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