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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 | ||
9 | my $macros; | |
10 | sub get_shorewall_macros { | |
11 | ||
12 | return $macros if $macros; | |
13 | ||
14 | foreach my $path (</usr/share/shorewall/macro.*>) { | |
15 | if ($path =~ m|/macro\.(\S+)$|) { | |
16 | $macros->{$1} = 1; | |
17 | } | |
18 | } | |
19 | return $macros; | |
20 | } | |
21 | ||
22 | ||
23 | my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n"; | |
24 | ||
25 | my $generate_input_rule = sub { | |
26 | my ($zoneinfo, $rule, $net, $netid) = @_; | |
27 | ||
28 | my $zone = $net->{zone} || die "internal error"; | |
29 | my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error"; | |
30 | my $tap = $net->{tap} || die "internal error"; | |
31 | ||
32 | my $dest = "$zid:$tap"; | |
33 | ||
34 | if ($rule->{dest}) { | |
35 | $dest .= ":$rule->{dest}"; | |
36 | } | |
37 | ||
38 | my $action = $rule->{service} ? | |
39 | "$rule->{service}($rule->{action})" : $rule->{action}; | |
40 | ||
41 | my $source; | |
42 | ||
43 | if ($zoneinfo->{$zone}->{type} eq 'bport') { | |
44 | my $bridge_zone = $zoneinfo->{$zone}->{bridge_zone} || die "internal error"; | |
45 | my $bridge_ext_zone = $zoneinfo->{$bridge_zone}->{bridge_ext_zone} || die "internal error"; | |
46 | my $zoneref = $zoneinfo->{$bridge_ext_zone}->{zoneref} || die "internal error"; | |
47 | if (!$rule->{source}) { | |
48 | $source = "${zoneref}"; | |
49 | } else { | |
50 | $source = "${zoneref}:$rule->{source}"; | |
51 | } | |
52 | } else { | |
53 | $source = "any:$rule->{source}"; | |
54 | } | |
55 | ||
56 | return sprintf($rule_format, $action, $source, $dest, $rule->{proto} || '-', | |
57 | $rule->{dport} || '-', $rule->{sport} || '-'); | |
58 | }; | |
59 | ||
60 | my $generate_output_rule = sub { | |
61 | my ($zoneinfo, $rule, $net, $netid) = @_; | |
62 | ||
63 | my $zone = $net->{zone} || die "internal error"; | |
64 | my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error"; | |
65 | my $tap = $net->{tap} || die "internal error"; | |
66 | ||
67 | my $action = $rule->{service} ? | |
68 | "$rule->{service}($rule->{action})" : $rule->{action}; | |
69 | ||
70 | my $dest; | |
71 | ||
72 | if (!$rule->{dest}) { | |
73 | $dest = 'any'; | |
74 | } else { | |
75 | $dest = "any:$rule->{dest}"; | |
76 | } | |
77 | ||
78 | return sprintf($rule_format, $action, "$zid:$tap", $dest, | |
79 | $rule->{proto} || '-', $rule->{dport} || '-', $rule->{sport} || '-'); | |
80 | }; | |
81 | ||
82 | # we need complete VM configuration of all VMs (openvz/qemu) | |
83 | # in vmdata | |
84 | ||
85 | sub compile { | |
86 | my ($targetdir, $vmdata, $rules) = @_; | |
87 | ||
88 | # remove existing data ? | |
89 | foreach my $file (qw(params zones rules interfaces maclist policy)) { | |
90 | unlink "$targetdir/$file"; | |
91 | } | |
92 | ||
93 | my $netinfo; | |
94 | ||
95 | my $zoneinfo = { | |
96 | fw => { type => 'firewall' }, | |
97 | }; | |
98 | ||
99 | my $maclist = {}; | |
100 | ||
101 | my $register_bridge; | |
102 | ||
103 | $register_bridge = sub { | |
104 | my ($bridge, $vlan) = @_; | |
105 | ||
106 | my $zone = 'z' . $bridge; | |
107 | ||
108 | return $zone if $zoneinfo->{$zone}; | |
109 | ||
110 | my $ext_zone = "z${bridge}ext"; | |
111 | ||
112 | $zoneinfo->{$zone} = { | |
113 | type => 'bridge', | |
114 | bridge => $bridge, | |
115 | bridge_ext_zone => $ext_zone, | |
116 | }; | |
117 | ||
118 | # physical input devices | |
119 | my $dir = "/sys/class/net/$bridge/brif"; | |
120 | my $physical = {}; | |
121 | PVE::Tools::dir_glob_foreach($dir, '((eth|bond).+)', sub { | |
122 | my ($slave) = @_; | |
123 | $physical->{$slave} = 1; | |
124 | }); | |
125 | ||
126 | $zoneinfo->{$ext_zone} = { | |
127 | type => 'bport', | |
128 | bridge_zone => $zone, | |
129 | ifaces => $physical, | |
130 | }; | |
131 | ||
132 | return &$register_bridge("${bridge}v${vlan}") if defined($vlan); | |
133 | ||
134 | return $zone; | |
135 | }; | |
136 | ||
137 | my $register_bridge_port = sub { | |
138 | my ($bridge, $vlan, $vmzone, $tap) = @_; | |
139 | ||
140 | my $bridge_zone = &$register_bridge($bridge, $vlan); | |
141 | my $zone = $bridge_zone . $vmzone; | |
142 | ||
143 | if (!$zoneinfo->{$zone}) { | |
144 | $zoneinfo->{$zone} = { | |
145 | type => 'bport', | |
146 | bridge_zone => $bridge_zone, | |
147 | ifaces => {}, | |
148 | }; | |
149 | } | |
150 | ||
151 | $zoneinfo->{$zone}->{ifaces}->{$tap} = 1; | |
152 | ||
153 | return $zone; | |
154 | }; | |
155 | ||
156 | foreach my $vmid (keys %{$vmdata->{qemu}}) { | |
157 | $netinfo->{$vmid} = {}; | |
158 | my $conf = $vmdata->{qemu}->{$vmid}; | |
159 | foreach my $opt (keys %$conf) { | |
160 | next if $opt !~ m/^net(\d+)$/; | |
161 | my $netnum = $1; | |
162 | my $net = PVE::QemuServer::parse_net($conf->{$opt}); | |
163 | next if !$net; | |
164 | die "implement me" if !$net->{bridge}; | |
165 | ||
166 | my $vmzone = $conf->{zone} || "vm$vmid"; | |
167 | $net->{tap} = "tap${vmid}i${netnum}"; | |
168 | $maclist->{$net->{tap}} = $net->{macaddr} || die "internal error"; | |
169 | $net->{zone} = &$register_bridge_port($net->{bridge}, $net->{tag}, $vmzone, $net->{tap}); | |
170 | $netinfo->{$vmid}->{$opt} = $net; | |
171 | } | |
172 | } | |
173 | ||
174 | #print Dumper($netinfo); | |
175 | ||
176 | # NOTE: zone names have length limit, so we need to | |
177 | # translate them into shorter names | |
178 | ||
179 | my $zoneid = 0; | |
180 | my $zonemap = { fw => 'fw' }; | |
181 | ||
182 | my $lookup_zonename = sub { | |
183 | my ($zone) = @_; | |
184 | ||
185 | return $zonemap->{$zone} if defined($zonemap->{$zone}); | |
186 | $zonemap->{$zone} = 'z' . $zoneid++; | |
187 | ||
188 | return $zonemap->{$zone}; | |
189 | }; | |
190 | ||
191 | foreach my $z (sort keys %$zoneinfo) { | |
192 | $zoneinfo->{$z}->{id} = &$lookup_zonename($z); | |
193 | $zoneinfo->{$z}->{zonevar} = uc($z); | |
194 | $zoneinfo->{$z}->{zoneref} = '$' . $zoneinfo->{$z}->{zonevar}; | |
195 | } | |
196 | ||
197 | my $out; | |
198 | ||
199 | # dump params file | |
200 | $out = "# PVE zones\n"; | |
201 | foreach my $z (sort keys %$zoneinfo) { | |
202 | $out .= "$zoneinfo->{$z}->{zonevar}=$zoneinfo->{$z}->{id}\n"; | |
203 | } | |
204 | PVE::Tools::file_set_contents("$targetdir/params", $out); | |
205 | ||
206 | # dump zone file | |
207 | ||
208 | my $format = "%-30s %-10s %-15s\n"; | |
209 | $out = sprintf($format, '#ZONE', 'TYPE', 'OPTIONS'); | |
210 | ||
211 | foreach my $z (sort keys %$zoneinfo) { | |
212 | my $zid = $zoneinfo->{$z}->{zoneref}; | |
213 | if ($zoneinfo->{$z}->{type} eq 'firewall') { | |
214 | $out .= sprintf($format, $zid, $zoneinfo->{$z}->{type}, ''); | |
215 | } elsif ($zoneinfo->{$z}->{type} eq 'bridge') { | |
216 | $out .= sprintf($format, $zid, 'ipv4', ''); | |
217 | } elsif ($zoneinfo->{$z}->{type} eq 'bport') { | |
218 | my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error"; | |
219 | my $bzid = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error"; | |
220 | $out .= sprintf($format, "$zid:$bzid", 'bport', ''); | |
221 | } else { | |
222 | die "internal error"; | |
223 | } | |
224 | } | |
225 | ||
226 | $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n"); | |
227 | ||
228 | PVE::Tools::file_set_contents("$targetdir/zones", $out); | |
229 | ||
230 | # dump interfaces | |
231 | ||
232 | $format = "%-25s %-20s %-10s %-15s\n"; | |
233 | $out = sprintf($format, '#ZONE', 'INTERFACE', 'BROADCAST', 'OPTIONS'); | |
234 | ||
235 | my $maclist_format = "%-15s %-15s %-15s\n"; | |
236 | my $macs = sprintf($maclist_format, '#DISPOSITION', 'INTERFACE', 'MACZONE'); | |
237 | ||
238 | foreach my $z (sort keys %$zoneinfo) { | |
239 | my $zid = $zoneinfo->{$z}->{zoneref}; | |
240 | if ($zoneinfo->{$z}->{type} eq 'firewall') { | |
241 | # do nothing; | |
242 | } elsif ($zoneinfo->{$z}->{type} eq 'bridge') { | |
243 | my $bridge = $zoneinfo->{$z}->{bridge} || die "internal error"; | |
244 | $out .= sprintf($format, $zid, $bridge, 'detect', 'bridge,optional'); | |
245 | } elsif ($zoneinfo->{$z}->{type} eq 'bport') { | |
246 | my $ifaces = $zoneinfo->{$z}->{ifaces}; | |
247 | foreach my $iface (sort keys %$ifaces) { | |
248 | my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error"; | |
249 | my $bridge = $zoneinfo->{$bridge_zone}->{bridge} || die "internal error"; | |
250 | my $iftxt = "$bridge:$iface"; | |
251 | ||
252 | if ($maclist->{$iface}) { | |
253 | $out .= sprintf($format, $zid, $iftxt, '-', 'maclist'); | |
254 | $macs .= sprintf($maclist_format, 'ACCEPT', $iface, $maclist->{$iface}); | |
255 | } else { | |
256 | $out .= sprintf($format, $zid, $iftxt, '-', ''); | |
257 | } | |
258 | } | |
259 | } else { | |
260 | die "internal error"; | |
261 | } | |
262 | } | |
263 | ||
264 | $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n"); | |
265 | ||
266 | PVE::Tools::file_set_contents("$targetdir/interfaces", $out); | |
267 | ||
268 | # dump maclist | |
269 | PVE::Tools::file_set_contents("$targetdir/maclist", $macs); | |
270 | ||
271 | # dump policy | |
272 | ||
273 | $format = "%-15s %-15s %-15s %s\n"; | |
274 | $out = sprintf($format, '#SOURCE', 'DEST', 'POLICY', 'LOG'); | |
275 | $out .= sprintf($format, 'fw', 'all', 'ACCEPT', ''); | |
276 | ||
277 | # we need to disable intra-zone traffic on bridges. Else traffic | |
278 | # from untracked interfaces simply pass the firewall | |
279 | foreach my $z (sort keys %$zoneinfo) { | |
280 | my $zid = $zoneinfo->{$z}->{zoneref}; | |
281 | if ($zoneinfo->{$z}->{type} eq 'bridge') { | |
282 | $out .= sprintf($format, $zid, $zid, 'REJECT', 'info'); | |
283 | } | |
284 | } | |
285 | $out .= sprintf($format, 'all', 'all', 'REJECT', 'info'); | |
286 | ||
287 | PVE::Tools::file_set_contents("$targetdir/policy", $out); | |
288 | ||
289 | # dump rules | |
290 | $out = ''; | |
291 | ||
292 | $out = sprintf($rule_format, '#ACTION', 'SOURCE', 'DEST', 'PROTO', 'DPORT', 'SPORT'); | |
293 | foreach my $vmid (sort keys %$rules) { | |
294 | my $inrules = $rules->{$vmid}->{in}; | |
295 | my $outrules = $rules->{$vmid}->{out}; | |
296 | ||
297 | if (scalar(@$inrules)) { | |
298 | $out .= "# IN to VM $vmid\n"; | |
299 | foreach my $rule (@$inrules) { | |
300 | foreach my $netid (keys %{$netinfo->{$vmid}}) { | |
301 | my $net = $netinfo->{$vmid}->{$netid}; | |
302 | next if !($rule->{iface} eq 'any' || $rule->{iface} eq $netid); | |
303 | $out .= &$generate_input_rule($zoneinfo, $rule, $net, $netid); | |
304 | } | |
305 | } | |
306 | } | |
307 | ||
308 | if (scalar(@$outrules)) { | |
309 | $out .= "# OUT from VM $vmid\n"; | |
310 | foreach my $rule (@$outrules) { | |
311 | foreach my $netid (keys %{$netinfo->{$vmid}}) { | |
312 | my $net = $netinfo->{$vmid}->{$netid}; | |
313 | next if !($rule->{iface} eq 'any' || $rule->{iface} eq $netid); | |
314 | $out .= &$generate_output_rule($zoneinfo, $rule, $net, $netid); | |
315 | } | |
316 | } | |
317 | } | |
318 | } | |
319 | ||
320 | PVE::Tools::file_set_contents("$targetdir/rules", $out); | |
321 | ||
322 | } | |
323 | ||
324 | ||
325 | sub activate { | |
326 | ||
327 | } | |
328 | ||
329 | ||
330 | 1; |