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Commit | Line | Data |
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b6360c3f DM |
1 | package PVE::Firewall; |
2 | ||
3 | use warnings; | |
4 | use strict; | |
5 | use Data::Dumper; | |
de2a57cd | 6 | use Digest::SHA; |
f789653a | 7 | use PVE::Tools; |
b6360c3f | 8 | use PVE::QemuServer; |
5e1267a5 DM |
9 | use File::Path; |
10 | use IO::File; | |
ecbea048 | 11 | use Net::IP; |
06320eb0 | 12 | use PVE::Tools qw(run_command lock_file); |
ecbea048 | 13 | |
5e1267a5 | 14 | use Data::Dumper; |
b6360c3f | 15 | |
06320eb0 DM |
16 | my $pve_fw_lock_filename = "/var/lock/pvefw.lck"; |
17 | ||
9aab3127 | 18 | my $macros; |
3a616aa0 AD |
19 | my @ruleset = (); |
20 | ||
a332200b DM |
21 | # todo: implement some kind of MACROS, like shorewall /usr/share/shorewall/macro.* |
22 | sub get_firewall_macros { | |
9aab3127 DM |
23 | |
24 | return $macros if $macros; | |
25 | ||
a332200b DM |
26 | #foreach my $path (</usr/share/shorewall/macro.*>) { |
27 | # if ($path =~ m|/macro\.(\S+)$|) { | |
28 | # $macros->{$1} = 1; | |
29 | # } | |
30 | #} | |
31 | ||
32 | $macros = {}; # fixme: implemet me | |
33 | ||
9aab3127 DM |
34 | return $macros; |
35 | } | |
36 | ||
fcba0beb DM |
37 | my $etc_services; |
38 | ||
39 | sub get_etc_services { | |
40 | ||
41 | return $etc_services if $etc_services; | |
42 | ||
43 | my $filename = "/etc/services"; | |
44 | ||
45 | my $fh = IO::File->new($filename, O_RDONLY); | |
46 | if (!$fh) { | |
47 | warn "unable to read '$filename' - $!\n"; | |
48 | return {}; | |
49 | } | |
50 | ||
51 | my $services = {}; | |
52 | ||
53 | while (my $line = <$fh>) { | |
54 | chomp ($line); | |
55 | next if $line =~m/^#/; | |
56 | next if ($line =~m/^\s*$/); | |
57 | ||
58 | if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) { | |
59 | $services->{byid}->{$2}->{name} = $1; | |
60 | $services->{byid}->{$2}->{$3} = 1; | |
61 | $services->{byname}->{$1} = $services->{byid}->{$2}; | |
62 | } | |
63 | } | |
64 | ||
65 | close($fh); | |
66 | ||
67 | $etc_services = $services; | |
68 | ||
3a616aa0 | 69 | |
fcba0beb DM |
70 | return $etc_services; |
71 | } | |
72 | ||
73 | my $etc_protocols; | |
74 | ||
75 | sub get_etc_protocols { | |
76 | return $etc_protocols if $etc_protocols; | |
77 | ||
78 | my $filename = "/etc/protocols"; | |
79 | ||
80 | my $fh = IO::File->new($filename, O_RDONLY); | |
81 | if (!$fh) { | |
82 | warn "unable to read '$filename' - $!\n"; | |
83 | return {}; | |
84 | } | |
85 | ||
86 | my $protocols = {}; | |
87 | ||
88 | while (my $line = <$fh>) { | |
89 | chomp ($line); | |
90 | next if $line =~m/^#/; | |
91 | next if ($line =~m/^\s*$/); | |
92 | ||
93 | if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) { | |
94 | $protocols->{byid}->{$2}->{name} = $1; | |
95 | $protocols->{byname}->{$1} = $protocols->{byid}->{$2}; | |
96 | } | |
97 | } | |
98 | ||
99 | close($fh); | |
100 | ||
101 | $etc_protocols = $protocols; | |
102 | ||
103 | return $etc_protocols; | |
104 | } | |
105 | ||
ecbea048 DM |
106 | sub parse_address_list { |
107 | my ($str) = @_; | |
108 | ||
d6de1dc2 | 109 | my $nbaor = 0; |
ecbea048 DM |
110 | foreach my $aor (split(/,/, $str)) { |
111 | if (!Net::IP->new($aor)) { | |
112 | my $err = Net::IP::Error(); | |
113 | die "invalid IP address: $err\n"; | |
d6de1dc2 AD |
114 | }else{ |
115 | $nbaor++; | |
ecbea048 DM |
116 | } |
117 | } | |
d6de1dc2 | 118 | return $nbaor; |
ecbea048 | 119 | } |
dddd9413 | 120 | |
fcba0beb DM |
121 | sub parse_port_name_number_or_range { |
122 | my ($str) = @_; | |
123 | ||
124 | my $services = PVE::Firewall::get_etc_services(); | |
4cdbb3b7 | 125 | my $nbports = 0; |
fcba0beb | 126 | foreach my $item (split(/,/, $str)) { |
4cdbb3b7 | 127 | my $portlist = ""; |
fcba0beb | 128 | foreach my $pon (split(':', $item, 2)) { |
4cdbb3b7 AD |
129 | if ($pon =~ m/^\d+$/){ |
130 | die "invalid port '$pon'\n" if $pon < 0 && $pon > 65536; | |
131 | }else{ | |
132 | die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon}; | |
133 | } | |
134 | $nbports++; | |
fcba0beb DM |
135 | } |
136 | } | |
137 | ||
4cdbb3b7 | 138 | return ($nbports); |
fcba0beb DM |
139 | } |
140 | ||
8cebfa6f | 141 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; |
dddd9413 | 142 | |
3a616aa0 AD |
143 | sub iptables { |
144 | my ($cmd) = @_; | |
145 | ||
146 | run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {}); | |
147 | } | |
148 | ||
b16e818e DM |
149 | sub iptables_restore_cmdlist { |
150 | my ($cmdlist) = @_; | |
3a616aa0 | 151 | |
64568ce0 DM |
152 | my $verbose = 1; # fixme: how/when do we set this |
153 | ||
154 | #run_command("echo '$cmdlist' | /sbin/iptables-restore -n"); | |
155 | eval { run_command("/sbin/iptables-restore -n ", input => $cmdlist); }; | |
156 | if (my $err = $@) { | |
157 | print STDERR $cmdlist if $verbose; | |
158 | die $err; | |
159 | } | |
3a616aa0 AD |
160 | } |
161 | ||
b16e818e DM |
162 | sub iptables_restore { |
163 | ||
164 | unshift (@ruleset, '*filter'); | |
165 | push (@ruleset, 'COMMIT'); | |
166 | ||
167 | my $cmdlist = join("\n", @ruleset) . "\n"; | |
168 | ||
169 | iptables_restore_cmdlist($cmdlist); | |
170 | } | |
171 | ||
de2a57cd DM |
172 | # experimental code to read existing chains and compute SHA1 checksum |
173 | # for each chain. | |
174 | sub iptables_get_chains { | |
175 | ||
176 | my $res = {}; | |
177 | ||
178 | # check what chains we want to track | |
179 | my $is_pvefw_chain = sub { | |
180 | my $name = shift; | |
181 | ||
182 | return 1 if $name =~ m/^BRIDGEFW-(:?IN|OUT)$/; | |
183 | return 1 if $name =~ m/^proxmoxfw-\S+$/; | |
184 | return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/; | |
b16e818e | 185 | return 1 if $name =~ m/^vmbr\d+-(:?IN|OUT)$/; |
f50656c2 | 186 | return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/; |
1ddbcfaf | 187 | return 1 if $name =~ m/^host-(:?IN|OUT)$/; |
de2a57cd DM |
188 | |
189 | return undef; | |
190 | }; | |
191 | ||
192 | my $table = ''; | |
193 | ||
194 | my $dhash = {}; | |
195 | ||
196 | my $parser = sub { | |
197 | my $line = shift; | |
198 | ||
199 | return if $line =~ m/^#/; | |
200 | return if $line =~ m/^\s*$/; | |
201 | ||
202 | if ($line =~ m/^\*(\S+)$/) { | |
203 | $table = $1; | |
204 | return; | |
205 | } | |
206 | ||
207 | return if $table ne 'filter'; | |
208 | ||
209 | if ($line =~ m/^:(\S+)\s/) { | |
210 | my $chain = $1; | |
211 | return if !&$is_pvefw_chain($chain); | |
212 | $dhash->{$chain} = Digest::SHA->new('sha1'); | |
213 | } elsif ($line =~ m/^-([A-Z]) (\S+)\s/) { | |
214 | my $chain = $2; | |
215 | return if !&$is_pvefw_chain($chain); | |
216 | my $sha = $dhash->{$chain} || die "undefined chain '$chain'"; | |
217 | $sha->add_bits("$line\n"); | |
218 | } else { | |
219 | # simply ignore the rest | |
220 | return; | |
221 | } | |
222 | }; | |
223 | ||
224 | run_command("/sbin/iptables-save", outfunc => $parser); | |
225 | ||
226 | foreach my $chain (keys %$dhash) { | |
227 | my $sha = $dhash->{$chain}; | |
228 | $res->{$chain} = $sha->b64digest; | |
229 | } | |
230 | ||
231 | return $res; | |
232 | } | |
233 | ||
3a616aa0 AD |
234 | sub iptables_addrule { |
235 | my ($rule) = @_; | |
236 | ||
237 | push (@ruleset, $rule); | |
238 | } | |
239 | ||
240 | sub iptables_chain_exist { | |
241 | my ($chain) = @_; | |
242 | ||
243 | eval{ | |
244 | iptables("-n --list $chain"); | |
245 | }; | |
246 | return undef if $@; | |
247 | ||
248 | return 1; | |
249 | } | |
250 | ||
251 | sub iptables_rule_exist { | |
252 | my ($rule) = @_; | |
253 | ||
254 | eval{ | |
255 | iptables("-C $rule"); | |
256 | }; | |
257 | return undef if $@; | |
258 | ||
259 | return 1; | |
260 | } | |
261 | ||
262 | sub iptables_generate_rule { | |
263 | my ($chain, $rule) = @_; | |
264 | ||
265 | my $cmd = "-A $chain"; | |
266 | ||
d6de1dc2 | 267 | $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1; |
3a616aa0 | 268 | $cmd .= " -s $rule->{source}" if $rule->{source}; |
d6de1dc2 | 269 | $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1; |
3a616aa0 AD |
270 | $cmd .= " -d $rule->{dest}" if $rule->{destination}; |
271 | $cmd .= " -p $rule->{proto}" if $rule->{proto}; | |
4cdbb3b7 | 272 | $cmd .= " --match multiport" if $rule->{nbdport} && $rule->{nbdport} > 1; |
3a616aa0 | 273 | $cmd .= " --dport $rule->{dport}" if $rule->{dport}; |
4cdbb3b7 | 274 | $cmd .= " --match multiport" if $rule->{nbsport} && $rule->{nbsport} > 1; |
3a616aa0 AD |
275 | $cmd .= " --sport $rule->{sport}" if $rule->{sport}; |
276 | $cmd .= " -j $rule->{action}" if $rule->{action}; | |
277 | ||
278 | iptables_addrule($cmd); | |
279 | ||
280 | } | |
281 | ||
282 | sub generate_bridge_rules { | |
283 | my ($bridge) = @_; | |
284 | ||
285 | if(!iptables_chain_exist("BRIDGEFW-OUT")){ | |
286 | iptables_addrule(":BRIDGEFW-OUT - [0:0]"); | |
287 | } | |
288 | ||
289 | if(!iptables_chain_exist("BRIDGEFW-IN")){ | |
290 | iptables_addrule(":BRIDGEFW-IN - [0:0]"); | |
291 | } | |
292 | ||
293 | if(!iptables_chain_exist("proxmoxfw-FORWARD")){ | |
294 | iptables_addrule(":proxmoxfw-FORWARD - [0:0]"); | |
295 | iptables_addrule("-I FORWARD -j proxmoxfw-FORWARD"); | |
296 | iptables_addrule("-A proxmoxfw-FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
297 | iptables_addrule("-A proxmoxfw-FORWARD -m physdev --physdev-is-in --physdev-is-bridged -j BRIDGEFW-OUT"); | |
298 | iptables_addrule("-A proxmoxfw-FORWARD -m physdev --physdev-is-out --physdev-is-bridged -j BRIDGEFW-IN"); | |
299 | ||
300 | } | |
301 | ||
302 | generate_proxmoxfwinput(); | |
303 | ||
304 | if(!iptables_chain_exist("$bridge-IN")){ | |
305 | iptables_addrule(":$bridge-IN - [0:0]"); | |
306 | iptables_addrule("-A proxmoxfw-FORWARD -i $bridge -j DROP"); #disable interbridge routing | |
307 | iptables_addrule("-A BRIDGEFW-IN -j $bridge-IN"); | |
308 | iptables_addrule("-A $bridge-IN -j ACCEPT"); | |
309 | ||
310 | } | |
311 | ||
312 | if(!iptables_chain_exist("$bridge-OUT")){ | |
313 | iptables_addrule(":$bridge-OUT - [0:0]"); | |
314 | iptables_addrule("-A proxmoxfw-FORWARD -o $bridge -j DROP"); # disable interbridge routing | |
315 | iptables_addrule("-A BRIDGEFW-OUT -j $bridge-OUT"); | |
316 | ||
317 | } | |
318 | ||
319 | } | |
320 | ||
321 | ||
322 | sub generate_tap_rules_direction { | |
323 | my ($iface, $netid, $rules, $bridge, $direction) = @_; | |
324 | ||
325 | my $tapchain = "$iface-$direction"; | |
326 | ||
327 | iptables_addrule(":$tapchain - [0:0]"); | |
328 | ||
329 | iptables_addrule("-A $tapchain -m state --state INVALID -j DROP"); | |
330 | iptables_addrule("-A $tapchain -m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
331 | ||
332 | if (scalar(@$rules)) { | |
333 | foreach my $rule (@$rules) { | |
334 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
335 | if($rule->{action} =~ m/^(GROUP-(\S+))$/){ | |
336 | $rule->{action} .= "-$direction"; | |
337 | #generate empty group rule if don't exist | |
338 | if(!iptables_chain_exist($rule->{action})){ | |
339 | generate_group_rules($2); | |
340 | } | |
341 | } | |
342 | #we go to vmbr-IN if accept in out rules | |
343 | $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT'; | |
344 | iptables_generate_rule($tapchain, $rule); | |
345 | } | |
346 | } | |
347 | ||
348 | iptables_addrule("-A $tapchain -j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4"); | |
349 | iptables_addrule("-A $tapchain -j DROP"); | |
350 | ||
351 | #plug the tap chain to bridge chain | |
352 | my $physdevdirection = $direction eq 'IN' ? "out":"in"; | |
353 | my $rule = "$bridge-$direction -m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain"; | |
354 | ||
355 | if(!iptables_rule_exist($rule)){ | |
356 | iptables_addrule("-I $rule"); | |
357 | } | |
358 | ||
359 | if($direction eq 'OUT'){ | |
360 | #add tap->host rules | |
361 | my $rule = "proxmoxfw-INPUT -m physdev --physdev-$physdevdirection $iface -j $tapchain"; | |
362 | ||
363 | if(!iptables_rule_exist($rule)){ | |
364 | iptables_addrule("-A $rule"); | |
365 | } | |
366 | } | |
367 | } | |
368 | ||
369 | sub generate_tap_rules { | |
370 | my ($net, $netid, $vmid) = @_; | |
371 | ||
372 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
373 | my $fh = IO::File->new($filename, O_RDONLY); | |
374 | return if !$fh; | |
375 | ||
376 | #generate bridge rules | |
377 | my $bridge = $net->{bridge}; | |
378 | my $tag = $net->{tag}; | |
379 | $bridge .= "v$tag" if $tag; | |
380 | ||
381 | #generate tap chain | |
382 | my $rules = parse_fw_rules($filename, $fh); | |
383 | ||
384 | my $inrules = $rules->{in}; | |
385 | my $outrules = $rules->{out}; | |
386 | ||
387 | my $iface = "tap".$vmid."i".$1 if $netid =~ m/net(\d+)/; | |
388 | ||
389 | generate_bridge_rules($bridge); | |
390 | generate_tap_rules_direction($iface, $netid, $inrules, $bridge, 'IN'); | |
391 | generate_tap_rules_direction($iface, $netid, $outrules, $bridge, 'OUT'); | |
392 | iptables_restore(); | |
393 | } | |
394 | ||
395 | sub flush_tap_rules { | |
396 | my ($net, $netid, $vmid) = @_; | |
397 | ||
398 | my $bridge = $net->{bridge}; | |
399 | my $iface = "tap".$vmid."i".$1 if $netid =~ m/net(\d+)/; | |
400 | ||
401 | flush_tap_rules_direction($iface, $bridge, 'IN'); | |
402 | flush_tap_rules_direction($iface, $bridge, 'OUT'); | |
403 | iptables_restore(); | |
404 | } | |
405 | ||
406 | sub flush_tap_rules_direction { | |
407 | my ($iface, $bridge, $direction) = @_; | |
408 | ||
409 | my $tapchain = "$iface-$direction"; | |
410 | ||
411 | if(iptables_chain_exist($tapchain)){ | |
412 | iptables_addrule("-F $tapchain"); | |
413 | ||
414 | my $physdevdirection = $direction eq 'IN' ? "out":"in"; | |
415 | my $rule = "$bridge-$direction -m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain"; | |
416 | if(iptables_rule_exist($rule)){ | |
417 | iptables_addrule("-D $rule"); | |
418 | } | |
419 | ||
420 | if($direction eq 'OUT'){ | |
421 | my $rule = "proxmoxfw-INPUT -m physdev --physdev-$physdevdirection $iface -j $tapchain"; | |
462a6553 | 422 | if(iptables_rule_exist($rule)){ |
3a616aa0 AD |
423 | iptables_addrule("-D $rule"); |
424 | } | |
425 | } | |
426 | ||
427 | iptables_addrule("-X $tapchain"); | |
428 | } | |
429 | } | |
430 | ||
0bd5f137 AD |
431 | sub enablehostfw { |
432 | ||
433 | generate_proxmoxfwinput(); | |
434 | generate_proxmoxfwoutput(); | |
435 | ||
436 | my $filename = "/etc/pve/local/host.fw"; | |
437 | my $fh = IO::File->new($filename, O_RDONLY); | |
438 | return if !$fh; | |
439 | ||
440 | my $rules = parse_fw_rules($filename, $fh); | |
441 | my $inrules = $rules->{in}; | |
442 | my $outrules = $rules->{out}; | |
443 | ||
444 | #host inbound firewall | |
445 | iptables_addrule(":host-IN - [0:0]"); | |
446 | iptables_addrule("-A host-IN -m state --state INVALID -j DROP"); | |
447 | iptables_addrule("-A host-IN -m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
448 | iptables_addrule("-A host-IN -i lo -j ACCEPT"); | |
449 | iptables_addrule("-A host-IN -m addrtype --dst-type MULTICAST -j ACCEPT"); | |
450 | iptables_addrule("-A host-IN -p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT"); | |
451 | iptables_addrule("-A host-IN -p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
452 | ||
453 | if (scalar(@$inrules)) { | |
454 | foreach my $rule (@$inrules) { | |
455 | #we use RETURN because we need to check also tap rules | |
456 | $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT'; | |
457 | iptables_generate_rule('host-IN', $rule); | |
458 | } | |
459 | } | |
460 | ||
461 | iptables_addrule("-A host-IN -j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4"); | |
462 | iptables_addrule("-A host-IN -j DROP"); | |
463 | ||
464 | #host outbound firewall | |
465 | iptables_addrule(":host-OUT - [0:0]"); | |
466 | iptables_addrule("-A host-OUT -m state --state INVALID -j DROP"); | |
467 | iptables_addrule("-A host-OUT -m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
468 | iptables_addrule("-A host-OUT -o lo -j ACCEPT"); | |
469 | iptables_addrule("-A host-OUT -m addrtype --dst-type MULTICAST -j ACCEPT"); | |
470 | iptables_addrule("-A host-OUT -p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT"); | |
471 | iptables_addrule("-A host-OUT -p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
472 | ||
473 | if (scalar(@$outrules)) { | |
474 | foreach my $rule (@$outrules) { | |
475 | #we use RETURN because we need to check also tap rules | |
476 | $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT'; | |
477 | iptables_generate_rule('host-OUT', $rule); | |
478 | } | |
479 | } | |
480 | ||
481 | iptables_addrule("-A host-OUT -j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4"); | |
482 | iptables_addrule("-A host-OUT -j DROP"); | |
483 | ||
484 | ||
485 | my $rule = "proxmoxfw-INPUT -j host-IN"; | |
486 | if(!iptables_rule_exist($rule)){ | |
487 | iptables_addrule("-I $rule"); | |
488 | } | |
489 | ||
490 | $rule = "proxmoxfw-OUTPUT -j host-OUT"; | |
491 | if(!iptables_rule_exist($rule)){ | |
492 | iptables_addrule("-I $rule"); | |
493 | } | |
494 | ||
495 | iptables_restore(); | |
496 | ||
497 | ||
498 | } | |
499 | ||
500 | sub disablehostfw { | |
501 | ||
502 | my $chain = "host-IN"; | |
503 | ||
504 | my $rule = "proxmoxfw-INPUT -j $chain"; | |
505 | if(iptables_rule_exist($rule)){ | |
506 | iptables_addrule("-D $rule"); | |
507 | } | |
508 | ||
509 | if(iptables_chain_exist($chain)){ | |
510 | iptables_addrule("-F $chain"); | |
511 | iptables_addrule("-X $chain"); | |
512 | } | |
513 | ||
514 | $chain = "host-OUT"; | |
515 | ||
516 | $rule = "proxmoxfw-OUTPUT -j $chain"; | |
517 | if(iptables_rule_exist($rule)){ | |
518 | iptables_addrule("-D $rule"); | |
519 | } | |
520 | ||
521 | if(iptables_chain_exist($chain)){ | |
522 | iptables_addrule("-F $chain"); | |
523 | iptables_addrule("-X $chain"); | |
524 | } | |
525 | ||
526 | iptables_restore(); | |
527 | } | |
528 | ||
529 | sub generate_proxmoxfwinput { | |
530 | ||
531 | if(!iptables_chain_exist("proxmoxfw-INPUT")){ | |
532 | iptables_addrule(":proxmoxfw-INPUT - [0:0]"); | |
533 | iptables_addrule("-I INPUT -j proxmoxfw-INPUT"); | |
534 | iptables_addrule("-A INPUT -j ACCEPT"); | |
535 | } | |
536 | } | |
537 | ||
538 | sub generate_proxmoxfwoutput { | |
539 | ||
540 | if(!iptables_chain_exist("proxmoxfw-OUTPUT")){ | |
541 | iptables_addrule(":proxmoxfw-OUTPUT - [0:0]"); | |
542 | iptables_addrule("-I OUTPUT -j proxmoxfw-OUTPUT"); | |
543 | iptables_addrule("-A OUTPUT -j ACCEPT"); | |
544 | } | |
545 | ||
546 | } | |
547 | ||
9d31b418 AD |
548 | sub enable_group_rules { |
549 | my ($group) = @_; | |
550 | ||
551 | generate_group_rules($group); | |
552 | iptables_restore(); | |
553 | } | |
554 | ||
555 | sub generate_group_rules { | |
556 | my ($group) = @_; | |
557 | ||
558 | my $filename = "/etc/pve/firewall/groups.fw"; | |
559 | my $fh = IO::File->new($filename, O_RDONLY); | |
560 | return if !$fh; | |
561 | ||
562 | my $rules = parse_fw_rules($filename, $fh, $group); | |
563 | my $inrules = $rules->{in}; | |
564 | my $outrules = $rules->{out}; | |
565 | ||
566 | my $chain = "GROUP-".$group."-IN"; | |
567 | ||
568 | iptables_addrule(":$chain - [0:0]"); | |
569 | ||
570 | if (scalar(@$inrules)) { | |
571 | foreach my $rule (@$inrules) { | |
572 | iptables_generate_rule($chain, $rule); | |
573 | } | |
574 | } | |
575 | ||
576 | $chain = "GROUP-".$group."-OUT"; | |
577 | ||
578 | iptables_addrule(":$chain - [0:0]"); | |
579 | ||
580 | if(!iptables_chain_exist("BRIDGEFW-OUT")){ | |
581 | iptables_addrule(":BRIDGEFW-OUT - [0:0]"); | |
582 | } | |
583 | ||
584 | if(!iptables_chain_exist("BRIDGEFW-IN")){ | |
585 | iptables_addrule(":BRIDGEFW-IN - [0:0]"); | |
586 | } | |
587 | ||
588 | if (scalar(@$outrules)) { | |
589 | foreach my $rule (@$outrules) { | |
590 | #we go the BRIDGEFW-IN because we need to check also other tap rules | |
591 | #(and group rules can be set on any bridge, so we can't go to VMBRXX-IN) | |
592 | $rule->{action} = 'BRIDGEFW-IN' if $rule->{action} eq 'ACCEPT'; | |
593 | iptables_generate_rule($chain, $rule); | |
594 | } | |
595 | } | |
596 | ||
597 | } | |
598 | ||
599 | sub disable_group_rules { | |
600 | my ($group) = @_; | |
601 | ||
602 | my $chain = "GROUP-".$group."-IN"; | |
603 | ||
604 | if(iptables_chain_exist($chain)){ | |
605 | iptables_addrule("-F $chain"); | |
606 | iptables_addrule("-X $chain"); | |
607 | } | |
608 | ||
609 | $chain = "GROUP-".$group."-OUT"; | |
610 | ||
611 | if(iptables_chain_exist($chain)){ | |
612 | iptables_addrule("-F $chain"); | |
613 | iptables_addrule("-X $chain"); | |
614 | } | |
615 | ||
616 | #iptables_restore will die if security group is linked in a tap chain | |
617 | #maybe can we improve that, parsing each vm config, or parsing iptables -S | |
618 | #to see if the security group is linked or not | |
619 | iptables_restore(); | |
620 | } | |
621 | ||
5e1267a5 | 622 | sub parse_fw_rules { |
9d31b418 | 623 | my ($filename, $fh, $group) = @_; |
5e1267a5 DM |
624 | |
625 | my $section; | |
9d31b418 AD |
626 | my $securitygroup; |
627 | my $securitygroupexist; | |
5e1267a5 DM |
628 | |
629 | my $res = { in => [], out => [] }; | |
630 | ||
a332200b | 631 | my $macros = get_firewall_macros(); |
fcba0beb DM |
632 | my $protocols = get_etc_protocols(); |
633 | ||
5e1267a5 DM |
634 | while (defined(my $line = <$fh>)) { |
635 | next if $line =~ m/^#/; | |
636 | next if $line =~ m/^\s*$/; | |
637 | ||
9d31b418 | 638 | if ($line =~ m/^\[(in|out)(:(\S+))?\]\s*$/i) { |
5e1267a5 | 639 | $section = lc($1); |
9d31b418 AD |
640 | $securitygroup = lc($3) if $3; |
641 | $securitygroupexist = 1 if $securitygroup && $securitygroup eq $group; | |
5e1267a5 DM |
642 | next; |
643 | } | |
644 | next if !$section; | |
9d31b418 | 645 | next if $group && $securitygroup ne $group; |
5e1267a5 DM |
646 | |
647 | my ($action, $iface, $source, $dest, $proto, $dport, $sport) = | |
648 | split(/\s+/, $line); | |
649 | ||
650 | if (!$action) { | |
651 | warn "skip incomplete line\n"; | |
652 | next; | |
653 | } | |
654 | ||
655 | my $service; | |
3a616aa0 | 656 | if ($action =~ m/^(ACCEPT|DROP|REJECT|GROUP-(\S+))$/) { |
5e1267a5 DM |
657 | # OK |
658 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
659 | ($service, $action) = ($1, $2); | |
660 | if (!$macros->{$service}) { | |
661 | warn "unknown service '$service'\n"; | |
662 | next; | |
663 | } | |
664 | } else { | |
665 | warn "unknown action '$action'\n"; | |
666 | next; | |
667 | } | |
668 | ||
669 | $iface = undef if $iface && $iface eq '-'; | |
670 | if ($iface && $iface !~ m/^(net0|net1|net2|net3|net4|net5)$/) { | |
671 | warn "unknown interface '$iface'\n"; | |
672 | next; | |
673 | } | |
674 | ||
675 | $proto = undef if $proto && $proto eq '-'; | |
fcba0beb DM |
676 | if ($proto && !(defined($protocols->{byname}->{$proto}) || |
677 | defined($protocols->{byid}->{$proto}))) { | |
5e1267a5 DM |
678 | warn "unknown protokol '$proto'\n"; |
679 | next; | |
680 | } | |
681 | ||
682 | $source = undef if $source && $source eq '-'; | |
5e1267a5 | 683 | $dest = undef if $dest && $dest eq '-'; |
5e1267a5 DM |
684 | |
685 | $dport = undef if $dport && $dport eq '-'; | |
686 | $sport = undef if $sport && $sport eq '-'; | |
4cdbb3b7 AD |
687 | my $nbdport = undef; |
688 | my $nbsport = undef; | |
d6de1dc2 AD |
689 | my $nbsource = undef; |
690 | my $nbdest = undef; | |
5e1267a5 | 691 | |
ecbea048 | 692 | eval { |
d6de1dc2 AD |
693 | $nbsource = parse_address_list($source) if $source; |
694 | $nbdest = parse_address_list($dest) if $dest; | |
4cdbb3b7 AD |
695 | $nbdport = parse_port_name_number_or_range($dport) if $dport; |
696 | $nbsport = parse_port_name_number_or_range($sport) if $sport; | |
ecbea048 DM |
697 | }; |
698 | if (my $err = $@) { | |
699 | warn $err; | |
700 | next; | |
701 | ||
702 | } | |
703 | ||
704 | ||
5e1267a5 DM |
705 | my $rule = { |
706 | action => $action, | |
707 | service => $service, | |
708 | iface => $iface, | |
709 | source => $source, | |
710 | dest => $dest, | |
d6de1dc2 AD |
711 | nbsource => $nbsource, |
712 | nbdest => $nbdest, | |
5e1267a5 DM |
713 | proto => $proto, |
714 | dport => $dport, | |
715 | sport => $sport, | |
4cdbb3b7 AD |
716 | nbdport => $nbdport, |
717 | nbsport => $nbsport, | |
718 | ||
5e1267a5 DM |
719 | }; |
720 | ||
721 | push @{$res->{$section}}, $rule; | |
722 | } | |
723 | ||
9d31b418 | 724 | die "security group $group don't exist" if $group && !$securitygroupexist; |
5e1267a5 DM |
725 | return $res; |
726 | } | |
727 | ||
06320eb0 DM |
728 | sub run_locked { |
729 | my ($code, @param) = @_; | |
730 | ||
731 | my $timeout = 10; | |
732 | ||
733 | my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param); | |
734 | ||
735 | die $@ if $@; | |
736 | ||
737 | return $res; | |
738 | } | |
739 | ||
5e1267a5 DM |
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) { | |
b9b06789 | 749 | #next if !($vmid eq '100' || $vmid eq '102'); |
5e1267a5 DM |
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 { | |
5e1267a5 DM |
776 | my $vmdata = read_local_vm_config(); |
777 | my $rules = read_vm_firewall_rules($vmdata); | |
778 | ||
779 | # print Dumper($vmdata); | |
780 | ||
a332200b | 781 | die "implement me"; |
b6360c3f DM |
782 | } |
783 | ||
5e1267a5 DM |
784 | sub compile_and_start { |
785 | my ($restart) = @_; | |
886aba9c | 786 | |
5e1267a5 | 787 | compile(); |
b6360c3f | 788 | |
a332200b | 789 | die "implement me"; |
b6360c3f DM |
790 | } |
791 | ||
b6360c3f | 792 | 1; |