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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; | |
3fa83edf | 6 | use Digest::MD5; |
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 | 19 | |
a332200b DM |
20 | # todo: implement some kind of MACROS, like shorewall /usr/share/shorewall/macro.* |
21 | sub get_firewall_macros { | |
9aab3127 DM |
22 | |
23 | return $macros if $macros; | |
24 | ||
a332200b DM |
25 | #foreach my $path (</usr/share/shorewall/macro.*>) { |
26 | # if ($path =~ m|/macro\.(\S+)$|) { | |
27 | # $macros->{$1} = 1; | |
28 | # } | |
29 | #} | |
30 | ||
31 | $macros = {}; # fixme: implemet me | |
32 | ||
9aab3127 DM |
33 | return $macros; |
34 | } | |
35 | ||
fcba0beb DM |
36 | my $etc_services; |
37 | ||
38 | sub get_etc_services { | |
39 | ||
40 | return $etc_services if $etc_services; | |
41 | ||
42 | my $filename = "/etc/services"; | |
43 | ||
44 | my $fh = IO::File->new($filename, O_RDONLY); | |
45 | if (!$fh) { | |
46 | warn "unable to read '$filename' - $!\n"; | |
47 | return {}; | |
48 | } | |
49 | ||
50 | my $services = {}; | |
51 | ||
52 | while (my $line = <$fh>) { | |
53 | chomp ($line); | |
54 | next if $line =~m/^#/; | |
55 | next if ($line =~m/^\s*$/); | |
56 | ||
57 | if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) { | |
58 | $services->{byid}->{$2}->{name} = $1; | |
59 | $services->{byid}->{$2}->{$3} = 1; | |
60 | $services->{byname}->{$1} = $services->{byid}->{$2}; | |
61 | } | |
62 | } | |
63 | ||
64 | close($fh); | |
65 | ||
66 | $etc_services = $services; | |
67 | ||
3a616aa0 | 68 | |
fcba0beb DM |
69 | return $etc_services; |
70 | } | |
71 | ||
72 | my $etc_protocols; | |
73 | ||
74 | sub get_etc_protocols { | |
75 | return $etc_protocols if $etc_protocols; | |
76 | ||
77 | my $filename = "/etc/protocols"; | |
78 | ||
79 | my $fh = IO::File->new($filename, O_RDONLY); | |
80 | if (!$fh) { | |
81 | warn "unable to read '$filename' - $!\n"; | |
82 | return {}; | |
83 | } | |
84 | ||
85 | my $protocols = {}; | |
86 | ||
87 | while (my $line = <$fh>) { | |
88 | chomp ($line); | |
89 | next if $line =~m/^#/; | |
90 | next if ($line =~m/^\s*$/); | |
91 | ||
92 | if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) { | |
93 | $protocols->{byid}->{$2}->{name} = $1; | |
94 | $protocols->{byname}->{$1} = $protocols->{byid}->{$2}; | |
95 | } | |
96 | } | |
97 | ||
98 | close($fh); | |
99 | ||
100 | $etc_protocols = $protocols; | |
101 | ||
102 | return $etc_protocols; | |
103 | } | |
104 | ||
ecbea048 DM |
105 | sub parse_address_list { |
106 | my ($str) = @_; | |
107 | ||
d6de1dc2 | 108 | my $nbaor = 0; |
ecbea048 DM |
109 | foreach my $aor (split(/,/, $str)) { |
110 | if (!Net::IP->new($aor)) { | |
111 | my $err = Net::IP::Error(); | |
112 | die "invalid IP address: $err\n"; | |
d6de1dc2 AD |
113 | }else{ |
114 | $nbaor++; | |
ecbea048 DM |
115 | } |
116 | } | |
d6de1dc2 | 117 | return $nbaor; |
ecbea048 | 118 | } |
dddd9413 | 119 | |
fcba0beb DM |
120 | sub parse_port_name_number_or_range { |
121 | my ($str) = @_; | |
122 | ||
123 | my $services = PVE::Firewall::get_etc_services(); | |
4cdbb3b7 | 124 | my $nbports = 0; |
fcba0beb | 125 | foreach my $item (split(/,/, $str)) { |
4cdbb3b7 | 126 | my $portlist = ""; |
fcba0beb | 127 | foreach my $pon (split(':', $item, 2)) { |
4cdbb3b7 AD |
128 | if ($pon =~ m/^\d+$/){ |
129 | die "invalid port '$pon'\n" if $pon < 0 && $pon > 65536; | |
130 | }else{ | |
131 | die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon}; | |
132 | } | |
133 | $nbports++; | |
fcba0beb DM |
134 | } |
135 | } | |
136 | ||
4cdbb3b7 | 137 | return ($nbports); |
fcba0beb DM |
138 | } |
139 | ||
8cebfa6f | 140 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; |
dddd9413 | 141 | |
3a616aa0 AD |
142 | sub iptables { |
143 | my ($cmd) = @_; | |
144 | ||
145 | run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {}); | |
146 | } | |
147 | ||
b16e818e DM |
148 | sub iptables_restore_cmdlist { |
149 | my ($cmdlist) = @_; | |
3a616aa0 | 150 | |
3fa83edf | 151 | run_command("/sbin/iptables-restore -n", input => $cmdlist); |
3a616aa0 AD |
152 | } |
153 | ||
de2a57cd DM |
154 | sub iptables_get_chains { |
155 | ||
156 | my $res = {}; | |
157 | ||
158 | # check what chains we want to track | |
159 | my $is_pvefw_chain = sub { | |
160 | my $name = shift; | |
161 | ||
dec84fcd DM |
162 | return 1 if $name =~ m/^PVEFW-\S+$/; |
163 | ||
de2a57cd | 164 | return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/; |
b16e818e | 165 | return 1 if $name =~ m/^vmbr\d+-(:?IN|OUT)$/; |
f50656c2 | 166 | return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/; |
de2a57cd DM |
167 | |
168 | return undef; | |
169 | }; | |
170 | ||
171 | my $table = ''; | |
172 | ||
de2a57cd DM |
173 | my $parser = sub { |
174 | my $line = shift; | |
175 | ||
176 | return if $line =~ m/^#/; | |
177 | return if $line =~ m/^\s*$/; | |
178 | ||
179 | if ($line =~ m/^\*(\S+)$/) { | |
180 | $table = $1; | |
181 | return; | |
182 | } | |
183 | ||
184 | return if $table ne 'filter'; | |
185 | ||
186 | if ($line =~ m/^:(\S+)\s/) { | |
187 | my $chain = $1; | |
188 | return if !&$is_pvefw_chain($chain); | |
3fa83edf DM |
189 | $res->{$chain} = "unknown"; |
190 | } elsif ($line =~ m/^-A\s+(\S+)\s.*--log-prefix\s+\"PVESIG:(\S+)\"/) { | |
191 | my ($chain, $sig) = ($1, $2); | |
de2a57cd | 192 | return if !&$is_pvefw_chain($chain); |
3fa83edf | 193 | $res->{$chain} = $sig; |
de2a57cd DM |
194 | } else { |
195 | # simply ignore the rest | |
196 | return; | |
197 | } | |
198 | }; | |
199 | ||
200 | run_command("/sbin/iptables-save", outfunc => $parser); | |
201 | ||
de2a57cd DM |
202 | return $res; |
203 | } | |
204 | ||
3a616aa0 AD |
205 | sub iptables_chain_exist { |
206 | my ($chain) = @_; | |
207 | ||
208 | eval{ | |
209 | iptables("-n --list $chain"); | |
210 | }; | |
211 | return undef if $@; | |
212 | ||
213 | return 1; | |
214 | } | |
215 | ||
216 | sub iptables_rule_exist { | |
217 | my ($rule) = @_; | |
218 | ||
219 | eval{ | |
220 | iptables("-C $rule"); | |
221 | }; | |
222 | return undef if $@; | |
223 | ||
224 | return 1; | |
225 | } | |
226 | ||
3fa83edf DM |
227 | sub ruleset_generate_rule { |
228 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 229 | |
3fa83edf | 230 | my $cmd = ''; |
3a616aa0 | 231 | |
d6de1dc2 | 232 | $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1; |
3a616aa0 | 233 | $cmd .= " -s $rule->{source}" if $rule->{source}; |
d6de1dc2 | 234 | $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1; |
3a616aa0 AD |
235 | $cmd .= " -d $rule->{dest}" if $rule->{destination}; |
236 | $cmd .= " -p $rule->{proto}" if $rule->{proto}; | |
4cdbb3b7 | 237 | $cmd .= " --match multiport" if $rule->{nbdport} && $rule->{nbdport} > 1; |
3a616aa0 | 238 | $cmd .= " --dport $rule->{dport}" if $rule->{dport}; |
4cdbb3b7 | 239 | $cmd .= " --match multiport" if $rule->{nbsport} && $rule->{nbsport} > 1; |
3a616aa0 AD |
240 | $cmd .= " --sport $rule->{sport}" if $rule->{sport}; |
241 | $cmd .= " -j $rule->{action}" if $rule->{action}; | |
242 | ||
3fa83edf DM |
243 | ruleset_addrule($ruleset, $chain, $cmd) if $cmd; |
244 | } | |
245 | ||
246 | sub ruleset_create_chain { | |
247 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 248 | |
3fa83edf DM |
249 | die "chain '$chain' already exists\n" if $ruleset->{$chain}; |
250 | ||
251 | $ruleset->{$chain} = []; | |
3a616aa0 AD |
252 | } |
253 | ||
3fa83edf DM |
254 | sub ruleset_chain_exist { |
255 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 256 | |
3fa83edf DM |
257 | return $ruleset->{$chain} ? 1 : undef; |
258 | } | |
3a616aa0 | 259 | |
3fa83edf DM |
260 | sub ruleset_addrule { |
261 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 262 | |
3fa83edf | 263 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 264 | |
3fa83edf DM |
265 | push @{$ruleset->{$chain}}, "-A $chain $rule"; |
266 | } | |
3a616aa0 | 267 | |
3fa83edf DM |
268 | sub ruleset_insertrule { |
269 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 270 | |
3fa83edf | 271 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 272 | |
3fa83edf DM |
273 | unshift @{$ruleset->{$chain}}, "-A $chain $rule"; |
274 | } | |
3a616aa0 | 275 | |
3fa83edf DM |
276 | sub generate_bridge_chains { |
277 | my ($ruleset, $bridge) = @_; | |
3a616aa0 | 278 | |
dec84fcd DM |
279 | if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-IN")){ |
280 | ruleset_create_chain($ruleset, "PVEFW-BRIDGE-IN"); | |
d4d0fd1d AD |
281 | } |
282 | ||
dec84fcd DM |
283 | if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-OUT")){ |
284 | ruleset_create_chain($ruleset, "PVEFW-BRIDGE-OUT"); | |
d4d0fd1d | 285 | } |
3fa83edf | 286 | |
dec84fcd DM |
287 | if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){ |
288 | ruleset_create_chain($ruleset, "PVEFW-FORWARD"); | |
3fa83edf | 289 | |
dec84fcd DM |
290 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m state --state RELATED,ESTABLISHED -j ACCEPT"); |
291 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-in --physdev-is-bridged -j PVEFW-BRIDGE-OUT"); | |
292 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-out --physdev-is-bridged -j PVEFW-BRIDGE-IN"); | |
3a616aa0 AD |
293 | } |
294 | ||
3fa83edf DM |
295 | if (!ruleset_chain_exist($ruleset, "$bridge-IN")) { |
296 | ruleset_create_chain($ruleset, "$bridge-IN"); | |
dec84fcd DM |
297 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing |
298 | ruleset_addrule($ruleset, "PVEFW-BRIDGE-IN", "-j $bridge-IN"); | |
3fa83edf DM |
299 | ruleset_addrule($ruleset, "$bridge-IN", "-j ACCEPT"); |
300 | } | |
3a616aa0 | 301 | |
3fa83edf DM |
302 | if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) { |
303 | ruleset_create_chain($ruleset, "$bridge-OUT"); | |
dec84fcd DM |
304 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing |
305 | ruleset_addrule($ruleset, "PVEFW-BRIDGE-OUT", "-j $bridge-OUT"); | |
3fa83edf DM |
306 | } |
307 | } | |
3a616aa0 AD |
308 | |
309 | sub generate_tap_rules_direction { | |
3fa83edf | 310 | my ($ruleset, $iface, $netid, $rules, $bridge, $direction) = @_; |
3a616aa0 AD |
311 | |
312 | my $tapchain = "$iface-$direction"; | |
313 | ||
3fa83edf | 314 | ruleset_create_chain($ruleset, $tapchain); |
3a616aa0 | 315 | |
3fa83edf DM |
316 | ruleset_addrule($ruleset, $tapchain, "-m state --state INVALID -j DROP"); |
317 | ruleset_addrule($ruleset, $tapchain, "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
3a616aa0 | 318 | |
3fa83edf | 319 | if ($rules) { |
3a616aa0 AD |
320 | foreach my $rule (@$rules) { |
321 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
322 | if($rule->{action} =~ m/^(GROUP-(\S+))$/){ | |
3fa83edf DM |
323 | $rule->{action} .= "-$direction"; |
324 | # generate empty group rule if don't exist | |
325 | if(!ruleset_chain_exist($ruleset, $rule->{action})){ | |
326 | generate_group_rules($ruleset, $2); | |
327 | } | |
3a616aa0 | 328 | } |
3fa83edf | 329 | # we go to vmbr-IN if accept in out rules |
3a616aa0 | 330 | $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT'; |
3fa83edf | 331 | ruleset_generate_rule($ruleset, $tapchain, $rule); |
3a616aa0 AD |
332 | } |
333 | } | |
334 | ||
3fa83edf DM |
335 | ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4"); |
336 | ruleset_addrule($ruleset, $tapchain, "-j DROP"); | |
3a616aa0 | 337 | |
3fa83edf DM |
338 | # plug the tap chain to bridge chain |
339 | my $physdevdirection = $direction eq 'IN' ? "out" : "in"; | |
340 | my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain"; | |
341 | ruleset_insertrule($ruleset, "$bridge-$direction", $rule); | |
3a616aa0 | 342 | |
3fa83edf DM |
343 | if ($direction eq 'OUT'){ |
344 | # add tap->host rules | |
345 | my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain"; | |
dec84fcd | 346 | ruleset_addrule($ruleset, "PVEFW-INPUT", $rule); |
3a616aa0 AD |
347 | } |
348 | } | |
349 | ||
0bd5f137 | 350 | sub enablehostfw { |
3fa83edf | 351 | my ($ruleset) = @_; |
0bd5f137 AD |
352 | |
353 | my $filename = "/etc/pve/local/host.fw"; | |
354 | my $fh = IO::File->new($filename, O_RDONLY); | |
355 | return if !$fh; | |
356 | ||
357 | my $rules = parse_fw_rules($filename, $fh); | |
0bd5f137 | 358 | |
3fa83edf | 359 | # host inbound firewall |
dec84fcd DM |
360 | my $chain = "PVEFW-HOST-IN"; |
361 | ruleset_create_chain($ruleset, $chain); | |
0bd5f137 | 362 | |
dec84fcd DM |
363 | ruleset_addrule($ruleset, $chain, "-m state --state INVALID -j DROP"); |
364 | ruleset_addrule($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
365 | ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT"); | |
366 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
367 | ruleset_addrule($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT"); | |
368 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
0bd5f137 | 369 | |
3fa83edf DM |
370 | if ($rules->{in}) { |
371 | foreach my $rule (@{$rules->{in}}) { | |
372 | # we use RETURN because we need to check also tap rules | |
373 | $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT'; | |
dec84fcd | 374 | ruleset_generate_rule($ruleset, $chain, $rule); |
3fa83edf | 375 | } |
0bd5f137 AD |
376 | } |
377 | ||
dec84fcd DM |
378 | ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4"); |
379 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
0bd5f137 | 380 | |
3fa83edf | 381 | # host outbound firewall |
dec84fcd DM |
382 | my $chain = "PVEFW-HOST-OUT"; |
383 | ruleset_create_chain($ruleset, $chain); | |
384 | ||
385 | ruleset_addrule($ruleset, $chain, "-m state --state INVALID -j DROP"); | |
386 | ruleset_addrule($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
387 | ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT"); | |
388 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
389 | ruleset_addrule($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT"); | |
390 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
0bd5f137 | 391 | |
3fa83edf DM |
392 | if ($rules->{out}) { |
393 | foreach my $rule (@{$rules->{out}}) { | |
394 | # we use RETURN because we need to check also tap rules | |
395 | $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT'; | |
dec84fcd | 396 | ruleset_generate_rule($ruleset, $chain, $rule); |
3fa83edf | 397 | } |
0bd5f137 AD |
398 | } |
399 | ||
dec84fcd DM |
400 | ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4"); |
401 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
9d31b418 | 402 | |
dec84fcd DM |
403 | ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT"); |
404 | ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN"); | |
9d31b418 AD |
405 | } |
406 | ||
407 | sub generate_group_rules { | |
3fa83edf | 408 | my ($ruleset, $group) = @_; |
9d31b418 AD |
409 | |
410 | my $filename = "/etc/pve/firewall/groups.fw"; | |
411 | my $fh = IO::File->new($filename, O_RDONLY); | |
412 | return if !$fh; | |
413 | ||
414 | my $rules = parse_fw_rules($filename, $fh, $group); | |
9d31b418 | 415 | |
3fa83edf | 416 | my $chain = "GROUP-${group}-IN"; |
9d31b418 | 417 | |
3fa83edf | 418 | ruleset_create_chain($ruleset, $chain); |
9d31b418 | 419 | |
3fa83edf DM |
420 | if ($rules->{in}) { |
421 | foreach my $rule (@{$rules->{in}}) { | |
422 | ruleset_generate_rule($ruleset, $chain, $rule); | |
9d31b418 AD |
423 | } |
424 | } | |
425 | ||
3fa83edf | 426 | $chain = "GROUP-${group}-OUT"; |
9d31b418 | 427 | |
3fa83edf | 428 | ruleset_create_chain($ruleset, $chain); |
9d31b418 | 429 | |
3fa83edf DM |
430 | if ($rules->{out}) { |
431 | foreach my $rule (@{$rules->{out}}) { | |
dec84fcd | 432 | # we go the PVEFW-BRIDGE-IN because we need to check also other tap rules |
3fa83edf | 433 | # (and group rules can be set on any bridge, so we can't go to VMBRXX-IN) |
dec84fcd | 434 | $rule->{action} = 'PVEFW-BRIDGE-IN' if $rule->{action} eq 'ACCEPT'; |
3fa83edf | 435 | ruleset_generate_rule($rule, $chain, $rule); |
9d31b418 AD |
436 | } |
437 | } | |
9d31b418 AD |
438 | } |
439 | ||
5e1267a5 | 440 | sub parse_fw_rules { |
9d31b418 | 441 | my ($filename, $fh, $group) = @_; |
5e1267a5 DM |
442 | |
443 | my $section; | |
9d31b418 AD |
444 | my $securitygroup; |
445 | my $securitygroupexist; | |
5e1267a5 DM |
446 | |
447 | my $res = { in => [], out => [] }; | |
448 | ||
a332200b | 449 | my $macros = get_firewall_macros(); |
fcba0beb DM |
450 | my $protocols = get_etc_protocols(); |
451 | ||
5e1267a5 DM |
452 | while (defined(my $line = <$fh>)) { |
453 | next if $line =~ m/^#/; | |
454 | next if $line =~ m/^\s*$/; | |
455 | ||
9d31b418 | 456 | if ($line =~ m/^\[(in|out)(:(\S+))?\]\s*$/i) { |
5e1267a5 | 457 | $section = lc($1); |
9d31b418 AD |
458 | $securitygroup = lc($3) if $3; |
459 | $securitygroupexist = 1 if $securitygroup && $securitygroup eq $group; | |
5e1267a5 DM |
460 | next; |
461 | } | |
462 | next if !$section; | |
9d31b418 | 463 | next if $group && $securitygroup ne $group; |
5e1267a5 DM |
464 | |
465 | my ($action, $iface, $source, $dest, $proto, $dport, $sport) = | |
466 | split(/\s+/, $line); | |
467 | ||
468 | if (!$action) { | |
469 | warn "skip incomplete line\n"; | |
470 | next; | |
471 | } | |
472 | ||
473 | my $service; | |
3a616aa0 | 474 | if ($action =~ m/^(ACCEPT|DROP|REJECT|GROUP-(\S+))$/) { |
5e1267a5 DM |
475 | # OK |
476 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
477 | ($service, $action) = ($1, $2); | |
478 | if (!$macros->{$service}) { | |
479 | warn "unknown service '$service'\n"; | |
480 | next; | |
481 | } | |
482 | } else { | |
483 | warn "unknown action '$action'\n"; | |
484 | next; | |
485 | } | |
486 | ||
487 | $iface = undef if $iface && $iface eq '-'; | |
488 | if ($iface && $iface !~ m/^(net0|net1|net2|net3|net4|net5)$/) { | |
489 | warn "unknown interface '$iface'\n"; | |
490 | next; | |
491 | } | |
492 | ||
493 | $proto = undef if $proto && $proto eq '-'; | |
fcba0beb DM |
494 | if ($proto && !(defined($protocols->{byname}->{$proto}) || |
495 | defined($protocols->{byid}->{$proto}))) { | |
5e1267a5 DM |
496 | warn "unknown protokol '$proto'\n"; |
497 | next; | |
498 | } | |
499 | ||
500 | $source = undef if $source && $source eq '-'; | |
5e1267a5 | 501 | $dest = undef if $dest && $dest eq '-'; |
5e1267a5 DM |
502 | |
503 | $dport = undef if $dport && $dport eq '-'; | |
504 | $sport = undef if $sport && $sport eq '-'; | |
4cdbb3b7 AD |
505 | my $nbdport = undef; |
506 | my $nbsport = undef; | |
d6de1dc2 AD |
507 | my $nbsource = undef; |
508 | my $nbdest = undef; | |
5e1267a5 | 509 | |
ecbea048 | 510 | eval { |
d6de1dc2 AD |
511 | $nbsource = parse_address_list($source) if $source; |
512 | $nbdest = parse_address_list($dest) if $dest; | |
4cdbb3b7 AD |
513 | $nbdport = parse_port_name_number_or_range($dport) if $dport; |
514 | $nbsport = parse_port_name_number_or_range($sport) if $sport; | |
ecbea048 DM |
515 | }; |
516 | if (my $err = $@) { | |
517 | warn $err; | |
518 | next; | |
519 | ||
520 | } | |
521 | ||
522 | ||
5e1267a5 DM |
523 | my $rule = { |
524 | action => $action, | |
525 | service => $service, | |
526 | iface => $iface, | |
527 | source => $source, | |
528 | dest => $dest, | |
d6de1dc2 AD |
529 | nbsource => $nbsource, |
530 | nbdest => $nbdest, | |
5e1267a5 DM |
531 | proto => $proto, |
532 | dport => $dport, | |
533 | sport => $sport, | |
4cdbb3b7 AD |
534 | nbdport => $nbdport, |
535 | nbsport => $nbsport, | |
536 | ||
5e1267a5 DM |
537 | }; |
538 | ||
539 | push @{$res->{$section}}, $rule; | |
540 | } | |
541 | ||
9d31b418 | 542 | die "security group $group don't exist" if $group && !$securitygroupexist; |
5e1267a5 DM |
543 | return $res; |
544 | } | |
545 | ||
06320eb0 DM |
546 | sub run_locked { |
547 | my ($code, @param) = @_; | |
548 | ||
549 | my $timeout = 10; | |
550 | ||
551 | my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param); | |
552 | ||
553 | die $@ if $@; | |
554 | ||
555 | return $res; | |
556 | } | |
557 | ||
5e1267a5 DM |
558 | sub read_local_vm_config { |
559 | ||
560 | my $openvz = {}; | |
561 | ||
562 | my $qemu = {}; | |
563 | ||
564 | my $list = PVE::QemuServer::config_list(); | |
565 | ||
566 | foreach my $vmid (keys %$list) { | |
5e1267a5 DM |
567 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); |
568 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
569 | $qemu->{$vmid} = $conf; | |
570 | } | |
571 | } | |
572 | ||
573 | my $vmdata = { openvz => $openvz, qemu => $qemu }; | |
574 | ||
575 | return $vmdata; | |
576 | }; | |
577 | ||
578 | sub read_vm_firewall_rules { | |
579 | my ($vmdata) = @_; | |
580 | my $rules = {}; | |
581 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { | |
582 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
583 | my $fh = IO::File->new($filename, O_RDONLY); | |
584 | next if !$fh; | |
585 | ||
586 | $rules->{$vmid} = parse_fw_rules($filename, $fh); | |
587 | } | |
588 | ||
589 | return $rules; | |
590 | } | |
591 | ||
592 | sub compile { | |
5e1267a5 DM |
593 | my $vmdata = read_local_vm_config(); |
594 | my $rules = read_vm_firewall_rules($vmdata); | |
595 | ||
3fa83edf DM |
596 | #print Dumper($rules); |
597 | ||
598 | my $ruleset = {}; | |
599 | ||
600 | # setup host firewall rules | |
dec84fcd DM |
601 | ruleset_create_chain($ruleset, "PVEFW-INPUT"); |
602 | ruleset_create_chain($ruleset, "PVEFW-OUTPUT"); | |
3fa83edf DM |
603 | |
604 | enablehostfw($ruleset); | |
605 | ||
606 | # generate firewall rules for QEMU VMs | |
607 | foreach my $vmid (keys %{$vmdata->{qemu}}) { | |
608 | my $conf = $vmdata->{qemu}->{$vmid}; | |
609 | next if !$rules->{$vmid}; | |
610 | ||
611 | foreach my $netid (keys %$conf) { | |
612 | next if $netid !~ m/^net(\d+)$/; | |
613 | my $net = PVE::QemuServer::parse_net($conf->{$netid}); | |
614 | next if !$net; | |
615 | my $iface = "tap${vmid}i$1"; | |
5e1267a5 | 616 | |
3fa83edf DM |
617 | my $bridge = $net->{bridge}; |
618 | next if !$bridge; # fixme: ? | |
619 | ||
620 | $bridge .= "v$net->{tag}" if $net->{tag}; | |
621 | ||
622 | generate_bridge_chains($ruleset, $bridge); | |
623 | ||
624 | generate_tap_rules_direction($ruleset, $iface, $netid, $rules->{$vmid}->{in}, $bridge, 'IN'); | |
625 | generate_tap_rules_direction($ruleset, $iface, $netid, $rules->{$vmid}->{out}, $bridge, 'OUT'); | |
626 | } | |
627 | } | |
3fa83edf DM |
628 | return $ruleset; |
629 | } | |
630 | ||
631 | sub get_ruleset_status { | |
632 | my ($ruleset, $verbose) = @_; | |
633 | ||
634 | my $active_chains = iptables_get_chains(); | |
635 | ||
636 | my $statushash = {}; | |
637 | ||
638 | foreach my $chain (sort keys %$ruleset) { | |
639 | my $digest = Digest::MD5->new(); | |
640 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
641 | $digest->add("$cmd\n"); | |
642 | } | |
643 | my $sig = $digest->b64digest; | |
644 | $statushash->{$chain}->{sig} = $sig; | |
645 | ||
646 | my $oldsig = $active_chains->{$chain}; | |
647 | if (!defined($oldsig)) { | |
648 | $statushash->{$chain}->{action} = 'create'; | |
649 | } else { | |
650 | if ($oldsig eq $sig) { | |
651 | $statushash->{$chain}->{action} = 'exists'; | |
652 | } else { | |
653 | $statushash->{$chain}->{action} = 'update'; | |
654 | } | |
655 | } | |
656 | print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose; | |
657 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
658 | print "\t$cmd\n" if $verbose; | |
659 | } | |
660 | } | |
661 | ||
662 | foreach my $chain (sort keys %$active_chains) { | |
663 | if (!defined($ruleset->{$chain})) { | |
664 | my $sig = $active_chains->{$chain}; | |
665 | $statushash->{$chain}->{action} = 'delete'; | |
666 | $statushash->{$chain}->{sig} = $sig; | |
667 | print "delete $chain ($sig)\n" if $verbose; | |
668 | } | |
669 | } | |
670 | ||
671 | return $statushash; | |
672 | } | |
673 | ||
674 | sub print_ruleset { | |
675 | my ($ruleset) = @_; | |
676 | ||
677 | get_ruleset_status($ruleset, 1); | |
678 | } | |
679 | ||
680 | sub print_sig_rule { | |
681 | my ($chain, $sig) = @_; | |
682 | ||
683 | # Note: This rule should never match! We just use this hack to store a SHA1 checksum | |
684 | # used to detect changes | |
685 | return "-A $chain -j LOG --log-prefix \"PVESIG:$sig\" -p tcp -s \"127.128.129.130\" --dport 1\n"; | |
b6360c3f DM |
686 | } |
687 | ||
5e1267a5 | 688 | sub compile_and_start { |
3fa83edf DM |
689 | my ($verbose) = @_; |
690 | ||
691 | my $ruleset = compile(); | |
692 | ||
693 | my $cmdlist = "*filter\n"; # we pass this to iptables-restore; | |
694 | ||
695 | my $statushash = get_ruleset_status($ruleset, $verbose); | |
696 | ||
697 | # create missing chains first | |
698 | foreach my $chain (sort keys %$ruleset) { | |
699 | my $stat = $statushash->{$chain}; | |
700 | die "internal error" if !$stat; | |
701 | next if $stat->{action} ne 'create'; | |
886aba9c | 702 | |
3fa83edf DM |
703 | $cmdlist .= ":$chain - [0:0]\n"; |
704 | } | |
705 | ||
dec84fcd | 706 | my $rule = "INPUT -j PVEFW-INPUT"; |
3fa83edf DM |
707 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
708 | $cmdlist .= "-A $rule\n"; | |
709 | } | |
dec84fcd | 710 | $rule = "OUTPUT -j PVEFW-OUTPUT"; |
3fa83edf DM |
711 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
712 | $cmdlist .= "-A $rule\n"; | |
713 | } | |
714 | ||
dec84fcd | 715 | $rule = "FORWARD -j PVEFW-FORWARD"; |
3fa83edf DM |
716 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
717 | $cmdlist .= "-A $rule\n"; | |
718 | } | |
719 | ||
720 | foreach my $chain (sort keys %$ruleset) { | |
721 | my $stat = $statushash->{$chain}; | |
722 | die "internal error" if !$stat; | |
723 | ||
724 | if ($stat->{action} eq 'update' || $stat->{action} eq 'create') { | |
725 | $cmdlist .= "-F $chain\n"; | |
726 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
727 | $cmdlist .= "$cmd\n"; | |
728 | } | |
729 | $cmdlist .= print_sig_rule($chain, $stat->{sig}); | |
730 | } elsif ($stat->{action} eq 'delete') { | |
731 | $cmdlist .= "-F $chain\n"; | |
732 | $cmdlist .= "-X $chain\n"; | |
733 | } elsif ($stat->{action} eq 'exists') { | |
734 | # do nothing | |
735 | } else { | |
736 | die "internal error - unknown status '$stat->{action}'"; | |
737 | } | |
738 | } | |
739 | ||
740 | $cmdlist .= "COMMIT\n"; | |
741 | ||
742 | print $cmdlist if $verbose; | |
743 | ||
744 | iptables_restore_cmdlist($cmdlist); | |
745 | ||
746 | # test: re-read status and check if everything is up to date | |
747 | $statushash = get_ruleset_status($ruleset); | |
748 | ||
749 | my $errors; | |
750 | foreach my $chain (sort keys %$ruleset) { | |
751 | my $stat = $statushash->{$chain}; | |
752 | if ($stat->{action} ne 'exists') { | |
753 | warn "unable to update chain '$chain'\n"; | |
754 | $errors = 1; | |
755 | } | |
756 | } | |
b6360c3f | 757 | |
3fa83edf | 758 | die "unable to apply firewall changes\n" if $errors; |
b6360c3f DM |
759 | } |
760 | ||
b6360c3f | 761 | 1; |