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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; | |
f789653a | 6 | use PVE::Tools; |
b6360c3f | 7 | use PVE::QemuServer; |
5e1267a5 DM |
8 | use File::Path; |
9 | use IO::File; | |
10 | use Data::Dumper; | |
b6360c3f | 11 | |
9aab3127 DM |
12 | my $macros; |
13 | sub get_shorewall_macros { | |
14 | ||
15 | return $macros if $macros; | |
16 | ||
17 | foreach my $path (</usr/share/shorewall/macro.*>) { | |
18 | if ($path =~ m|/macro\.(\S+)$|) { | |
19 | $macros->{$1} = 1; | |
20 | } | |
21 | } | |
22 | return $macros; | |
23 | } | |
24 | ||
dddd9413 | 25 | |
8cebfa6f | 26 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; |
dddd9413 DM |
27 | |
28 | my $generate_input_rule = sub { | |
29 | my ($zoneinfo, $rule, $net, $netid) = @_; | |
30 | ||
dddd9413 | 31 | my $zone = $net->{zone} || die "internal error"; |
a8195f4f | 32 | my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error"; |
dddd9413 | 33 | my $tap = $net->{tap} || die "internal error"; |
9aab3127 | 34 | |
8cebfa6f DM |
35 | my $dest = "$zid:$tap"; |
36 | ||
37 | if ($rule->{dest}) { | |
38 | $dest .= ":$rule->{dest}"; | |
39 | } | |
40 | ||
9aab3127 DM |
41 | my $action = $rule->{service} ? |
42 | "$rule->{service}($rule->{action})" : $rule->{action}; | |
43 | ||
8cebfa6f DM |
44 | my $source; |
45 | ||
46 | if ($zoneinfo->{$zone}->{type} eq 'bport') { | |
47 | my $bridge_zone = $zoneinfo->{$zone}->{bridge_zone} || die "internal error"; | |
48 | my $bridge_ext_zone = $zoneinfo->{$bridge_zone}->{bridge_ext_zone} || die "internal error"; | |
49 | my $zoneref = $zoneinfo->{$bridge_ext_zone}->{zoneref} || die "internal error"; | |
50 | if (!$rule->{source}) { | |
51 | $source = "${zoneref}"; | |
52 | } else { | |
53 | $source = "${zoneref}:$rule->{source}"; | |
54 | } | |
55 | } else { | |
9a4644fa | 56 | $source = "all:$rule->{source}"; |
8cebfa6f DM |
57 | } |
58 | ||
59 | return sprintf($rule_format, $action, $source, $dest, $rule->{proto} || '-', | |
60 | $rule->{dport} || '-', $rule->{sport} || '-'); | |
dddd9413 DM |
61 | }; |
62 | ||
63 | my $generate_output_rule = sub { | |
64 | my ($zoneinfo, $rule, $net, $netid) = @_; | |
65 | ||
dddd9413 | 66 | my $zone = $net->{zone} || die "internal error"; |
a8195f4f | 67 | my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error"; |
dddd9413 | 68 | my $tap = $net->{tap} || die "internal error"; |
9aab3127 DM |
69 | |
70 | my $action = $rule->{service} ? | |
71 | "$rule->{service}($rule->{action})" : $rule->{action}; | |
dddd9413 | 72 | |
8cebfa6f DM |
73 | my $dest; |
74 | ||
75 | if (!$rule->{dest}) { | |
9a4644fa | 76 | $dest = 'all'; |
8cebfa6f | 77 | } else { |
9a4644fa | 78 | $dest = "all:$rule->{dest}"; |
8cebfa6f DM |
79 | } |
80 | ||
81 | return sprintf($rule_format, $action, "$zid:$tap", $dest, | |
dddd9413 DM |
82 | $rule->{proto} || '-', $rule->{dport} || '-', $rule->{sport} || '-'); |
83 | }; | |
84 | ||
b6360c3f DM |
85 | # we need complete VM configuration of all VMs (openvz/qemu) |
86 | # in vmdata | |
87 | ||
5e1267a5 | 88 | my $compile_shorewall = sub { |
dddd9413 | 89 | my ($targetdir, $vmdata, $rules) = @_; |
b6360c3f | 90 | |
80bfe1ff | 91 | # remove existing data ? |
a8195f4f | 92 | foreach my $file (qw(params zones rules interfaces maclist policy)) { |
80bfe1ff DM |
93 | unlink "$targetdir/$file"; |
94 | } | |
95 | ||
b6360c3f DM |
96 | my $netinfo; |
97 | ||
886aba9c DM |
98 | my $zoneinfo = { |
99 | fw => { type => 'firewall' }, | |
100 | }; | |
101 | ||
026a6466 DM |
102 | my $maclist = {}; |
103 | ||
35081236 DM |
104 | my $register_bridge; |
105 | ||
106 | $register_bridge = sub { | |
107 | my ($bridge, $vlan) = @_; | |
f789653a DM |
108 | |
109 | my $zone = 'z' . $bridge; | |
110 | ||
111 | return $zone if $zoneinfo->{$zone}; | |
112 | ||
8cebfa6f DM |
113 | my $ext_zone = "z${bridge}ext"; |
114 | ||
f789653a DM |
115 | $zoneinfo->{$zone} = { |
116 | type => 'bridge', | |
117 | bridge => $bridge, | |
8cebfa6f DM |
118 | bridge_ext_zone => $ext_zone, |
119 | }; | |
120 | ||
121 | # physical input devices | |
122 | my $dir = "/sys/class/net/$bridge/brif"; | |
123 | my $physical = {}; | |
124 | PVE::Tools::dir_glob_foreach($dir, '((eth|bond).+)', sub { | |
125 | my ($slave) = @_; | |
126 | $physical->{$slave} = 1; | |
127 | }); | |
128 | ||
129 | $zoneinfo->{$ext_zone} = { | |
130 | type => 'bport', | |
131 | bridge_zone => $zone, | |
132 | ifaces => $physical, | |
f789653a | 133 | }; |
35081236 DM |
134 | |
135 | return &$register_bridge("${bridge}v${vlan}") if defined($vlan); | |
136 | ||
137 | return $zone; | |
138 | }; | |
139 | ||
140 | my $register_bridge_port = sub { | |
141 | my ($bridge, $vlan, $vmzone, $tap) = @_; | |
142 | ||
143 | my $bridge_zone = &$register_bridge($bridge, $vlan); | |
144 | my $zone = $bridge_zone . $vmzone; | |
145 | ||
146 | if (!$zoneinfo->{$zone}) { | |
147 | $zoneinfo->{$zone} = { | |
148 | type => 'bport', | |
149 | bridge_zone => $bridge_zone, | |
150 | ifaces => {}, | |
151 | }; | |
152 | } | |
153 | ||
154 | $zoneinfo->{$zone}->{ifaces}->{$tap} = 1; | |
f789653a DM |
155 | |
156 | return $zone; | |
157 | }; | |
158 | ||
b6360c3f DM |
159 | foreach my $vmid (keys %{$vmdata->{qemu}}) { |
160 | $netinfo->{$vmid} = {}; | |
161 | my $conf = $vmdata->{qemu}->{$vmid}; | |
162 | foreach my $opt (keys %$conf) { | |
163 | next if $opt !~ m/^net(\d+)$/; | |
dddd9413 | 164 | my $netnum = $1; |
b6360c3f DM |
165 | my $net = PVE::QemuServer::parse_net($conf->{$opt}); |
166 | next if !$net; | |
886aba9c | 167 | die "implement me" if !$net->{bridge}; |
886aba9c | 168 | |
f789653a | 169 | my $vmzone = $conf->{zone} || "vm$vmid"; |
dddd9413 | 170 | $net->{tap} = "tap${vmid}i${netnum}"; |
026a6466 | 171 | $maclist->{$net->{tap}} = $net->{macaddr} || die "internal error"; |
dddd9413 DM |
172 | $net->{zone} = &$register_bridge_port($net->{bridge}, $net->{tag}, $vmzone, $net->{tap}); |
173 | $netinfo->{$vmid}->{$opt} = $net; | |
886aba9c DM |
174 | } |
175 | } | |
176 | ||
177 | #print Dumper($netinfo); | |
178 | ||
f789653a | 179 | # NOTE: zone names have length limit, so we need to |
886aba9c DM |
180 | # translate them into shorter names |
181 | ||
f789653a DM |
182 | my $zoneid = 0; |
183 | my $zonemap = { fw => 'fw' }; | |
184 | ||
185 | my $lookup_zonename = sub { | |
186 | my ($zone) = @_; | |
187 | ||
188 | return $zonemap->{$zone} if defined($zonemap->{$zone}); | |
189 | $zonemap->{$zone} = 'z' . $zoneid++; | |
190 | ||
191 | return $zonemap->{$zone}; | |
192 | }; | |
193 | ||
dddd9413 DM |
194 | foreach my $z (sort keys %$zoneinfo) { |
195 | $zoneinfo->{$z}->{id} = &$lookup_zonename($z); | |
a8195f4f DM |
196 | $zoneinfo->{$z}->{zonevar} = uc($z); |
197 | $zoneinfo->{$z}->{zoneref} = '$' . $zoneinfo->{$z}->{zonevar}; | |
dddd9413 DM |
198 | } |
199 | ||
f789653a | 200 | my $out; |
886aba9c | 201 | |
a8195f4f DM |
202 | # dump params file |
203 | $out = "# PVE zones\n"; | |
204 | foreach my $z (sort keys %$zoneinfo) { | |
205 | $out .= "$zoneinfo->{$z}->{zonevar}=$zoneinfo->{$z}->{id}\n"; | |
206 | } | |
207 | PVE::Tools::file_set_contents("$targetdir/params", $out); | |
208 | ||
209 | # dump zone file | |
210 | ||
211 | my $format = "%-30s %-10s %-15s\n"; | |
212 | $out = sprintf($format, '#ZONE', 'TYPE', 'OPTIONS'); | |
f789653a | 213 | |
886aba9c | 214 | foreach my $z (sort keys %$zoneinfo) { |
a8195f4f | 215 | my $zid = $zoneinfo->{$z}->{zoneref}; |
f789653a | 216 | if ($zoneinfo->{$z}->{type} eq 'firewall') { |
a8195f4f | 217 | $out .= sprintf($format, $zid, $zoneinfo->{$z}->{type}, ''); |
f789653a | 218 | } elsif ($zoneinfo->{$z}->{type} eq 'bridge') { |
a8195f4f | 219 | $out .= sprintf($format, $zid, 'ipv4', ''); |
f789653a DM |
220 | } elsif ($zoneinfo->{$z}->{type} eq 'bport') { |
221 | my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error"; | |
a8195f4f DM |
222 | my $bzid = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error"; |
223 | $out .= sprintf($format, "$zid:$bzid", 'bport', ''); | |
f789653a DM |
224 | } else { |
225 | die "internal error"; | |
226 | } | |
886aba9c DM |
227 | } |
228 | ||
f789653a DM |
229 | $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n"); |
230 | ||
231 | PVE::Tools::file_set_contents("$targetdir/zones", $out); | |
886aba9c | 232 | |
f789653a | 233 | # dump interfaces |
886aba9c | 234 | |
a8195f4f DM |
235 | $format = "%-25s %-20s %-10s %-15s\n"; |
236 | $out = sprintf($format, '#ZONE', 'INTERFACE', 'BROADCAST', 'OPTIONS'); | |
f789653a | 237 | |
026a6466 DM |
238 | my $maclist_format = "%-15s %-15s %-15s\n"; |
239 | my $macs = sprintf($maclist_format, '#DISPOSITION', 'INTERFACE', 'MACZONE'); | |
240 | ||
886aba9c | 241 | foreach my $z (sort keys %$zoneinfo) { |
a8195f4f | 242 | my $zid = $zoneinfo->{$z}->{zoneref}; |
f789653a DM |
243 | if ($zoneinfo->{$z}->{type} eq 'firewall') { |
244 | # do nothing; | |
245 | } elsif ($zoneinfo->{$z}->{type} eq 'bridge') { | |
246 | my $bridge = $zoneinfo->{$z}->{bridge} || die "internal error"; | |
a8195f4f | 247 | $out .= sprintf($format, $zid, $bridge, 'detect', 'bridge,optional'); |
f789653a DM |
248 | } elsif ($zoneinfo->{$z}->{type} eq 'bport') { |
249 | my $ifaces = $zoneinfo->{$z}->{ifaces}; | |
250 | foreach my $iface (sort keys %$ifaces) { | |
251 | my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error"; | |
252 | my $bridge = $zoneinfo->{$bridge_zone}->{bridge} || die "internal error"; | |
253 | my $iftxt = "$bridge:$iface"; | |
8cebfa6f DM |
254 | |
255 | if ($maclist->{$iface}) { | |
256 | $out .= sprintf($format, $zid, $iftxt, '-', 'maclist'); | |
257 | $macs .= sprintf($maclist_format, 'ACCEPT', $iface, $maclist->{$iface}); | |
258 | } else { | |
259 | $out .= sprintf($format, $zid, $iftxt, '-', ''); | |
260 | } | |
f789653a DM |
261 | } |
262 | } else { | |
263 | die "internal error"; | |
b6360c3f DM |
264 | } |
265 | } | |
266 | ||
f789653a DM |
267 | $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n"); |
268 | ||
269 | PVE::Tools::file_set_contents("$targetdir/interfaces", $out); | |
270 | ||
026a6466 DM |
271 | # dump maclist |
272 | PVE::Tools::file_set_contents("$targetdir/maclist", $macs); | |
273 | ||
f789653a DM |
274 | # dump policy |
275 | ||
276 | $format = "%-15s %-15s %-15s %s\n"; | |
277 | $out = sprintf($format, '#SOURCE', 'DEST', 'POLICY', 'LOG'); | |
8cebfa6f DM |
278 | $out .= sprintf($format, 'fw', 'all', 'ACCEPT', ''); |
279 | ||
280 | # we need to disable intra-zone traffic on bridges. Else traffic | |
281 | # from untracked interfaces simply pass the firewall | |
282 | foreach my $z (sort keys %$zoneinfo) { | |
283 | my $zid = $zoneinfo->{$z}->{zoneref}; | |
284 | if ($zoneinfo->{$z}->{type} eq 'bridge') { | |
285 | $out .= sprintf($format, $zid, $zid, 'REJECT', 'info'); | |
286 | } | |
287 | } | |
f789653a | 288 | $out .= sprintf($format, 'all', 'all', 'REJECT', 'info'); |
886aba9c | 289 | |
f789653a | 290 | PVE::Tools::file_set_contents("$targetdir/policy", $out); |
886aba9c | 291 | |
dddd9413 DM |
292 | # dump rules |
293 | $out = ''; | |
294 | ||
295 | $out = sprintf($rule_format, '#ACTION', 'SOURCE', 'DEST', 'PROTO', 'DPORT', 'SPORT'); | |
296 | foreach my $vmid (sort keys %$rules) { | |
78db5872 DM |
297 | my $inrules = $rules->{$vmid}->{in}; |
298 | my $outrules = $rules->{$vmid}->{out}; | |
299 | ||
300 | if (scalar(@$inrules)) { | |
301 | $out .= "# IN to VM $vmid\n"; | |
dddd9413 DM |
302 | foreach my $rule (@$inrules) { |
303 | foreach my $netid (keys %{$netinfo->{$vmid}}) { | |
304 | my $net = $netinfo->{$vmid}->{$netid}; | |
9a4644fa | 305 | next if $rule->{iface} && $rule->{iface} ne $netid; |
dddd9413 DM |
306 | $out .= &$generate_input_rule($zoneinfo, $rule, $net, $netid); |
307 | } | |
308 | } | |
309 | } | |
310 | ||
78db5872 DM |
311 | if (scalar(@$outrules)) { |
312 | $out .= "# OUT from VM $vmid\n"; | |
dddd9413 DM |
313 | foreach my $rule (@$outrules) { |
314 | foreach my $netid (keys %{$netinfo->{$vmid}}) { | |
315 | my $net = $netinfo->{$vmid}->{$netid}; | |
9a4644fa | 316 | next if $rule->{iface} && $rule->{iface} ne $netid; |
dddd9413 DM |
317 | $out .= &$generate_output_rule($zoneinfo, $rule, $net, $netid); |
318 | } | |
319 | } | |
320 | } | |
321 | } | |
322 | ||
323 | PVE::Tools::file_set_contents("$targetdir/rules", $out); | |
5e1267a5 DM |
324 | }; |
325 | ||
326 | ||
327 | sub parse_fw_rules { | |
328 | my ($filename, $fh) = @_; | |
329 | ||
330 | my $section; | |
331 | ||
332 | my $res = { in => [], out => [] }; | |
333 | ||
334 | my $macros = PVE::Firewall::get_shorewall_macros(); | |
335 | ||
336 | while (defined(my $line = <$fh>)) { | |
337 | next if $line =~ m/^#/; | |
338 | next if $line =~ m/^\s*$/; | |
339 | ||
340 | if ($line =~ m/^\[(in|out)\]\s*$/i) { | |
341 | $section = lc($1); | |
342 | next; | |
343 | } | |
344 | next if !$section; | |
345 | ||
346 | my ($action, $iface, $source, $dest, $proto, $dport, $sport) = | |
347 | split(/\s+/, $line); | |
348 | ||
349 | if (!$action) { | |
350 | warn "skip incomplete line\n"; | |
351 | next; | |
352 | } | |
353 | ||
354 | my $service; | |
355 | if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) { | |
356 | # OK | |
357 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
358 | ($service, $action) = ($1, $2); | |
359 | if (!$macros->{$service}) { | |
360 | warn "unknown service '$service'\n"; | |
361 | next; | |
362 | } | |
363 | } else { | |
364 | warn "unknown action '$action'\n"; | |
365 | next; | |
366 | } | |
367 | ||
368 | $iface = undef if $iface && $iface eq '-'; | |
369 | if ($iface && $iface !~ m/^(net0|net1|net2|net3|net4|net5)$/) { | |
370 | warn "unknown interface '$iface'\n"; | |
371 | next; | |
372 | } | |
373 | ||
374 | $proto = undef if $proto && $proto eq '-'; | |
375 | if ($proto && $proto !~ m/^(icmp|tcp|udp)$/) { | |
376 | warn "unknown protokol '$proto'\n"; | |
377 | next; | |
378 | } | |
379 | ||
380 | $source = undef if $source && $source eq '-'; | |
381 | ||
382 | # if ($source !~ m/^(XYZ)$/) { | |
383 | # warn "unknown source '$source'\n"; | |
384 | # next; | |
385 | # } | |
386 | ||
387 | $dest = undef if $dest && $dest eq '-'; | |
388 | # if ($dest !~ m/^XYZ)$/) { | |
389 | # warn "unknown destination '$dest'\n"; | |
390 | # next; | |
391 | # } | |
392 | ||
393 | $dport = undef if $dport && $dport eq '-'; | |
394 | $sport = undef if $sport && $sport eq '-'; | |
395 | ||
396 | my $rule = { | |
397 | action => $action, | |
398 | service => $service, | |
399 | iface => $iface, | |
400 | source => $source, | |
401 | dest => $dest, | |
402 | proto => $proto, | |
403 | dport => $dport, | |
404 | sport => $sport, | |
405 | }; | |
406 | ||
407 | push @{$res->{$section}}, $rule; | |
408 | } | |
409 | ||
410 | return $res; | |
411 | } | |
412 | ||
413 | sub read_local_vm_config { | |
414 | ||
415 | my $openvz = {}; | |
416 | ||
417 | my $qemu = {}; | |
418 | ||
419 | my $list = PVE::QemuServer::config_list(); | |
420 | ||
421 | foreach my $vmid (keys %$list) { | |
422 | # next if $vmid ne '100'; | |
423 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); | |
424 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
425 | $qemu->{$vmid} = $conf; | |
426 | } | |
427 | } | |
428 | ||
429 | my $vmdata = { openvz => $openvz, qemu => $qemu }; | |
430 | ||
431 | return $vmdata; | |
432 | }; | |
433 | ||
434 | sub read_vm_firewall_rules { | |
435 | my ($vmdata) = @_; | |
436 | my $rules = {}; | |
437 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { | |
438 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
439 | my $fh = IO::File->new($filename, O_RDONLY); | |
440 | next if !$fh; | |
441 | ||
442 | $rules->{$vmid} = parse_fw_rules($filename, $fh); | |
443 | } | |
444 | ||
445 | return $rules; | |
446 | } | |
447 | ||
448 | sub compile { | |
449 | ||
450 | my $vmdata = read_local_vm_config(); | |
451 | my $rules = read_vm_firewall_rules($vmdata); | |
452 | ||
453 | # print Dumper($vmdata); | |
454 | ||
455 | my $swdir = '/etc/shorewall'; | |
456 | mkdir $swdir; | |
457 | ||
458 | &$compile_shorewall($swdir, $vmdata, $rules); | |
b6360c3f | 459 | |
5e1267a5 | 460 | PVE::Tools::run_command(['shorewall', 'compile']); |
b6360c3f DM |
461 | } |
462 | ||
5e1267a5 DM |
463 | sub compile_and_start { |
464 | my ($restart) = @_; | |
886aba9c | 465 | |
5e1267a5 | 466 | compile(); |
b6360c3f | 467 | |
5e1267a5 | 468 | PVE::Tools::run_command(['shorewall', $restart ? 'restart' : 'start']); |
b6360c3f DM |
469 | } |
470 | ||
471 | ||
472 | 1; |