Commit | Line | Data |
---|---|---|
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 | ||
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 DM |
201 | $res->{$chain} = "unknown"; |
202 | } elsif ($line =~ m/^-A\s+(\S+)\s.*--log-prefix\s+\"PVESIG:(\S+)\"/) { | |
203 | my ($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 $@; | |
235 | ||
236 | return 1; | |
237 | } | |
238 | ||
3fa83edf DM |
239 | sub ruleset_generate_rule { |
240 | my ($ruleset, $chain, $rule) = @_; | |
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 AD |
252 | $cmd .= " --sport $rule->{sport}" if $rule->{sport}; |
253 | $cmd .= " -j $rule->{action}" if $rule->{action}; | |
254 | ||
3fa83edf DM |
255 | ruleset_addrule($ruleset, $chain, $cmd) if $cmd; |
256 | } | |
257 | ||
258 | sub ruleset_create_chain { | |
259 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 260 | |
3fa83edf DM |
261 | die "chain '$chain' already exists\n" if $ruleset->{$chain}; |
262 | ||
263 | $ruleset->{$chain} = []; | |
3a616aa0 AD |
264 | } |
265 | ||
3fa83edf DM |
266 | sub ruleset_chain_exist { |
267 | my ($ruleset, $chain) = @_; | |
3a616aa0 | 268 | |
3fa83edf DM |
269 | return $ruleset->{$chain} ? 1 : undef; |
270 | } | |
3a616aa0 | 271 | |
3fa83edf DM |
272 | sub ruleset_addrule { |
273 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 274 | |
3fa83edf | 275 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 276 | |
3fa83edf DM |
277 | push @{$ruleset->{$chain}}, "-A $chain $rule"; |
278 | } | |
3a616aa0 | 279 | |
3fa83edf DM |
280 | sub ruleset_insertrule { |
281 | my ($ruleset, $chain, $rule) = @_; | |
3a616aa0 | 282 | |
3fa83edf | 283 | die "no such chain '$chain'\n" if !$ruleset->{$chain}; |
3a616aa0 | 284 | |
3fa83edf DM |
285 | unshift @{$ruleset->{$chain}}, "-A $chain $rule"; |
286 | } | |
3a616aa0 | 287 | |
3fa83edf DM |
288 | sub generate_bridge_chains { |
289 | my ($ruleset, $bridge) = @_; | |
3a616aa0 | 290 | |
dec84fcd DM |
291 | if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-IN")){ |
292 | ruleset_create_chain($ruleset, "PVEFW-BRIDGE-IN"); | |
d4d0fd1d AD |
293 | } |
294 | ||
dec84fcd DM |
295 | if (!ruleset_chain_exist($ruleset, "PVEFW-BRIDGE-OUT")){ |
296 | ruleset_create_chain($ruleset, "PVEFW-BRIDGE-OUT"); | |
d4d0fd1d | 297 | } |
3fa83edf | 298 | |
dec84fcd DM |
299 | if (!ruleset_chain_exist($ruleset, "PVEFW-FORWARD")){ |
300 | ruleset_create_chain($ruleset, "PVEFW-FORWARD"); | |
3fa83edf | 301 | |
dec84fcd DM |
302 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m state --state RELATED,ESTABLISHED -j ACCEPT"); |
303 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-in --physdev-is-bridged -j PVEFW-BRIDGE-OUT"); | |
304 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-out --physdev-is-bridged -j PVEFW-BRIDGE-IN"); | |
3a616aa0 AD |
305 | } |
306 | ||
3fa83edf DM |
307 | if (!ruleset_chain_exist($ruleset, "$bridge-IN")) { |
308 | ruleset_create_chain($ruleset, "$bridge-IN"); | |
dec84fcd DM |
309 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -j DROP"); # disable interbridge routing |
310 | ruleset_addrule($ruleset, "PVEFW-BRIDGE-IN", "-j $bridge-IN"); | |
3fa83edf DM |
311 | ruleset_addrule($ruleset, "$bridge-IN", "-j ACCEPT"); |
312 | } | |
3a616aa0 | 313 | |
3fa83edf DM |
314 | if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) { |
315 | ruleset_create_chain($ruleset, "$bridge-OUT"); | |
dec84fcd DM |
316 | ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -j DROP"); # disable interbridge routing |
317 | ruleset_addrule($ruleset, "PVEFW-BRIDGE-OUT", "-j $bridge-OUT"); | |
3fa83edf DM |
318 | } |
319 | } | |
3a616aa0 AD |
320 | |
321 | sub generate_tap_rules_direction { | |
c29f55c9 | 322 | my ($ruleset, $iface, $netid, $macaddr, $rules, $bridge, $direction) = @_; |
3a616aa0 AD |
323 | |
324 | my $tapchain = "$iface-$direction"; | |
325 | ||
3fa83edf | 326 | ruleset_create_chain($ruleset, $tapchain); |
3a616aa0 | 327 | |
3fa83edf DM |
328 | ruleset_addrule($ruleset, $tapchain, "-m state --state INVALID -j DROP"); |
329 | ruleset_addrule($ruleset, $tapchain, "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
3a616aa0 | 330 | |
c29f55c9 DM |
331 | if ($direction eq 'OUT' && defined($macaddr)) { |
332 | ruleset_addrule($ruleset, $tapchain, "-m mac ! --mac-source $macaddr -j DROP"); | |
333 | } | |
334 | ||
3fa83edf | 335 | if ($rules) { |
3a616aa0 AD |
336 | foreach my $rule (@$rules) { |
337 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
338 | if($rule->{action} =~ m/^(GROUP-(\S+))$/){ | |
3fa83edf DM |
339 | $rule->{action} .= "-$direction"; |
340 | # generate empty group rule if don't exist | |
341 | if(!ruleset_chain_exist($ruleset, $rule->{action})){ | |
342 | generate_group_rules($ruleset, $2); | |
343 | } | |
3a616aa0 | 344 | } |
3fa83edf | 345 | # we go to vmbr-IN if accept in out rules |
3a616aa0 | 346 | $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT'; |
3fa83edf | 347 | ruleset_generate_rule($ruleset, $tapchain, $rule); |
3a616aa0 AD |
348 | } |
349 | } | |
350 | ||
3fa83edf DM |
351 | ruleset_addrule($ruleset, $tapchain, "-j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4"); |
352 | ruleset_addrule($ruleset, $tapchain, "-j DROP"); | |
3a616aa0 | 353 | |
3fa83edf DM |
354 | # plug the tap chain to bridge chain |
355 | my $physdevdirection = $direction eq 'IN' ? "out" : "in"; | |
356 | my $rule = "-m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain"; | |
357 | ruleset_insertrule($ruleset, "$bridge-$direction", $rule); | |
3a616aa0 | 358 | |
3fa83edf DM |
359 | if ($direction eq 'OUT'){ |
360 | # add tap->host rules | |
361 | my $rule = "-m physdev --physdev-$physdevdirection $iface -j $tapchain"; | |
dec84fcd | 362 | ruleset_addrule($ruleset, "PVEFW-INPUT", $rule); |
3a616aa0 AD |
363 | } |
364 | } | |
365 | ||
0bd5f137 | 366 | sub enablehostfw { |
3fa83edf | 367 | my ($ruleset) = @_; |
0bd5f137 AD |
368 | |
369 | my $filename = "/etc/pve/local/host.fw"; | |
370 | my $fh = IO::File->new($filename, O_RDONLY); | |
371 | return if !$fh; | |
372 | ||
373 | my $rules = parse_fw_rules($filename, $fh); | |
0bd5f137 | 374 | |
3fa83edf | 375 | # host inbound firewall |
dec84fcd DM |
376 | my $chain = "PVEFW-HOST-IN"; |
377 | ruleset_create_chain($ruleset, $chain); | |
0bd5f137 | 378 | |
dec84fcd DM |
379 | ruleset_addrule($ruleset, $chain, "-m state --state INVALID -j DROP"); |
380 | ruleset_addrule($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
381 | ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT"); | |
382 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
383 | ruleset_addrule($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT"); | |
384 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
0bd5f137 | 385 | |
3fa83edf DM |
386 | if ($rules->{in}) { |
387 | foreach my $rule (@{$rules->{in}}) { | |
388 | # we use RETURN because we need to check also tap rules | |
389 | $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT'; | |
dec84fcd | 390 | ruleset_generate_rule($ruleset, $chain, $rule); |
3fa83edf | 391 | } |
0bd5f137 AD |
392 | } |
393 | ||
dec84fcd DM |
394 | ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4"); |
395 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
0bd5f137 | 396 | |
3fa83edf | 397 | # host outbound firewall |
aadd745e | 398 | $chain = "PVEFW-HOST-OUT"; |
dec84fcd DM |
399 | ruleset_create_chain($ruleset, $chain); |
400 | ||
401 | ruleset_addrule($ruleset, $chain, "-m state --state INVALID -j DROP"); | |
402 | ruleset_addrule($ruleset, $chain, "-m state --state RELATED,ESTABLISHED -j ACCEPT"); | |
403 | ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT"); | |
404 | ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT"); | |
405 | ruleset_addrule($ruleset, $chain, "-p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT"); | |
406 | ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync | |
0bd5f137 | 407 | |
3fa83edf DM |
408 | if ($rules->{out}) { |
409 | foreach my $rule (@{$rules->{out}}) { | |
410 | # we use RETURN because we need to check also tap rules | |
411 | $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT'; | |
dec84fcd | 412 | ruleset_generate_rule($ruleset, $chain, $rule); |
3fa83edf | 413 | } |
0bd5f137 AD |
414 | } |
415 | ||
dec84fcd DM |
416 | ruleset_addrule($ruleset, $chain, "-j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4"); |
417 | ruleset_addrule($ruleset, $chain, "-j DROP"); | |
9d31b418 | 418 | |
dec84fcd DM |
419 | ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT"); |
420 | ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN"); | |
9d31b418 AD |
421 | } |
422 | ||
423 | sub generate_group_rules { | |
3fa83edf | 424 | my ($ruleset, $group) = @_; |
9d31b418 AD |
425 | |
426 | my $filename = "/etc/pve/firewall/groups.fw"; | |
427 | my $fh = IO::File->new($filename, O_RDONLY); | |
428 | return if !$fh; | |
429 | ||
430 | my $rules = parse_fw_rules($filename, $fh, $group); | |
9d31b418 | 431 | |
3fa83edf | 432 | my $chain = "GROUP-${group}-IN"; |
9d31b418 | 433 | |
3fa83edf | 434 | ruleset_create_chain($ruleset, $chain); |
9d31b418 | 435 | |
3fa83edf DM |
436 | if ($rules->{in}) { |
437 | foreach my $rule (@{$rules->{in}}) { | |
438 | ruleset_generate_rule($ruleset, $chain, $rule); | |
9d31b418 AD |
439 | } |
440 | } | |
441 | ||
3fa83edf | 442 | $chain = "GROUP-${group}-OUT"; |
9d31b418 | 443 | |
3fa83edf | 444 | ruleset_create_chain($ruleset, $chain); |
9d31b418 | 445 | |
3fa83edf DM |
446 | if ($rules->{out}) { |
447 | foreach my $rule (@{$rules->{out}}) { | |
dec84fcd | 448 | # we go the PVEFW-BRIDGE-IN because we need to check also other tap rules |
3fa83edf | 449 | # (and group rules can be set on any bridge, so we can't go to VMBRXX-IN) |
dec84fcd | 450 | $rule->{action} = 'PVEFW-BRIDGE-IN' if $rule->{action} eq 'ACCEPT'; |
3fa83edf | 451 | ruleset_generate_rule($rule, $chain, $rule); |
9d31b418 AD |
452 | } |
453 | } | |
9d31b418 AD |
454 | } |
455 | ||
5e1267a5 | 456 | sub parse_fw_rules { |
9d31b418 | 457 | my ($filename, $fh, $group) = @_; |
5e1267a5 DM |
458 | |
459 | my $section; | |
9d31b418 AD |
460 | my $securitygroup; |
461 | my $securitygroupexist; | |
5e1267a5 DM |
462 | |
463 | my $res = { in => [], out => [] }; | |
464 | ||
a332200b | 465 | my $macros = get_firewall_macros(); |
fcba0beb DM |
466 | my $protocols = get_etc_protocols(); |
467 | ||
5e1267a5 DM |
468 | while (defined(my $line = <$fh>)) { |
469 | next if $line =~ m/^#/; | |
470 | next if $line =~ m/^\s*$/; | |
471 | ||
9d31b418 | 472 | if ($line =~ m/^\[(in|out)(:(\S+))?\]\s*$/i) { |
5e1267a5 | 473 | $section = lc($1); |
9d31b418 AD |
474 | $securitygroup = lc($3) if $3; |
475 | $securitygroupexist = 1 if $securitygroup && $securitygroup eq $group; | |
5e1267a5 DM |
476 | next; |
477 | } | |
478 | next if !$section; | |
9d31b418 | 479 | next if $group && $securitygroup ne $group; |
5e1267a5 DM |
480 | |
481 | my ($action, $iface, $source, $dest, $proto, $dport, $sport) = | |
482 | split(/\s+/, $line); | |
483 | ||
484 | if (!$action) { | |
485 | warn "skip incomplete line\n"; | |
486 | next; | |
487 | } | |
488 | ||
489 | my $service; | |
3a616aa0 | 490 | if ($action =~ m/^(ACCEPT|DROP|REJECT|GROUP-(\S+))$/) { |
5e1267a5 DM |
491 | # OK |
492 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
493 | ($service, $action) = ($1, $2); | |
494 | if (!$macros->{$service}) { | |
495 | warn "unknown service '$service'\n"; | |
496 | next; | |
497 | } | |
498 | } else { | |
499 | warn "unknown action '$action'\n"; | |
500 | next; | |
501 | } | |
502 | ||
503 | $iface = undef if $iface && $iface eq '-'; | |
504 | if ($iface && $iface !~ m/^(net0|net1|net2|net3|net4|net5)$/) { | |
505 | warn "unknown interface '$iface'\n"; | |
506 | next; | |
507 | } | |
508 | ||
509 | $proto = undef if $proto && $proto eq '-'; | |
fcba0beb DM |
510 | if ($proto && !(defined($protocols->{byname}->{$proto}) || |
511 | defined($protocols->{byid}->{$proto}))) { | |
5e1267a5 DM |
512 | warn "unknown protokol '$proto'\n"; |
513 | next; | |
514 | } | |
515 | ||
516 | $source = undef if $source && $source eq '-'; | |
5e1267a5 | 517 | $dest = undef if $dest && $dest eq '-'; |
5e1267a5 DM |
518 | |
519 | $dport = undef if $dport && $dport eq '-'; | |
520 | $sport = undef if $sport && $sport eq '-'; | |
4cdbb3b7 AD |
521 | my $nbdport = undef; |
522 | my $nbsport = undef; | |
d6de1dc2 AD |
523 | my $nbsource = undef; |
524 | my $nbdest = undef; | |
5e1267a5 | 525 | |
ecbea048 | 526 | eval { |
d6de1dc2 AD |
527 | $nbsource = parse_address_list($source) if $source; |
528 | $nbdest = parse_address_list($dest) if $dest; | |
4cdbb3b7 AD |
529 | $nbdport = parse_port_name_number_or_range($dport) if $dport; |
530 | $nbsport = parse_port_name_number_or_range($sport) if $sport; | |
ecbea048 DM |
531 | }; |
532 | if (my $err = $@) { | |
533 | warn $err; | |
534 | next; | |
535 | ||
536 | } | |
537 | ||
538 | ||
5e1267a5 DM |
539 | my $rule = { |
540 | action => $action, | |
541 | service => $service, | |
542 | iface => $iface, | |
543 | source => $source, | |
544 | dest => $dest, | |
d6de1dc2 AD |
545 | nbsource => $nbsource, |
546 | nbdest => $nbdest, | |
5e1267a5 DM |
547 | proto => $proto, |
548 | dport => $dport, | |
549 | sport => $sport, | |
4cdbb3b7 AD |
550 | nbdport => $nbdport, |
551 | nbsport => $nbsport, | |
552 | ||
5e1267a5 DM |
553 | }; |
554 | ||
555 | push @{$res->{$section}}, $rule; | |
556 | } | |
557 | ||
9d31b418 | 558 | die "security group $group don't exist" if $group && !$securitygroupexist; |
5e1267a5 DM |
559 | return $res; |
560 | } | |
561 | ||
06320eb0 DM |
562 | sub run_locked { |
563 | my ($code, @param) = @_; | |
564 | ||
565 | my $timeout = 10; | |
566 | ||
567 | my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param); | |
568 | ||
569 | die $@ if $@; | |
570 | ||
571 | return $res; | |
572 | } | |
573 | ||
5e1267a5 DM |
574 | sub read_local_vm_config { |
575 | ||
576 | my $openvz = {}; | |
577 | ||
578 | my $qemu = {}; | |
579 | ||
580 | my $list = PVE::QemuServer::config_list(); | |
581 | ||
582 | foreach my $vmid (keys %$list) { | |
5e1267a5 DM |
583 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); |
584 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
585 | $qemu->{$vmid} = $conf; | |
586 | } | |
587 | } | |
588 | ||
589 | my $vmdata = { openvz => $openvz, qemu => $qemu }; | |
590 | ||
591 | return $vmdata; | |
592 | }; | |
593 | ||
594 | sub read_vm_firewall_rules { | |
595 | my ($vmdata) = @_; | |
596 | my $rules = {}; | |
597 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { | |
598 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
599 | my $fh = IO::File->new($filename, O_RDONLY); | |
600 | next if !$fh; | |
601 | ||
602 | $rules->{$vmid} = parse_fw_rules($filename, $fh); | |
603 | } | |
604 | ||
605 | return $rules; | |
606 | } | |
607 | ||
608 | sub compile { | |
5e1267a5 DM |
609 | my $vmdata = read_local_vm_config(); |
610 | my $rules = read_vm_firewall_rules($vmdata); | |
611 | ||
3fa83edf DM |
612 | #print Dumper($rules); |
613 | ||
614 | my $ruleset = {}; | |
615 | ||
616 | # setup host firewall rules | |
dec84fcd DM |
617 | ruleset_create_chain($ruleset, "PVEFW-INPUT"); |
618 | ruleset_create_chain($ruleset, "PVEFW-OUTPUT"); | |
3fa83edf DM |
619 | |
620 | enablehostfw($ruleset); | |
621 | ||
622 | # generate firewall rules for QEMU VMs | |
623 | foreach my $vmid (keys %{$vmdata->{qemu}}) { | |
624 | my $conf = $vmdata->{qemu}->{$vmid}; | |
625 | next if !$rules->{$vmid}; | |
626 | ||
627 | foreach my $netid (keys %$conf) { | |
628 | next if $netid !~ m/^net(\d+)$/; | |
629 | my $net = PVE::QemuServer::parse_net($conf->{$netid}); | |
630 | next if !$net; | |
631 | my $iface = "tap${vmid}i$1"; | |
5e1267a5 | 632 | |
3fa83edf DM |
633 | my $bridge = $net->{bridge}; |
634 | next if !$bridge; # fixme: ? | |
635 | ||
636 | $bridge .= "v$net->{tag}" if $net->{tag}; | |
637 | ||
638 | generate_bridge_chains($ruleset, $bridge); | |
639 | ||
c29f55c9 DM |
640 | my $macaddr = $net->{macaddr}; |
641 | generate_tap_rules_direction($ruleset, $iface, $netid, $macaddr, $rules->{$vmid}->{in}, $bridge, 'IN'); | |
642 | generate_tap_rules_direction($ruleset, $iface, $netid, $macaddr, $rules->{$vmid}->{out}, $bridge, 'OUT'); | |
3fa83edf DM |
643 | } |
644 | } | |
3fa83edf DM |
645 | return $ruleset; |
646 | } | |
647 | ||
648 | sub get_ruleset_status { | |
649 | my ($ruleset, $verbose) = @_; | |
650 | ||
651 | my $active_chains = iptables_get_chains(); | |
652 | ||
653 | my $statushash = {}; | |
654 | ||
655 | foreach my $chain (sort keys %$ruleset) { | |
656 | my $digest = Digest::MD5->new(); | |
657 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
658 | $digest->add("$cmd\n"); | |
659 | } | |
660 | my $sig = $digest->b64digest; | |
661 | $statushash->{$chain}->{sig} = $sig; | |
662 | ||
663 | my $oldsig = $active_chains->{$chain}; | |
664 | if (!defined($oldsig)) { | |
665 | $statushash->{$chain}->{action} = 'create'; | |
666 | } else { | |
667 | if ($oldsig eq $sig) { | |
668 | $statushash->{$chain}->{action} = 'exists'; | |
669 | } else { | |
670 | $statushash->{$chain}->{action} = 'update'; | |
671 | } | |
672 | } | |
673 | print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose; | |
674 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
675 | print "\t$cmd\n" if $verbose; | |
676 | } | |
677 | } | |
678 | ||
679 | foreach my $chain (sort keys %$active_chains) { | |
680 | if (!defined($ruleset->{$chain})) { | |
681 | my $sig = $active_chains->{$chain}; | |
682 | $statushash->{$chain}->{action} = 'delete'; | |
683 | $statushash->{$chain}->{sig} = $sig; | |
684 | print "delete $chain ($sig)\n" if $verbose; | |
685 | } | |
686 | } | |
687 | ||
688 | return $statushash; | |
689 | } | |
690 | ||
691 | sub print_ruleset { | |
692 | my ($ruleset) = @_; | |
693 | ||
694 | get_ruleset_status($ruleset, 1); | |
695 | } | |
696 | ||
697 | sub print_sig_rule { | |
698 | my ($chain, $sig) = @_; | |
699 | ||
700 | # Note: This rule should never match! We just use this hack to store a SHA1 checksum | |
701 | # used to detect changes | |
702 | return "-A $chain -j LOG --log-prefix \"PVESIG:$sig\" -p tcp -s \"127.128.129.130\" --dport 1\n"; | |
b6360c3f DM |
703 | } |
704 | ||
5e1267a5 | 705 | sub compile_and_start { |
3fa83edf DM |
706 | my ($verbose) = @_; |
707 | ||
708 | my $ruleset = compile(); | |
709 | ||
710 | my $cmdlist = "*filter\n"; # we pass this to iptables-restore; | |
711 | ||
712 | my $statushash = get_ruleset_status($ruleset, $verbose); | |
713 | ||
714 | # create missing chains first | |
715 | foreach my $chain (sort keys %$ruleset) { | |
716 | my $stat = $statushash->{$chain}; | |
717 | die "internal error" if !$stat; | |
718 | next if $stat->{action} ne 'create'; | |
886aba9c | 719 | |
3fa83edf DM |
720 | $cmdlist .= ":$chain - [0:0]\n"; |
721 | } | |
722 | ||
dec84fcd | 723 | my $rule = "INPUT -j PVEFW-INPUT"; |
3fa83edf DM |
724 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
725 | $cmdlist .= "-A $rule\n"; | |
726 | } | |
dec84fcd | 727 | $rule = "OUTPUT -j PVEFW-OUTPUT"; |
3fa83edf DM |
728 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
729 | $cmdlist .= "-A $rule\n"; | |
730 | } | |
731 | ||
dec84fcd | 732 | $rule = "FORWARD -j PVEFW-FORWARD"; |
3fa83edf DM |
733 | if (!PVE::Firewall::iptables_rule_exist($rule)) { |
734 | $cmdlist .= "-A $rule\n"; | |
735 | } | |
736 | ||
737 | foreach my $chain (sort keys %$ruleset) { | |
738 | my $stat = $statushash->{$chain}; | |
739 | die "internal error" if !$stat; | |
740 | ||
741 | if ($stat->{action} eq 'update' || $stat->{action} eq 'create') { | |
742 | $cmdlist .= "-F $chain\n"; | |
743 | foreach my $cmd (@{$ruleset->{$chain}}) { | |
744 | $cmdlist .= "$cmd\n"; | |
745 | } | |
746 | $cmdlist .= print_sig_rule($chain, $stat->{sig}); | |
747 | } elsif ($stat->{action} eq 'delete') { | |
748 | $cmdlist .= "-F $chain\n"; | |
749 | $cmdlist .= "-X $chain\n"; | |
750 | } elsif ($stat->{action} eq 'exists') { | |
751 | # do nothing | |
752 | } else { | |
753 | die "internal error - unknown status '$stat->{action}'"; | |
754 | } | |
755 | } | |
756 | ||
757 | $cmdlist .= "COMMIT\n"; | |
758 | ||
759 | print $cmdlist if $verbose; | |
760 | ||
761 | iptables_restore_cmdlist($cmdlist); | |
762 | ||
763 | # test: re-read status and check if everything is up to date | |
764 | $statushash = get_ruleset_status($ruleset); | |
765 | ||
766 | my $errors; | |
767 | foreach my $chain (sort keys %$ruleset) { | |
768 | my $stat = $statushash->{$chain}; | |
769 | if ($stat->{action} ne 'exists') { | |
770 | warn "unable to update chain '$chain'\n"; | |
771 | $errors = 1; | |
772 | } | |
773 | } | |
b6360c3f | 774 | |
3fa83edf | 775 | die "unable to apply firewall changes\n" if $errors; |
b6360c3f DM |
776 | } |
777 | ||
b6360c3f | 778 | 1; |