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Commit | Line | Data |
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48b79db9 MR |
1 | package PVE::DHCPServer; |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | use Carp qw(croak); | |
6 | use Sys::Hostname; | |
7 | use Socket; | |
8 | use Socket6; | |
4a195854 | 9 | use NetAddr::IP; |
48b79db9 MR |
10 | use IO::Socket::IP; |
11 | use IO::File; | |
12 | use IO::Select; | |
13 | use Sys::Syslog; | |
14 | use Fcntl qw(:DEFAULT :flock SEEK_END); | |
15 | use POSIX qw(EINTR setsid strftime); | |
16 | use Data::Dumper; | |
17 | use Time::Local; | |
18 | ||
4a195854 MR |
19 | use Net::DHCP::Packet; |
20 | use Net::DHCP::Constants; | |
21 | ||
48b79db9 | 22 | use constant { |
245c6d23 MR |
23 | DEBUG => 0, |
24 | INFO => 1, | |
25 | NOTICE => 2, | |
26 | WARNING => 3, | |
27 | ERROR => 4, | |
28 | CRITICAL => 5, | |
29 | ALERT => 6, | |
30 | EMERGENCY => 7, | |
31 | DHCP_OFFER => 100, | |
32 | DHCP_ACK => 101, | |
48b79db9 MR |
33 | }; |
34 | ||
35 | use Exporter; | |
36 | our @ISA = qw(Exporter); | |
4a195854 MR |
37 | our @EXPORT = qw( |
38 | run | |
39 | DEBUG | |
40 | INFO | |
41 | NOTICE | |
42 | WARNING | |
43 | ERROR | |
44 | CRITICAL | |
45 | ALERT | |
46 | EMERGENCY | |
48b79db9 MR |
47 | ); |
48 | ||
48b79db9 MR |
49 | our $VERSION = '0.01'; |
50 | our $NAME = 'PVE::DHCPServer'; | |
4a195854 MR |
51 | our $DEFAULT_LEASE = 7200; |
52 | our $DEFAULT_LEASE_RENEW = 5400; | |
48b79db9 MR |
53 | my $time_to_die = 0; |
54 | ||
4a195854 MR |
55 | ######################################################################### |
56 | # Private methods | |
57 | ######################################################################### | |
48b79db9 | 58 | |
4a195854 MR |
59 | my $logger = sub { |
60 | my ($self, $message, $level) = @_; | |
48b79db9 | 61 | |
4a195854 MR |
62 | $level ||= DEBUG; |
63 | return unless ($level >= $self->{LOG_LEVEL}); | |
48b79db9 | 64 | |
4a195854 MR |
65 | $level = "debug" if $level eq DEBUG; |
66 | $level = "info" if $level eq INFO; | |
67 | $level = "notice" if $level eq NOTICE; | |
68 | $level = "warning" if $level eq WARNING; | |
69 | $level = "err" if $level eq ERROR; | |
70 | $level = "crit" if $level eq CRITICAL; | |
71 | $level = "alert" if $level eq ALERT; | |
72 | $level = "emerg" if $level eq EMERGENCY; | |
48b79db9 | 73 | |
4a195854 MR |
74 | if ($self->{DEBUG}) { |
75 | print STDOUT strftime "[%d/%b/%Y:%H:%M:%S] ", localtime; | |
76 | print STDOUT "$level: " . ($message ? $message : 'No message') . "\n"; | |
77 | } elsif ($self->{log_file} eq 'syslog') { | |
78 | openlog($NAME, 'ndelay,pid', 'user'); | |
79 | syslog($level, $message); | |
80 | closelog(); | |
81 | } else { | |
82 | my $fh = new IO::File; | |
83 | if (! $fh->open("> $self->{log_file}")) { | |
84 | croak "$self->{log_file}: $!"; | |
48b79db9 | 85 | } |
4a195854 MR |
86 | print $fh strftime "[%d/%b/%Y:%H:%M:%S] ", localtime; |
87 | print $fh "$level: $message\n"; | |
88 | undef $fh; | |
48b79db9 | 89 | } |
4a195854 | 90 | }; |
48b79db9 | 91 | |
4a195854 | 92 | my $run_with_timeout = sub { |
48b79db9 MR |
93 | my ($self, $code, @param) = @_; |
94 | ||
95 | die "got timeout" if $self->{timeout} <= 0; | |
96 | ||
97 | my $prev_alarm; | |
98 | ||
99 | my $sigcount = 0; | |
100 | ||
101 | my $res; | |
102 | ||
103 | local $SIG{ALRM} = sub { $sigcount++; }; # catch alarm outside eval | |
104 | ||
105 | eval { | |
106 | local $SIG{ALRM} = sub { $sigcount++; die "got timeout"; }; | |
107 | local $SIG{PIPE} = sub { $sigcount++; die "broken pipe" }; | |
108 | local $SIG{__DIE__}; # see SA bug 4631 | |
109 | ||
110 | $prev_alarm = alarm($self->{timeout}); | |
111 | ||
112 | $res = &$code(@param); | |
113 | ||
114 | alarm(0); # avoid race conditions | |
115 | }; | |
116 | ||
117 | my $err = $@; | |
118 | ||
119 | alarm($prev_alarm) if defined($prev_alarm); | |
120 | ||
121 | die "unknown error" if $sigcount && !$err; # seems to happen sometimes | |
122 | ||
123 | die $err if $err; | |
124 | ||
125 | return $res; | |
4a195854 | 126 | }; |
48b79db9 | 127 | |
4a195854 | 128 | my $lock = sub { |
cb0a294f | 129 | my ($self, $file, $shared) = @_; |
48b79db9 MR |
130 | |
131 | my $mode = $shared ? LOCK_SH : LOCK_EX; | |
132 | ||
133 | my $lock_func = sub { | |
134 | if ($mode == LOCK_SH) { | |
cb0a294f MR |
135 | $self->{file_handle} = new IO::File ("<$file") || |
136 | die "can't open file '$file' for read - $!"; | |
48b79db9 | 137 | } else { |
cb0a294f MR |
138 | $self->{file_handle} = new IO::File (">$file") || |
139 | die "can't open file '$file' for write - $!"; | |
48b79db9 | 140 | } |
4a195854 | 141 | $self->$logger("trying to aquire lock on '$file'..."); |
48b79db9 MR |
142 | if (!flock ($self->{file_handle}, $mode|LOCK_NB)) { |
143 | my $success; | |
144 | while(1) { | |
145 | $success = flock($self->{file_handle}, $mode); | |
146 | # try again on EINTR (see bug #273) | |
147 | if ($success || ($! != EINTR)) { | |
148 | last; | |
149 | } | |
150 | } | |
151 | if ($mode == LOCK_SH) { | |
152 | seek($self->{file_handle}, 0, SEEK_END) or $success = 0; | |
153 | } | |
154 | if (!$success) { | |
4a195854 | 155 | $self->$logger(" failed"); |
48b79db9 MR |
156 | die "can't aquire lock - $!"; |
157 | } | |
158 | } | |
4a195854 | 159 | $self->$logger(" OK"); |
48b79db9 MR |
160 | }; |
161 | ||
162 | my $res; | |
163 | my $err = undef; | |
164 | ||
165 | eval { | |
4a195854 | 166 | $res = $self->$run_with_timeout($lock_func); |
48b79db9 MR |
167 | }; |
168 | if ($@) { | |
4a195854 | 169 | $self->$logger("can't lock file '$file' - $@", ERROR); |
48b79db9 MR |
170 | $self->{file_handle} = undef; |
171 | return undef; | |
172 | } | |
173 | ||
174 | return $res; | |
4a195854 | 175 | }; |
48b79db9 | 176 | |
4a195854 | 177 | my $unlock = sub { |
cb0a294f | 178 | my ($self, $file) = @_; |
48b79db9 MR |
179 | |
180 | return '' unless($self->{file_handle}); | |
181 | my $unlock_func = sub { | |
4a195854 | 182 | $self->$logger("trying to unlock '$file'..."); |
48b79db9 MR |
183 | if (!flock($self->{file_handle}, LOCK_UN)) { |
184 | ||
185 | my $success; | |
186 | while(1) { | |
187 | $success = flock($self->{file_handle}, LOCK_UN); | |
188 | # try again on EINTR (see bug #273) | |
189 | if ($success || ($! != EINTR)) { | |
190 | last; | |
191 | } | |
192 | } | |
193 | if (!$success) { | |
4a195854 | 194 | $self->$logger(" failed"); |
48b79db9 MR |
195 | die "can't unlock - $!"; |
196 | } | |
197 | } | |
4a195854 | 198 | $self->$logger(" OK"); |
48b79db9 MR |
199 | }; |
200 | ||
201 | my $res; | |
202 | my $err = undef; | |
203 | ||
204 | eval { | |
4a195854 | 205 | $res = $self->$run_with_timeout($unlock_func); |
48b79db9 MR |
206 | }; |
207 | if ($@) { | |
4a195854 | 208 | $self->$logger("can't lock file '$file' - $@", ERROR); |
48b79db9 MR |
209 | $self->{file_handle} = undef; |
210 | $res = undef; | |
211 | } | |
212 | ||
213 | return $res; | |
4a195854 | 214 | }; |
48b79db9 | 215 | |
4a195854 | 216 | my $convert_timestamp = sub { |
48b79db9 MR |
217 | my ($self, $timestamp, $strtotime) = @_; |
218 | my ($res, $mday, $mon, $year, $hour, $min, $sec); | |
219 | ||
4a195854 | 220 | $self->$logger("Timestamp: $timestamp"); |
48b79db9 MR |
221 | if ($strtotime) { |
222 | if ($timestamp !~ /^\d{4}\/\d{2}\/\d{2}\s+\d{2}:\d{2}:\d{2}$/) { | |
4a195854 | 223 | $self->$logger("$timestamp: (strtotime) Bad format", ERROR); |
48b79db9 MR |
224 | $res = undef; |
225 | } else { | |
226 | ($year,$mon,$mday,$hour,$min,$sec) = split(/[\s\/:]+/, $timestamp); | |
227 | $res = timelocal($sec,$min,$hour,$mday,$mon-1,$year); | |
228 | } | |
229 | } else{ | |
4a195854 | 230 | $self->$logger($timestamp); |
48b79db9 | 231 | if ($timestamp !~ /^\d+$/) { |
4a195854 | 232 | $self->$logger("$timestamp: (timetostr) Bad format", ERROR); |
48b79db9 MR |
233 | $res = undef; |
234 | } else { | |
235 | ($sec,$min,$hour,$mday,$mon,$year) = localtime($timestamp); | |
4a195854 | 236 | $self->$logger("Timestamp: $sec,$min,$hour,$mday,$mon,$year"); |
48b79db9 | 237 | $res = sprintf("%d/%02d/%02d %02d:%02d:%02d", ($year+1900),($mon+1),$mday,$hour,$min,$sec); |
4a195854 | 238 | $self->$logger("Timestamp: $res"); |
48b79db9 MR |
239 | } |
240 | } | |
241 | ||
242 | return $res; | |
4a195854 | 243 | }; |
48b79db9 MR |
244 | |
245 | ||
4a195854 | 246 | my $add_lease = sub { |
48b79db9 MR |
247 | my ($self, $ip, $lease) = @_; |
248 | my $ts; | |
249 | ||
250 | my $mac = $lease->{'hardware ethernet'}; | |
251 | $mac =~ tr/://d; | |
252 | $lease->{'hardware ethernet'} = $mac; | |
4a195854 | 253 | $ts = $self->$convert_timestamp($lease->{starts}, 1); |
48b79db9 MR |
254 | return unless $ts; |
255 | $lease->{starts} = $ts; | |
4a195854 | 256 | $ts = $self->$convert_timestamp($lease->{ends}, 1); |
48b79db9 MR |
257 | return unless $ts; |
258 | $lease->{ends} = $ts; | |
259 | ||
260 | $self->{_leases}->{$ip} = $lease; | |
4a195854 | 261 | $self->$logger(Dumper($self->{_leases}->{$ip})); |
48b79db9 | 262 | $self->{_reverse}->{$mac} = $ip; |
4a195854 MR |
263 | $self->$logger("$mac => $self->{_reverse}->{$mac}"); |
264 | }; | |
48b79db9 MR |
265 | |
266 | #lease vvv.xxx.yyy.zzz { | |
267 | # starts yyyy/mm/dd hh:mm:ss; | |
268 | # ends yyyy/mm/dd hh:mm:ss; | |
269 | # binding state active|free; | |
270 | # hardware ethernet MAC; | |
271 | # client-hostname "name" | |
272 | #} | |
4a195854 | 273 | my $read_lease_file = sub { |
48b79db9 MR |
274 | my ($self) = @_; |
275 | my ($res, $key, $lease); | |
276 | my $error = 0; | |
277 | ||
4a195854 MR |
278 | # Start with empty leases file? |
279 | if (! -e $self->{lease_file}) { | |
280 | return 0; | |
281 | } | |
282 | ||
283 | $self->$lock($self->{lease_file}, 1); | |
48b79db9 MR |
284 | if ($self->{file_handle}) { |
285 | my $fh = $self->{file_handle}; | |
286 | my @lines = <$fh>; | |
287 | foreach (@lines) { | |
4a195854 | 288 | $self->$logger("Read: $_"); |
48b79db9 | 289 | if ($_ =~ /^\s*lease\s+([\d\.]+)\s+{\s*/) { |
4a195854 | 290 | $self->$add_lease($key, $lease) if $lease; |
48b79db9 MR |
291 | $key = $1; |
292 | $lease = undef; | |
293 | $error = 0; | |
4a195854 | 294 | $self->$logger("Key: $key"); |
48b79db9 MR |
295 | } else { |
296 | next if $error; | |
a23b2728 | 297 | next if ($_ =~ /^\s*}\s*/ || $_ =~ /^\s*$/ || $_ =~ /^\s*#.*/); |
48b79db9 MR |
298 | if ($_ =~ /^\s*(starts|ends|binding state|hardware ethernet|client-hostname)\s+(.+)\s*;/) { |
299 | $lease->{$1} = $2; | |
4a195854 | 300 | $self->$logger("Key: $1 Value: $2"); |
48b79db9 MR |
301 | } else { |
302 | $key = 'UNDEF' unless $key; | |
4a195854 | 303 | $self->$logger("$key: Bad format", ERROR); |
48b79db9 MR |
304 | $key = undef; |
305 | $lease = undef; | |
306 | $error = 1; | |
307 | } | |
308 | } | |
309 | } | |
310 | if ($lease && !$error) { | |
4a195854 MR |
311 | $self->$logger("Key: $key"); |
312 | $self->$add_lease($key, $lease); | |
48b79db9 | 313 | } |
4a195854 MR |
314 | $self->$logger("Leases data structure: \n" . Dumper($self->{_leases})); |
315 | $self->$unlock($self->{lease_file}); | |
48b79db9 MR |
316 | $res = 1; |
317 | } else { | |
245c6d23 | 318 | $self->$logger("Could not read leases file", INFO); |
48b79db9 MR |
319 | $res = 0; |
320 | } | |
321 | ||
322 | return $res; | |
4a195854 | 323 | }; |
48b79db9 | 324 | |
4a195854 | 325 | my $write_lease_file = sub { |
48b79db9 MR |
326 | my ($self) = @_; |
327 | my $res; | |
328 | ||
4a195854 | 329 | $res = $self->$lock($self->{lease_file}, 0); |
48b79db9 | 330 | if ($self->{file_handle}) { |
4a195854 MR |
331 | if ($self->{_leases}) { |
332 | my $fh = $self->{file_handle}; | |
245c6d23 MR |
333 | my $leases = $self->{_leases}; |
334 | while ((my $lease, my $elems) = each (%$leases)) { | |
4a195854 MR |
335 | $self->$logger("Writing: $lease"); |
336 | print $fh "lease $lease {\n"; | |
337 | while ((my $key, my $val) = each %$elems) { | |
338 | if ($key =~ /^(starts|ends)$/) { | |
339 | $val = $self->$convert_timestamp($val, 0); | |
340 | } | |
341 | $self->$logger("Writing: $key $val"); | |
342 | print $fh "\t$key $val;\n"; | |
48b79db9 | 343 | } |
4a195854 | 344 | print $fh "}\n"; |
48b79db9 | 345 | } |
48b79db9 | 346 | } |
4a195854 | 347 | $self->$unlock($self->{lease_file}); |
48b79db9 MR |
348 | $res = 1; |
349 | } else { | |
245c6d23 | 350 | $self->$logger("$self->{lease_file}: Could not write leases file", ERROR); |
48b79db9 MR |
351 | $res = 0; |
352 | } | |
353 | ||
354 | return $res; | |
4a195854 | 355 | }; |
48b79db9 | 356 | |
cb0a294f MR |
357 | #subnet 192.168.9.0 netmask 255.255.255.0 { |
358 | # range 192.168.9.2 192.168.9.100; | |
359 | # ttl 7200; | |
360 | # rttl 3600; | |
361 | # router 192.168.9.254; | |
362 | # dns-servers 192.168.2.201; | |
363 | # ntp-servers 192.168.9.254; | |
364 | # broadcast 192.168.9.255; | |
365 | # domain-name "foo.bar"; | |
366 | # { | |
367 | # allow 001cc0c33317,001cc0c33318,001cc0c33319,001cc0c33320; | |
368 | # static 001cc0c33317 192.168.9.100,001cc0c33318 192.168.9.200; | |
369 | # } | |
370 | #} | |
4a195854 | 371 | my $read_config = sub { |
cb0a294f MR |
372 | my ($self) = @_; |
373 | my ($res, $key, $netmask, $config, $subopt); | |
374 | ||
4a195854 | 375 | $self->$lock($self->{conf_file}, 1); |
cb0a294f MR |
376 | if ($self->{file_handle}) { |
377 | my $fh = $self->{file_handle}; | |
378 | my @lines = <$fh>; | |
379 | $subopt = 0; | |
380 | foreach (@lines) { | |
4a195854 | 381 | $self->$logger("Read: $_"); |
cb0a294f MR |
382 | if ($_ =~ /^\s*subnet\s+([\d\.]+)\s+netmask\s+([\d\.]+)\s+{\s*/) { |
383 | $self->{_config}->{$key} = $config if $config; | |
384 | $key = $1; | |
385 | $config = undef; | |
386 | $config->{netmask} = $2; | |
4a195854 | 387 | $self->$logger("Key: $key Netmask: $config->{netmask}"); |
cb0a294f MR |
388 | } else { |
389 | next if (($_ =~ /^\s*}\s*/ && ! $subopt) || $_ =~ /^\s*$/ || $_ =~ /^\s*#.*/); | |
390 | if (! $subopt && $_ =~ /^\s*(range|ttl|rttl|router|dns-servers|ntp-servers|broadcast|domain-name)\s+(.+)\s*;/) { | |
391 | $config->{$1} = $2; | |
4a195854 | 392 | $self->$logger("Key: $1 Value: $2"); |
cb0a294f MR |
393 | } elsif ($subopt &&$_ =~ /^\s*}\s*/) { |
394 | $subopt = 0; | |
395 | } elsif ($subopt || $_ =~ /^\s*{\s*/) { | |
396 | if ($subopt) { | |
397 | if ($_ =~ /^\s*(allow|static)\s+(.+)\s*;/) { | |
2470397f | 398 | my @vals = split(/\s*,\s*/, $2); |
cb0a294f | 399 | $config->{$1} = [@vals]; |
4a195854 | 400 | $self->$logger("Key: $1 Value: $2"); |
cb0a294f MR |
401 | } else { |
402 | $key = 'UNDEF' unless $key; | |
403 | my $err = "$key: 'suboptions' Bad format"; | |
4a195854 | 404 | $self->$logger($err, ERROR); |
cb0a294f MR |
405 | $key = undef; |
406 | $config = undef; | |
407 | die $err; | |
408 | } | |
409 | } else { | |
410 | $subopt = 1; | |
411 | } | |
412 | } else { | |
413 | $key = 'UNDEF' unless $key; | |
414 | my $err = "$key: Bad format"; | |
4a195854 | 415 | $self->$logger($err, ERROR); |
cb0a294f MR |
416 | $key = undef; |
417 | $config = undef; | |
418 | die $err; | |
419 | } | |
420 | } | |
421 | } | |
422 | if ($config) { | |
423 | $self->{_config}->{$key} = $config; | |
424 | } | |
4a195854 MR |
425 | $self->$logger("Config data structure: \n" . Dumper($self->{_config})); |
426 | $self->$unlock($self->{conf_file}); | |
cb0a294f MR |
427 | if (!$self->{_config}) { |
428 | die "Empty config file"; | |
429 | } | |
430 | } else { | |
431 | die "Could not read config file"; | |
432 | } | |
4a195854 | 433 | }; |
cb0a294f | 434 | |
dc6fa7b0 MR |
435 | my $cleanup_leases = sub { |
436 | my ($self, $last_run) = @_; | |
437 | my ($current, $last, $lease, $dirty); | |
438 | ||
439 | $self->{INTERVAL} = 5 if $self->{INTERVAL} <= 0; | |
440 | $current = time; | |
441 | $last = $last_run + ($self->{INTERVAL} * 60); | |
442 | ||
443 | $self->$logger("Run 'cleanup_leases' $last < $current", INFO); | |
444 | ||
445 | if ($last < $current) { | |
446 | $last_run = $current; | |
447 | my $leases = $self->{_leases}; | |
448 | $dirty = 0; | |
449 | while ((my $lease, my $elems) = each (%$leases)) { | |
450 | $self->$logger("Clean up lease: $lease\n". Dumper($elems)); | |
451 | if ($elems->{ends} < $last_run) { | |
452 | $self->$logger("Considering $lease for clean up: $elems->{ends} < $last_run\n". Dumper($elems)); | |
453 | if ($elems->{'binding state'} eq 'active') { | |
454 | $self->$logger("Setting $lease 'binding state' to free", INFO); | |
455 | $elems->{'binding state'} = 'free'; | |
456 | $dirty = 1; | |
457 | } | |
458 | } | |
459 | } | |
460 | if ($dirty) { | |
461 | my $res = $self->$write_lease_file(); | |
462 | if ($res) { | |
463 | $self->$logger("Updated lease file", INFO); | |
464 | } | |
465 | } | |
466 | } | |
467 | ||
468 | return $last_run; | |
469 | }; | |
470 | ||
4a195854 MR |
471 | ######################################################################### |
472 | # Private methods which handle DHCP4 requests | |
473 | ######################################################################### | |
48b79db9 | 474 | |
4a195854 | 475 | my $get_mac_ip4 = sub { |
245c6d23 | 476 | my ($self, $req) = @_; |
4a195854 | 477 | my $mac; |
48b79db9 | 478 | |
245c6d23 | 479 | $mac = $req->chaddr(); |
4a195854 | 480 | $mac =~ s/0+$//; |
48b79db9 | 481 | |
4a195854 MR |
482 | return $mac; |
483 | }; | |
484 | ||
485 | my $can_client_use_net_ip4 = sub { | |
245c6d23 MR |
486 | my ($self, $req, $network) = @_; |
487 | my ($found); | |
4a195854 MR |
488 | |
489 | # Is client allowed to request IP? | |
490 | $found = 0; | |
491 | if ($self->{_config}->{$network}->{allow}) { | |
245c6d23 MR |
492 | $self->$logger("Allow: " . Dumper($self->{_config}->{$network}->{allow})); |
493 | foreach (@{$self->{_config}->{$network}->{allow}}) { | |
494 | if ($_ eq $self->$get_mac_ip4($req)) { | |
4a195854 MR |
495 | $found = 1; |
496 | last; | |
497 | } | |
48b79db9 | 498 | } |
4a195854 MR |
499 | } else { |
500 | $found = 1; | |
48b79db9 | 501 | } |
48b79db9 | 502 | |
4a195854 MR |
503 | return $found; |
504 | }; | |
505 | ||
4a195854 | 506 | my $add_options_ip4 = sub { |
245c6d23 | 507 | my ($self, $resp) = @_; |
48b79db9 MR |
508 | |
509 | if ($self->{lease_time}) { | |
245c6d23 | 510 | $resp->addOptionValue(DHO_DHCP_LEASE_TIME, $self->{lease_time}); |
4a195854 MR |
511 | } |
512 | if ($self->{lease_time_renew}) { | |
245c6d23 | 513 | $resp->addOptionValue(DHO_DHCP_RENEWAL_TIME, $self->{lease_time_renew}); |
48b79db9 MR |
514 | } |
515 | if ($self->{subnet_mask}) { | |
245c6d23 | 516 | $resp->addOptionValue(DHO_SUBNET_MASK, $self->{subnet_mask}); |
48b79db9 MR |
517 | } |
518 | if ($self->{routers}) { | |
245c6d23 | 519 | $resp->addOptionValue(DHO_ROUTERS, $self->{routers}); |
48b79db9 MR |
520 | } |
521 | if ($self->{broadcast_addr}) { | |
245c6d23 | 522 | $resp->addOptionValue(DHO_BROADCAST_ADDRESS, $self->{broadcast_addr}); |
48b79db9 MR |
523 | } |
524 | if ($self->{domain_name}) { | |
245c6d23 | 525 | $resp->addOptionValue(DHO_DOMAIN_NAME, $self->{domain_name}); |
48b79db9 MR |
526 | } |
527 | if ($self->{ntp_servers}) { | |
245c6d23 | 528 | $resp->addOptionValue(DHO_NTP_SERVERS, $self->{ntp_servers}); |
48b79db9 MR |
529 | } |
530 | if ($self->{dns_servers}) { | |
245c6d23 | 531 | $resp->addOptionValue(DHO_DOMAIN_NAME_SERVERS, $self->{dns_servers}); |
48b79db9 | 532 | } |
4a195854 | 533 | }; |
48b79db9 | 534 | |
245c6d23 MR |
535 | my $send_nak = sub { |
536 | my ($self, $req, $message) = @_; | |
537 | ||
538 | $message = 'Bad request' unless $message; | |
539 | my $peeraddr = ($req->ciaddr() && $req->ciaddr() ne inet_ntoa(INADDR_ANY)) ? | |
540 | $req->ciaddr() : inet_ntoa(INADDR_BROADCAST); | |
541 | ||
542 | my $sock = IO::Socket::IP->new( | |
543 | Broadcast => 1, | |
544 | PeerPort => 68, | |
545 | PeerAddr => $peeraddr, | |
546 | Proto => 'udp' | |
547 | ) || do { | |
548 | my $err = $@; | |
549 | $self->$logger("[discover_ip4] Socket creation error: $err", ERROR); | |
550 | die "[discover_ip4] Socket creation error: $err\n"; | |
551 | }; | |
552 | ||
553 | my $resp = new Net::DHCP::Packet( | |
554 | Comment => $req->comment(), | |
555 | Op => BOOTREPLY(), | |
556 | Hops => $req->hops(), | |
557 | Xid => $req->xid(), | |
558 | Flags => $req->flags(), | |
559 | Ciaddr => $req->ciaddr(), | |
560 | Yiaddr => "0.0.0.0", | |
561 | Siaddr => $req->siaddr(), | |
562 | Giaddr => $req->giaddr(), | |
563 | Chaddr => $req->chaddr(), | |
564 | DHO_DHCP_MESSAGE_TYPE() => DHCPNAK(), | |
565 | DHO_DHCP_MESSAGE(), $message, | |
566 | ); | |
567 | ||
568 | $self->$logger("Sending NAK to " . $sock->peerhost . ':' . $sock->peerport . | |
569 | "\nReason: $message", INFO); | |
570 | $self->$logger($resp->toString()); | |
571 | ||
572 | my $xid = $req->xid() ? $req->xid() : 'Missing'; | |
573 | $self->$logger("Sending OFFER tr=$xid", INFO); | |
574 | ||
575 | $sock->send($resp->serialize()) || die "Error sending OFFER: $!\n"; | |
576 | $sock->close; | |
577 | }; | |
578 | ||
579 | my $send_accept = sub { | |
580 | my ($self, $req, $calc_ip, $reply) = @_; | |
581 | my $msg; | |
582 | ||
583 | my $peeraddr = ($req->ciaddr() && $req->ciaddr() ne inet_ntoa(INADDR_ANY)) ? | |
584 | $req->ciaddr() : inet_ntoa(INADDR_BROADCAST); | |
585 | ||
586 | if ($reply == DHCP_OFFER) { | |
587 | $reply = DHCPOFFER(); | |
588 | $msg = 'DHCP_OFFER'; | |
589 | } elsif ($reply == DHCP_ACK) { | |
590 | $reply = DHCPACK(); | |
591 | $msg = 'DHCP_ACK'; | |
4a195854 | 592 | } else { |
245c6d23 MR |
593 | my $err = "$reply: Unknown reply"; |
594 | $self->$logger($err, ERROR); | |
595 | die $err; | |
4a195854 MR |
596 | } |
597 | ||
245c6d23 MR |
598 | my $sock = IO::Socket::IP->new( |
599 | Broadcast => 1, | |
600 | PeerPort => 68, | |
601 | PeerAddr => $peeraddr, | |
602 | Proto => 'udp' | |
603 | ) || do { | |
604 | my $err = $@; | |
605 | $self->$logger("[discover_ip4] Socket creation error: $err", ERROR); | |
606 | die "[discover_ip4] Socket creation error: $err\n"; | |
607 | }; | |
4a195854 | 608 | |
245c6d23 MR |
609 | my $resp = new Net::DHCP::Packet( |
610 | Comment => $req->comment(), | |
611 | Op => BOOTREPLY(), | |
612 | Hops => $req->hops(), | |
613 | Xid => $req->xid(), | |
614 | Flags => $req->flags(), | |
615 | Ciaddr => $req->ciaddr(), | |
616 | Yiaddr => $calc_ip, | |
617 | Siaddr => $req->siaddr(), | |
618 | Giaddr => $req->giaddr(), | |
619 | Chaddr => $req->chaddr(), | |
620 | DHO_DHCP_MESSAGE_TYPE() => $reply, | |
621 | DHO_DHCP_SERVER_IDENTIFIER() => $sock->sockhost | |
622 | ); | |
623 | $self->$add_options_ip4($resp); | |
624 | my $xid = $req->xid(); | |
625 | $self->{_transaction}->{$xid}->{me} = $sock->sockhost; | |
626 | ||
627 | $self->$logger("Sending $msg to " . $sock->peerhost . ':' . $sock->peerport, INFO); | |
628 | $self->$logger($resp->toString()); | |
629 | ||
630 | $self->$logger("Sending OFFER tr=".$req->xid(), INFO); | |
631 | ||
632 | $sock->send($resp->serialize()) || die "Error sending $msg: $!\n"; | |
633 | $sock->close; | |
4a195854 MR |
634 | }; |
635 | ||
245c6d23 MR |
636 | my $update_transaction = sub { |
637 | my ($self, $req, $tx) = @_; | |
638 | my ($res, $xid, $offer); | |
4a195854 | 639 | |
245c6d23 MR |
640 | $xid = $req->xid(); |
641 | return -1 unless $xid; | |
4a195854 | 642 | |
245c6d23 MR |
643 | if ($tx) { |
644 | $self->{_transaction}->{$xid} = $tx; | |
645 | $res = 0; | |
646 | } else { | |
647 | if ($self->{_transaction}->{$xid} && $self->{_transaction}->{$xid}->{me}) { | |
648 | my $me = $req->getOptionValue(DHO_DHCP_SERVER_IDENTIFIER()); | |
649 | $me = $req->ciaddr() unless $me; | |
650 | $offer = $self->{_transaction}->{$xid}->{offer_ip}; | |
651 | if ($me) { | |
652 | if ($me ne $self->{_transaction}->{$xid}->{me}) { | |
653 | # Another DHCP server is chosen by client | |
654 | $self->$logger("$me: Offer '".($offer? $offer : 'None')."' refused by client xid=$xid", INFO); | |
655 | delete($self->{_transaction}->{$xid}); | |
656 | delete($self->{_leases}->{$offer}) if $offer; | |
657 | $self->$write_lease_file(); | |
658 | $res = 1; | |
4a195854 | 659 | } else { |
245c6d23 MR |
660 | $self->$logger("Offer '$offer' accepted by client xid=$xid", INFO); |
661 | $res = 0; | |
4a195854 | 662 | } |
245c6d23 MR |
663 | } else { |
664 | # Caught request for other DHCP server | |
4a195854 | 665 | } |
245c6d23 MR |
666 | } else { |
667 | if ($self->{_transaction}->{$xid}) { | |
668 | $offer = $self->{_transaction}->{$xid}->{offer_ip}; | |
669 | $self->$logger("Offer '$offer' wait approval from client xid=$xid", INFO); | |
670 | $res = 0; | |
4a195854 MR |
671 | } |
672 | } | |
245c6d23 | 673 | } |
4a195854 | 674 | |
245c6d23 MR |
675 | return $res; |
676 | }; | |
4a195854 | 677 | |
245c6d23 MR |
678 | my $create_new_lease_ip4 = sub { |
679 | my ($self, $req, $network) = @_; | |
680 | my $lease; | |
681 | ||
682 | $lease->{'hardware ethernet'} = $self->$get_mac_ip4($req); | |
683 | my $client = $req->getOptionValue(DHO_HOST_NAME()); | |
684 | $lease->{'client-hostname'} = $client ? $client : $self->$get_mac_ip4($req); | |
685 | $lease->{'binding state'} = 'active'; | |
686 | my $start = time; | |
687 | my $end = $start + $self->{_config}->{$network}->{ttl}; | |
688 | $lease->{starts} = $self->$convert_timestamp($start, 0); | |
689 | $lease->{ends} = $self->$convert_timestamp($end, 0); | |
690 | ||
691 | return $lease; | |
692 | }; | |
693 | ||
694 | my $add_lease_ip4 = sub { | |
695 | my ($self, $req, $network, $ip) = @_; | |
696 | ||
697 | my $lease = $self->$create_new_lease_ip4($req, $network); | |
698 | $self->$add_lease($ip, $lease); | |
699 | $self->{lease_time} = $DEFAULT_LEASE; | |
700 | if ($self->{_config}->{$network}->{ttl}) { | |
701 | $self->{lease_time} = $self->{_config}->{$network}->{ttl}; | |
702 | } | |
703 | $self->{lease_time_renew} = $DEFAULT_LEASE_RENEW; | |
704 | if ($self->{_config}->{$network}->{rttl}) { | |
705 | $self->{lease_time_renew} = $self->{_config}->{$network}->{rttl}; | |
4a195854 | 706 | } |
245c6d23 MR |
707 | if ($self->{_config}->{$network}->{netmask}) { |
708 | $self->{subnet_mask} = $self->{_config}->{$network}->{netmask}; | |
709 | } | |
710 | if ($self->{_config}->{$network}->{router}) { | |
711 | $self->{routers} = $self->{_config}->{$network}->{router}; | |
712 | } | |
713 | if ($self->{_config}->{$network}->{broadcast}) { | |
714 | $self->{broadcast_addr} = $self->{_config}->{$network}->{broadcast}; | |
715 | } | |
716 | if ($self->{_config}->{$network}->{'domain-name'}) { | |
717 | $self->{domain_name} = $self->{_config}->{$network}->{'domain-name'}; | |
718 | } | |
719 | if ($self->{_config}->{$network}->{'dns-servers'}) { | |
720 | $self->{dns_servers} = $self->{_config}->{$network}->{'dns-servers'}; | |
721 | } | |
722 | if ($self->{_config}->{$network}->{'ntp-servers'}) { | |
723 | $self->{ntp_servers} = $self->{_config}->{$network}->{'ntp-servers'}; | |
724 | } | |
725 | }; | |
4a195854 | 726 | |
245c6d23 MR |
727 | my $find_ip_ip4 = sub { |
728 | my ($self, $req, $network, $reqaddr) = @_; | |
729 | my ($start, $end, $ip); | |
730 | ||
731 | my @range_str = split(/\s+/, $self->{_config}->{$network}->{range}); | |
732 | $self->$logger("Range: " . $range_str[0] . " - " . $range_str[1], INFO); | |
733 | $start = NetAddr::IP->new($range_str[0].'/'.$self->{_config}->{$network}->{netmask}); | |
734 | $end = NetAddr::IP->new($range_str[1].'/'.$self->{_config}->{$network}->{netmask}); | |
735 | $self->$logger(Dumper($start) . Dumper($end)); | |
736 | ||
737 | if ($reqaddr) { | |
738 | my $request = NetAddr::IP->new($reqaddr); | |
739 | if ($start->numeric() <= $request->numeric() && $request->numeric() <= $start->numeric()) { | |
740 | my $cip = $request->addr(); | |
741 | $self->$logger("[find_ip_ip4] reqaddr: $reqaddr IP: $cip", INFO); | |
742 | if ($self->{_leases}->{$cip}) { | |
743 | my $lease = $self->{_leases}->{$cip}; | |
744 | my $mac = $self->$get_mac_ip4($req); | |
745 | if ($lease->{'hardware ethernet'} eq $mac) { | |
746 | $ip = $cip; | |
747 | } | |
748 | } else { | |
749 | $ip = $cip; | |
4a195854 | 750 | } |
245c6d23 MR |
751 | } |
752 | } else { | |
753 | my $free = undef; | |
754 | for (; $start <= $end; $start = $start + 1) { | |
755 | my $cip = $start->addr(); | |
756 | $self->$logger("[find_ip_ip4] IP: $cip"); | |
757 | if ($self->{_leases}->{$cip} && ! $free) { | |
758 | my $lease = $self->{_leases}->{$cip}; | |
759 | my $mac = $self->$get_mac_ip4($req); | |
760 | if ($lease->{'hardware ethernet'} eq $mac) { | |
761 | $ip = $cip; | |
762 | } elsif ($lease->{'binding state'} eq 'free') { | |
763 | $free = $cip; | |
764 | } | |
765 | } else { | |
766 | $ip = $cip; | |
4a195854 | 767 | } |
245c6d23 MR |
768 | last if $ip; |
769 | } | |
770 | if (! $ip && $free) { | |
771 | $ip = $free; | |
4a195854 MR |
772 | } |
773 | } | |
774 | ||
245c6d23 MR |
775 | $self->$logger("[find_ip_ip4] IP: " . ($ip ? $ip : 'None'), INFO); |
776 | ||
4a195854 MR |
777 | return $ip; |
778 | }; | |
779 | ||
245c6d23 MR |
780 | my $calculate_net_ip4 = sub { |
781 | my ($self, $req, $req_addr) = @_; | |
782 | my ($network, $net, $ip); | |
783 | ||
784 | $self->$logger("Req IP: " . ($req_addr ? $req_addr : 'None'), INFO); | |
785 | foreach $net (keys %{$self->{_config}}) { | |
786 | my $opt = $self->{_config}->{$net}; | |
787 | $self->$logger("Network: $net/$opt->{netmask}\n" . Dumper($opt), INFO); | |
788 | $network = $net if ($self->$can_client_use_net_ip4($req, $net)); | |
789 | if ($network) { | |
790 | if ($req_addr) { | |
791 | $ip = $self->$find_ip_ip4($req, $network, $req_addr); | |
792 | } else { | |
793 | $ip = $self->$find_ip_ip4($req, $network); | |
4a195854 | 794 | } |
245c6d23 MR |
795 | last if $ip; |
796 | $network = undef; | |
4a195854 MR |
797 | } |
798 | } | |
245c6d23 MR |
799 | $self->$logger("Network: " . ($network ? $network : 'None') . " IP: " . ($ip ? $ip : 'None'), INFO); |
800 | ||
801 | return ($network, $ip); | |
802 | }; | |
803 | ||
804 | my $calculate_ip_ip4 = sub { | |
805 | my ($self, $req, $state, $reqaddr) = @_; | |
806 | my ($network, $ip); | |
807 | ||
808 | if ($state == DHCP_OFFER) { | |
809 | if ($reqaddr) { | |
810 | ($network, $ip) = $self->$calculate_net_ip4($req, $reqaddr); | |
4a195854 | 811 | } else { |
245c6d23 MR |
812 | ($network, $ip) = $self->$calculate_net_ip4($req); |
813 | } | |
814 | } elsif ($state == DHCP_ACK) { | |
815 | # If no $reqaddr then client fail | |
816 | if ($reqaddr) { | |
817 | my $xid = $req->xid(); | |
818 | if ($self->{_transaction}->{$xid}) { | |
819 | my $offer = $self->{_transaction}->{$xid}->{offer_ip}; | |
820 | if ($offer eq $reqaddr) { | |
821 | $network = $self->{_transaction}->{$xid}->{network}; | |
822 | $ip = $self->{_transaction}->{$xid}->{offer_ip} | |
823 | } | |
824 | delete($self->{_transaction}->{$xid}); | |
825 | } else { | |
826 | # No prior discovery. We maintain transaction | |
827 | ($network, $ip) = $self->$calculate_net_ip4($req, $reqaddr); | |
828 | } | |
4a195854 MR |
829 | } |
830 | } else { | |
4a195854 MR |
831 | } |
832 | ||
245c6d23 | 833 | return ($network, $ip); |
4a195854 MR |
834 | }; |
835 | ||
836 | my $discover_ip4 = sub { | |
245c6d23 MR |
837 | my ($self, $req) = @_; |
838 | my ($tx, $res, $resp, $network, $calc_ip, $req_addr); | |
48b79db9 | 839 | |
245c6d23 | 840 | $self->$logger("Got ip4 discover request: \n" . $req->toString(), INFO); |
48b79db9 | 841 | |
245c6d23 MR |
842 | $res = $self->$update_transaction($req); |
843 | if ($res) { | |
844 | my $err = "Missing transaction ID"; | |
845 | $self->$send_nak($req, $err); | |
846 | $self->$logger($err, ERROR); | |
847 | die $err; | |
848 | } | |
48b79db9 | 849 | |
245c6d23 MR |
850 | $req_addr = $req->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
851 | $res = $self->$read_lease_file(); | |
852 | $self->$logger("Starting with empty lease file", INFO) unless $res; | |
48b79db9 | 853 | |
48b79db9 | 854 | |
4a195854 | 855 | if ($self->{LOG_LEVEL} <= INFO) { |
4a195854 | 856 | if ($req_addr) { |
245c6d23 | 857 | $self->$logger("[D] Requested IP: $req_addr", INFO); |
4a195854 | 858 | } else { |
245c6d23 | 859 | $self->$logger("[D] Requested IP: None", INFO); |
4a195854 MR |
860 | } |
861 | } | |
245c6d23 MR |
862 | |
863 | $tx->{req_ip} = $req_addr ? $req_addr : 'None'; | |
864 | ||
865 | ($network, $calc_ip) = $self->$calculate_ip_ip4($req, DHCP_OFFER, $req_addr); | |
866 | $tx->{offer_ip} = $calc_ip ? $calc_ip : 'None'; | |
867 | $tx->{network} = $network ? $network : 'None'; | |
868 | ||
869 | $self->$logger("Offer: $tx->{offer_ip}"); | |
870 | ||
871 | if ($network && $calc_ip) { | |
872 | $self->$logger("Creating lease for $calc_ip", INFO); | |
873 | $res = $self->$update_transaction($req, $tx); | |
874 | if ($res) { | |
875 | my $err = "Could not create transaction"; | |
876 | $self->$logger($err, ERROR); | |
877 | $self->$send_nak($req, $err); | |
878 | } else { | |
879 | $self->$add_lease_ip4($req, $network, $calc_ip); | |
880 | $res = $self->$write_lease_file(); | |
881 | if (! $res) { | |
882 | my $err = "Could not write lease file. Bailing"; | |
883 | $self->$logger($err, ERROR); | |
884 | my $xid = $req->xid(); | |
885 | delete($self->{_transaction}->{$xid}); | |
886 | $self->$send_nak($req, $err); | |
887 | } else { | |
888 | $self->$send_accept($req, $calc_ip, DHCP_OFFER); | |
889 | } | |
890 | } | |
48b79db9 MR |
891 | } else { |
892 | # bad request, we send a NAK | |
245c6d23 MR |
893 | my $err = "$req_addr: Not available"; |
894 | $self->$logger($err, INFO); | |
895 | $self->$send_nak($req, $err); | |
48b79db9 MR |
896 | } |
897 | ||
245c6d23 | 898 | $self->$logger("Transaction:\n".Dumper($self->{_transaction}), INFO); |
4a195854 | 899 | }; |
48b79db9 | 900 | |
4a195854 | 901 | my $request_ip4 = sub { |
245c6d23 MR |
902 | my ($self, $req) = @_; |
903 | my ($calc_ip, $network, $res); | |
904 | ||
905 | $self->$logger("Got request\n".$req->toString()); | |
906 | ||
907 | $res = $self->$update_transaction($req); | |
908 | if ($res) { | |
909 | if ($res < 0) { | |
910 | my $err = "Missing transaction ID"; | |
911 | $self->$send_nak($req, $err); | |
912 | $self->$logger($err, ERROR); | |
913 | die $err; | |
914 | } else { | |
915 | return; | |
916 | } | |
917 | } | |
48b79db9 | 918 | |
245c6d23 MR |
919 | my $req_addr = $req->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
920 | if ($self->{LOG_LEVEL} <= INFO) { | |
921 | if ($req_addr) { | |
922 | $self->$logger("[R] Requested IP: $req_addr", INFO); | |
923 | } else { | |
924 | $self->$logger("[R] Requested IP: None", INFO); | |
925 | } | |
4a195854 MR |
926 | } |
927 | ||
245c6d23 MR |
928 | ($network, $calc_ip) = $self->$calculate_ip_ip4($req, DHCP_ACK, $req_addr); |
929 | if ($network && $calc_ip) { | |
930 | $self->$logger("Creating lease for $calc_ip", INFO); | |
931 | $self->$add_lease_ip4($req, $network, $calc_ip); | |
932 | $res = $self->$write_lease_file(); | |
933 | if (! $res) { | |
934 | my $err = "Could not write lease file. Bailing"; | |
935 | $self->$logger($err, ERROR); | |
936 | $self->$send_nak($req, $err); | |
937 | } else { | |
938 | $self->$send_accept($req, $calc_ip, DHCP_ACK); | |
939 | } | |
48b79db9 MR |
940 | } else { |
941 | # bad request, we send a NAK | |
245c6d23 | 942 | $self->$send_nak($req); |
48b79db9 MR |
943 | } |
944 | ||
245c6d23 MR |
945 | # This transaction is finished with either NAK or ACK |
946 | my $xid = $req->xid(); | |
947 | delete($self->{_transaction}->{$xid}); | |
48b79db9 | 948 | |
245c6d23 | 949 | $self->$logger("Transaction:\n".Dumper($self->{_transaction}), INFO); |
4a195854 | 950 | }; |
48b79db9 | 951 | |
4a195854 | 952 | my $release_ip4 = sub { |
21630ca3 | 953 | my ($self, $req) = @_; |
4a195854 | 954 | my ($ip, $mac); |
48b79db9 | 955 | |
21630ca3 MR |
956 | $self->$logger($req->toString()); |
957 | $ip = $req->ciaddr(); | |
958 | $mac = $self->$get_mac_ip4($req); | |
4a195854 | 959 | $self->$logger("Release request for IP: $ip MAC: $mac", INFO); |
48b79db9 | 960 | |
4a195854 MR |
961 | if ($self->{_leases}->{$ip}) { |
962 | my $lease = $self->{_leases}->{$ip}; | |
963 | if ($lease->{'hardware ethernet'} eq $mac) { | |
21630ca3 | 964 | $self->$logger("Set binding state free IP: $ip MAC: $mac", INFO); |
4a195854 | 965 | $lease->{'binding state'} = 'free'; |
21630ca3 | 966 | $self->$write_lease_file(); |
4a195854 | 967 | } |
4a195854 | 968 | } |
245c6d23 | 969 | $self->$logger("Transaction:\n".Dumper($self->{_transaction}), INFO); |
4a195854 MR |
970 | }; |
971 | ||
972 | ######################################################################### | |
973 | # Private methods which handle DHCP6 requests | |
974 | ######################################################################### | |
975 | ||
976 | my $excuse_me_ip6 = sub { | |
245c6d23 | 977 | my ($self, $addr, $req) = @_; |
48b79db9 | 978 | |
245c6d23 | 979 | $self->$logger("IPv6 request from [$addr]: $req", INFO); |
21630ca3 | 980 | my $sock = IO::Socket::IP->new( |
48b79db9 MR |
981 | Domain => PF_INET6, |
982 | V6Only => 1, | |
983 | Broadcast => 1, | |
984 | PeerPort => 546, | |
985 | PeerAddr => $addr, | |
986 | Proto => 'udp', | |
987 | ) || do { | |
988 | my $err = $@; | |
4a195854 | 989 | $self->$logger("[excuse_me_ip6] Socket creation error: $err", ERROR); |
48b79db9 MR |
990 | die "[excuse_me_ip6] Socket creation error: $err\n"; |
991 | }; | |
4a195854 | 992 | $self->$logger("$addr: Not implemented here", INFO); |
21630ca3 MR |
993 | $sock->send("Not implemented here") || die "Error sending excuse: $!\n"; |
994 | $sock->close; | |
4a195854 MR |
995 | }; |
996 | ||
997 | ######################################################################### | |
998 | # Public methods | |
999 | ######################################################################### | |
1000 | ||
1001 | # generic signal handler to cause daemon to stop | |
1002 | sub signal_handler { | |
1003 | $time_to_die = 1; | |
1004 | } | |
1005 | $SIG{INT} = $SIG{TERM} = $SIG{HUP} = \&signal_handler; | |
1006 | ||
1007 | # ignore any PIPE signal: standard behaviour is to quit process | |
1008 | $SIG{PIPE} = 'IGNORE'; | |
1009 | ||
1010 | sub new { | |
1011 | my ($class, %self) = @_; | |
1012 | ||
1013 | # OOP stuff | |
1014 | $class = ref($class) || $class; | |
1015 | my $self = \%self; | |
1016 | bless $self, $class; | |
1017 | ||
1018 | # private | |
1019 | $self->{_sock_in_ip4} = undef; | |
4a195854 | 1020 | $self->{_sock_in_ip6} = undef; |
4a195854 MR |
1021 | $self->{_leases} = undef; |
1022 | $self->{_reverse} = undef; | |
1023 | $self->{_config} = undef; | |
4a195854 | 1024 | $self->{_dhpcp_ip4} = undef; |
245c6d23 | 1025 | $self->{_transaction} = (); |
4a195854 MR |
1026 | |
1027 | # public | |
1028 | $self->{log_file} ||= 'syslog'; | |
1029 | $self->{lease_time} ||= $DEFAULT_LEASE; | |
1030 | $self->{lease_time_renew} ||= $DEFAULT_LEASE_RENEW; | |
1031 | $self->{subnet_mask} ||= undef; | |
1032 | $self->{routers} ||= undef; | |
1033 | $self->{broadcast_addr} ||= undef; | |
1034 | $self->{domain_name} ||= undef; | |
1035 | $self->{dns_servers} ||= undef; | |
1036 | $self->{ntp_servers} ||= undef; | |
1037 | $self->{LOG_LEVEL} = ERROR unless defined $self->{LOG_LEVEL}; | |
1038 | $self->{NODAEMON} ||= 0; | |
1039 | $self->{DEBUG} ||= 0; | |
1040 | $self->{timeout} ||= 10; | |
1041 | $self->{lease_file} ||= '/tmp/dhcpd.leases'; | |
1042 | $self->{conf_file} ||= '/tmp/dhcpd.cfg'; | |
dc6fa7b0 | 1043 | $self->{INTERVAL} ||= 5; |
4a195854 MR |
1044 | |
1045 | return $self; | |
1046 | } | |
1047 | ||
1048 | sub run { | |
1049 | my ($self) = @_; | |
1050 | my ($sel, @ready, $socket, $res); | |
1051 | ||
1052 | eval { | |
1053 | $self->$read_config(); | |
1054 | }; | |
1055 | if ($@) { | |
1056 | my $err = $@; | |
1057 | $self->$logger($err, ERROR); | |
1058 | die $err; | |
1059 | } | |
1060 | $self->$logger("Starting dhcpd", INFO); | |
1061 | if ($self->{NODAEMON} < 1) { | |
1062 | $self->$logger("Entering Daemon mode"); | |
1063 | chdir '/' or die "Can't chdir to /: $!"; | |
1064 | umask 0; | |
1065 | ||
1066 | open STDIN, '/dev/null' or die "Can't read /dev/null: $!"; | |
1067 | open STDOUT, '>/dev/null' or die "Can't write to /dev/null: $!"; | |
1068 | open STDERR, '>/dev/null' or die "Can't write to /dev/null: $!"; | |
1069 | ||
1070 | my $pid = fork; | |
1071 | exit if $pid; | |
1072 | do { | |
1073 | my $err = $!; | |
1074 | $self->$logger("Couldn't fork: $err", ERROR); | |
1075 | die "Couldn't fork: $err"; | |
1076 | } unless defined($pid); | |
1077 | ||
1078 | POSIX::setsid() || do { | |
1079 | my $err = $!; | |
1080 | $self->$logger("Can't start a new session: $err", ERROR); | |
1081 | die "Can't start a new session: $err"; | |
1082 | }; | |
1083 | $self->$logger("Now in Daemon mode", INFO); | |
1084 | } | |
1085 | ||
1086 | $res = $self->$read_lease_file(); | |
1087 | $self->$logger("Starting with empty leases file '$self->{lease_file}'", INFO) | |
1088 | if (! $res || ! $self->{_leases}); | |
1089 | ||
1090 | $self->$logger("Initialization complete", INFO); | |
1091 | ||
1092 | # open listening socket | |
1093 | $self->{_sock_in_ip4} = IO::Socket::IP->new( | |
1094 | Domain => PF_INET, | |
1095 | LocalPort => 67, | |
1096 | LocalAddr => inet_ntoa(INADDR_ANY), | |
1097 | Proto => 'udp' | |
1098 | ) || do { | |
1099 | my $err = $@; | |
1100 | $self->$logger("IP4 Socket creation error: $err", ERROR); | |
1101 | die "IP4 Socket creation error: $err\n"; | |
1102 | }; | |
1103 | $self->{_sock_in_ip6} = IO::Socket::IP->new( | |
1104 | Domain => PF_INET6, | |
1105 | V6Only => 1, | |
1106 | LocalPort => 547, | |
1107 | LocalAddr => '::', | |
1108 | Proto => 'udp' | |
1109 | ) || do { | |
1110 | my $err = $@; | |
1111 | $self->$logger("IP6 Socket creation error: $err", ERROR); | |
1112 | die "IP6 Socket creation error: $err\n"; | |
1113 | }; | |
1114 | ||
1115 | $sel = IO::Select->new($self->{_sock_in_ip4}); | |
1116 | $sel->add($self->{_sock_in_ip6}); | |
1117 | ||
dc6fa7b0 MR |
1118 | my $last_run = time; |
1119 | ||
4a195854 MR |
1120 | until ($time_to_die) { |
1121 | my $buf = undef; | |
1122 | my $fromaddr; | |
245c6d23 | 1123 | my $req; |
4a195854 MR |
1124 | |
1125 | eval { # catch fatal errors | |
1126 | while (@ready = $sel->can_read) { | |
1127 | $self->$logger("Waiting for incoming packet", INFO); | |
dc6fa7b0 | 1128 | $last_run = $self->$cleanup_leases($last_run); |
4a195854 MR |
1129 | foreach $socket (@ready) { |
1130 | if ($socket == $self->{_sock_in_ip4}) { | |
1131 | # receive ipv4 packet | |
21630ca3 | 1132 | $fromaddr = $socket->recv($buf, 4096) |
4a195854 MR |
1133 | || $self->$logger("recv: $!", ERROR); |
1134 | next if ($!); # continue loop if an error occured | |
245c6d23 MR |
1135 | |
1136 | $req = new Net::DHCP::Packet($buf); | |
4a195854 MR |
1137 | |
1138 | { | |
1139 | use bytes; | |
245c6d23 MR |
1140 | my $xid = $req->xid(); |
1141 | $xid = $xid ? $xid : 'None'; | |
4a195854 MR |
1142 | my ($port,$addr) = unpack_sockaddr_in($fromaddr); |
1143 | my $ipaddr = inet_ntoa($addr); | |
245c6d23 | 1144 | $self->$logger("Got a packet tr=$xid src=$ipaddr:$port length=".length($buf), INFO); |
4a195854 MR |
1145 | } |
1146 | ||
245c6d23 | 1147 | my $messagetype = $req->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
4a195854 MR |
1148 | |
1149 | if ($messagetype eq DHCPDISCOVER()) { | |
245c6d23 | 1150 | $self->$discover_ip4($req); |
4a195854 | 1151 | } elsif ($messagetype eq DHCPREQUEST()) { |
245c6d23 | 1152 | $self->$request_ip4($req); |
4a195854 MR |
1153 | } elsif ($messagetype eq DHCPINFORM()) { |
1154 | $self->$logger("Not implemented: DHCPINFORM", WARNING); | |
1155 | } elsif ($messagetype eq DHCPRELEASE()) { | |
245c6d23 | 1156 | $self->$release_ip4($req); |
4a195854 | 1157 | } else { |
245c6d23 | 1158 | $self->$logger("$messagetype: Packet dropped since unknown message type", WARNING); |
4a195854 MR |
1159 | # bad messagetype, we drop it |
1160 | } | |
1161 | } else { | |
1162 | # Receive ipv6 packet | |
21630ca3 | 1163 | my $myaddr = $socket->sockhost; |
4a195854 | 1164 | |
21630ca3 | 1165 | $fromaddr = $socket->recv($buf, 4096) |
4a195854 MR |
1166 | || $self->$logger("recv: $!", ERROR); |
1167 | next if ($!); # continue loop if an error occured | |
4a195854 MR |
1168 | $self->$logger("recv: $buf", INFO); |
1169 | { | |
1170 | use bytes; | |
1171 | my ($port,$addr) = unpack_sockaddr_in6($fromaddr); | |
1172 | my $ipaddr = inet_ntop(AF_INET6, $addr); | |
1173 | $self->$logger("Got a packet tr=$self->{_transaction_ip6} src=$ipaddr:$port length=".length($buf), INFO); | |
1174 | } | |
1175 | $self->$excuse_me_ip6($myaddr, $buf); | |
1176 | } | |
1177 | } | |
1178 | } | |
1179 | }; # end of 'eval' blocks | |
1180 | if ($@) { | |
1181 | $self->$logger("Caught error in main loop: $@", ERROR); | |
1182 | } | |
1183 | } | |
1184 | $self->{_sock_in_ip4}->close; | |
1185 | $self->{_sock_in_ip6}->close; | |
1186 | $self->$logger("Exiting dhcpd", INFO); | |
48b79db9 MR |
1187 | } |
1188 | ||
1189 | 1; |