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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 | |
4a195854 MR |
435 | ######################################################################### |
436 | # Private methods which handle DHCP4 requests | |
437 | ######################################################################### | |
48b79db9 | 438 | |
4a195854 | 439 | my $get_mac_ip4 = sub { |
245c6d23 | 440 | my ($self, $req) = @_; |
4a195854 | 441 | my $mac; |
48b79db9 | 442 | |
245c6d23 | 443 | $mac = $req->chaddr(); |
4a195854 | 444 | $mac =~ s/0+$//; |
48b79db9 | 445 | |
4a195854 MR |
446 | return $mac; |
447 | }; | |
448 | ||
449 | my $can_client_use_net_ip4 = sub { | |
245c6d23 MR |
450 | my ($self, $req, $network) = @_; |
451 | my ($found); | |
4a195854 MR |
452 | |
453 | # Is client allowed to request IP? | |
454 | $found = 0; | |
455 | if ($self->{_config}->{$network}->{allow}) { | |
245c6d23 MR |
456 | $self->$logger("Allow: " . Dumper($self->{_config}->{$network}->{allow})); |
457 | foreach (@{$self->{_config}->{$network}->{allow}}) { | |
458 | if ($_ eq $self->$get_mac_ip4($req)) { | |
4a195854 MR |
459 | $found = 1; |
460 | last; | |
461 | } | |
48b79db9 | 462 | } |
4a195854 MR |
463 | } else { |
464 | $found = 1; | |
48b79db9 | 465 | } |
48b79db9 | 466 | |
4a195854 MR |
467 | return $found; |
468 | }; | |
469 | ||
4a195854 | 470 | my $add_options_ip4 = sub { |
245c6d23 | 471 | my ($self, $resp) = @_; |
48b79db9 MR |
472 | |
473 | if ($self->{lease_time}) { | |
245c6d23 | 474 | $resp->addOptionValue(DHO_DHCP_LEASE_TIME, $self->{lease_time}); |
4a195854 MR |
475 | } |
476 | if ($self->{lease_time_renew}) { | |
245c6d23 | 477 | $resp->addOptionValue(DHO_DHCP_RENEWAL_TIME, $self->{lease_time_renew}); |
48b79db9 MR |
478 | } |
479 | if ($self->{subnet_mask}) { | |
245c6d23 | 480 | $resp->addOptionValue(DHO_SUBNET_MASK, $self->{subnet_mask}); |
48b79db9 MR |
481 | } |
482 | if ($self->{routers}) { | |
245c6d23 | 483 | $resp->addOptionValue(DHO_ROUTERS, $self->{routers}); |
48b79db9 MR |
484 | } |
485 | if ($self->{broadcast_addr}) { | |
245c6d23 | 486 | $resp->addOptionValue(DHO_BROADCAST_ADDRESS, $self->{broadcast_addr}); |
48b79db9 MR |
487 | } |
488 | if ($self->{domain_name}) { | |
245c6d23 | 489 | $resp->addOptionValue(DHO_DOMAIN_NAME, $self->{domain_name}); |
48b79db9 MR |
490 | } |
491 | if ($self->{ntp_servers}) { | |
245c6d23 | 492 | $resp->addOptionValue(DHO_NTP_SERVERS, $self->{ntp_servers}); |
48b79db9 MR |
493 | } |
494 | if ($self->{dns_servers}) { | |
245c6d23 | 495 | $resp->addOptionValue(DHO_DOMAIN_NAME_SERVERS, $self->{dns_servers}); |
48b79db9 | 496 | } |
4a195854 | 497 | }; |
48b79db9 | 498 | |
245c6d23 MR |
499 | my $send_nak = sub { |
500 | my ($self, $req, $message) = @_; | |
501 | ||
502 | $message = 'Bad request' unless $message; | |
503 | my $peeraddr = ($req->ciaddr() && $req->ciaddr() ne inet_ntoa(INADDR_ANY)) ? | |
504 | $req->ciaddr() : inet_ntoa(INADDR_BROADCAST); | |
505 | ||
506 | my $sock = IO::Socket::IP->new( | |
507 | Broadcast => 1, | |
508 | PeerPort => 68, | |
509 | PeerAddr => $peeraddr, | |
510 | Proto => 'udp' | |
511 | ) || do { | |
512 | my $err = $@; | |
513 | $self->$logger("[discover_ip4] Socket creation error: $err", ERROR); | |
514 | die "[discover_ip4] Socket creation error: $err\n"; | |
515 | }; | |
516 | ||
517 | my $resp = new Net::DHCP::Packet( | |
518 | Comment => $req->comment(), | |
519 | Op => BOOTREPLY(), | |
520 | Hops => $req->hops(), | |
521 | Xid => $req->xid(), | |
522 | Flags => $req->flags(), | |
523 | Ciaddr => $req->ciaddr(), | |
524 | Yiaddr => "0.0.0.0", | |
525 | Siaddr => $req->siaddr(), | |
526 | Giaddr => $req->giaddr(), | |
527 | Chaddr => $req->chaddr(), | |
528 | DHO_DHCP_MESSAGE_TYPE() => DHCPNAK(), | |
529 | DHO_DHCP_MESSAGE(), $message, | |
530 | ); | |
531 | ||
532 | $self->$logger("Sending NAK to " . $sock->peerhost . ':' . $sock->peerport . | |
533 | "\nReason: $message", INFO); | |
534 | $self->$logger($resp->toString()); | |
535 | ||
536 | my $xid = $req->xid() ? $req->xid() : 'Missing'; | |
537 | $self->$logger("Sending OFFER tr=$xid", INFO); | |
538 | ||
539 | $sock->send($resp->serialize()) || die "Error sending OFFER: $!\n"; | |
540 | $sock->close; | |
541 | }; | |
542 | ||
543 | my $send_accept = sub { | |
544 | my ($self, $req, $calc_ip, $reply) = @_; | |
545 | my $msg; | |
546 | ||
547 | my $peeraddr = ($req->ciaddr() && $req->ciaddr() ne inet_ntoa(INADDR_ANY)) ? | |
548 | $req->ciaddr() : inet_ntoa(INADDR_BROADCAST); | |
549 | ||
550 | if ($reply == DHCP_OFFER) { | |
551 | $reply = DHCPOFFER(); | |
552 | $msg = 'DHCP_OFFER'; | |
553 | } elsif ($reply == DHCP_ACK) { | |
554 | $reply = DHCPACK(); | |
555 | $msg = 'DHCP_ACK'; | |
4a195854 | 556 | } else { |
245c6d23 MR |
557 | my $err = "$reply: Unknown reply"; |
558 | $self->$logger($err, ERROR); | |
559 | die $err; | |
4a195854 MR |
560 | } |
561 | ||
245c6d23 MR |
562 | my $sock = IO::Socket::IP->new( |
563 | Broadcast => 1, | |
564 | PeerPort => 68, | |
565 | PeerAddr => $peeraddr, | |
566 | Proto => 'udp' | |
567 | ) || do { | |
568 | my $err = $@; | |
569 | $self->$logger("[discover_ip4] Socket creation error: $err", ERROR); | |
570 | die "[discover_ip4] Socket creation error: $err\n"; | |
571 | }; | |
4a195854 | 572 | |
245c6d23 MR |
573 | my $resp = new Net::DHCP::Packet( |
574 | Comment => $req->comment(), | |
575 | Op => BOOTREPLY(), | |
576 | Hops => $req->hops(), | |
577 | Xid => $req->xid(), | |
578 | Flags => $req->flags(), | |
579 | Ciaddr => $req->ciaddr(), | |
580 | Yiaddr => $calc_ip, | |
581 | Siaddr => $req->siaddr(), | |
582 | Giaddr => $req->giaddr(), | |
583 | Chaddr => $req->chaddr(), | |
584 | DHO_DHCP_MESSAGE_TYPE() => $reply, | |
585 | DHO_DHCP_SERVER_IDENTIFIER() => $sock->sockhost | |
586 | ); | |
587 | $self->$add_options_ip4($resp); | |
588 | my $xid = $req->xid(); | |
589 | $self->{_transaction}->{$xid}->{me} = $sock->sockhost; | |
590 | ||
591 | $self->$logger("Sending $msg to " . $sock->peerhost . ':' . $sock->peerport, INFO); | |
592 | $self->$logger($resp->toString()); | |
593 | ||
594 | $self->$logger("Sending OFFER tr=".$req->xid(), INFO); | |
595 | ||
596 | $sock->send($resp->serialize()) || die "Error sending $msg: $!\n"; | |
597 | $sock->close; | |
4a195854 MR |
598 | }; |
599 | ||
245c6d23 MR |
600 | my $update_transaction = sub { |
601 | my ($self, $req, $tx) = @_; | |
602 | my ($res, $xid, $offer); | |
4a195854 | 603 | |
245c6d23 MR |
604 | $xid = $req->xid(); |
605 | return -1 unless $xid; | |
4a195854 | 606 | |
245c6d23 MR |
607 | if ($tx) { |
608 | $self->{_transaction}->{$xid} = $tx; | |
609 | $res = 0; | |
610 | } else { | |
611 | if ($self->{_transaction}->{$xid} && $self->{_transaction}->{$xid}->{me}) { | |
612 | my $me = $req->getOptionValue(DHO_DHCP_SERVER_IDENTIFIER()); | |
613 | $me = $req->ciaddr() unless $me; | |
614 | $offer = $self->{_transaction}->{$xid}->{offer_ip}; | |
615 | if ($me) { | |
616 | if ($me ne $self->{_transaction}->{$xid}->{me}) { | |
617 | # Another DHCP server is chosen by client | |
618 | $self->$logger("$me: Offer '".($offer? $offer : 'None')."' refused by client xid=$xid", INFO); | |
619 | delete($self->{_transaction}->{$xid}); | |
620 | delete($self->{_leases}->{$offer}) if $offer; | |
621 | $self->$write_lease_file(); | |
622 | $res = 1; | |
4a195854 | 623 | } else { |
245c6d23 MR |
624 | $self->$logger("Offer '$offer' accepted by client xid=$xid", INFO); |
625 | $res = 0; | |
4a195854 | 626 | } |
245c6d23 MR |
627 | } else { |
628 | # Caught request for other DHCP server | |
4a195854 | 629 | } |
245c6d23 MR |
630 | } else { |
631 | if ($self->{_transaction}->{$xid}) { | |
632 | $offer = $self->{_transaction}->{$xid}->{offer_ip}; | |
633 | $self->$logger("Offer '$offer' wait approval from client xid=$xid", INFO); | |
634 | $res = 0; | |
4a195854 MR |
635 | } |
636 | } | |
245c6d23 | 637 | } |
4a195854 | 638 | |
245c6d23 MR |
639 | return $res; |
640 | }; | |
4a195854 | 641 | |
245c6d23 MR |
642 | my $create_new_lease_ip4 = sub { |
643 | my ($self, $req, $network) = @_; | |
644 | my $lease; | |
645 | ||
646 | $lease->{'hardware ethernet'} = $self->$get_mac_ip4($req); | |
647 | my $client = $req->getOptionValue(DHO_HOST_NAME()); | |
648 | $lease->{'client-hostname'} = $client ? $client : $self->$get_mac_ip4($req); | |
649 | $lease->{'binding state'} = 'active'; | |
650 | my $start = time; | |
651 | my $end = $start + $self->{_config}->{$network}->{ttl}; | |
652 | $lease->{starts} = $self->$convert_timestamp($start, 0); | |
653 | $lease->{ends} = $self->$convert_timestamp($end, 0); | |
654 | ||
655 | return $lease; | |
656 | }; | |
657 | ||
658 | my $add_lease_ip4 = sub { | |
659 | my ($self, $req, $network, $ip) = @_; | |
660 | ||
661 | my $lease = $self->$create_new_lease_ip4($req, $network); | |
662 | $self->$add_lease($ip, $lease); | |
663 | $self->{lease_time} = $DEFAULT_LEASE; | |
664 | if ($self->{_config}->{$network}->{ttl}) { | |
665 | $self->{lease_time} = $self->{_config}->{$network}->{ttl}; | |
666 | } | |
667 | $self->{lease_time_renew} = $DEFAULT_LEASE_RENEW; | |
668 | if ($self->{_config}->{$network}->{rttl}) { | |
669 | $self->{lease_time_renew} = $self->{_config}->{$network}->{rttl}; | |
4a195854 | 670 | } |
245c6d23 MR |
671 | if ($self->{_config}->{$network}->{netmask}) { |
672 | $self->{subnet_mask} = $self->{_config}->{$network}->{netmask}; | |
673 | } | |
674 | if ($self->{_config}->{$network}->{router}) { | |
675 | $self->{routers} = $self->{_config}->{$network}->{router}; | |
676 | } | |
677 | if ($self->{_config}->{$network}->{broadcast}) { | |
678 | $self->{broadcast_addr} = $self->{_config}->{$network}->{broadcast}; | |
679 | } | |
680 | if ($self->{_config}->{$network}->{'domain-name'}) { | |
681 | $self->{domain_name} = $self->{_config}->{$network}->{'domain-name'}; | |
682 | } | |
683 | if ($self->{_config}->{$network}->{'dns-servers'}) { | |
684 | $self->{dns_servers} = $self->{_config}->{$network}->{'dns-servers'}; | |
685 | } | |
686 | if ($self->{_config}->{$network}->{'ntp-servers'}) { | |
687 | $self->{ntp_servers} = $self->{_config}->{$network}->{'ntp-servers'}; | |
688 | } | |
689 | }; | |
4a195854 | 690 | |
245c6d23 MR |
691 | my $find_ip_ip4 = sub { |
692 | my ($self, $req, $network, $reqaddr) = @_; | |
693 | my ($start, $end, $ip); | |
694 | ||
695 | my @range_str = split(/\s+/, $self->{_config}->{$network}->{range}); | |
696 | $self->$logger("Range: " . $range_str[0] . " - " . $range_str[1], INFO); | |
697 | $start = NetAddr::IP->new($range_str[0].'/'.$self->{_config}->{$network}->{netmask}); | |
698 | $end = NetAddr::IP->new($range_str[1].'/'.$self->{_config}->{$network}->{netmask}); | |
699 | $self->$logger(Dumper($start) . Dumper($end)); | |
700 | ||
701 | if ($reqaddr) { | |
702 | my $request = NetAddr::IP->new($reqaddr); | |
703 | if ($start->numeric() <= $request->numeric() && $request->numeric() <= $start->numeric()) { | |
704 | my $cip = $request->addr(); | |
705 | $self->$logger("[find_ip_ip4] reqaddr: $reqaddr IP: $cip", INFO); | |
706 | if ($self->{_leases}->{$cip}) { | |
707 | my $lease = $self->{_leases}->{$cip}; | |
708 | my $mac = $self->$get_mac_ip4($req); | |
709 | if ($lease->{'hardware ethernet'} eq $mac) { | |
710 | $ip = $cip; | |
711 | } | |
712 | } else { | |
713 | $ip = $cip; | |
4a195854 | 714 | } |
245c6d23 MR |
715 | } |
716 | } else { | |
717 | my $free = undef; | |
718 | for (; $start <= $end; $start = $start + 1) { | |
719 | my $cip = $start->addr(); | |
720 | $self->$logger("[find_ip_ip4] IP: $cip"); | |
721 | if ($self->{_leases}->{$cip} && ! $free) { | |
722 | my $lease = $self->{_leases}->{$cip}; | |
723 | my $mac = $self->$get_mac_ip4($req); | |
724 | if ($lease->{'hardware ethernet'} eq $mac) { | |
725 | $ip = $cip; | |
726 | } elsif ($lease->{'binding state'} eq 'free') { | |
727 | $free = $cip; | |
728 | } | |
729 | } else { | |
730 | $ip = $cip; | |
4a195854 | 731 | } |
245c6d23 MR |
732 | last if $ip; |
733 | } | |
734 | if (! $ip && $free) { | |
735 | $ip = $free; | |
4a195854 MR |
736 | } |
737 | } | |
738 | ||
245c6d23 MR |
739 | $self->$logger("[find_ip_ip4] IP: " . ($ip ? $ip : 'None'), INFO); |
740 | ||
4a195854 MR |
741 | return $ip; |
742 | }; | |
743 | ||
245c6d23 MR |
744 | my $calculate_net_ip4 = sub { |
745 | my ($self, $req, $req_addr) = @_; | |
746 | my ($network, $net, $ip); | |
747 | ||
748 | $self->$logger("Req IP: " . ($req_addr ? $req_addr : 'None'), INFO); | |
749 | foreach $net (keys %{$self->{_config}}) { | |
750 | my $opt = $self->{_config}->{$net}; | |
751 | $self->$logger("Network: $net/$opt->{netmask}\n" . Dumper($opt), INFO); | |
752 | $network = $net if ($self->$can_client_use_net_ip4($req, $net)); | |
753 | if ($network) { | |
754 | if ($req_addr) { | |
755 | $ip = $self->$find_ip_ip4($req, $network, $req_addr); | |
756 | } else { | |
757 | $ip = $self->$find_ip_ip4($req, $network); | |
4a195854 | 758 | } |
245c6d23 MR |
759 | last if $ip; |
760 | $network = undef; | |
4a195854 MR |
761 | } |
762 | } | |
245c6d23 MR |
763 | $self->$logger("Network: " . ($network ? $network : 'None') . " IP: " . ($ip ? $ip : 'None'), INFO); |
764 | ||
765 | return ($network, $ip); | |
766 | }; | |
767 | ||
768 | my $calculate_ip_ip4 = sub { | |
769 | my ($self, $req, $state, $reqaddr) = @_; | |
770 | my ($network, $ip); | |
771 | ||
772 | if ($state == DHCP_OFFER) { | |
773 | if ($reqaddr) { | |
774 | ($network, $ip) = $self->$calculate_net_ip4($req, $reqaddr); | |
4a195854 | 775 | } else { |
245c6d23 MR |
776 | ($network, $ip) = $self->$calculate_net_ip4($req); |
777 | } | |
778 | } elsif ($state == DHCP_ACK) { | |
779 | # If no $reqaddr then client fail | |
780 | if ($reqaddr) { | |
781 | my $xid = $req->xid(); | |
782 | if ($self->{_transaction}->{$xid}) { | |
783 | my $offer = $self->{_transaction}->{$xid}->{offer_ip}; | |
784 | if ($offer eq $reqaddr) { | |
785 | $network = $self->{_transaction}->{$xid}->{network}; | |
786 | $ip = $self->{_transaction}->{$xid}->{offer_ip} | |
787 | } | |
788 | delete($self->{_transaction}->{$xid}); | |
789 | } else { | |
790 | # No prior discovery. We maintain transaction | |
791 | ($network, $ip) = $self->$calculate_net_ip4($req, $reqaddr); | |
792 | } | |
4a195854 MR |
793 | } |
794 | } else { | |
4a195854 MR |
795 | } |
796 | ||
245c6d23 | 797 | return ($network, $ip); |
4a195854 MR |
798 | }; |
799 | ||
800 | my $discover_ip4 = sub { | |
245c6d23 MR |
801 | my ($self, $req) = @_; |
802 | my ($tx, $res, $resp, $network, $calc_ip, $req_addr); | |
48b79db9 | 803 | |
245c6d23 | 804 | $self->$logger("Got ip4 discover request: \n" . $req->toString(), INFO); |
48b79db9 | 805 | |
245c6d23 MR |
806 | $res = $self->$update_transaction($req); |
807 | if ($res) { | |
808 | my $err = "Missing transaction ID"; | |
809 | $self->$send_nak($req, $err); | |
810 | $self->$logger($err, ERROR); | |
811 | die $err; | |
812 | } | |
48b79db9 | 813 | |
245c6d23 MR |
814 | $req_addr = $req->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
815 | $res = $self->$read_lease_file(); | |
816 | $self->$logger("Starting with empty lease file", INFO) unless $res; | |
48b79db9 | 817 | |
48b79db9 | 818 | |
4a195854 | 819 | if ($self->{LOG_LEVEL} <= INFO) { |
4a195854 | 820 | if ($req_addr) { |
245c6d23 | 821 | $self->$logger("[D] Requested IP: $req_addr", INFO); |
4a195854 | 822 | } else { |
245c6d23 | 823 | $self->$logger("[D] Requested IP: None", INFO); |
4a195854 MR |
824 | } |
825 | } | |
245c6d23 MR |
826 | |
827 | $tx->{req_ip} = $req_addr ? $req_addr : 'None'; | |
828 | ||
829 | ($network, $calc_ip) = $self->$calculate_ip_ip4($req, DHCP_OFFER, $req_addr); | |
830 | $tx->{offer_ip} = $calc_ip ? $calc_ip : 'None'; | |
831 | $tx->{network} = $network ? $network : 'None'; | |
832 | ||
833 | $self->$logger("Offer: $tx->{offer_ip}"); | |
834 | ||
835 | if ($network && $calc_ip) { | |
836 | $self->$logger("Creating lease for $calc_ip", INFO); | |
837 | $res = $self->$update_transaction($req, $tx); | |
838 | if ($res) { | |
839 | my $err = "Could not create transaction"; | |
840 | $self->$logger($err, ERROR); | |
841 | $self->$send_nak($req, $err); | |
842 | } else { | |
843 | $self->$add_lease_ip4($req, $network, $calc_ip); | |
844 | $res = $self->$write_lease_file(); | |
845 | if (! $res) { | |
846 | my $err = "Could not write lease file. Bailing"; | |
847 | $self->$logger($err, ERROR); | |
848 | my $xid = $req->xid(); | |
849 | delete($self->{_transaction}->{$xid}); | |
850 | $self->$send_nak($req, $err); | |
851 | } else { | |
852 | $self->$send_accept($req, $calc_ip, DHCP_OFFER); | |
853 | } | |
854 | } | |
48b79db9 MR |
855 | } else { |
856 | # bad request, we send a NAK | |
245c6d23 MR |
857 | my $err = "$req_addr: Not available"; |
858 | $self->$logger($err, INFO); | |
859 | $self->$send_nak($req, $err); | |
48b79db9 MR |
860 | } |
861 | ||
245c6d23 | 862 | $self->$logger("Transaction:\n".Dumper($self->{_transaction}), INFO); |
4a195854 | 863 | }; |
48b79db9 | 864 | |
4a195854 | 865 | my $request_ip4 = sub { |
245c6d23 MR |
866 | my ($self, $req) = @_; |
867 | my ($calc_ip, $network, $res); | |
868 | ||
869 | $self->$logger("Got request\n".$req->toString()); | |
870 | ||
871 | $res = $self->$update_transaction($req); | |
872 | if ($res) { | |
873 | if ($res < 0) { | |
874 | my $err = "Missing transaction ID"; | |
875 | $self->$send_nak($req, $err); | |
876 | $self->$logger($err, ERROR); | |
877 | die $err; | |
878 | } else { | |
879 | return; | |
880 | } | |
881 | } | |
48b79db9 | 882 | |
245c6d23 MR |
883 | my $req_addr = $req->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); |
884 | if ($self->{LOG_LEVEL} <= INFO) { | |
885 | if ($req_addr) { | |
886 | $self->$logger("[R] Requested IP: $req_addr", INFO); | |
887 | } else { | |
888 | $self->$logger("[R] Requested IP: None", INFO); | |
889 | } | |
4a195854 MR |
890 | } |
891 | ||
245c6d23 MR |
892 | ($network, $calc_ip) = $self->$calculate_ip_ip4($req, DHCP_ACK, $req_addr); |
893 | if ($network && $calc_ip) { | |
894 | $self->$logger("Creating lease for $calc_ip", INFO); | |
895 | $self->$add_lease_ip4($req, $network, $calc_ip); | |
896 | $res = $self->$write_lease_file(); | |
897 | if (! $res) { | |
898 | my $err = "Could not write lease file. Bailing"; | |
899 | $self->$logger($err, ERROR); | |
900 | $self->$send_nak($req, $err); | |
901 | } else { | |
902 | $self->$send_accept($req, $calc_ip, DHCP_ACK); | |
903 | } | |
48b79db9 MR |
904 | } else { |
905 | # bad request, we send a NAK | |
245c6d23 | 906 | $self->$send_nak($req); |
48b79db9 MR |
907 | } |
908 | ||
245c6d23 MR |
909 | # This transaction is finished with either NAK or ACK |
910 | my $xid = $req->xid(); | |
911 | delete($self->{_transaction}->{$xid}); | |
48b79db9 | 912 | |
245c6d23 | 913 | $self->$logger("Transaction:\n".Dumper($self->{_transaction}), INFO); |
4a195854 | 914 | }; |
48b79db9 | 915 | |
4a195854 | 916 | my $release_ip4 = sub { |
21630ca3 | 917 | my ($self, $req) = @_; |
4a195854 | 918 | my ($ip, $mac); |
48b79db9 | 919 | |
21630ca3 MR |
920 | $self->$logger($req->toString()); |
921 | $ip = $req->ciaddr(); | |
922 | $mac = $self->$get_mac_ip4($req); | |
4a195854 | 923 | $self->$logger("Release request for IP: $ip MAC: $mac", INFO); |
48b79db9 | 924 | |
4a195854 MR |
925 | if ($self->{_leases}->{$ip}) { |
926 | my $lease = $self->{_leases}->{$ip}; | |
927 | if ($lease->{'hardware ethernet'} eq $mac) { | |
21630ca3 | 928 | $self->$logger("Set binding state free IP: $ip MAC: $mac", INFO); |
4a195854 | 929 | $lease->{'binding state'} = 'free'; |
21630ca3 | 930 | $self->$write_lease_file(); |
4a195854 | 931 | } |
4a195854 | 932 | } |
245c6d23 | 933 | $self->$logger("Transaction:\n".Dumper($self->{_transaction}), INFO); |
4a195854 MR |
934 | }; |
935 | ||
936 | ######################################################################### | |
937 | # Private methods which handle DHCP6 requests | |
938 | ######################################################################### | |
939 | ||
940 | my $excuse_me_ip6 = sub { | |
245c6d23 | 941 | my ($self, $addr, $req) = @_; |
48b79db9 | 942 | |
245c6d23 | 943 | $self->$logger("IPv6 request from [$addr]: $req", INFO); |
21630ca3 | 944 | my $sock = IO::Socket::IP->new( |
48b79db9 MR |
945 | Domain => PF_INET6, |
946 | V6Only => 1, | |
947 | Broadcast => 1, | |
948 | PeerPort => 546, | |
949 | PeerAddr => $addr, | |
950 | Proto => 'udp', | |
951 | ) || do { | |
952 | my $err = $@; | |
4a195854 | 953 | $self->$logger("[excuse_me_ip6] Socket creation error: $err", ERROR); |
48b79db9 MR |
954 | die "[excuse_me_ip6] Socket creation error: $err\n"; |
955 | }; | |
4a195854 | 956 | $self->$logger("$addr: Not implemented here", INFO); |
21630ca3 MR |
957 | $sock->send("Not implemented here") || die "Error sending excuse: $!\n"; |
958 | $sock->close; | |
4a195854 MR |
959 | }; |
960 | ||
961 | ######################################################################### | |
962 | # Public methods | |
963 | ######################################################################### | |
964 | ||
965 | # generic signal handler to cause daemon to stop | |
966 | sub signal_handler { | |
967 | $time_to_die = 1; | |
968 | } | |
969 | $SIG{INT} = $SIG{TERM} = $SIG{HUP} = \&signal_handler; | |
970 | ||
971 | # ignore any PIPE signal: standard behaviour is to quit process | |
972 | $SIG{PIPE} = 'IGNORE'; | |
973 | ||
974 | sub new { | |
975 | my ($class, %self) = @_; | |
976 | ||
977 | # OOP stuff | |
978 | $class = ref($class) || $class; | |
979 | my $self = \%self; | |
980 | bless $self, $class; | |
981 | ||
982 | # private | |
983 | $self->{_sock_in_ip4} = undef; | |
4a195854 | 984 | $self->{_sock_in_ip6} = undef; |
4a195854 MR |
985 | $self->{_leases} = undef; |
986 | $self->{_reverse} = undef; | |
987 | $self->{_config} = undef; | |
4a195854 | 988 | $self->{_dhpcp_ip4} = undef; |
245c6d23 | 989 | $self->{_transaction} = (); |
4a195854 MR |
990 | |
991 | # public | |
992 | $self->{log_file} ||= 'syslog'; | |
993 | $self->{lease_time} ||= $DEFAULT_LEASE; | |
994 | $self->{lease_time_renew} ||= $DEFAULT_LEASE_RENEW; | |
995 | $self->{subnet_mask} ||= undef; | |
996 | $self->{routers} ||= undef; | |
997 | $self->{broadcast_addr} ||= undef; | |
998 | $self->{domain_name} ||= undef; | |
999 | $self->{dns_servers} ||= undef; | |
1000 | $self->{ntp_servers} ||= undef; | |
1001 | $self->{LOG_LEVEL} = ERROR unless defined $self->{LOG_LEVEL}; | |
1002 | $self->{NODAEMON} ||= 0; | |
1003 | $self->{DEBUG} ||= 0; | |
1004 | $self->{timeout} ||= 10; | |
1005 | $self->{lease_file} ||= '/tmp/dhcpd.leases'; | |
1006 | $self->{conf_file} ||= '/tmp/dhcpd.cfg'; | |
1007 | ||
1008 | return $self; | |
1009 | } | |
1010 | ||
1011 | sub run { | |
1012 | my ($self) = @_; | |
1013 | my ($sel, @ready, $socket, $res); | |
1014 | ||
1015 | eval { | |
1016 | $self->$read_config(); | |
1017 | }; | |
1018 | if ($@) { | |
1019 | my $err = $@; | |
1020 | $self->$logger($err, ERROR); | |
1021 | die $err; | |
1022 | } | |
1023 | $self->$logger("Starting dhcpd", INFO); | |
1024 | if ($self->{NODAEMON} < 1) { | |
1025 | $self->$logger("Entering Daemon mode"); | |
1026 | chdir '/' or die "Can't chdir to /: $!"; | |
1027 | umask 0; | |
1028 | ||
1029 | open STDIN, '/dev/null' or die "Can't read /dev/null: $!"; | |
1030 | open STDOUT, '>/dev/null' or die "Can't write to /dev/null: $!"; | |
1031 | open STDERR, '>/dev/null' or die "Can't write to /dev/null: $!"; | |
1032 | ||
1033 | my $pid = fork; | |
1034 | exit if $pid; | |
1035 | do { | |
1036 | my $err = $!; | |
1037 | $self->$logger("Couldn't fork: $err", ERROR); | |
1038 | die "Couldn't fork: $err"; | |
1039 | } unless defined($pid); | |
1040 | ||
1041 | POSIX::setsid() || do { | |
1042 | my $err = $!; | |
1043 | $self->$logger("Can't start a new session: $err", ERROR); | |
1044 | die "Can't start a new session: $err"; | |
1045 | }; | |
1046 | $self->$logger("Now in Daemon mode", INFO); | |
1047 | } | |
1048 | ||
1049 | $res = $self->$read_lease_file(); | |
1050 | $self->$logger("Starting with empty leases file '$self->{lease_file}'", INFO) | |
1051 | if (! $res || ! $self->{_leases}); | |
1052 | ||
1053 | $self->$logger("Initialization complete", INFO); | |
1054 | ||
1055 | # open listening socket | |
1056 | $self->{_sock_in_ip4} = IO::Socket::IP->new( | |
1057 | Domain => PF_INET, | |
1058 | LocalPort => 67, | |
1059 | LocalAddr => inet_ntoa(INADDR_ANY), | |
1060 | Proto => 'udp' | |
1061 | ) || do { | |
1062 | my $err = $@; | |
1063 | $self->$logger("IP4 Socket creation error: $err", ERROR); | |
1064 | die "IP4 Socket creation error: $err\n"; | |
1065 | }; | |
1066 | $self->{_sock_in_ip6} = IO::Socket::IP->new( | |
1067 | Domain => PF_INET6, | |
1068 | V6Only => 1, | |
1069 | LocalPort => 547, | |
1070 | LocalAddr => '::', | |
1071 | Proto => 'udp' | |
1072 | ) || do { | |
1073 | my $err = $@; | |
1074 | $self->$logger("IP6 Socket creation error: $err", ERROR); | |
1075 | die "IP6 Socket creation error: $err\n"; | |
1076 | }; | |
1077 | ||
1078 | $sel = IO::Select->new($self->{_sock_in_ip4}); | |
1079 | $sel->add($self->{_sock_in_ip6}); | |
1080 | ||
1081 | until ($time_to_die) { | |
1082 | my $buf = undef; | |
1083 | my $fromaddr; | |
245c6d23 | 1084 | my $req; |
4a195854 MR |
1085 | |
1086 | eval { # catch fatal errors | |
1087 | while (@ready = $sel->can_read) { | |
1088 | $self->$logger("Waiting for incoming packet", INFO); | |
1089 | foreach $socket (@ready) { | |
1090 | if ($socket == $self->{_sock_in_ip4}) { | |
1091 | # receive ipv4 packet | |
21630ca3 | 1092 | $fromaddr = $socket->recv($buf, 4096) |
4a195854 MR |
1093 | || $self->$logger("recv: $!", ERROR); |
1094 | next if ($!); # continue loop if an error occured | |
245c6d23 MR |
1095 | |
1096 | $req = new Net::DHCP::Packet($buf); | |
4a195854 MR |
1097 | |
1098 | { | |
1099 | use bytes; | |
245c6d23 MR |
1100 | my $xid = $req->xid(); |
1101 | $xid = $xid ? $xid : 'None'; | |
4a195854 MR |
1102 | my ($port,$addr) = unpack_sockaddr_in($fromaddr); |
1103 | my $ipaddr = inet_ntoa($addr); | |
245c6d23 | 1104 | $self->$logger("Got a packet tr=$xid src=$ipaddr:$port length=".length($buf), INFO); |
4a195854 MR |
1105 | } |
1106 | ||
245c6d23 | 1107 | my $messagetype = $req->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); |
4a195854 MR |
1108 | |
1109 | if ($messagetype eq DHCPDISCOVER()) { | |
245c6d23 | 1110 | $self->$discover_ip4($req); |
4a195854 | 1111 | } elsif ($messagetype eq DHCPREQUEST()) { |
245c6d23 | 1112 | $self->$request_ip4($req); |
4a195854 MR |
1113 | } elsif ($messagetype eq DHCPINFORM()) { |
1114 | $self->$logger("Not implemented: DHCPINFORM", WARNING); | |
1115 | } elsif ($messagetype eq DHCPRELEASE()) { | |
245c6d23 | 1116 | $self->$release_ip4($req); |
4a195854 | 1117 | } else { |
245c6d23 | 1118 | $self->$logger("$messagetype: Packet dropped since unknown message type", WARNING); |
4a195854 MR |
1119 | # bad messagetype, we drop it |
1120 | } | |
1121 | } else { | |
1122 | # Receive ipv6 packet | |
21630ca3 | 1123 | my $myaddr = $socket->sockhost; |
4a195854 | 1124 | |
21630ca3 | 1125 | $fromaddr = $socket->recv($buf, 4096) |
4a195854 MR |
1126 | || $self->$logger("recv: $!", ERROR); |
1127 | next if ($!); # continue loop if an error occured | |
4a195854 MR |
1128 | $self->$logger("recv: $buf", INFO); |
1129 | { | |
1130 | use bytes; | |
1131 | my ($port,$addr) = unpack_sockaddr_in6($fromaddr); | |
1132 | my $ipaddr = inet_ntop(AF_INET6, $addr); | |
1133 | $self->$logger("Got a packet tr=$self->{_transaction_ip6} src=$ipaddr:$port length=".length($buf), INFO); | |
1134 | } | |
1135 | $self->$excuse_me_ip6($myaddr, $buf); | |
1136 | } | |
1137 | } | |
1138 | } | |
1139 | }; # end of 'eval' blocks | |
1140 | if ($@) { | |
1141 | $self->$logger("Caught error in main loop: $@", ERROR); | |
1142 | } | |
1143 | } | |
1144 | $self->{_sock_in_ip4}->close; | |
1145 | $self->{_sock_in_ip6}->close; | |
1146 | $self->$logger("Exiting dhcpd", INFO); | |
48b79db9 MR |
1147 | } |
1148 | ||
1149 | 1; |