155 | return undef if $@; | |
156 | ||
157 | return 1; | |
158 | } | |
159 | ||
160 | sub iptables_rule_exist { | |
161 | my ($rule) = @_; | |
162 | ||
163 | eval{ | |
164 | iptables("-C $rule"); | |
165 | }; | |
166 | return undef if $@; | |
167 | ||
168 | return 1; | |
169 | } | |
170 | ||
171 | sub iptables_generate_rule { | |
172 | my ($chain, $rule) = @_; | |
173 | ||
174 | my $cmd = "-A $chain"; | |
175 | ||
176 | $cmd .= " -s $rule->{source}" if $rule->{source}; | |
177 | $cmd .= " -d $rule->{dest}" if $rule->{destination}; | |
178 | $cmd .= " -p $rule->{proto}" if $rule->{proto}; | |
179 | $cmd .= " --dport $rule->{dport}" if $rule->{dport}; | |
180 | $cmd .= " --sport $rule->{sport}" if $rule->{sport}; | |
181 | $cmd .= " -j $rule->{action}" if $rule->{action}; | |
182 | ||
183 | iptables_addrule($cmd); | |
184 | ||
185 | } | |
186 | ||
187 | sub generate_bridge_rules { | |
188 | my ($bridge) = @_; | |
189 | ||
190 | if(!iptables_chain_exist("BRIDGEFW-OUT")){ | |
191 | iptables_addrule(":BRIDGEFW-OUT - [0:0]"); | |
192 | } | |
193 | ||
194 | if(!iptables_chain_exist("BRIDGEFW-IN")){ | |
195 | iptables_addrule(":BRIDGEFW-IN - [0:0]"); | |
196 | } | |
197 | ||
198 | if(!iptables_chain_exist("proxmoxfw-FORWARD")){ | |
199 | iptables_addrule(":proxmoxfw-FORWARD - [0:0]"); | |
200 | iptables_addrule("-I FORWARD -j proxmoxfw-FORWARD"); | |
201 | iptables_addrule("-A proxmoxfw-FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
202 | iptables_addrule("-A proxmoxfw-FORWARD -m physdev --physdev-is-in --physdev-is-bridged -j BRIDGEFW-OUT"); | |
203 | iptables_addrule("-A proxmoxfw-FORWARD -m physdev --physdev-is-out --physdev-is-bridged -j BRIDGEFW-IN"); | |
204 | ||
205 | } | |
206 | ||
207 | generate_proxmoxfwinput(); | |
208 | ||
209 | if(!iptables_chain_exist("$bridge-IN")){ | |
210 | iptables_addrule(":$bridge-IN - [0:0]"); | |
211 | iptables_addrule("-A proxmoxfw-FORWARD -i $bridge -j DROP"); #disable interbridge routing | |
212 | iptables_addrule("-A BRIDGEFW-IN -j $bridge-IN"); | |
213 | iptables_addrule("-A $bridge-IN -j ACCEPT"); | |
214 | ||
215 | } | |
216 | ||
217 | if(!iptables_chain_exist("$bridge-OUT")){ | |
218 | iptables_addrule(":$bridge-OUT - [0:0]"); | |
219 | iptables_addrule("-A proxmoxfw-FORWARD -o $bridge -j DROP"); # disable interbridge routing | |
220 | iptables_addrule("-A BRIDGEFW-OUT -j $bridge-OUT"); | |
221 | ||
222 | } | |
223 | ||
224 | } | |
225 | ||
226 | ||
227 | sub generate_tap_rules_direction { | |
228 | my ($iface, $netid, $rules, $bridge, $direction) = @_; | |
229 | ||
230 | my $tapchain = "$iface-$direction"; | |
231 | ||
232 | iptables_addrule(":$tapchain - [0:0]"); | |
233 | ||
234 | iptables_addrule("-A $tapchain -m state --state INVALID -j DROP"); | |
235 | iptables_addrule("-A $tapchain -m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
236 | ||
237 | if (scalar(@$rules)) { | |
238 | foreach my $rule (@$rules) { | |
239 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
240 | if($rule->{action} =~ m/^(GROUP-(\S+))$/){ | |
241 | $rule->{action} .= "-$direction"; | |
242 | #generate empty group rule if don't exist | |
243 | if(!iptables_chain_exist($rule->{action})){ | |
244 | generate_group_rules($2); | |
245 | } | |
246 | } | |
247 | #we go to vmbr-IN if accept in out rules | |
248 | $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT'; | |
249 | iptables_generate_rule($tapchain, $rule); | |
250 | } | |
251 | } | |
252 | ||
253 | iptables_addrule("-A $tapchain -j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4"); | |
254 | iptables_addrule("-A $tapchain -j DROP"); | |
255 | ||
256 | #plug the tap chain to bridge chain | |
257 | my $physdevdirection = $direction eq 'IN' ? "out":"in"; | |
258 | my $rule = "$bridge-$direction -m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain"; | |
259 | ||
260 | if(!iptables_rule_exist($rule)){ | |
261 | iptables_addrule("-I $rule"); | |
262 | } | |
263 | ||
264 | if($direction eq 'OUT'){ | |
265 | #add tap->host rules | |
266 | my $rule = "proxmoxfw-INPUT -m physdev --physdev-$physdevdirection $iface -j $tapchain"; | |
267 | ||
268 | if(!iptables_rule_exist($rule)){ | |
269 | iptables_addrule("-A $rule"); | |
270 | } | |
271 | } | |
272 | } | |
273 | ||
274 | sub generate_tap_rules { | |
275 | my ($net, $netid, $vmid) = @_; | |
276 | ||
277 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
278 | my $fh = IO::File->new($filename, O_RDONLY); | |
279 | return if !$fh; | |
280 | ||
281 | #generate bridge rules | |
282 | my $bridge = $net->{bridge}; | |
283 | my $tag = $net->{tag}; | |
284 | $bridge .= "v$tag" if $tag; | |
285 | ||
286 | #generate tap chain | |
287 | my $rules = parse_fw_rules($filename, $fh); | |
288 | ||
289 | my $inrules = $rules->{in}; | |
290 | my $outrules = $rules->{out}; | |
291 | ||
292 | my $iface = "tap".$vmid."i".$1 if $netid =~ m/net(\d+)/; | |
293 | ||
294 | generate_bridge_rules($bridge); | |
295 | generate_tap_rules_direction($iface, $netid, $inrules, $bridge, 'IN'); | |
296 | generate_tap_rules_direction($iface, $netid, $outrules, $bridge, 'OUT'); | |
297 | iptables_restore(); | |
298 | } | |
299 | ||
300 | sub flush_tap_rules { | |
301 | my ($net, $netid, $vmid) = @_; | |
302 | ||
303 | my $bridge = $net->{bridge}; | |
304 | my $iface = "tap".$vmid."i".$1 if $netid =~ m/net(\d+)/; | |
305 | ||
306 | flush_tap_rules_direction($iface, $bridge, 'IN'); | |
307 | flush_tap_rules_direction($iface, $bridge, 'OUT'); | |
308 | iptables_restore(); | |
309 | } | |
310 | ||
311 | sub flush_tap_rules_direction { | |
312 | my ($iface, $bridge, $direction) = @_; | |
313 | ||
314 | my $tapchain = "$iface-$direction"; | |
315 | ||
316 | if(iptables_chain_exist($tapchain)){ | |
317 | iptables_addrule("-F $tapchain"); | |
318 | ||
319 | my $physdevdirection = $direction eq 'IN' ? "out":"in"; | |
320 | my $rule = "$bridge-$direction -m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain"; | |
321 | if(iptables_rule_exist($rule)){ | |
322 | iptables_addrule("-D $rule"); | |
323 | } | |
324 | ||
325 | if($direction eq 'OUT'){ | |
326 | my $rule = "proxmoxfw-INPUT -m physdev --physdev-$physdevdirection $iface -j $tapchain"; | |
327 | ||
328 | if(!iptables_rule_exist($rule)){ | |
329 | iptables_addrule("-D $rule"); | |
330 | } | |
331 | } | |
332 | ||
333 | iptables_addrule("-X $tapchain"); | |
334 | } | |
335 | } | |
336 | ||
337 | my $generate_input_rule = sub { | |
338 | my ($zoneinfo, $rule, $net, $netid) = @_; | |
339 | ||
340 | my $zone = $net->{zone} || die "internal error"; | |
341 | my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error"; | |
342 | my $tap = $net->{tap} || die "internal error"; | |
343 | ||
344 | my $dest = "$zid:$tap"; | |
345 | ||
346 | if ($rule->{dest}) { | |
347 | $dest .= ":$rule->{dest}"; | |
348 | } | |
349 | ||
350 | my $action = $rule->{service} ? | |
351 | "$rule->{service}($rule->{action})" : $rule->{action}; | |
352 | ||
353 | my $sources = []; | |
354 | ||
355 | if (!$rule->{source}) { | |
356 | push @$sources, 'all'; | |
357 | } elsif ($zoneinfo->{$zone}->{type} eq 'bport') { | |
358 | my $bridge_zone = $zoneinfo->{$zone}->{bridge_zone} || die "internal error"; | |
359 | my $zoneref = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error"; | |
360 | ||
361 | # using 'all' does not work, so we create one rule for | |
362 | # each related zone on the same bridge | |
363 | push @$sources, "${zoneref}:$rule->{source}"; | |
364 | foreach my $z (keys %$zoneinfo) { | |
365 | next if $z eq $zone; | |
366 | next if !$zoneinfo->{$z}->{bridge_zone}; | |
367 | next if $zoneinfo->{$z}->{bridge_zone} ne $bridge_zone; | |
368 | $zoneref = $zoneinfo->{$z}->{zoneref} || die "internal error"; | |
369 | push @$sources, "${zoneref}:$rule->{source}"; | |
370 | } | |
371 | } else { | |
372 | push @$sources, "all:$rule->{source}"; | |
373 | } | |
374 | ||
375 | my $out = ''; | |
376 | ||
377 | foreach my $source (@$sources) { | |
378 | $out .= sprintf($rule_format, $action, $source, $dest, $rule->{proto} || '-', | |
379 | $rule->{dport} || '-', $rule->{sport} || '-'); | |
380 | } | |
381 | ||
382 | return $out; | |
383 | }; | |
384 | ||
385 | my $generate_output_rule = sub { | |
386 | my ($zoneinfo, $rule, $net, $netid) = @_; | |
387 | ||
388 | my $zone = $net->{zone} || die "internal error"; | |
389 | my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error"; | |
390 | my $tap = $net->{tap} || die "internal error"; | |
391 | ||
392 | my $action = $rule->{service} ? | |
393 | "$rule->{service}($rule->{action})" : $rule->{action}; | |
394 | ||
395 | my $dest; | |
396 | ||
397 | if (!$rule->{dest}) { | |
398 | $dest = 'all'; | |
399 | } else { | |
400 | $dest = "all:$rule->{dest}"; | |
401 | } | |
402 | ||
403 | return sprintf($rule_format, $action, "$zid:$tap", $dest, | |
404 | $rule->{proto} || '-', $rule->{dport} || '-', $rule->{sport} || '-'); | |
405 | }; | |
406 | ||
407 | # we need complete VM configuration of all VMs (openvz/qemu) | |
408 | # in vmdata | |
409 | ||
410 | my $compile_shorewall = sub { | |
411 | my ($targetdir, $vmdata, $rules) = @_; | |
412 | ||
413 | # remove existing data ? | |
414 | foreach my $file (qw(params zones rules interfaces maclist policy)) { | |
415 | unlink "$targetdir/$file"; | |
416 | } | |
417 | ||
418 | my $netinfo; | |
419 | ||
420 | my $zoneinfo = { | |
421 | fw => { type => 'firewall' }, | |
422 | }; | |
423 | ||
424 | my $maclist = {}; | |
425 | ||
426 | my $register_bridge; | |
427 | ||
428 | $register_bridge = sub { | |
429 | my ($bridge, $vlan) = @_; | |
430 | ||
431 | my $zone = $bridge; | |
432 | ||
433 | return $zone if $zoneinfo->{$zone}; | |
434 | ||
435 | my $ext_zone = "${bridge}_ext"; | |
436 | ||
437 | $zoneinfo->{$zone} = { | |
438 | type => 'bridge', | |
439 | bridge => $bridge, | |
440 | bridge_ext_zone => $ext_zone, | |
441 | }; | |
442 | ||
443 | # physical input devices | |
444 | my $dir = "/sys/class/net/$bridge/brif"; | |
445 | my $physical = {}; | |
446 | PVE::Tools::dir_glob_foreach($dir, '((eth|bond).+)', sub { | |
447 | my ($slave) = @_; | |
448 | $physical->{$slave} = 1; | |
449 | }); | |
450 | ||
451 | $zoneinfo->{$ext_zone} = { | |
452 | type => 'bport', | |
453 | bridge_zone => $zone, | |
454 | ifaces => $physical, | |
455 | }; | |
456 | ||
457 | return &$register_bridge("${bridge}v${vlan}") if defined($vlan); | |
458 | ||
459 | return $zone; | |
460 | }; | |
461 | ||
462 | my $register_bridge_port = sub { | |
463 | my ($bridge, $vlan, $vmzone, $tap) = @_; | |
464 | ||
465 | my $bridge_zone = &$register_bridge($bridge, $vlan); | |
466 | my $zone = $bridge_zone . '_' . $vmzone; | |
467 | ||
468 | if (!$zoneinfo->{$zone}) { | |
469 | $zoneinfo->{$zone} = { | |
470 | type => 'bport', | |
471 | bridge_zone => $bridge_zone, | |
472 | ifaces => {}, | |
473 | }; | |
474 | } | |
475 | ||
476 | $zoneinfo->{$zone}->{ifaces}->{$tap} = 1; | |
477 | ||
478 | return $zone; | |
479 | }; | |
480 | ||
481 | foreach my $vmid (keys %{$vmdata->{qemu}}) { | |
482 | $netinfo->{$vmid} = {}; | |
483 | my $conf = $vmdata->{qemu}->{$vmid}; | |
484 | foreach my $opt (keys %$conf) { | |
485 | next if $opt !~ m/^net(\d+)$/; | |
486 | my $netnum = $1; | |
487 | my $net = PVE::QemuServer::parse_net($conf->{$opt}); | |
488 | next if !$net; | |
489 | die "implement me" if !$net->{bridge}; | |
490 | ||
491 | my $vmzone = $conf->{zone} || "vm$vmid"; | |
492 | $net->{tap} = "tap${vmid}i${netnum}"; | |
493 | $maclist->{$net->{tap}} = $net->{macaddr} || die "internal error"; | |
494 | $net->{zone} = &$register_bridge_port($net->{bridge}, $net->{tag}, $vmzone, $net->{tap}); | |
495 | $netinfo->{$vmid}->{$opt} = $net; | |
496 | } | |
497 | } | |
498 | ||
499 | #print Dumper($netinfo); | |
500 | ||
501 | # NOTE: zone names have length limit, so we need to | |
502 | # translate them into shorter names | |
503 | ||
504 | my $zoneid = 0; | |
505 | my $zonemap = { fw => 'fw' }; | |
506 | ||
507 | my $lookup_zonename = sub { | |
508 | my ($zone) = @_; | |
509 | ||
510 | return $zonemap->{$zone} if defined($zonemap->{$zone}); | |
511 | $zonemap->{$zone} = 'z' . $zoneid++; | |
512 | ||
513 | return $zonemap->{$zone}; | |
514 | }; | |
515 | ||
516 | foreach my $z (sort keys %$zoneinfo) { | |
517 | $zoneinfo->{$z}->{id} = &$lookup_zonename($z); | |
518 | $zoneinfo->{$z}->{zonevar} = uc($z); | |
519 | $zoneinfo->{$z}->{zoneref} = '$' . $zoneinfo->{$z}->{zonevar}; | |
520 | } | |
521 | ||
522 | my $out; | |
523 | ||
524 | # dump params file | |
525 | $out = "# PVE zones\n"; | |
526 | foreach my $z (sort keys %$zoneinfo) { | |
527 | $out .= "$zoneinfo->{$z}->{zonevar}=$zoneinfo->{$z}->{id}\n"; | |
528 | } | |
529 | PVE::Tools::file_set_contents("$targetdir/params", $out); | |
530 | ||
531 | # dump zone file | |
532 | ||
533 | my $format = "%-30s %-10s %-15s\n"; | |
534 | $out = sprintf($format, '#ZONE', 'TYPE', 'OPTIONS'); | |
535 | ||
536 | foreach my $z (sort keys %$zoneinfo) { | |
537 | my $zid = $zoneinfo->{$z}->{zoneref}; | |
538 | if ($zoneinfo->{$z}->{type} eq 'firewall') { | |
539 | $out .= sprintf($format, $zid, $zoneinfo->{$z}->{type}, ''); | |
540 | } elsif ($zoneinfo->{$z}->{type} eq 'bridge') { | |
541 | $out .= sprintf($format, $zid, 'ipv4', ''); | |
542 | } elsif ($zoneinfo->{$z}->{type} eq 'bport') { | |
543 | my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error"; | |
544 | my $bzid = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error"; | |
545 | $out .= sprintf($format, "$zid:$bzid", 'bport', ''); | |
546 | } else { | |
547 | die "internal error"; | |
548 | } | |
549 | } | |
550 | ||
551 | $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n"); | |
552 | ||
553 | PVE::Tools::file_set_contents("$targetdir/zones", $out); | |
554 | ||
555 | # dump interfaces | |
556 | ||
557 | $format = "%-25s %-20s %-10s %-15s\n"; | |
558 | $out = sprintf($format, '#ZONE', 'INTERFACE', 'BROADCAST', 'OPTIONS'); | |
559 | ||
560 | my $maclist_format = "%-15s %-15s %-15s\n"; | |
561 | my $macs = sprintf($maclist_format, '#DISPOSITION', 'INTERFACE', 'MACZONE'); | |
562 | ||
563 | foreach my $z (sort keys %$zoneinfo) { | |
564 | my $zid = $zoneinfo->{$z}->{zoneref}; | |
565 | if ($zoneinfo->{$z}->{type} eq 'firewall') { | |
566 | # do nothing; | |
567 | } elsif ($zoneinfo->{$z}->{type} eq 'bridge') { | |
568 | my $bridge = $zoneinfo->{$z}->{bridge} || die "internal error"; | |
569 | $out .= sprintf($format, $zid, $bridge, 'detect', 'bridge,optional'); | |
570 | } elsif ($zoneinfo->{$z}->{type} eq 'bport') { | |
571 | my $ifaces = $zoneinfo->{$z}->{ifaces}; | |
572 | foreach my $iface (sort keys %$ifaces) { | |
573 | my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error"; | |
574 | my $bridge = $zoneinfo->{$bridge_zone}->{bridge} || die "internal error"; | |
575 | my $iftxt = "$bridge:$iface"; | |
576 | ||
577 | if ($maclist->{$iface}) { | |
578 | $out .= sprintf($format, $zid, $iftxt, '-', 'maclist'); | |
579 | $macs .= sprintf($maclist_format, 'ACCEPT', $iface, $maclist->{$iface}); | |
580 | } else { | |
581 | $out .= sprintf($format, $zid, $iftxt, '-', ''); | |
582 | } | |
583 | } | |
584 | } else { | |
585 | die "internal error"; | |
586 | } | |
587 | } | |
588 | ||
589 | $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n"); | |
590 | ||
591 | PVE::Tools::file_set_contents("$targetdir/interfaces", $out); | |
592 | ||
593 | # dump maclist | |
594 | PVE::Tools::file_set_contents("$targetdir/maclist", $macs); | |
595 | ||
596 | # dump policy | |
597 | ||
598 | $format = "%-15s %-15s %-15s %s\n"; | |
599 | $out = sprintf($format, '#SOURCE', 'DEST', 'POLICY', 'LOG'); | |
600 | $out .= sprintf($format, 'fw', 'all', 'ACCEPT', ''); | |
601 | ||
602 | # we need to disable intra-zone traffic on bridges. Else traffic | |
603 | # from untracked interfaces simply pass the firewall | |
604 | foreach my $z (sort keys %$zoneinfo) { | |
605 | my $zid = $zoneinfo->{$z}->{zoneref}; | |
606 | if ($zoneinfo->{$z}->{type} eq 'bridge') { | |
607 | $out .= sprintf($format, $zid, $zid, 'REJECT', 'info'); | |
608 | } | |
609 | } | |
610 | $out .= sprintf($format, 'all', 'all', 'REJECT', 'info'); | |
611 | ||
612 | PVE::Tools::file_set_contents("$targetdir/policy", $out); | |
613 | ||
614 | # dump rules | |
615 | $out = ''; | |
616 | ||
617 | $out = sprintf($rule_format, '#ACTION', 'SOURCE', 'DEST', 'PROTO', 'DPORT', 'SPORT'); | |
618 | foreach my $vmid (sort keys %$rules) { | |
619 | my $inrules = $rules->{$vmid}->{in}; | |
620 | my $outrules = $rules->{$vmid}->{out}; | |
621 | ||
622 | if (scalar(@$inrules)) { | |
623 | $out .= "# IN to VM $vmid\n"; | |
624 | foreach my $rule (@$inrules) { | |
625 | foreach my $netid (keys %{$netinfo->{$vmid}}) { | |
626 | my $net = $netinfo->{$vmid}->{$netid}; | |
627 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
628 | $out .= &$generate_input_rule($zoneinfo, $rule, $net, $netid); | |
629 | } | |
630 | } | |
631 | } | |
632 | ||
633 | if (scalar(@$outrules)) { | |
634 | $out .= "# OUT from VM $vmid\n"; | |
635 | foreach my $rule (@$outrules) { | |
636 | foreach my $netid (keys %{$netinfo->{$vmid}}) { | |
637 | my $net = $netinfo->{$vmid}->{$netid}; | |
638 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
639 | $out .= &$generate_output_rule($zoneinfo, $rule, $net, $netid); | |
640 | } | |
641 | } | |
642 | } | |
643 | } | |
644 | ||
645 | PVE::Tools::file_set_contents("$targetdir/rules", $out); | |
646 | }; | |
647 | ||
648 | ||
649 | sub parse_fw_rules { | |
650 | my ($filename, $fh) = @_; | |
651 | ||
652 | my $section; | |
653 | ||
654 | my $res = { in => [], out => [] }; | |
655 | ||
656 | my $macros = get_shorewall_macros(); | |
657 | my $protocols = get_etc_protocols(); | |
658 | ||
659 | while (defined(my $line = <$fh>)) { | |
660 | next if $line =~ m/^#/; | |
661 | next if $line =~ m/^\s*$/; | |
662 | ||
663 | if ($line =~ m/^\[(in|out)\]\s*$/i) { | |
664 | $section = lc($1); | |
665 | next; | |
666 | } | |
667 | next if !$section; | |
668 | ||
669 | my ($action, $iface, $source, $dest, $proto, $dport, $sport) = | |
670 | split(/\s+/, $line); | |
671 | ||
672 | if (!$action) { | |
673 | warn "skip incomplete line\n"; | |
674 | next; | |
675 | } | |
676 | ||
677 | my $service; | |
678 | if ($action =~ m/^(ACCEPT|DROP|REJECT|GROUP-(\S+))$/) { | |
679 | # OK | |
680 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
681 | ($service, $action) = ($1, $2); | |
682 | if (!$macros->{$service}) { | |
683 | warn "unknown service '$service'\n"; | |
684 | next; | |
685 | } | |
686 | } else { | |
687 | warn "unknown action '$action'\n"; | |
688 | next; | |
689 | } | |
690 | ||
691 | $iface = undef if $iface && $iface eq '-'; | |
692 | if ($iface && $iface !~ m/^(net0|net1|net2|net3|net4|net5)$/) { | |
693 | warn "unknown interface '$iface'\n"; | |
694 | next; | |
695 | } | |
696 | ||
697 | $proto = undef if $proto && $proto eq '-'; | |
698 | if ($proto && !(defined($protocols->{byname}->{$proto}) || | |
699 | defined($protocols->{byid}->{$proto}))) { | |
700 | warn "unknown protokol '$proto'\n"; | |
701 | next; | |
702 | } | |
703 | ||
704 | $source = undef if $source && $source eq '-'; | |
705 | $dest = undef if $dest && $dest eq '-'; | |
706 | ||
707 | $dport = undef if $dport && $dport eq '-'; | |
708 | $sport = undef if $sport && $sport eq '-'; | |
709 | ||
710 | eval { | |
711 | parse_address_list($source) if $source; | |
712 | parse_address_list($dest) if $dest; | |
713 | parse_port_name_number_or_range($dport) if $dport; | |
714 | parse_port_name_number_or_range($sport) if $sport; | |
715 | }; | |
716 | if (my $err = $@) { | |
717 | warn $err; | |
718 | next; | |
719 | ||
720 | } | |
721 | ||
722 | ||
723 | my $rule = { | |
724 | action => $action, | |
725 | service => $service, | |
726 | iface => $iface, | |
727 | source => $source, | |
728 | dest => $dest, | |
729 | proto => $proto, | |
730 | dport => $dport, | |
731 | sport => $sport, | |
732 | }; | |
733 | ||
734 | push @{$res->{$section}}, $rule; | |
735 | } | |
736 | ||
737 | return $res; | |
738 | } | |
739 | ||
740 | sub read_local_vm_config { | |
741 | ||
742 | my $openvz = {}; | |
743 | ||
744 | my $qemu = {}; | |
745 | ||
746 | my $list = PVE::QemuServer::config_list(); | |
747 | ||
748 | foreach my $vmid (keys %$list) { | |
749 | #next if !($vmid eq '100' || $vmid eq '102'); | |
750 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); | |
751 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
752 | $qemu->{$vmid} = $conf; | |
753 | } | |
754 | } | |
755 | ||
756 | my $vmdata = { openvz => $openvz, qemu => $qemu }; | |
757 | ||
758 | return $vmdata; | |
759 | }; | |
760 | ||
761 | sub read_vm_firewall_rules { | |
762 | my ($vmdata) = @_; | |
763 | my $rules = {}; | |
764 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { | |
765 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
766 | my $fh = IO::File->new($filename, O_RDONLY); | |
767 | next if !$fh; | |
768 | ||
769 | $rules->{$vmid} = parse_fw_rules($filename, $fh); | |
770 | } | |
771 | ||
772 | return $rules; | |
773 | } | |
774 | ||
775 | sub compile { | |
776 | ||
777 | my $vmdata = read_local_vm_config(); | |
778 | my $rules = read_vm_firewall_rules($vmdata); | |
779 | ||
780 | # print Dumper($vmdata); | |
781 | ||
782 | my $swdir = '/etc/shorewall'; | |
783 | mkdir $swdir; | |
784 | ||
785 | &$compile_shorewall($swdir, $vmdata, $rules); | |
786 | ||
787 | PVE::Tools::run_command(['shorewall', 'compile']); | |
788 | } | |
789 | ||
790 | sub compile_and_start { | |
791 | my ($restart) = @_; | |
792 | ||
793 | compile(); | |
794 | ||
795 | PVE::Tools::run_command(['shorewall', $restart ? 'restart' : 'start']); | |
796 | } | |
797 | ||
798 | ||
799 | 1; |