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1 | #!/usr/bin/perl | |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | use PVE::SafeSyslog; | |
6 | use PVE::Daemon; | |
7 | ||
8 | use Time::HiRes qw (gettimeofday); | |
9 | use PVE::Tools qw(dir_glob_foreach file_read_firstline); | |
10 | use PVE::ProcFSTools; | |
11 | use PVE::INotify; | |
12 | use PVE::Cluster qw(cfs_read_file); | |
13 | use PVE::RPCEnvironment; | |
14 | use PVE::CLIHandler; | |
15 | use PVE::Firewall; | |
16 | use PVE::FirewallSimulator; | |
17 | use Data::Dumper; | |
18 | ||
19 | use base qw(PVE::Daemon); | |
20 | ||
21 | $SIG{'__WARN__'} = sub { | |
22 | my $err = $@; | |
23 | my $t = $_[0]; | |
24 | chomp $t; | |
25 | print STDERR "$t\n"; | |
26 | syslog('warning', "%s", $t); | |
27 | $@ = $err; | |
28 | }; | |
29 | ||
30 | my $cmdline = [$0, @ARGV]; | |
31 | ||
32 | my %daemon_options = (restart_on_error => 5, stop_wait_time => 5); | |
33 | ||
34 | my $daemon = __PACKAGE__->new('pve-firewall', $cmdline, %daemon_options); | |
35 | ||
36 | my $rpcenv = PVE::RPCEnvironment->init('cli'); | |
37 | ||
38 | $rpcenv->init_request(); | |
39 | $rpcenv->set_language($ENV{LANG}); | |
40 | $rpcenv->set_user('root@pam'); | |
41 | ||
42 | my $nodename = PVE::INotify::nodename(); | |
43 | ||
44 | sub init { | |
45 | ||
46 | PVE::Cluster::cfs_update(); | |
47 | ||
48 | PVE::Firewall::init(); | |
49 | } | |
50 | ||
51 | my $restart_request = 0; | |
52 | my $next_update = 0; | |
53 | ||
54 | my $cycle = 0; | |
55 | my $updatetime = 10; | |
56 | ||
57 | my $initial_memory_usage; | |
58 | ||
59 | sub shutdown { | |
60 | my ($self) = @_; | |
61 | ||
62 | syslog('info' , "server closing"); | |
63 | ||
64 | # wait for children | |
65 | 1 while (waitpid(-1, POSIX::WNOHANG()) > 0); | |
66 | ||
67 | syslog('info' , "clear firewall rules"); | |
68 | ||
69 | eval { PVE::Firewall::remove_pvefw_chains(); }; | |
70 | warn $@ if $@; | |
71 | ||
72 | $self->exit_daemon(0); | |
73 | } | |
74 | ||
75 | sub hup { | |
76 | my ($self) = @_; | |
77 | ||
78 | $restart_request = 1; | |
79 | } | |
80 | ||
81 | sub run { | |
82 | my ($self) = @_; | |
83 | ||
84 | local $SIG{'__WARN__'} = 'IGNORE'; # do not fill up logs | |
85 | ||
86 | for (;;) { # forever | |
87 | ||
88 | $next_update = time() + $updatetime; | |
89 | ||
90 | my ($ccsec, $cusec) = gettimeofday (); | |
91 | eval { | |
92 | PVE::Cluster::cfs_update(); | |
93 | PVE::Firewall::update(); | |
94 | }; | |
95 | my $err = $@; | |
96 | ||
97 | if ($err) { | |
98 | syslog('err', "status update error: $err"); | |
99 | } | |
100 | ||
101 | my ($ccsec_end, $cusec_end) = gettimeofday (); | |
102 | my $cptime = ($ccsec_end-$ccsec) + ($cusec_end - $cusec)/1000000; | |
103 | ||
104 | syslog('info', sprintf("firewall update time (%.3f seconds)", $cptime)) | |
105 | if ($cptime > 5); | |
106 | ||
107 | $cycle++; | |
108 | ||
109 | my $mem = PVE::ProcFSTools::read_memory_usage(); | |
110 | ||
111 | if (!defined($initial_memory_usage) || ($cycle < 10)) { | |
112 | $initial_memory_usage = $mem->{resident}; | |
113 | } else { | |
114 | my $diff = $mem->{resident} - $initial_memory_usage; | |
115 | if ($diff > 5*1024*1024) { | |
116 | syslog ('info', "restarting server after $cycle cycles to " . | |
117 | "reduce memory usage (free $mem->{resident} ($diff) bytes)"); | |
118 | $self->restart_daemon(); | |
119 | } | |
120 | } | |
121 | ||
122 | my $wcount = 0; | |
123 | while ((time() < $next_update) && | |
124 | ($wcount < $updatetime) && # protect against time wrap | |
125 | !$restart_request) { $wcount++; sleep (1); }; | |
126 | ||
127 | $self->restart_daemon() if $restart_request; | |
128 | } | |
129 | } | |
130 | ||
131 | $daemon->register_start_command("Start the Proxmox VE firewall service."); | |
132 | $daemon->register_restart_command(1, "Restart the Proxmox VE firewall service."); | |
133 | $daemon->register_stop_command("Stop firewall. This removes all Proxmox VE " . | |
134 | "related iptable rules. " . | |
135 | "The host is unprotected afterwards."); | |
136 | ||
137 | __PACKAGE__->register_method ({ | |
138 | name => 'status', | |
139 | path => 'status', | |
140 | method => 'GET', | |
141 | description => "Get firewall status.", | |
142 | parameters => { | |
143 | additionalProperties => 0, | |
144 | properties => {}, | |
145 | }, | |
146 | returns => { | |
147 | type => 'object', | |
148 | additionalProperties => 0, | |
149 | properties => { | |
150 | status => { | |
151 | type => 'string', | |
152 | enum => ['unknown', 'stopped', 'running'], | |
153 | }, | |
154 | enable => { | |
155 | description => "Firewall is enabled (in 'cluster.fw')", | |
156 | type => 'boolean', | |
157 | }, | |
158 | changes => { | |
159 | description => "Set when there are pending changes.", | |
160 | type => 'boolean', | |
161 | optional => 1, | |
162 | } | |
163 | }, | |
164 | }, | |
165 | code => sub { | |
166 | my ($param) = @_; | |
167 | ||
168 | local $SIG{'__WARN__'} = 'DEFAULT'; # do not fill up syslog | |
169 | ||
170 | my $code = sub { | |
171 | ||
172 | my $status = $daemon->running() ? 'running' : 'stopped'; | |
173 | ||
174 | my $res = { status => $status }; | |
175 | ||
176 | my $verbose = 1; # show syntax errors | |
177 | my $cluster_conf = PVE::Firewall::load_clusterfw_conf(undef, $verbose); | |
178 | $res->{enable} = $cluster_conf->{options}->{enable} ? 1 : 0; | |
179 | ||
180 | if ($status eq 'running') { | |
181 | ||
182 | my ($ruleset, $ipset_ruleset, $rulesetv6) = PVE::Firewall::compile($cluster_conf, undef, undef, $verbose); | |
183 | ||
184 | $verbose = 0; # do not show iptables details | |
185 | my (undef, undef, $ipset_changes) = PVE::Firewall::get_ipset_cmdlist($ipset_ruleset, $verbose); | |
186 | my ($test, $ruleset_changes) = PVE::Firewall::get_ruleset_cmdlist($ruleset, $verbose); | |
187 | my (undef, $ruleset_changesv6) = PVE::Firewall::get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables"); | |
188 | ||
189 | $res->{changes} = ($ipset_changes || $ruleset_changes || $ruleset_changesv6) ? 1 : 0; | |
190 | } | |
191 | ||
192 | return $res; | |
193 | }; | |
194 | ||
195 | return PVE::Firewall::run_locked($code); | |
196 | }}); | |
197 | ||
198 | __PACKAGE__->register_method ({ | |
199 | name => 'compile', | |
200 | path => 'compile', | |
201 | method => 'GET', | |
202 | description => "Compile and print firewall rules. This is useful for testing.", | |
203 | parameters => { | |
204 | additionalProperties => 0, | |
205 | properties => {}, | |
206 | }, | |
207 | returns => { type => 'null' }, | |
208 | ||
209 | code => sub { | |
210 | my ($param) = @_; | |
211 | ||
212 | local $SIG{'__WARN__'} = 'DEFAULT'; # do not fill up syslog | |
213 | ||
214 | my $code = sub { | |
215 | ||
216 | my $verbose = 1; | |
217 | ||
218 | my $cluster_conf = PVE::Firewall::load_clusterfw_conf(undef, $verbose); | |
219 | my ($ruleset, $ipset_ruleset, $rulesetv6) = PVE::Firewall::compile($cluster_conf, undef, undef, $verbose); | |
220 | ||
221 | print "ipset cmdlist:\n"; | |
222 | my (undef, undef, $ipset_changes) = PVE::Firewall::get_ipset_cmdlist($ipset_ruleset, $verbose); | |
223 | ||
224 | print "\niptables cmdlist:\n"; | |
225 | my (undef, $ruleset_changes) = PVE::Firewall::get_ruleset_cmdlist($ruleset, $verbose); | |
226 | ||
227 | print "\nip6tables cmdlist:\n"; | |
228 | my (undef, $ruleset_changesv6) = PVE::Firewall::get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables"); | |
229 | ||
230 | if ($ipset_changes || $ruleset_changes || $ruleset_changesv6) { | |
231 | print "detected changes\n"; | |
232 | } else { | |
233 | print "no changes\n"; | |
234 | } | |
235 | if (!$cluster_conf->{options}->{enable}) { | |
236 | print "firewall disabled\n"; | |
237 | } | |
238 | ||
239 | }; | |
240 | ||
241 | PVE::Firewall::run_locked($code); | |
242 | ||
243 | return undef; | |
244 | }}); | |
245 | ||
246 | __PACKAGE__->register_method ({ | |
247 | name => 'localnet', | |
248 | path => 'localnet', | |
249 | method => 'GET', | |
250 | description => "Print information about local network.", | |
251 | parameters => { | |
252 | additionalProperties => 0, | |
253 | properties => {}, | |
254 | }, | |
255 | returns => { type => 'null' }, | |
256 | code => sub { | |
257 | my ($param) = @_; | |
258 | ||
259 | local $SIG{'__WARN__'} = 'DEFAULT'; # do not fill up syslog | |
260 | ||
261 | my $nodename = PVE::INotify::nodename(); | |
262 | print "local hostname: $nodename\n"; | |
263 | ||
264 | my $ip = PVE::Cluster::remote_node_ip($nodename); | |
265 | print "local IP address: $ip\n"; | |
266 | ||
267 | my $cluster_conf = PVE::Firewall::load_clusterfw_conf(); | |
268 | ||
269 | my $localnet = PVE::Firewall::local_network() || '127.0.0.0/8'; | |
270 | print "network auto detect: $localnet\n"; | |
271 | if ($cluster_conf->{aliases}->{local_network}) { | |
272 | print "using user defined local_network: $cluster_conf->{aliases}->{local_network}->{cidr}\n"; | |
273 | } else { | |
274 | print "using detected local_network: $localnet\n"; | |
275 | } | |
276 | ||
277 | return undef; | |
278 | }}); | |
279 | ||
280 | __PACKAGE__->register_method ({ | |
281 | name => 'simulate', | |
282 | path => 'simulate', | |
283 | method => 'GET', | |
284 | description => "Simulate firewall rules. This does not simulate kernel 'routing' table. Instead, this simply assumes that routing from source zone to destination zone is possible.", | |
285 | parameters => { | |
286 | additionalProperties => 0, | |
287 | properties => { | |
288 | verbose => { | |
289 | description => "Verbose output.", | |
290 | type => 'boolean', | |
291 | optional => 1, | |
292 | default => 0, | |
293 | }, | |
294 | from => { | |
295 | description => "Source zone.", | |
296 | type => 'string', | |
297 | pattern => '(host|outside|vm\d+|ct\d+|vmbr\d+/\S+)', | |
298 | optional => 1, | |
299 | default => 'outside', | |
300 | }, | |
301 | to => { | |
302 | description => "Destination zone.", | |
303 | type => 'string', | |
304 | pattern => '(host|outside|vm\d+|ct\d+|vmbr\d+/\S+)', | |
305 | optional => 1, | |
306 | default => 'host', | |
307 | }, | |
308 | protocol => { | |
309 | description => "Protocol.", | |
310 | type => 'string', | |
311 | pattern => '(tcp|udp)', | |
312 | optional => 1, | |
313 | default => 'tcp', | |
314 | }, | |
315 | dport => { | |
316 | description => "Destination port.", | |
317 | type => 'integer', | |
318 | minValue => 1, | |
319 | maxValue => 65535, | |
320 | optional => 1, | |
321 | }, | |
322 | sport => { | |
323 | description => "Source port.", | |
324 | type => 'integer', | |
325 | minValue => 1, | |
326 | maxValue => 65535, | |
327 | optional => 1, | |
328 | }, | |
329 | source => { | |
330 | description => "Source IP address.", | |
331 | type => 'string', format => 'ipv4', | |
332 | optional => 1, | |
333 | }, | |
334 | dest => { | |
335 | description => "Destination IP address.", | |
336 | type => 'string', format => 'ipv4', | |
337 | optional => 1, | |
338 | }, | |
339 | }, | |
340 | }, | |
341 | returns => { type => 'null' }, | |
342 | code => sub { | |
343 | my ($param) = @_; | |
344 | ||
345 | local $SIG{'__WARN__'} = 'DEFAULT'; # do not fill up syslog | |
346 | ||
347 | my ($ruleset, $ipset_ruleset, $rulesetv6) = PVE::Firewall::compile(undef, undef, undef, $param->{verbose}); | |
348 | ||
349 | PVE::FirewallSimulator::debug($param->{verbose} || 0); | |
350 | ||
351 | my $host_ip = PVE::Cluster::remote_node_ip($nodename); | |
352 | ||
353 | PVE::FirewallSimulator::reset_trace(); | |
354 | print Dumper($ruleset) if $param->{verbose}; | |
355 | ||
356 | my $test = { | |
357 | from => $param->{from}, | |
358 | to => $param->{to}, | |
359 | proto => $param->{protocol} || 'tcp', | |
360 | source => $param->{source}, | |
361 | dest => $param->{dest}, | |
362 | dport => $param->{dport}, | |
363 | sport => $param->{sport}, | |
364 | }; | |
365 | ||
366 | if (!defined($test->{to})) { | |
367 | $test->{to} = 'host'; | |
368 | PVE::FirewallSimulator::add_trace("Set Zone: to => '$test->{to}'\n"); | |
369 | } | |
370 | if (!defined($test->{from})) { | |
371 | $test->{from} = 'outside', | |
372 | PVE::FirewallSimulator::add_trace("Set Zone: from => '$test->{from}'\n"); | |
373 | } | |
374 | ||
375 | my $vmdata = PVE::Firewall::read_local_vm_config(); | |
376 | ||
377 | print "Test packet:\n"; | |
378 | ||
379 | foreach my $k (qw(from to proto source dest dport sport)) { | |
380 | printf(" %-8s: %s\n", $k, $test->{$k}) if defined($test->{$k}); | |
381 | } | |
382 | ||
383 | $test->{action} = 'QUERY'; | |
384 | ||
385 | my $res = PVE::FirewallSimulator::simulate_firewall($ruleset, $ipset_ruleset, | |
386 | $host_ip, $vmdata, $test); | |
387 | ||
388 | print "ACTION: $res\n"; | |
389 | ||
390 | return undef; | |
391 | }}); | |
392 | ||
393 | my $cmddef = { | |
394 | start => [ __PACKAGE__, 'start', []], | |
395 | restart => [ __PACKAGE__, 'restart', []], | |
396 | stop => [ __PACKAGE__, 'stop', []], | |
397 | compile => [ __PACKAGE__, 'compile', []], | |
398 | simulate => [ __PACKAGE__, 'simulate', []], | |
399 | localnet => [ __PACKAGE__, 'localnet', []], | |
400 | status => [ __PACKAGE__, 'status', [], undef, sub { | |
401 | my $res = shift; | |
402 | my $status = ($res->{enable} ? "enabled" : "disabled") . '/' . $res->{status}; | |
403 | ||
404 | if ($res->{changes}) { | |
405 | print "Status: $status (pending changes)\n"; | |
406 | } else { | |
407 | print "Status: $status\n"; | |
408 | } | |
409 | }], | |
410 | }; | |
411 | ||
412 | my $cmd = shift; | |
413 | ||
414 | PVE::CLIHandler::handle_cmd($cmddef, $0, $cmd, \@ARGV, undef, $0); | |
415 | ||
416 | exit (0); | |
417 | ||
418 | __END__ | |
419 | ||
420 | =head1 NAME | |
421 | ||
422 | pve-firewall - PVE Firewall Daemon | |
423 | ||
424 | =head1 SYNOPSIS | |
425 | ||
426 | =include synopsis | |
427 | ||
428 | =head1 DESCRIPTION | |
429 | ||
430 | This service updates iptables rules periodically. | |
431 | ||
432 | =include pve_copyright |