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1 | package PVE::Firewall; | |
2 | ||
3 | use warnings; | |
4 | use strict; | |
5 | use Data::Dumper; | |
6 | use PVE::Tools; | |
7 | use PVE::QemuServer; | |
8 | use File::Path; | |
9 | use IO::File; | |
10 | use Data::Dumper; | |
11 | ||
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 | ||
25 | ||
26 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; | |
27 | ||
28 | my $generate_input_rule = sub { | |
29 | my ($zoneinfo, $rule, $net, $netid) = @_; | |
30 | ||
31 | my $zone = $net->{zone} || die "internal error"; | |
32 | my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error"; | |
33 | my $tap = $net->{tap} || die "internal error"; | |
34 | ||
35 | my $dest = "$zid:$tap"; | |
36 | ||
37 | if ($rule->{dest}) { | |
38 | $dest .= ":$rule->{dest}"; | |
39 | } | |
40 | ||
41 | my $action = $rule->{service} ? | |
42 | "$rule->{service}($rule->{action})" : $rule->{action}; | |
43 | ||
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 | $source = 'all'; | |
53 | } else { | |
54 | # 'all' does not work | |
55 | $source = "${zoneref}:$rule->{source}"; | |
56 | } | |
57 | } else { | |
58 | $source = "all:$rule->{source}"; | |
59 | } | |
60 | ||
61 | return sprintf($rule_format, $action, $source, $dest, $rule->{proto} || '-', | |
62 | $rule->{dport} || '-', $rule->{sport} || '-'); | |
63 | }; | |
64 | ||
65 | my $generate_output_rule = sub { | |
66 | my ($zoneinfo, $rule, $net, $netid) = @_; | |
67 | ||
68 | my $zone = $net->{zone} || die "internal error"; | |
69 | my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error"; | |
70 | my $tap = $net->{tap} || die "internal error"; | |
71 | ||
72 | my $action = $rule->{service} ? | |
73 | "$rule->{service}($rule->{action})" : $rule->{action}; | |
74 | ||
75 | my $dest; | |
76 | ||
77 | if (!$rule->{dest}) { | |
78 | $dest = 'all'; | |
79 | } else { | |
80 | $dest = "all:$rule->{dest}"; | |
81 | } | |
82 | ||
83 | return sprintf($rule_format, $action, "$zid:$tap", $dest, | |
84 | $rule->{proto} || '-', $rule->{dport} || '-', $rule->{sport} || '-'); | |
85 | }; | |
86 | ||
87 | # we need complete VM configuration of all VMs (openvz/qemu) | |
88 | # in vmdata | |
89 | ||
90 | my $compile_shorewall = sub { | |
91 | my ($targetdir, $vmdata, $rules) = @_; | |
92 | ||
93 | # remove existing data ? | |
94 | foreach my $file (qw(params zones rules interfaces maclist policy)) { | |
95 | unlink "$targetdir/$file"; | |
96 | } | |
97 | ||
98 | my $netinfo; | |
99 | ||
100 | my $zoneinfo = { | |
101 | fw => { type => 'firewall' }, | |
102 | }; | |
103 | ||
104 | my $maclist = {}; | |
105 | ||
106 | my $register_bridge; | |
107 | ||
108 | $register_bridge = sub { | |
109 | my ($bridge, $vlan) = @_; | |
110 | ||
111 | my $zone = 'z' . $bridge; | |
112 | ||
113 | return $zone if $zoneinfo->{$zone}; | |
114 | ||
115 | my $ext_zone = "z${bridge}ext"; | |
116 | ||
117 | $zoneinfo->{$zone} = { | |
118 | type => 'bridge', | |
119 | bridge => $bridge, | |
120 | bridge_ext_zone => $ext_zone, | |
121 | }; | |
122 | ||
123 | # physical input devices | |
124 | my $dir = "/sys/class/net/$bridge/brif"; | |
125 | my $physical = {}; | |
126 | PVE::Tools::dir_glob_foreach($dir, '((eth|bond).+)', sub { | |
127 | my ($slave) = @_; | |
128 | $physical->{$slave} = 1; | |
129 | }); | |
130 | ||
131 | $zoneinfo->{$ext_zone} = { | |
132 | type => 'bport', | |
133 | bridge_zone => $zone, | |
134 | ifaces => $physical, | |
135 | }; | |
136 | ||
137 | return &$register_bridge("${bridge}v${vlan}") if defined($vlan); | |
138 | ||
139 | return $zone; | |
140 | }; | |
141 | ||
142 | my $register_bridge_port = sub { | |
143 | my ($bridge, $vlan, $vmzone, $tap) = @_; | |
144 | ||
145 | my $bridge_zone = &$register_bridge($bridge, $vlan); | |
146 | my $zone = $bridge_zone . $vmzone; | |
147 | ||
148 | if (!$zoneinfo->{$zone}) { | |
149 | $zoneinfo->{$zone} = { | |
150 | type => 'bport', | |
151 | bridge_zone => $bridge_zone, | |
152 | ifaces => {}, | |
153 | }; | |
154 | } | |
155 | ||
156 | $zoneinfo->{$zone}->{ifaces}->{$tap} = 1; | |
157 | ||
158 | return $zone; | |
159 | }; | |
160 | ||
161 | foreach my $vmid (keys %{$vmdata->{qemu}}) { | |
162 | $netinfo->{$vmid} = {}; | |
163 | my $conf = $vmdata->{qemu}->{$vmid}; | |
164 | foreach my $opt (keys %$conf) { | |
165 | next if $opt !~ m/^net(\d+)$/; | |
166 | my $netnum = $1; | |
167 | my $net = PVE::QemuServer::parse_net($conf->{$opt}); | |
168 | next if !$net; | |
169 | die "implement me" if !$net->{bridge}; | |
170 | ||
171 | my $vmzone = $conf->{zone} || "vm$vmid"; | |
172 | $net->{tap} = "tap${vmid}i${netnum}"; | |
173 | $maclist->{$net->{tap}} = $net->{macaddr} || die "internal error"; | |
174 | $net->{zone} = &$register_bridge_port($net->{bridge}, $net->{tag}, $vmzone, $net->{tap}); | |
175 | $netinfo->{$vmid}->{$opt} = $net; | |
176 | } | |
177 | } | |
178 | ||
179 | #print Dumper($netinfo); | |
180 | ||
181 | # NOTE: zone names have length limit, so we need to | |
182 | # translate them into shorter names | |
183 | ||
184 | my $zoneid = 0; | |
185 | my $zonemap = { fw => 'fw' }; | |
186 | ||
187 | my $lookup_zonename = sub { | |
188 | my ($zone) = @_; | |
189 | ||
190 | return $zonemap->{$zone} if defined($zonemap->{$zone}); | |
191 | $zonemap->{$zone} = 'z' . $zoneid++; | |
192 | ||
193 | return $zonemap->{$zone}; | |
194 | }; | |
195 | ||
196 | foreach my $z (sort keys %$zoneinfo) { | |
197 | $zoneinfo->{$z}->{id} = &$lookup_zonename($z); | |
198 | $zoneinfo->{$z}->{zonevar} = uc($z); | |
199 | $zoneinfo->{$z}->{zoneref} = '$' . $zoneinfo->{$z}->{zonevar}; | |
200 | } | |
201 | ||
202 | my $out; | |
203 | ||
204 | # dump params file | |
205 | $out = "# PVE zones\n"; | |
206 | foreach my $z (sort keys %$zoneinfo) { | |
207 | $out .= "$zoneinfo->{$z}->{zonevar}=$zoneinfo->{$z}->{id}\n"; | |
208 | } | |
209 | PVE::Tools::file_set_contents("$targetdir/params", $out); | |
210 | ||
211 | # dump zone file | |
212 | ||
213 | my $format = "%-30s %-10s %-15s\n"; | |
214 | $out = sprintf($format, '#ZONE', 'TYPE', 'OPTIONS'); | |
215 | ||
216 | foreach my $z (sort keys %$zoneinfo) { | |
217 | my $zid = $zoneinfo->{$z}->{zoneref}; | |
218 | if ($zoneinfo->{$z}->{type} eq 'firewall') { | |
219 | $out .= sprintf($format, $zid, $zoneinfo->{$z}->{type}, ''); | |
220 | } elsif ($zoneinfo->{$z}->{type} eq 'bridge') { | |
221 | $out .= sprintf($format, $zid, 'ipv4', ''); | |
222 | } elsif ($zoneinfo->{$z}->{type} eq 'bport') { | |
223 | my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error"; | |
224 | my $bzid = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error"; | |
225 | $out .= sprintf($format, "$zid:$bzid", 'bport', ''); | |
226 | } else { | |
227 | die "internal error"; | |
228 | } | |
229 | } | |
230 | ||
231 | $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n"); | |
232 | ||
233 | PVE::Tools::file_set_contents("$targetdir/zones", $out); | |
234 | ||
235 | # dump interfaces | |
236 | ||
237 | $format = "%-25s %-20s %-10s %-15s\n"; | |
238 | $out = sprintf($format, '#ZONE', 'INTERFACE', 'BROADCAST', 'OPTIONS'); | |
239 | ||
240 | my $maclist_format = "%-15s %-15s %-15s\n"; | |
241 | my $macs = sprintf($maclist_format, '#DISPOSITION', 'INTERFACE', 'MACZONE'); | |
242 | ||
243 | foreach my $z (sort keys %$zoneinfo) { | |
244 | my $zid = $zoneinfo->{$z}->{zoneref}; | |
245 | if ($zoneinfo->{$z}->{type} eq 'firewall') { | |
246 | # do nothing; | |
247 | } elsif ($zoneinfo->{$z}->{type} eq 'bridge') { | |
248 | my $bridge = $zoneinfo->{$z}->{bridge} || die "internal error"; | |
249 | $out .= sprintf($format, $zid, $bridge, 'detect', 'bridge,optional'); | |
250 | } elsif ($zoneinfo->{$z}->{type} eq 'bport') { | |
251 | my $ifaces = $zoneinfo->{$z}->{ifaces}; | |
252 | foreach my $iface (sort keys %$ifaces) { | |
253 | my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error"; | |
254 | my $bridge = $zoneinfo->{$bridge_zone}->{bridge} || die "internal error"; | |
255 | my $iftxt = "$bridge:$iface"; | |
256 | ||
257 | if ($maclist->{$iface}) { | |
258 | $out .= sprintf($format, $zid, $iftxt, '-', 'maclist'); | |
259 | $macs .= sprintf($maclist_format, 'ACCEPT', $iface, $maclist->{$iface}); | |
260 | } else { | |
261 | $out .= sprintf($format, $zid, $iftxt, '-', ''); | |
262 | } | |
263 | } | |
264 | } else { | |
265 | die "internal error"; | |
266 | } | |
267 | } | |
268 | ||
269 | $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n"); | |
270 | ||
271 | PVE::Tools::file_set_contents("$targetdir/interfaces", $out); | |
272 | ||
273 | # dump maclist | |
274 | PVE::Tools::file_set_contents("$targetdir/maclist", $macs); | |
275 | ||
276 | # dump policy | |
277 | ||
278 | $format = "%-15s %-15s %-15s %s\n"; | |
279 | $out = sprintf($format, '#SOURCE', 'DEST', 'POLICY', 'LOG'); | |
280 | $out .= sprintf($format, 'fw', 'all', 'ACCEPT', ''); | |
281 | ||
282 | # we need to disable intra-zone traffic on bridges. Else traffic | |
283 | # from untracked interfaces simply pass the firewall | |
284 | foreach my $z (sort keys %$zoneinfo) { | |
285 | my $zid = $zoneinfo->{$z}->{zoneref}; | |
286 | if ($zoneinfo->{$z}->{type} eq 'bridge') { | |
287 | $out .= sprintf($format, $zid, $zid, 'REJECT', 'info'); | |
288 | } | |
289 | } | |
290 | $out .= sprintf($format, 'all', 'all', 'REJECT', 'info'); | |
291 | ||
292 | PVE::Tools::file_set_contents("$targetdir/policy", $out); | |
293 | ||
294 | # dump rules | |
295 | $out = ''; | |
296 | ||
297 | $out = sprintf($rule_format, '#ACTION', 'SOURCE', 'DEST', 'PROTO', 'DPORT', 'SPORT'); | |
298 | foreach my $vmid (sort keys %$rules) { | |
299 | my $inrules = $rules->{$vmid}->{in}; | |
300 | my $outrules = $rules->{$vmid}->{out}; | |
301 | ||
302 | if (scalar(@$inrules)) { | |
303 | $out .= "# IN to VM $vmid\n"; | |
304 | foreach my $rule (@$inrules) { | |
305 | foreach my $netid (keys %{$netinfo->{$vmid}}) { | |
306 | my $net = $netinfo->{$vmid}->{$netid}; | |
307 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
308 | $out .= &$generate_input_rule($zoneinfo, $rule, $net, $netid); | |
309 | } | |
310 | } | |
311 | } | |
312 | ||
313 | if (scalar(@$outrules)) { | |
314 | $out .= "# OUT from VM $vmid\n"; | |
315 | foreach my $rule (@$outrules) { | |
316 | foreach my $netid (keys %{$netinfo->{$vmid}}) { | |
317 | my $net = $netinfo->{$vmid}->{$netid}; | |
318 | next if $rule->{iface} && $rule->{iface} ne $netid; | |
319 | $out .= &$generate_output_rule($zoneinfo, $rule, $net, $netid); | |
320 | } | |
321 | } | |
322 | } | |
323 | } | |
324 | ||
325 | PVE::Tools::file_set_contents("$targetdir/rules", $out); | |
326 | }; | |
327 | ||
328 | ||
329 | sub parse_fw_rules { | |
330 | my ($filename, $fh) = @_; | |
331 | ||
332 | my $section; | |
333 | ||
334 | my $res = { in => [], out => [] }; | |
335 | ||
336 | my $macros = PVE::Firewall::get_shorewall_macros(); | |
337 | ||
338 | while (defined(my $line = <$fh>)) { | |
339 | next if $line =~ m/^#/; | |
340 | next if $line =~ m/^\s*$/; | |
341 | ||
342 | if ($line =~ m/^\[(in|out)\]\s*$/i) { | |
343 | $section = lc($1); | |
344 | next; | |
345 | } | |
346 | next if !$section; | |
347 | ||
348 | my ($action, $iface, $source, $dest, $proto, $dport, $sport) = | |
349 | split(/\s+/, $line); | |
350 | ||
351 | if (!$action) { | |
352 | warn "skip incomplete line\n"; | |
353 | next; | |
354 | } | |
355 | ||
356 | my $service; | |
357 | if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) { | |
358 | # OK | |
359 | } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) { | |
360 | ($service, $action) = ($1, $2); | |
361 | if (!$macros->{$service}) { | |
362 | warn "unknown service '$service'\n"; | |
363 | next; | |
364 | } | |
365 | } else { | |
366 | warn "unknown action '$action'\n"; | |
367 | next; | |
368 | } | |
369 | ||
370 | $iface = undef if $iface && $iface eq '-'; | |
371 | if ($iface && $iface !~ m/^(net0|net1|net2|net3|net4|net5)$/) { | |
372 | warn "unknown interface '$iface'\n"; | |
373 | next; | |
374 | } | |
375 | ||
376 | $proto = undef if $proto && $proto eq '-'; | |
377 | if ($proto && $proto !~ m/^(icmp|tcp|udp)$/) { | |
378 | warn "unknown protokol '$proto'\n"; | |
379 | next; | |
380 | } | |
381 | ||
382 | $source = undef if $source && $source eq '-'; | |
383 | ||
384 | # if ($source !~ m/^(XYZ)$/) { | |
385 | # warn "unknown source '$source'\n"; | |
386 | # next; | |
387 | # } | |
388 | ||
389 | $dest = undef if $dest && $dest eq '-'; | |
390 | # if ($dest !~ m/^XYZ)$/) { | |
391 | # warn "unknown destination '$dest'\n"; | |
392 | # next; | |
393 | # } | |
394 | ||
395 | $dport = undef if $dport && $dport eq '-'; | |
396 | $sport = undef if $sport && $sport eq '-'; | |
397 | ||
398 | my $rule = { | |
399 | action => $action, | |
400 | service => $service, | |
401 | iface => $iface, | |
402 | source => $source, | |
403 | dest => $dest, | |
404 | proto => $proto, | |
405 | dport => $dport, | |
406 | sport => $sport, | |
407 | }; | |
408 | ||
409 | push @{$res->{$section}}, $rule; | |
410 | } | |
411 | ||
412 | return $res; | |
413 | } | |
414 | ||
415 | sub read_local_vm_config { | |
416 | ||
417 | my $openvz = {}; | |
418 | ||
419 | my $qemu = {}; | |
420 | ||
421 | my $list = PVE::QemuServer::config_list(); | |
422 | ||
423 | foreach my $vmid (keys %$list) { | |
424 | # next if $vmid ne '100'; | |
425 | my $cfspath = PVE::QemuServer::cfs_config_path($vmid); | |
426 | if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) { | |
427 | $qemu->{$vmid} = $conf; | |
428 | } | |
429 | } | |
430 | ||
431 | my $vmdata = { openvz => $openvz, qemu => $qemu }; | |
432 | ||
433 | return $vmdata; | |
434 | }; | |
435 | ||
436 | sub read_vm_firewall_rules { | |
437 | my ($vmdata) = @_; | |
438 | my $rules = {}; | |
439 | foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) { | |
440 | my $filename = "/etc/pve/firewall/$vmid.fw"; | |
441 | my $fh = IO::File->new($filename, O_RDONLY); | |
442 | next if !$fh; | |
443 | ||
444 | $rules->{$vmid} = parse_fw_rules($filename, $fh); | |
445 | } | |
446 | ||
447 | return $rules; | |
448 | } | |
449 | ||
450 | sub compile { | |
451 | ||
452 | my $vmdata = read_local_vm_config(); | |
453 | my $rules = read_vm_firewall_rules($vmdata); | |
454 | ||
455 | # print Dumper($vmdata); | |
456 | ||
457 | my $swdir = '/etc/shorewall'; | |
458 | mkdir $swdir; | |
459 | ||
460 | &$compile_shorewall($swdir, $vmdata, $rules); | |
461 | ||
462 | PVE::Tools::run_command(['shorewall', 'compile']); | |
463 | } | |
464 | ||
465 | sub compile_and_start { | |
466 | my ($restart) = @_; | |
467 | ||
468 | compile(); | |
469 | ||
470 | PVE::Tools::run_command(['shorewall', $restart ? 'restart' : 'start']); | |
471 | } | |
472 | ||
473 | ||
474 | 1; |