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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, $bridge) = @_; | |
3a616aa0 | 279 | |
d4d0fd1d AD |
280 | if (!ruleset_chain_exist($ruleset, "BRIDGEFW-IN")){ |
281 | ruleset_create_chain($ruleset, "BRIDGEFW-IN"); | |
282 | } | |
283 | ||
284 | if (!ruleset_chain_exist($ruleset, "BRIDGEFW-OUT")){ | |
285 | ruleset_create_chain($ruleset, "BRIDGEFW-OUT"); | |
286 | } | |
3fa83edf DM |
287 | |
288 | if (!ruleset_chain_exist($ruleset, "proxmoxfw-FORWARD")){ | |
289 | ruleset_create_chain($ruleset, "proxmoxfw-FORWARD"); | |
290 | ||
291 | ruleset_addrule($ruleset, "proxmoxfw-FORWARD", "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
292 | ruleset_addrule($ruleset, "proxmoxfw-FORWARD", "-m physdev --physdev-is-in --physdev-is-bridged -j BRIDGEFW-OUT"); | |
293 | ruleset_addrule($ruleset, "proxmoxfw-FORWARD", "-m physdev --physdev-is-out --physdev-is-bridged -j BRIDGEFW-IN"); | |
3a616aa0 AD |
294 | } |
295 | ||
3fa83edf DM |
296 | if (!ruleset_chain_exist($ruleset, "$bridge-IN")) { |
297 | ruleset_create_chain($ruleset, "$bridge-IN"); | |
298 | ruleset_addrule($ruleset, "proxmoxfw-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing | |
299 | ruleset_addrule($ruleset, "BRIDGEFW-IN", "-j $bridge-IN"); | |
300 | ruleset_addrule($ruleset, "$bridge-IN", "-j ACCEPT"); | |
301 | } | |
3a616aa0 | 302 | |
3fa83edf DM |
303 | if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) { |
304 | ruleset_create_chain($ruleset, "$bridge-OUT"); | |
305 | ruleset_addrule($ruleset, "proxmoxfw-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing | |
306 | ruleset_addrule($ruleset, "BRIDGEFW-OUT", "-j $bridge-OUT"); | |
307 | } | |
308 | } | |
3a616aa0 AD |
309 | |
310 | sub generate_tap_rules_direction { | |
3fa83edf | 311 | my ($ruleset, $iface, $netid, $rules, $bridge, $direction) = @_; |
3a616aa0 AD |
312 | |
313 | my $tapchain = "$iface-$direction"; | |
314 | ||
3fa83edf | 315 | ruleset_create_chain($ruleset, $tapchain); |
3a616aa0 | 316 | |
3fa83edf DM |
317 | ruleset_addrule($ruleset, $tapchain, "-m state --state INVALID -j DROP"); |
318 | ruleset_addrule($ruleset, $tapchain, "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
3a616aa0 | 319 | |
3fa83edf | 320 | if ($rules) { |
3a616aa0 AD |
321 | foreach my $rule (@$rules) { |
322 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
323 | if($rule->{action} =~ m/^(GROUP-(\S+))$/){ | |
3fa83edf DM |
324 | $rule->{action} .= "-$direction"; |
325 | # generate empty group rule if don't exist | |
326 | if(!ruleset_chain_exist($ruleset, $rule->{action})){ | |
327 | generate_group_rules($ruleset, $2); | |
328 | } | |
3a616aa0 | 329 | } |
3fa83edf | 330 | # we go to vmbr-IN if accept in out rules |
3a616aa0 | 331 | $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT'; |
3fa83edf | 332 | ruleset_generate_rule($ruleset, $tapchain, $rule); |
3a616aa0 AD |
333 | } |
334 | } | |
335 | ||
3fa83edf DM |
336 | ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4"); |
337 | ruleset_addrule($ruleset, $tapchain, "-j DROP"); | |
3a616aa0 | 338 | |
3fa83edf DM |
339 | # plug the tap chain to bridge chain |
340 | my $physdevdirection = $direction eq 'IN' ? "out" : "in"; | |
341 | my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain"; | |
342 | ruleset_insertrule($ruleset, "$bridge-$direction", $rule); | |
3a616aa0 | 343 | |
3fa83edf DM |
344 | if ($direction eq 'OUT'){ |
345 | # add tap->host rules | |
346 | my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain"; | |
347 | ruleset_addrule($ruleset, "proxmoxfw-INPUT", $rule); | |
3a616aa0 AD |
348 | } |
349 | } | |
350 | ||
0bd5f137 | 351 | sub enablehostfw { |
3fa83edf | 352 | my ($ruleset) = @_; |
0bd5f137 AD |
353 | |
354 | my $filename = "/etc/pve/local/host.fw"; | |
355 | my $fh = IO::File->new($filename, O_RDONLY); | |
356 | return if !$fh; | |
357 | ||
358 | my $rules = parse_fw_rules($filename, $fh); | |
0bd5f137 | 359 | |
3fa83edf DM |
360 | # host inbound firewall |
361 | ruleset_create_chain($ruleset, "host-IN"); | |
0bd5f137 | 362 | |
3fa83edf DM |
363 | ruleset_addrule($ruleset, "host-IN", "-m state --state INVALID -j DROP"); |
364 | ruleset_addrule($ruleset, "host-IN", "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
365 | ruleset_addrule($ruleset, "host-IN", "-i lo -j ACCEPT"); | |
366 | ruleset_addrule($ruleset, "host-IN", "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
367 | ruleset_addrule($ruleset, "host-IN", "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT"); | |
368 | ruleset_addrule($ruleset, "host-IN", "-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 $rule->{action} eq 'ACCEPT'; | |
374 | ruleset_generate_rule($ruleset, "host-IN", $rule); | |
375 | } | |
0bd5f137 AD |
376 | } |
377 | ||
3fa83edf DM |
378 | ruleset_addrule($ruleset, "host-IN", "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4"); |
379 | ruleset_addrule($ruleset, "host-IN", "-j DROP"); | |
0bd5f137 | 380 | |
3fa83edf DM |
381 | # host outbound firewall |
382 | ruleset_create_chain($ruleset, "host-OUT"); | |
383 | ruleset_addrule($ruleset, "host-OUT", "-m state --state INVALID -j DROP"); | |
384 | ruleset_addrule($ruleset, "host-OUT", "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
385 | ruleset_addrule($ruleset, "host-OUT", "-o lo -j ACCEPT"); | |
386 | ruleset_addrule($ruleset, "host-OUT", "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
387 | ruleset_addrule($ruleset, "host-OUT", "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT"); | |
388 | ruleset_addrule($ruleset, "host-OUT", "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
0bd5f137 | 389 | |
3fa83edf DM |
390 | if ($rules->{out}) { |
391 | foreach my $rule (@{$rules->{out}}) { | |
392 | # we use RETURN because we need to check also tap rules | |
393 | $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT'; | |
394 | ruleset_generate_rule($ruleset, "host-OUT", $rule); | |
395 | } | |
0bd5f137 AD |
396 | } |
397 | ||
3fa83edf DM |
398 | ruleset_addrule($ruleset, "host-OUT", "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4"); |
399 | ruleset_addrule($ruleset, "host-OUT", "-j DROP"); | |
9d31b418 | 400 | |
3fa83edf DM |
401 | ruleset_addrule($ruleset, "proxmoxfw-OUTPUT", "-j host-OUT"); |
402 | ruleset_addrule($ruleset, "proxmoxfw-INPUT", "-j host-IN"); | |
9d31b418 AD |
403 | } |
404 | ||
405 | sub generate_group_rules { | |
3fa83edf | 406 | my ($ruleset, $group) = @_; |
9d31b418 AD |
407 | |
408 | my $filename = "/etc/pve/firewall/groups.fw"; | |
409 | my $fh = IO::File->new($filename, O_RDONLY); | |
410 | return if !$fh; | |
411 | ||
412 | my $rules = parse_fw_rules($filename, $fh, $group); | |
9d31b418 | 413 | |
3fa83edf | 414 | my $chain = "GROUP-${group}-IN"; |
9d31b418 | 415 | |
3fa83edf | 416 | ruleset_create_chain($ruleset, $chain); |
9d31b418 | 417 | |
3fa83edf DM |
418 | if ($rules->{in}) { |
419 | foreach my $rule (@{$rules->{in}}) { | |
420 | ruleset_generate_rule($ruleset, $chain, $rule); | |
9d31b418 AD |
421 | } |
422 | } | |
423 | ||
3fa83edf | 424 | $chain = "GROUP-${group}-OUT"; |
9d31b418 | 425 | |
3fa83edf | 426 | ruleset_create_chain($ruleset, $chain); |
9d31b418 | 427 | |
3fa83edf DM |
428 | if ($rules->{out}) { |
429 | foreach my $rule (@{$rules->{out}}) { | |
430 | # we go the BRIDGEFW-IN because we need to check also other tap rules | |
431 | # (and group rules can be set on any bridge, so we can't go to VMBRXX-IN) | |
9d31b418 | 432 | $rule->{action} = 'BRIDGEFW-IN' if $rule->{action} eq 'ACCEPT'; |
3fa83edf | 433 | ruleset_generate_rule($rule, $chain, $rule); |
9d31b418 AD |
434 | } |
435 | } | |
9d31b418 AD |
436 | } |
437 | ||
5e1267a5 | 438 | sub parse_fw_rules { |
9d31b418 | 439 | my ($filename, $fh, $group) = @_; |
5e1267a5 DM |
440 | |
441 | my $section; | |
9d31b418 AD |
442 | my $securitygroup; |
443 | my $securitygroupexist; | |
5e1267a5 DM |
444 | |
445 | my $res = { in => [], out => [] }; | |
446 | ||
a332200b | 447 | my $macros = get_firewall_macros(); |
fcba0beb DM |
448 | my $protocols = get_etc_protocols(); |
449 | ||
5e1267a5 DM |
450 | while (defined(my $line = <$fh>)) { |
451 | next if $line =~ m/^#/; | |
452 | next if $line =~ m/^\s*$/; | |
453 | ||
9d31b418 | 454 | if ($line =~ m/^\[(in|out)(:(\S+))?\]\s*$/i) { |
5e1267a5 | 455 | $section = lc($1); |
9d31b418 AD |
456 | $securitygroup = lc($3) if $3; |
457 | $securitygroupexist = 1 if $securitygroup && $securitygroup eq $group; | |
5e1267a5 DM |
458 | next; |
459 | } | |
460 | next if !$section; | |
9d31b418 | 461 | next if $group && $securitygroup ne $group; |
5e1267a5 DM |
462 | |
463 | my ($action, $iface, $source, $dest, $proto, $dport, $sport) = | |
464 | split(/\s+/, $line); | |
465 | ||
466 | if (!$action) { | |
467 | warn "skip incomplete line\n"; | |
468 | next; | |
469 | } | |
470 | ||
471 | my $service; | |
3a616aa0 | 472 | if ($action =~ m/^(ACCEPT|DROP|REJECT|GROUP-(\S+))$/) { |
5e1267a5 DM |
473 | # OK |
474 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
475 | ($service, $action) = ($1, $2); | |
476 | if (!$macros->{$service}) { | |
477 | warn "unknown service '$service'\n"; | |
478 | next; | |
479 | } | |
480 | } else { | |
481 | warn "unknown action '$action'\n"; | |
482 | next; | |
483 | } | |
484 | ||
485 | $iface = undef if $iface && $iface eq '-'; | |
486 | if ($iface && $iface !~ m/^(net0|net1|net2|net3|net4|net5)$/) { | |
487 | warn "unknown interface '$iface'\n"; | |
488 | next; | |
489 | } | |
490 | ||
491 | $proto = undef if $proto && $proto eq '-'; | |
fcba0beb DM |
492 | if ($proto && !(defined($protocols->{byname}->{$proto}) || |
493 | defined($protocols->{byid}->{$proto}))) { | |
5e1267a5 DM |
494 | warn "unknown protokol '$proto'\n"; |
495 | next; | |
496 | } | |
497 | ||
498 | $source = undef if $source && $source eq '-'; | |
5e1267a5 | 499 | $dest = undef if $dest && $dest eq '-'; |
5e1267a5 DM |
500 | |
501 | $dport = undef if $dport && $dport eq '-'; | |
502 | $sport = undef if $sport && $sport eq '-'; | |
4cdbb3b7 AD |
503 | my $nbdport = undef; |
504 | my $nbsport = undef; | |
d6de1dc2 AD |
505 | my $nbsource = undef; |
506 | my $nbdest = undef; | |
5e1267a5 | 507 | |
ecbea048 | 508 | eval { |
d6de1dc2 AD |
509 | $nbsource = parse_address_list($source) if $source; |
510 | $nbdest = parse_address_list($dest) if $dest; | |
4cdbb3b7 AD |
511 | $nbdport = parse_port_name_number_or_range($dport) if $dport; |
512 | $nbsport = parse_port_name_number_or_range($sport) if $sport; | |
ecbea048 DM |
513 | }; |
514 | if (my $err = $@) { | |
515 | warn $err; | |
516 | next; | |
517 | ||
518 | } | |
519 | ||
520 | ||
5e1267a5 DM |
521 | my $rule = { |
522 | action => $action, | |
523 | service => $service, | |
524 | iface => $iface, | |
525 | source => $source, | |
526 | dest => $dest, | |
d6de1dc2 AD |
527 | nbsource => $nbsource, |
528 | nbdest => $nbdest, | |
5e1267a5 DM |
529 | proto => $proto, |
530 | dport => $dport, | |
531 | sport => $sport, | |
4cdbb3b7 AD |
532 | nbdport => $nbdport, |
533 | nbsport => $nbsport, | |
534 | ||
5e1267a5 DM |
535 | }; |
536 | ||
537 | push @{$res->{$section}}, $rule; | |
538 | } | |
539 | ||
9d31b418 | 540 | die "security group $group don't exist" if $group && !$securitygroupexist; |
5e1267a5 DM |
541 | return $res; |
542 | } | |
543 | ||
06320eb0 DM |
544 | sub run_locked { |
545 | my ($code, @param) = @_; | |
546 | ||
547 | my $timeout = 10; | |
548 | ||
549 | my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param); | |
550 | ||
551 | die $@ if $@; | |
552 | ||
553 | return $res; | |
554 | } | |
555 | ||
5e1267a5 DM |
556 | sub read_local_vm_config { |
557 | ||
558 | my $openvz = {}; | |
559 | ||
560 | my $qemu = {}; | |
561 | ||
562 | my $list = PVE::QemuServer::config_list(); | |
563 | ||
564 | foreach my $vmid (keys %$list) { | |
5e1267a5 DM |
565 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); |
566 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
567 | $qemu->{$vmid} = $conf; | |
568 | } | |
569 | } | |
570 | ||
571 | my $vmdata = { openvz => $openvz, qemu => $qemu }; | |
572 | ||
573 | return $vmdata; | |
574 | }; | |
575 | ||
576 | sub read_vm_firewall_rules { | |
577 | my ($vmdata) = @_; | |
578 | my $rules = {}; | |
579 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { | |
580 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
581 | my $fh = IO::File->new($filename, O_RDONLY); | |
582 | next if !$fh; | |
583 | ||
584 | $rules->{$vmid} = parse_fw_rules($filename, $fh); | |
585 | } | |
586 | ||
587 | return $rules; | |
588 | } | |
589 | ||
590 | sub compile { | |
5e1267a5 DM |
591 | my $vmdata = read_local_vm_config(); |
592 | my $rules = read_vm_firewall_rules($vmdata); | |
593 | ||
3fa83edf DM |
594 | #print Dumper($rules); |
595 | ||
596 | my $ruleset = {}; | |
597 | ||
598 | # setup host firewall rules | |
599 | ruleset_create_chain($ruleset, "proxmoxfw-INPUT"); | |
600 | ruleset_create_chain($ruleset, "proxmoxfw-OUTPUT"); | |
601 | ||
602 | enablehostfw($ruleset); | |
603 | ||
604 | # generate firewall rules for QEMU VMs | |
605 | foreach my $vmid (keys %{$vmdata->{qemu}}) { | |
606 | my $conf = $vmdata->{qemu}->{$vmid}; | |
607 | next if !$rules->{$vmid}; | |
608 | ||
609 | foreach my $netid (keys %$conf) { | |
610 | next if $netid !~ m/^net(\d+)$/; | |
611 | my $net = PVE::QemuServer::parse_net($conf->{$netid}); | |
612 | next if !$net; | |
613 | my $iface = "tap${vmid}i$1"; | |
5e1267a5 | 614 | |
3fa83edf DM |
615 | my $bridge = $net->{bridge}; |
616 | next if !$bridge; # fixme: ? | |
617 | ||
618 | $bridge .= "v$net->{tag}" if $net->{tag}; | |
619 | ||
620 | generate_bridge_chains($ruleset, $bridge); | |
621 | ||
622 | generate_tap_rules_direction($ruleset, $iface, $netid, $rules->{$vmid}->{in}, $bridge, 'IN'); | |
623 | generate_tap_rules_direction($ruleset, $iface, $netid, $rules->{$vmid}->{out}, $bridge, 'OUT'); | |
624 | } | |
625 | } | |
3fa83edf DM |
626 | return $ruleset; |
627 | } | |
628 | ||
629 | sub get_ruleset_status { | |
630 | my ($ruleset, $verbose) = @_; | |
631 | ||
632 | my $active_chains = iptables_get_chains(); | |
633 | ||
634 | my $statushash = {}; | |
635 | ||
636 | foreach my $chain (sort keys %$ruleset) { | |
637 | my $digest = Digest::MD5->new(); | |
638 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
639 | $digest->add("$cmd\n"); | |
640 | } | |
641 | my $sig = $digest->b64digest; | |
642 | $statushash->{$chain}->{sig} = $sig; | |
643 | ||
644 | my $oldsig = $active_chains->{$chain}; | |
645 | if (!defined($oldsig)) { | |
646 | $statushash->{$chain}->{action} = 'create'; | |
647 | } else { | |
648 | if ($oldsig eq $sig) { | |
649 | $statushash->{$chain}->{action} = 'exists'; | |
650 | } else { | |
651 | $statushash->{$chain}->{action} = 'update'; | |
652 | } | |
653 | } | |
654 | print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose; | |
655 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
656 | print "\t$cmd\n" if $verbose; | |
657 | } | |
658 | } | |
659 | ||
660 | foreach my $chain (sort keys %$active_chains) { | |
661 | if (!defined($ruleset->{$chain})) { | |
662 | my $sig = $active_chains->{$chain}; | |
663 | $statushash->{$chain}->{action} = 'delete'; | |
664 | $statushash->{$chain}->{sig} = $sig; | |
665 | print "delete $chain ($sig)\n" if $verbose; | |
666 | } | |
667 | } | |
668 | ||
669 | return $statushash; | |
670 | } | |
671 | ||
672 | sub print_ruleset { | |
673 | my ($ruleset) = @_; | |
674 | ||
675 | get_ruleset_status($ruleset, 1); | |
676 | } | |
677 | ||
678 | sub print_sig_rule { | |
679 | my ($chain, $sig) = @_; | |
680 | ||
681 | # Note: This rule should never match! We just use this hack to store a SHA1 checksum | |
682 | # used to detect changes | |
683 | return "-A $chain -j LOG --log-prefix \"PVESIG:$sig\" -p tcp -s \"127.128.129.130\" --dport 1\n"; | |
b6360c3f DM |
684 | } |
685 | ||
5e1267a5 | 686 | sub compile_and_start { |
3fa83edf DM |
687 | my ($verbose) = @_; |
688 | ||
689 | my $ruleset = compile(); | |
690 | ||
691 | my $cmdlist = "*filter\n"; # we pass this to iptables-restore; | |
692 | ||
693 | my $statushash = get_ruleset_status($ruleset, $verbose); | |
694 | ||
695 | # create missing chains first | |
696 | foreach my $chain (sort keys %$ruleset) { | |
697 | my $stat = $statushash->{$chain}; | |
698 | die "internal error" if !$stat; | |
699 | next if $stat->{action} ne 'create'; | |
886aba9c | 700 | |
3fa83edf DM |
701 | $cmdlist .= ":$chain - [0:0]\n"; |
702 | } | |
703 | ||
704 | my $rule = "INPUT -j proxmoxfw-INPUT"; | |
705 | if (!PVE::Firewall::iptables_rule_exist($rule)) { | |
706 | $cmdlist .= "-A $rule\n"; | |
707 | } | |
708 | $rule = "OUTPUT -j proxmoxfw-OUTPUT"; | |
709 | if (!PVE::Firewall::iptables_rule_exist($rule)) { | |
710 | $cmdlist .= "-A $rule\n"; | |
711 | } | |
712 | ||
713 | $rule = "FORWARD -j proxmoxfw-FORWARD"; | |
714 | if (!PVE::Firewall::iptables_rule_exist($rule)) { | |
715 | $cmdlist .= "-A $rule\n"; | |
716 | } | |
717 | ||
718 | foreach my $chain (sort keys %$ruleset) { | |
719 | my $stat = $statushash->{$chain}; | |
720 | die "internal error" if !$stat; | |
721 | ||
722 | if ($stat->{action} eq 'update' || $stat->{action} eq 'create') { | |
723 | $cmdlist .= "-F $chain\n"; | |
724 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
725 | $cmdlist .= "$cmd\n"; | |
726 | } | |
727 | $cmdlist .= print_sig_rule($chain, $stat->{sig}); | |
728 | } elsif ($stat->{action} eq 'delete') { | |
729 | $cmdlist .= "-F $chain\n"; | |
730 | $cmdlist .= "-X $chain\n"; | |
731 | } elsif ($stat->{action} eq 'exists') { | |
732 | # do nothing | |
733 | } else { | |
734 | die "internal error - unknown status '$stat->{action}'"; | |
735 | } | |
736 | } | |
737 | ||
738 | $cmdlist .= "COMMIT\n"; | |
739 | ||
740 | print $cmdlist if $verbose; | |
741 | ||
742 | iptables_restore_cmdlist($cmdlist); | |
743 | ||
744 | # test: re-read status and check if everything is up to date | |
745 | $statushash = get_ruleset_status($ruleset); | |
746 | ||
747 | my $errors; | |
748 | foreach my $chain (sort keys %$ruleset) { | |
749 | my $stat = $statushash->{$chain}; | |
750 | if ($stat->{action} ne 'exists') { | |
751 | warn "unable to update chain '$chain'\n"; | |
752 | $errors = 1; | |
753 | } | |
754 | } | |
b6360c3f | 755 | |
3fa83edf | 756 | die "unable to apply firewall changes\n" if $errors; |
b6360c3f DM |
757 | } |
758 | ||
b6360c3f | 759 | 1; |