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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; | |
09d5f68e | 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 | 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 | ||
780bcc0f DM |
140 | my $bridge_firewall_enabled = 0; |
141 | ||
142 | sub enable_bridge_firewall { | |
143 | ||
144 | return if $bridge_firewall_enabled; # only once | |
145 | ||
146 | system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables"); | |
147 | system("echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables"); | |
148 | ||
149 | $bridge_firewall_enabled = 1; | |
150 | } | |
151 | ||
8cebfa6f | 152 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; |
dddd9413 | 153 | |
3a616aa0 AD |
154 | sub iptables { |
155 | my ($cmd) = @_; | |
156 | ||
157 | run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {}); | |
158 | } | |
159 | ||
b16e818e DM |
160 | sub iptables_restore_cmdlist { |
161 | my ($cmdlist) = @_; | |
3a616aa0 | 162 | |
3fa83edf | 163 | run_command("/sbin/iptables-restore -n", input => $cmdlist); |
3a616aa0 AD |
164 | } |
165 | ||
de2a57cd DM |
166 | sub iptables_get_chains { |
167 | ||
168 | my $res = {}; | |
169 | ||
170 | # check what chains we want to track | |
171 | my $is_pvefw_chain = sub { | |
172 | my $name = shift; | |
173 | ||
dec84fcd DM |
174 | return 1 if $name =~ m/^PVEFW-\S+$/; |
175 | ||
de2a57cd | 176 | return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/; |
b16e818e | 177 | return 1 if $name =~ m/^vmbr\d+-(:?IN|OUT)$/; |
f50656c2 | 178 | return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/; |
de2a57cd DM |
179 | |
180 | return undef; | |
181 | }; | |
182 | ||
183 | my $table = ''; | |
184 | ||
de2a57cd DM |
185 | my $parser = sub { |
186 | my $line = shift; | |
187 | ||
188 | return if $line =~ m/^#/; | |
189 | return if $line =~ m/^\s*$/; | |
190 | ||
191 | if ($line =~ m/^\*(\S+)$/) { | |
192 | $table = $1; | |
193 | return; | |
194 | } | |
195 | ||
196 | return if $table ne 'filter'; | |
197 | ||
198 | if ($line =~ m/^:(\S+)\s/) { | |
199 | my $chain = $1; | |
200 | return if !&$is_pvefw_chain($chain); | |
3fa83edf | 201 | $res->{$chain} = "unknown"; |
09d5f68e | 202 | } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) { |
3fa83edf | 203 | my ($chain, $sig) = ($1, $2); |
de2a57cd | 204 | return if !&$is_pvefw_chain($chain); |
3fa83edf | 205 | $res->{$chain} = $sig; |
de2a57cd DM |
206 | } else { |
207 | # simply ignore the rest | |
208 | return; | |
209 | } | |
210 | }; | |
211 | ||
212 | run_command("/sbin/iptables-save", outfunc => $parser); | |
213 | ||
de2a57cd DM |
214 | return $res; |
215 | } | |
216 | ||
3a616aa0 AD |
217 | sub iptables_chain_exist { |
218 | my ($chain) = @_; | |
219 | ||
220 | eval{ | |
221 | iptables("-n --list $chain"); | |
222 | }; | |
223 | return undef if $@; | |
224 | ||
225 | return 1; | |
226 | } | |
227 | ||
228 | sub iptables_rule_exist { | |
229 | my ($rule) = @_; | |
230 | ||
231 | eval{ | |
232 | iptables("-C $rule"); | |
233 | }; | |
234 | return undef if $@; | |
235 | ||
236 | return 1; | |
237 | } | |
238 | ||
3fa83edf | 239 | sub ruleset_generate_rule { |
4e6112f9 | 240 | my ($ruleset, $chain, $rule, $goto) = @_; |
3a616aa0 | 241 | |
3fa83edf | 242 | my $cmd = ''; |
3a616aa0 | 243 | |
d6de1dc2 | 244 | $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1; |
3a616aa0 | 245 | $cmd .= " -s $rule->{source}" if $rule->{source}; |
d6de1dc2 | 246 | $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1; |
3a616aa0 AD |
247 | $cmd .= " -d $rule->{dest}" if $rule->{destination}; |
248 | $cmd .= " -p $rule->{proto}" if $rule->{proto}; | |
4cdbb3b7 | 249 | $cmd .= " --match multiport" if $rule->{nbdport} && $rule->{nbdport} > 1; |
3a616aa0 | 250 | $cmd .= " --dport $rule->{dport}" if $rule->{dport}; |
4cdbb3b7 | 251 | $cmd .= " --match multiport" if $rule->{nbsport} && $rule->{nbsport} > 1; |
3a616aa0 | 252 | $cmd .= " --sport $rule->{sport}" if $rule->{sport}; |
4e6112f9 DM |
253 | |
254 | if (my $action = $rule->{action}) { | |
255 | $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK'; | |
256 | $cmd .= $goto ? " -g $action" : " -j $action"; | |
257 | }; | |
3a616aa0 | 258 | |
3fa83edf DM |
259 | ruleset_addrule($ruleset, $chain, $cmd) if $cmd; |
260 | } | |
261 | ||
262 | sub ruleset_create_chain { | |
263 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 264 | |
d050c724 DM |
265 | die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28; |
266 | ||
3fa83edf DM |
267 | die "chain '$chain' already exists\n" if $ruleset->{$chain}; |
268 | ||
269 | $ruleset->{$chain} = []; | |
3a616aa0 AD |
270 | } |
271 | ||
3fa83edf DM |
272 | sub ruleset_chain_exist { |
273 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 274 | |
3fa83edf DM |
275 | return $ruleset->{$chain} ? 1 : undef; |
276 | } | |
3a616aa0 | 277 | |
3fa83edf DM |
278 | sub ruleset_addrule { |
279 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 280 | |
3fa83edf | 281 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 282 | |
3fa83edf DM |
283 | push @{$ruleset->{$chain}}, "-A $chain $rule"; |
284 | } | |
3a616aa0 | 285 | |
3fa83edf DM |
286 | sub ruleset_insertrule { |
287 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 288 | |
3fa83edf | 289 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 290 | |
3fa83edf DM |
291 | unshift @{$ruleset->{$chain}}, "-A $chain $rule"; |
292 | } | |
3a616aa0 | 293 | |
3fa83edf DM |
294 | sub generate_bridge_chains { |
295 | my ($ruleset, $bridge) = @_; | |
3a616aa0 | 296 | |
dec84fcd DM |
297 | if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-IN")){ |
298 | ruleset_create_chain($ruleset, "PVEFW-BRIDGE-IN"); | |
d4d0fd1d AD |
299 | } |
300 | ||
dec84fcd DM |
301 | if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-OUT")){ |
302 | ruleset_create_chain($ruleset, "PVEFW-BRIDGE-OUT"); | |
d4d0fd1d | 303 | } |
3fa83edf | 304 | |
dec84fcd DM |
305 | if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){ |
306 | ruleset_create_chain($ruleset, "PVEFW-FORWARD"); | |
3fa83edf | 307 | |
dec84fcd DM |
308 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m state --state RELATED,ESTABLISHED -j ACCEPT"); |
309 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-in --physdev-is-bridged -j PVEFW-BRIDGE-OUT"); | |
310 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-out --physdev-is-bridged -j PVEFW-BRIDGE-IN"); | |
3a616aa0 AD |
311 | } |
312 | ||
3fa83edf DM |
313 | if (!ruleset_chain_exist($ruleset, "$bridge-IN")) { |
314 | ruleset_create_chain($ruleset, "$bridge-IN"); | |
dec84fcd DM |
315 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing |
316 | ruleset_addrule($ruleset, "PVEFW-BRIDGE-IN", "-j $bridge-IN"); | |
3fa83edf DM |
317 | ruleset_addrule($ruleset, "$bridge-IN", "-j ACCEPT"); |
318 | } | |
3a616aa0 | 319 | |
3fa83edf DM |
320 | if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) { |
321 | ruleset_create_chain($ruleset, "$bridge-OUT"); | |
dec84fcd DM |
322 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing |
323 | ruleset_addrule($ruleset, "PVEFW-BRIDGE-OUT", "-j $bridge-OUT"); | |
3fa83edf DM |
324 | } |
325 | } | |
3a616aa0 AD |
326 | |
327 | sub generate_tap_rules_direction { | |
51bae274 | 328 | my ($ruleset, $group_rules, $iface, $netid, $macaddr, $rules, $bridge, $direction) = @_; |
3a616aa0 AD |
329 | |
330 | my $tapchain = "$iface-$direction"; | |
331 | ||
3fa83edf | 332 | ruleset_create_chain($ruleset, $tapchain); |
3a616aa0 | 333 | |
3fa83edf DM |
334 | ruleset_addrule($ruleset, $tapchain, "-m state --state INVALID -j DROP"); |
335 | ruleset_addrule($ruleset, $tapchain, "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
3a616aa0 | 336 | |
c29f55c9 DM |
337 | if ($direction eq 'OUT' && defined($macaddr)) { |
338 | ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP"); | |
339 | } | |
340 | ||
3fa83edf | 341 | if ($rules) { |
3a616aa0 AD |
342 | foreach my $rule (@$rules) { |
343 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
bfbfa8b6 | 344 | # we go to $bridge-IN if accept in out rules |
3a616aa0 | 345 | if($rule->{action} =~ m/^(GROUP-(\S+))$/){ |
3fa83edf DM |
346 | $rule->{action} .= "-$direction"; |
347 | # generate empty group rule if don't exist | |
348 | if(!ruleset_chain_exist($ruleset, $rule->{action})){ | |
51bae274 | 349 | generate_group_rules($ruleset, $group_rules, $2); |
3fa83edf | 350 | } |
4e6112f9 | 351 | ruleset_generate_rule($ruleset, $tapchain, $rule); |
31ff3ef6 DM |
352 | ruleset_addrule($ruleset, $tapchain, "-m mark --mark 1 -g $bridge-IN") |
353 | if $direction eq 'OUT'; | |
4e6112f9 | 354 | } else { |
4e6112f9 DM |
355 | $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT'; |
356 | ruleset_generate_rule($ruleset, $tapchain, $rule); | |
3a616aa0 | 357 | } |
4e6112f9 | 358 | } |
3a616aa0 AD |
359 | } |
360 | ||
3fa83edf DM |
361 | ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4"); |
362 | ruleset_addrule($ruleset, $tapchain, "-j DROP"); | |
3a616aa0 | 363 | |
3fa83edf DM |
364 | # plug the tap chain to bridge chain |
365 | my $physdevdirection = $direction eq 'IN' ? "out" : "in"; | |
366 | my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain"; | |
367 | ruleset_insertrule($ruleset, "$bridge-$direction", $rule); | |
3a616aa0 | 368 | |
3fa83edf DM |
369 | if ($direction eq 'OUT'){ |
370 | # add tap->host rules | |
371 | my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain"; | |
dec84fcd | 372 | ruleset_addrule($ruleset, "PVEFW-INPUT", $rule); |
3a616aa0 AD |
373 | } |
374 | } | |
375 | ||
0bd5f137 | 376 | sub enablehostfw { |
51bae274 | 377 | my ($ruleset, $rules, $group_rules) = @_; |
0bd5f137 | 378 | |
51bae274 | 379 | # fixme: allow security groups |
0bd5f137 | 380 | |
3fa83edf | 381 | # host inbound firewall |
dec84fcd DM |
382 | my $chain = "PVEFW-HOST-IN"; |
383 | ruleset_create_chain($ruleset, $chain); | |
0bd5f137 | 384 | |
dec84fcd DM |
385 | ruleset_addrule($ruleset, $chain, "-m state --state INVALID -j DROP"); |
386 | ruleset_addrule($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
387 | ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT"); | |
388 | ruleset_addrule($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->{in}) { |
393 | foreach my $rule (@{$rules->{in}}) { | |
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, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4"); |
401 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
0bd5f137 | 402 | |
3fa83edf | 403 | # host outbound firewall |
aadd745e | 404 | $chain = "PVEFW-HOST-OUT"; |
dec84fcd DM |
405 | ruleset_create_chain($ruleset, $chain); |
406 | ||
407 | ruleset_addrule($ruleset, $chain, "-m state --state INVALID -j DROP"); | |
408 | ruleset_addrule($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
409 | ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT"); | |
410 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
411 | ruleset_addrule($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT"); | |
412 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
0bd5f137 | 413 | |
3fa83edf DM |
414 | if ($rules->{out}) { |
415 | foreach my $rule (@{$rules->{out}}) { | |
416 | # we use RETURN because we need to check also tap rules | |
417 | $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT'; | |
dec84fcd | 418 | ruleset_generate_rule($ruleset, $chain, $rule); |
3fa83edf | 419 | } |
0bd5f137 AD |
420 | } |
421 | ||
dec84fcd DM |
422 | ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4"); |
423 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
9d31b418 | 424 | |
dec84fcd DM |
425 | ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT"); |
426 | ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN"); | |
9d31b418 AD |
427 | } |
428 | ||
429 | sub generate_group_rules { | |
51bae274 | 430 | my ($ruleset, $group_rules, $group) = @_; |
9d31b418 | 431 | |
51bae274 | 432 | my $rules = $group_rules->{$group}; |
9d31b418 | 433 | |
51bae274 DM |
434 | die "no such security group '$group'\n" if !$rules; |
435 | ||
3fa83edf | 436 | my $chain = "GROUP-${group}-IN"; |
9d31b418 | 437 | |
3fa83edf | 438 | ruleset_create_chain($ruleset, $chain); |
9d31b418 | 439 | |
3fa83edf DM |
440 | if ($rules->{in}) { |
441 | foreach my $rule (@{$rules->{in}}) { | |
442 | ruleset_generate_rule($ruleset, $chain, $rule); | |
9d31b418 AD |
443 | } |
444 | } | |
445 | ||
3fa83edf | 446 | $chain = "GROUP-${group}-OUT"; |
9d31b418 | 447 | |
3fa83edf | 448 | ruleset_create_chain($ruleset, $chain); |
4e6112f9 | 449 | ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark |
9d31b418 | 450 | |
3fa83edf DM |
451 | if ($rules->{out}) { |
452 | foreach my $rule (@{$rules->{out}}) { | |
4e6112f9 DM |
453 | # we go the PVEFW-SET-ACCEPT-MARK Instead of ACCEPT) because we need to |
454 | # check also other tap rules (and group rules can be set on any bridge, | |
455 | # so we can't go to VMBRXX-IN) | |
456 | $rule->{action} = 'PVEFW-SET-ACCEPT-MARK' if $rule->{action} eq 'ACCEPT'; | |
6a6c7af7 | 457 | ruleset_generate_rule($ruleset, $chain, $rule); |
9d31b418 AD |
458 | } |
459 | } | |
9d31b418 AD |
460 | } |
461 | ||
51bae274 DM |
462 | my $MAX_NETS = 32; |
463 | my $valid_netdev_names = {}; | |
464 | for (my $i = 0; $i < $MAX_NETS; $i++) { | |
465 | $valid_netdev_names->{"net$i"} = 1; | |
466 | } | |
5e1267a5 | 467 | |
51bae274 DM |
468 | sub parse_fw_rule { |
469 | my ($line, $need_iface, $allow_groups) = @_; | |
5e1267a5 | 470 | |
a332200b | 471 | my $macros = get_firewall_macros(); |
fcba0beb | 472 | my $protocols = get_etc_protocols(); |
51bae274 DM |
473 | |
474 | my ($action, $iface, $source, $dest, $proto, $dport, $sport); | |
475 | ||
476 | $line =~ s/#.*$//; | |
477 | ||
478 | my @data = split(/\s+/, $line); | |
479 | my $expected_elements = $need_iface ? 7 : 6; | |
480 | ||
481 | die "wrong number of rule elements\n" if scalar(@data) > $expected_elements; | |
482 | ||
483 | if ($need_iface) { | |
484 | ($action, $iface, $source, $dest, $proto, $dport, $sport) = @data | |
485 | } else { | |
486 | ($action, $source, $dest, $proto, $dport, $sport) = @data; | |
487 | } | |
488 | ||
489 | die "incomplete rule\n" if !$action; | |
490 | ||
491 | my $service; | |
492 | if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) { | |
493 | # OK | |
494 | } elsif ($allow_groups && $action =~ m/^GROUP-(:?\S+)$/) { | |
495 | # OK | |
496 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
497 | ($service, $action) = ($1, $2); | |
498 | if (!$macros->{$service}) { | |
499 | die "unknown service '$service'\n"; | |
500 | } | |
501 | } else { | |
502 | die "unknown action '$action'\n"; | |
503 | } | |
504 | ||
505 | if ($need_iface) { | |
506 | $iface = undef if $iface && $iface eq '-'; | |
507 | die "unknown interface '$iface'\n" | |
508 | if defined($iface) && !$valid_netdev_names->{$iface}; | |
509 | } | |
510 | ||
511 | $proto = undef if $proto && $proto eq '-'; | |
512 | die "unknown protokol '$proto'\n" if $proto && | |
513 | !(defined($protocols->{byname}->{$proto}) || | |
514 | defined($protocols->{byid}->{$proto})); | |
515 | ||
516 | $source = undef if $source && $source eq '-'; | |
517 | $dest = undef if $dest && $dest eq '-'; | |
518 | ||
519 | $dport = undef if $dport && $dport eq '-'; | |
520 | $sport = undef if $sport && $sport eq '-'; | |
521 | ||
522 | my $nbdport = undef; | |
523 | my $nbsport = undef; | |
524 | my $nbsource = undef; | |
525 | my $nbdest = undef; | |
526 | ||
527 | $nbsource = parse_address_list($source) if $source; | |
528 | $nbdest = parse_address_list($dest) if $dest; | |
529 | $nbdport = parse_port_name_number_or_range($dport) if $dport; | |
530 | $nbsport = parse_port_name_number_or_range($sport) if $sport; | |
531 | ||
532 | return { | |
533 | action => $action, | |
534 | service => $service, | |
535 | iface => $iface, | |
536 | source => $source, | |
537 | dest => $dest, | |
538 | nbsource => $nbsource, | |
539 | nbdest => $nbdest, | |
540 | proto => $proto, | |
541 | dport => $dport, | |
542 | sport => $sport, | |
543 | nbdport => $nbdport, | |
544 | nbsport => $nbsport, | |
545 | }; | |
546 | } | |
547 | ||
548 | sub parse_vm_fw_rules { | |
549 | my ($filename, $fh) = @_; | |
550 | ||
551 | my $res = { in => [], out => [] }; | |
552 | ||
553 | my $section; | |
554 | ||
5e1267a5 DM |
555 | while (defined(my $line = <$fh>)) { |
556 | next if $line =~ m/^#/; | |
557 | next if $line =~ m/^\s*$/; | |
558 | ||
51bae274 | 559 | if ($line =~ m/^\[(in|out)\]\s*$/i) { |
5e1267a5 DM |
560 | $section = lc($1); |
561 | next; | |
562 | } | |
51bae274 DM |
563 | if (!$section) { |
564 | warn "$filename (line $.): skip line - no section"; | |
5e1267a5 DM |
565 | next; |
566 | } | |
567 | ||
51bae274 DM |
568 | my $rule; |
569 | eval { $rule = parse_fw_rule($line, 1, 1); }; | |
570 | if (my $err = $@) { | |
571 | warn "$filename (line $.): $err"; | |
5e1267a5 DM |
572 | next; |
573 | } | |
574 | ||
51bae274 DM |
575 | push @{$res->{$section}}, $rule; |
576 | } | |
577 | ||
578 | return $res; | |
579 | } | |
580 | ||
581 | sub parse_host_fw_rules { | |
582 | my ($filename, $fh) = @_; | |
583 | ||
584 | my $res = { in => [], out => [] }; | |
585 | ||
586 | my $section; | |
587 | ||
588 | while (defined(my $line = <$fh>)) { | |
589 | next if $line =~ m/^#/; | |
590 | next if $line =~ m/^\s*$/; | |
591 | ||
592 | if ($line =~ m/^\[(in|out)\]\s*$/i) { | |
593 | $section = lc($1); | |
5e1267a5 DM |
594 | next; |
595 | } | |
51bae274 DM |
596 | if (!$section) { |
597 | warn "$filename (line $.): skip line - no section"; | |
5e1267a5 DM |
598 | next; |
599 | } | |
600 | ||
51bae274 DM |
601 | my $rule; |
602 | eval { $rule = parse_fw_rule($line, 1, 1); }; | |
ecbea048 | 603 | if (my $err = $@) { |
51bae274 | 604 | warn "$filename (line $.): $err"; |
ecbea048 | 605 | next; |
ecbea048 DM |
606 | } |
607 | ||
51bae274 DM |
608 | push @{$res->{$section}}, $rule; |
609 | } | |
ecbea048 | 610 | |
51bae274 DM |
611 | return $res; |
612 | } | |
4cdbb3b7 | 613 | |
51bae274 DM |
614 | sub parse_group_fw_rules { |
615 | my ($filename, $fh) = @_; | |
5e1267a5 | 616 | |
51bae274 DM |
617 | my $section; |
618 | my $group; | |
619 | ||
620 | my $res = { in => [], out => [] }; | |
621 | ||
622 | while (defined(my $line = <$fh>)) { | |
623 | next if $line =~ m/^#/; | |
624 | next if $line =~ m/^\s*$/; | |
625 | ||
626 | if ($line =~ m/^\[(in|out):(\S+)\]\s*$/i) { | |
627 | $section = lc($1); | |
628 | $group = lc($2); | |
629 | next; | |
630 | } | |
631 | if (!$section || !$group) { | |
632 | warn "$filename (line $.): skip line - no section"; | |
633 | next; | |
634 | } | |
635 | ||
636 | my $rule; | |
637 | eval { $rule = parse_fw_rule($line, 0, 0); }; | |
638 | if (my $err = $@) { | |
639 | warn "$filename (line $.): $err"; | |
640 | next; | |
641 | } | |
642 | ||
643 | push @{$res->{$group}->{$section}}, $rule; | |
5e1267a5 DM |
644 | } |
645 | ||
646 | return $res; | |
647 | } | |
648 | ||
06320eb0 DM |
649 | sub run_locked { |
650 | my ($code, @param) = @_; | |
651 | ||
652 | my $timeout = 10; | |
653 | ||
654 | my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param); | |
655 | ||
656 | die $@ if $@; | |
657 | ||
658 | return $res; | |
659 | } | |
660 | ||
5e1267a5 DM |
661 | sub read_local_vm_config { |
662 | ||
663 | my $openvz = {}; | |
664 | ||
665 | my $qemu = {}; | |
666 | ||
667 | my $list = PVE::QemuServer::config_list(); | |
668 | ||
669 | foreach my $vmid (keys %$list) { | |
5e1267a5 DM |
670 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); |
671 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
672 | $qemu->{$vmid} = $conf; | |
673 | } | |
674 | } | |
675 | ||
676 | my $vmdata = { openvz => $openvz, qemu => $qemu }; | |
677 | ||
678 | return $vmdata; | |
679 | }; | |
680 | ||
681 | sub read_vm_firewall_rules { | |
682 | my ($vmdata) = @_; | |
683 | my $rules = {}; | |
684 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { | |
685 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
686 | my $fh = IO::File->new($filename, O_RDONLY); | |
687 | next if !$fh; | |
688 | ||
51bae274 | 689 | $rules->{$vmid} = parse_vm_fw_rules($filename, $fh); |
5e1267a5 DM |
690 | } |
691 | ||
692 | return $rules; | |
693 | } | |
694 | ||
695 | sub compile { | |
5e1267a5 DM |
696 | my $vmdata = read_local_vm_config(); |
697 | my $rules = read_vm_firewall_rules($vmdata); | |
51bae274 DM |
698 | |
699 | my $group_rules = {}; | |
700 | my $filename = "/etc/pve/firewall/groups.fw"; | |
701 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
702 | $group_rules = parse_group_fw_rules($filename, $fh); | |
703 | } | |
5e1267a5 | 704 | |
3fa83edf DM |
705 | #print Dumper($rules); |
706 | ||
707 | my $ruleset = {}; | |
708 | ||
709 | # setup host firewall rules | |
dec84fcd DM |
710 | ruleset_create_chain($ruleset, "PVEFW-INPUT"); |
711 | ruleset_create_chain($ruleset, "PVEFW-OUTPUT"); | |
3fa83edf | 712 | |
4e6112f9 DM |
713 | ruleset_create_chain($ruleset, "PVEFW-SET-ACCEPT-MARK"); |
714 | ruleset_addrule($ruleset, "PVEFW-SET-ACCEPT-MARK", "-j MARK --set-mark 1"); | |
715 | ||
51bae274 DM |
716 | $filename = "/etc/pve/local/host.fw"; |
717 | if (my $fh = IO::File->new($filename, O_RDONLY)) { | |
718 | my $host_rules = parse_host_fw_rules($filename, $fh); | |
719 | enablehostfw($ruleset, $host_rules, $group_rules); | |
720 | } | |
3fa83edf DM |
721 | |
722 | # generate firewall rules for QEMU VMs | |
723 | foreach my $vmid (keys %{$vmdata->{qemu}}) { | |
724 | my $conf = $vmdata->{qemu}->{$vmid}; | |
725 | next if !$rules->{$vmid}; | |
726 | ||
727 | foreach my $netid (keys %$conf) { | |
728 | next if $netid !~ m/^net(\d+)$/; | |
729 | my $net = PVE::QemuServer::parse_net($conf->{$netid}); | |
730 | next if !$net; | |
731 | my $iface = "tap${vmid}i$1"; | |
5e1267a5 | 732 | |
3fa83edf DM |
733 | my $bridge = $net->{bridge}; |
734 | next if !$bridge; # fixme: ? | |
735 | ||
736 | $bridge .= "v$net->{tag}" if $net->{tag}; | |
737 | ||
738 | generate_bridge_chains($ruleset, $bridge); | |
739 | ||
c29f55c9 | 740 | my $macaddr = $net->{macaddr}; |
51bae274 DM |
741 | generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{in}, $bridge, 'IN'); |
742 | generate_tap_rules_direction($ruleset, $group_rules, $iface, $netid, $macaddr, $rules->{$vmid}->{out}, $bridge, 'OUT'); | |
3fa83edf DM |
743 | } |
744 | } | |
3fa83edf DM |
745 | return $ruleset; |
746 | } | |
747 | ||
748 | sub get_ruleset_status { | |
749 | my ($ruleset, $verbose) = @_; | |
750 | ||
751 | my $active_chains = iptables_get_chains(); | |
752 | ||
753 | my $statushash = {}; | |
754 | ||
755 | foreach my $chain (sort keys %$ruleset) { | |
09d5f68e | 756 | my $digest = Digest::SHA->new('sha1'); |
3fa83edf DM |
757 | foreach my $cmd (@{$ruleset->{$chain}}) { |
758 | $digest->add("$cmd\n"); | |
759 | } | |
760 | my $sig = $digest->b64digest; | |
761 | $statushash->{$chain}->{sig} = $sig; | |
762 | ||
763 | my $oldsig = $active_chains->{$chain}; | |
764 | if (!defined($oldsig)) { | |
765 | $statushash->{$chain}->{action} = 'create'; | |
766 | } else { | |
767 | if ($oldsig eq $sig) { | |
768 | $statushash->{$chain}->{action} = 'exists'; | |
769 | } else { | |
770 | $statushash->{$chain}->{action} = 'update'; | |
771 | } | |
772 | } | |
773 | print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose; | |
774 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
775 | print "\t$cmd\n" if $verbose; | |
776 | } | |
777 | } | |
778 | ||
779 | foreach my $chain (sort keys %$active_chains) { | |
780 | if (!defined($ruleset->{$chain})) { | |
781 | my $sig = $active_chains->{$chain}; | |
782 | $statushash->{$chain}->{action} = 'delete'; | |
783 | $statushash->{$chain}->{sig} = $sig; | |
784 | print "delete $chain ($sig)\n" if $verbose; | |
785 | } | |
786 | } | |
787 | ||
788 | return $statushash; | |
789 | } | |
790 | ||
791 | sub print_ruleset { | |
792 | my ($ruleset) = @_; | |
793 | ||
794 | get_ruleset_status($ruleset, 1); | |
795 | } | |
796 | ||
797 | sub print_sig_rule { | |
798 | my ($chain, $sig) = @_; | |
799 | ||
09d5f68e DM |
800 | # We just use this to store a SHA1 checksum used to detect changes |
801 | return "-A $chain -m comment --comment \"PVESIG:$sig\"\n"; | |
b6360c3f DM |
802 | } |
803 | ||
a84f4d96 DM |
804 | sub apply_ruleset { |
805 | my ($ruleset, $verbose) = @_; | |
3fa83edf | 806 | |
a84f4d96 | 807 | enable_bridge_firewall(); |
3fa83edf DM |
808 | |
809 | my $cmdlist = "*filter\n"; # we pass this to iptables-restore; | |
810 | ||
811 | my $statushash = get_ruleset_status($ruleset, $verbose); | |
812 | ||
813 | # create missing chains first | |
814 | foreach my $chain (sort keys %$ruleset) { | |
815 | my $stat = $statushash->{$chain}; | |
816 | die "internal error" if !$stat; | |
817 | next if $stat->{action} ne 'create'; | |
886aba9c | 818 | |
3fa83edf DM |
819 | $cmdlist .= ":$chain - [0:0]\n"; |
820 | } | |
821 | ||
dec84fcd | 822 | my $rule = "INPUT -j PVEFW-INPUT"; |
3fa83edf DM |
823 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
824 | $cmdlist .= "-A $rule\n"; | |
825 | } | |
dec84fcd | 826 | $rule = "OUTPUT -j PVEFW-OUTPUT"; |
3fa83edf DM |
827 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
828 | $cmdlist .= "-A $rule\n"; | |
829 | } | |
830 | ||
dec84fcd | 831 | $rule = "FORWARD -j PVEFW-FORWARD"; |
3fa83edf DM |
832 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
833 | $cmdlist .= "-A $rule\n"; | |
834 | } | |
835 | ||
836 | foreach my $chain (sort keys %$ruleset) { | |
837 | my $stat = $statushash->{$chain}; | |
838 | die "internal error" if !$stat; | |
839 | ||
840 | if ($stat->{action} eq 'update' || $stat->{action} eq 'create') { | |
841 | $cmdlist .= "-F $chain\n"; | |
842 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
843 | $cmdlist .= "$cmd\n"; | |
844 | } | |
845 | $cmdlist .= print_sig_rule($chain, $stat->{sig}); | |
846 | } elsif ($stat->{action} eq 'delete') { | |
f5d28682 | 847 | die "internal error"; # this should not happen |
3fa83edf DM |
848 | } elsif ($stat->{action} eq 'exists') { |
849 | # do nothing | |
850 | } else { | |
851 | die "internal error - unknown status '$stat->{action}'"; | |
852 | } | |
853 | } | |
854 | ||
f5d28682 DM |
855 | foreach my $chain (keys %$statushash) { |
856 | next if $statushash->{$chain}->{action} ne 'delete'; | |
857 | $cmdlist .= "-F $chain\n"; | |
858 | } | |
859 | foreach my $chain (keys %$statushash) { | |
860 | next if $statushash->{$chain}->{action} ne 'delete'; | |
861 | $cmdlist .= "-X $chain\n"; | |
862 | } | |
863 | ||
3fa83edf DM |
864 | $cmdlist .= "COMMIT\n"; |
865 | ||
866 | print $cmdlist if $verbose; | |
867 | ||
868 | iptables_restore_cmdlist($cmdlist); | |
869 | ||
870 | # test: re-read status and check if everything is up to date | |
871 | $statushash = get_ruleset_status($ruleset); | |
872 | ||
873 | my $errors; | |
874 | foreach my $chain (sort keys %$ruleset) { | |
875 | my $stat = $statushash->{$chain}; | |
876 | if ($stat->{action} ne 'exists') { | |
877 | warn "unable to update chain '$chain'\n"; | |
878 | $errors = 1; | |
879 | } | |
880 | } | |
b6360c3f | 881 | |
3fa83edf | 882 | die "unable to apply firewall changes\n" if $errors; |
b6360c3f DM |
883 | } |
884 | ||
b6360c3f | 885 | 1; |