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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 MR |
22 | use constant { |
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 | }; | |
32 | ||
33 | use Exporter; | |
34 | our @ISA = qw(Exporter); | |
4a195854 MR |
35 | our @EXPORT = qw( |
36 | run | |
37 | DEBUG | |
38 | INFO | |
39 | NOTICE | |
40 | WARNING | |
41 | ERROR | |
42 | CRITICAL | |
43 | ALERT | |
44 | EMERGENCY | |
48b79db9 MR |
45 | ); |
46 | ||
48b79db9 MR |
47 | our $VERSION = '0.01'; |
48 | our $NAME = 'PVE::DHCPServer'; | |
4a195854 MR |
49 | our $DEFAULT_LEASE = 7200; |
50 | our $DEFAULT_LEASE_RENEW = 5400; | |
48b79db9 MR |
51 | my $time_to_die = 0; |
52 | ||
4a195854 MR |
53 | ######################################################################### |
54 | # Private methods | |
55 | ######################################################################### | |
48b79db9 | 56 | |
4a195854 MR |
57 | my $logger = sub { |
58 | my ($self, $message, $level) = @_; | |
48b79db9 | 59 | |
4a195854 MR |
60 | $level ||= DEBUG; |
61 | return unless ($level >= $self->{LOG_LEVEL}); | |
48b79db9 | 62 | |
4a195854 MR |
63 | $level = "debug" if $level eq DEBUG; |
64 | $level = "info" if $level eq INFO; | |
65 | $level = "notice" if $level eq NOTICE; | |
66 | $level = "warning" if $level eq WARNING; | |
67 | $level = "err" if $level eq ERROR; | |
68 | $level = "crit" if $level eq CRITICAL; | |
69 | $level = "alert" if $level eq ALERT; | |
70 | $level = "emerg" if $level eq EMERGENCY; | |
48b79db9 | 71 | |
4a195854 MR |
72 | if ($self->{DEBUG}) { |
73 | print STDOUT strftime "[%d/%b/%Y:%H:%M:%S] ", localtime; | |
74 | print STDOUT "$level: " . ($message ? $message : 'No message') . "\n"; | |
75 | } elsif ($self->{log_file} eq 'syslog') { | |
76 | openlog($NAME, 'ndelay,pid', 'user'); | |
77 | syslog($level, $message); | |
78 | closelog(); | |
79 | } else { | |
80 | my $fh = new IO::File; | |
81 | if (! $fh->open("> $self->{log_file}")) { | |
82 | croak "$self->{log_file}: $!"; | |
48b79db9 | 83 | } |
4a195854 MR |
84 | print $fh strftime "[%d/%b/%Y:%H:%M:%S] ", localtime; |
85 | print $fh "$level: $message\n"; | |
86 | undef $fh; | |
48b79db9 | 87 | } |
4a195854 | 88 | }; |
48b79db9 | 89 | |
4a195854 | 90 | my $run_with_timeout = sub { |
48b79db9 MR |
91 | my ($self, $code, @param) = @_; |
92 | ||
93 | die "got timeout" if $self->{timeout} <= 0; | |
94 | ||
95 | my $prev_alarm; | |
96 | ||
97 | my $sigcount = 0; | |
98 | ||
99 | my $res; | |
100 | ||
101 | local $SIG{ALRM} = sub { $sigcount++; }; # catch alarm outside eval | |
102 | ||
103 | eval { | |
104 | local $SIG{ALRM} = sub { $sigcount++; die "got timeout"; }; | |
105 | local $SIG{PIPE} = sub { $sigcount++; die "broken pipe" }; | |
106 | local $SIG{__DIE__}; # see SA bug 4631 | |
107 | ||
108 | $prev_alarm = alarm($self->{timeout}); | |
109 | ||
110 | $res = &$code(@param); | |
111 | ||
112 | alarm(0); # avoid race conditions | |
113 | }; | |
114 | ||
115 | my $err = $@; | |
116 | ||
117 | alarm($prev_alarm) if defined($prev_alarm); | |
118 | ||
119 | die "unknown error" if $sigcount && !$err; # seems to happen sometimes | |
120 | ||
121 | die $err if $err; | |
122 | ||
123 | return $res; | |
4a195854 | 124 | }; |
48b79db9 | 125 | |
4a195854 | 126 | my $lock = sub { |
cb0a294f | 127 | my ($self, $file, $shared) = @_; |
48b79db9 MR |
128 | |
129 | my $mode = $shared ? LOCK_SH : LOCK_EX; | |
130 | ||
131 | my $lock_func = sub { | |
132 | if ($mode == LOCK_SH) { | |
cb0a294f MR |
133 | $self->{file_handle} = new IO::File ("<$file") || |
134 | die "can't open file '$file' for read - $!"; | |
48b79db9 | 135 | } else { |
cb0a294f MR |
136 | $self->{file_handle} = new IO::File (">$file") || |
137 | die "can't open file '$file' for write - $!"; | |
48b79db9 | 138 | } |
4a195854 | 139 | $self->$logger("trying to aquire lock on '$file'..."); |
48b79db9 MR |
140 | if (!flock ($self->{file_handle}, $mode|LOCK_NB)) { |
141 | my $success; | |
142 | while(1) { | |
143 | $success = flock($self->{file_handle}, $mode); | |
144 | # try again on EINTR (see bug #273) | |
145 | if ($success || ($! != EINTR)) { | |
146 | last; | |
147 | } | |
148 | } | |
149 | if ($mode == LOCK_SH) { | |
150 | seek($self->{file_handle}, 0, SEEK_END) or $success = 0; | |
151 | } | |
152 | if (!$success) { | |
4a195854 | 153 | $self->$logger(" failed"); |
48b79db9 MR |
154 | die "can't aquire lock - $!"; |
155 | } | |
156 | } | |
4a195854 | 157 | $self->$logger(" OK"); |
48b79db9 MR |
158 | }; |
159 | ||
160 | my $res; | |
161 | my $err = undef; | |
162 | ||
163 | eval { | |
4a195854 | 164 | $res = $self->$run_with_timeout($lock_func); |
48b79db9 MR |
165 | }; |
166 | if ($@) { | |
4a195854 | 167 | $self->$logger("can't lock file '$file' - $@", ERROR); |
48b79db9 MR |
168 | $self->{file_handle} = undef; |
169 | return undef; | |
170 | } | |
171 | ||
172 | return $res; | |
4a195854 | 173 | }; |
48b79db9 | 174 | |
4a195854 | 175 | my $unlock = sub { |
cb0a294f | 176 | my ($self, $file) = @_; |
48b79db9 MR |
177 | |
178 | return '' unless($self->{file_handle}); | |
179 | my $unlock_func = sub { | |
4a195854 | 180 | $self->$logger("trying to unlock '$file'..."); |
48b79db9 MR |
181 | if (!flock($self->{file_handle}, LOCK_UN)) { |
182 | ||
183 | my $success; | |
184 | while(1) { | |
185 | $success = flock($self->{file_handle}, LOCK_UN); | |
186 | # try again on EINTR (see bug #273) | |
187 | if ($success || ($! != EINTR)) { | |
188 | last; | |
189 | } | |
190 | } | |
191 | if (!$success) { | |
4a195854 | 192 | $self->$logger(" failed"); |
48b79db9 MR |
193 | die "can't unlock - $!"; |
194 | } | |
195 | } | |
4a195854 | 196 | $self->$logger(" OK"); |
48b79db9 MR |
197 | }; |
198 | ||
199 | my $res; | |
200 | my $err = undef; | |
201 | ||
202 | eval { | |
4a195854 | 203 | $res = $self->$run_with_timeout($unlock_func); |
48b79db9 MR |
204 | }; |
205 | if ($@) { | |
4a195854 | 206 | $self->$logger("can't lock file '$file' - $@", ERROR); |
48b79db9 MR |
207 | $self->{file_handle} = undef; |
208 | $res = undef; | |
209 | } | |
210 | ||
211 | return $res; | |
4a195854 | 212 | }; |
48b79db9 | 213 | |
4a195854 | 214 | my $convert_timestamp = sub { |
48b79db9 MR |
215 | my ($self, $timestamp, $strtotime) = @_; |
216 | my ($res, $mday, $mon, $year, $hour, $min, $sec); | |
217 | ||
4a195854 | 218 | $self->$logger("Timestamp: $timestamp"); |
48b79db9 MR |
219 | if ($strtotime) { |
220 | if ($timestamp !~ /^\d{4}\/\d{2}\/\d{2}\s+\d{2}:\d{2}:\d{2}$/) { | |
4a195854 | 221 | $self->$logger("$timestamp: (strtotime) Bad format", ERROR); |
48b79db9 MR |
222 | $res = undef; |
223 | } else { | |
224 | ($year,$mon,$mday,$hour,$min,$sec) = split(/[\s\/:]+/, $timestamp); | |
225 | $res = timelocal($sec,$min,$hour,$mday,$mon-1,$year); | |
226 | } | |
227 | } else{ | |
4a195854 | 228 | $self->$logger($timestamp); |
48b79db9 | 229 | if ($timestamp !~ /^\d+$/) { |
4a195854 | 230 | $self->$logger("$timestamp: (timetostr) Bad format", ERROR); |
48b79db9 MR |
231 | $res = undef; |
232 | } else { | |
233 | ($sec,$min,$hour,$mday,$mon,$year) = localtime($timestamp); | |
4a195854 | 234 | $self->$logger("Timestamp: $sec,$min,$hour,$mday,$mon,$year"); |
48b79db9 | 235 | $res = sprintf("%d/%02d/%02d %02d:%02d:%02d", ($year+1900),($mon+1),$mday,$hour,$min,$sec); |
4a195854 | 236 | $self->$logger("Timestamp: $res"); |
48b79db9 MR |
237 | } |
238 | } | |
239 | ||
240 | return $res; | |
4a195854 | 241 | }; |
48b79db9 MR |
242 | |
243 | ||
4a195854 | 244 | my $add_lease = sub { |
48b79db9 MR |
245 | my ($self, $ip, $lease) = @_; |
246 | my $ts; | |
247 | ||
248 | my $mac = $lease->{'hardware ethernet'}; | |
249 | $mac =~ tr/://d; | |
250 | $lease->{'hardware ethernet'} = $mac; | |
4a195854 | 251 | $ts = $self->$convert_timestamp($lease->{starts}, 1); |
48b79db9 MR |
252 | return unless $ts; |
253 | $lease->{starts} = $ts; | |
4a195854 | 254 | $ts = $self->$convert_timestamp($lease->{ends}, 1); |
48b79db9 MR |
255 | return unless $ts; |
256 | $lease->{ends} = $ts; | |
257 | ||
258 | $self->{_leases}->{$ip} = $lease; | |
4a195854 | 259 | $self->$logger(Dumper($self->{_leases}->{$ip})); |
48b79db9 | 260 | $self->{_reverse}->{$mac} = $ip; |
4a195854 MR |
261 | $self->$logger("$mac => $self->{_reverse}->{$mac}"); |
262 | }; | |
48b79db9 MR |
263 | |
264 | #lease vvv.xxx.yyy.zzz { | |
265 | # starts yyyy/mm/dd hh:mm:ss; | |
266 | # ends yyyy/mm/dd hh:mm:ss; | |
267 | # binding state active|free; | |
268 | # hardware ethernet MAC; | |
269 | # client-hostname "name" | |
270 | #} | |
4a195854 | 271 | my $read_lease_file = sub { |
48b79db9 MR |
272 | my ($self) = @_; |
273 | my ($res, $key, $lease); | |
274 | my $error = 0; | |
275 | ||
4a195854 MR |
276 | # Start with empty leases file? |
277 | if (! -e $self->{lease_file}) { | |
278 | return 0; | |
279 | } | |
280 | ||
281 | $self->$lock($self->{lease_file}, 1); | |
48b79db9 MR |
282 | if ($self->{file_handle}) { |
283 | my $fh = $self->{file_handle}; | |
284 | my @lines = <$fh>; | |
285 | foreach (@lines) { | |
4a195854 | 286 | $self->$logger("Read: $_"); |
48b79db9 | 287 | if ($_ =~ /^\s*lease\s+([\d\.]+)\s+{\s*/) { |
4a195854 | 288 | $self->$add_lease($key, $lease) if $lease; |
48b79db9 MR |
289 | $key = $1; |
290 | $lease = undef; | |
291 | $error = 0; | |
4a195854 | 292 | $self->$logger("Key: $key"); |
48b79db9 MR |
293 | } else { |
294 | next if $error; | |
a23b2728 | 295 | next if ($_ =~ /^\s*}\s*/ || $_ =~ /^\s*$/ || $_ =~ /^\s*#.*/); |
48b79db9 MR |
296 | if ($_ =~ /^\s*(starts|ends|binding state|hardware ethernet|client-hostname)\s+(.+)\s*;/) { |
297 | $lease->{$1} = $2; | |
4a195854 | 298 | $self->$logger("Key: $1 Value: $2"); |
48b79db9 MR |
299 | } else { |
300 | $key = 'UNDEF' unless $key; | |
4a195854 | 301 | $self->$logger("$key: Bad format", ERROR); |
48b79db9 MR |
302 | $key = undef; |
303 | $lease = undef; | |
304 | $error = 1; | |
305 | } | |
306 | } | |
307 | } | |
308 | if ($lease && !$error) { | |
4a195854 MR |
309 | $self->$logger("Key: $key"); |
310 | $self->$add_lease($key, $lease); | |
48b79db9 | 311 | } |
4a195854 MR |
312 | $self->$logger("Leases data structure: \n" . Dumper($self->{_leases})); |
313 | $self->$unlock($self->{lease_file}); | |
48b79db9 MR |
314 | $res = 1; |
315 | } else { | |
4a195854 | 316 | $self->$logger("Could not read leases file", ERROR); |
48b79db9 MR |
317 | $res = 0; |
318 | } | |
319 | ||
320 | return $res; | |
4a195854 | 321 | }; |
48b79db9 | 322 | |
4a195854 | 323 | my $write_lease_file = sub { |
48b79db9 MR |
324 | my ($self) = @_; |
325 | my $res; | |
326 | ||
4a195854 | 327 | $res = $self->$lock($self->{lease_file}, 0); |
48b79db9 | 328 | if ($self->{file_handle}) { |
4a195854 MR |
329 | if ($self->{_leases}) { |
330 | my $fh = $self->{file_handle}; | |
331 | my %leases = %{$self->{_leases}}; | |
332 | while ((my $lease, my $elems) = each (%leases)) { | |
333 | $self->$logger("Writing: $lease"); | |
334 | print $fh "lease $lease {\n"; | |
335 | while ((my $key, my $val) = each %$elems) { | |
336 | if ($key =~ /^(starts|ends)$/) { | |
337 | $val = $self->$convert_timestamp($val, 0); | |
338 | } | |
339 | $self->$logger("Writing: $key $val"); | |
340 | print $fh "\t$key $val;\n"; | |
48b79db9 | 341 | } |
4a195854 | 342 | print $fh "}\n"; |
48b79db9 | 343 | } |
48b79db9 | 344 | } |
4a195854 | 345 | $self->$unlock($self->{lease_file}); |
48b79db9 MR |
346 | $res = 1; |
347 | } else { | |
4a195854 | 348 | $self->$logger("Could not write leases file", ERROR); |
48b79db9 MR |
349 | $res = 0; |
350 | } | |
351 | ||
352 | return $res; | |
4a195854 | 353 | }; |
48b79db9 | 354 | |
cb0a294f MR |
355 | #subnet 192.168.9.0 netmask 255.255.255.0 { |
356 | # range 192.168.9.2 192.168.9.100; | |
357 | # ttl 7200; | |
358 | # rttl 3600; | |
359 | # router 192.168.9.254; | |
360 | # dns-servers 192.168.2.201; | |
361 | # ntp-servers 192.168.9.254; | |
362 | # broadcast 192.168.9.255; | |
363 | # domain-name "foo.bar"; | |
364 | # { | |
365 | # allow 001cc0c33317,001cc0c33318,001cc0c33319,001cc0c33320; | |
366 | # static 001cc0c33317 192.168.9.100,001cc0c33318 192.168.9.200; | |
367 | # } | |
368 | #} | |
4a195854 | 369 | my $read_config = sub { |
cb0a294f MR |
370 | my ($self) = @_; |
371 | my ($res, $key, $netmask, $config, $subopt); | |
372 | ||
4a195854 | 373 | $self->$lock($self->{conf_file}, 1); |
cb0a294f MR |
374 | if ($self->{file_handle}) { |
375 | my $fh = $self->{file_handle}; | |
376 | my @lines = <$fh>; | |
377 | $subopt = 0; | |
378 | foreach (@lines) { | |
4a195854 | 379 | $self->$logger("Read: $_"); |
cb0a294f MR |
380 | if ($_ =~ /^\s*subnet\s+([\d\.]+)\s+netmask\s+([\d\.]+)\s+{\s*/) { |
381 | $self->{_config}->{$key} = $config if $config; | |
382 | $key = $1; | |
383 | $config = undef; | |
384 | $config->{netmask} = $2; | |
4a195854 | 385 | $self->$logger("Key: $key Netmask: $config->{netmask}"); |
cb0a294f MR |
386 | } else { |
387 | next if (($_ =~ /^\s*}\s*/ && ! $subopt) || $_ =~ /^\s*$/ || $_ =~ /^\s*#.*/); | |
388 | if (! $subopt && $_ =~ /^\s*(range|ttl|rttl|router|dns-servers|ntp-servers|broadcast|domain-name)\s+(.+)\s*;/) { | |
389 | $config->{$1} = $2; | |
4a195854 | 390 | $self->$logger("Key: $1 Value: $2"); |
cb0a294f MR |
391 | } elsif ($subopt &&$_ =~ /^\s*}\s*/) { |
392 | $subopt = 0; | |
393 | } elsif ($subopt || $_ =~ /^\s*{\s*/) { | |
394 | if ($subopt) { | |
395 | if ($_ =~ /^\s*(allow|static)\s+(.+)\s*;/) { | |
2470397f | 396 | my @vals = split(/\s*,\s*/, $2); |
cb0a294f | 397 | $config->{$1} = [@vals]; |
4a195854 | 398 | $self->$logger("Key: $1 Value: $2"); |
cb0a294f MR |
399 | } else { |
400 | $key = 'UNDEF' unless $key; | |
401 | my $err = "$key: 'suboptions' Bad format"; | |
4a195854 | 402 | $self->$logger($err, ERROR); |
cb0a294f MR |
403 | $key = undef; |
404 | $config = undef; | |
405 | die $err; | |
406 | } | |
407 | } else { | |
408 | $subopt = 1; | |
409 | } | |
410 | } else { | |
411 | $key = 'UNDEF' unless $key; | |
412 | my $err = "$key: Bad format"; | |
4a195854 | 413 | $self->$logger($err, ERROR); |
cb0a294f MR |
414 | $key = undef; |
415 | $config = undef; | |
416 | die $err; | |
417 | } | |
418 | } | |
419 | } | |
420 | if ($config) { | |
421 | $self->{_config}->{$key} = $config; | |
422 | } | |
4a195854 MR |
423 | $self->$logger("Config data structure: \n" . Dumper($self->{_config})); |
424 | $self->$unlock($self->{conf_file}); | |
cb0a294f MR |
425 | if (!$self->{_config}) { |
426 | die "Empty config file"; | |
427 | } | |
428 | } else { | |
429 | die "Could not read config file"; | |
430 | } | |
4a195854 | 431 | }; |
cb0a294f | 432 | |
4a195854 MR |
433 | ######################################################################### |
434 | # Private methods which handle DHCP4 requests | |
435 | ######################################################################### | |
48b79db9 | 436 | |
4a195854 MR |
437 | my $get_mac_ip4 = sub { |
438 | my ($self, $dhcpreq) = @_; | |
439 | my $mac; | |
48b79db9 | 440 | |
4a195854 MR |
441 | $mac = $dhcpreq->chaddr(); |
442 | $mac =~ s/0+$//; | |
48b79db9 | 443 | |
4a195854 MR |
444 | return $mac; |
445 | }; | |
446 | ||
447 | my $can_client_use_net_ip4 = sub { | |
448 | my ($self, $dhcpreq, $network) = @_; | |
449 | my (@allow, $found); | |
450 | ||
451 | # Is client allowed to request IP? | |
452 | $found = 0; | |
453 | if ($self->{_config}->{$network}->{allow}) { | |
454 | @allow = $self->{_config}->{$network}->{allow}; | |
455 | $self->$logger("Allow: " . Dumper(@allow)); | |
456 | foreach (@allow) { | |
457 | if ($_ eq $self->$get_mac_ip4($dhcpreq)) { | |
458 | $found = 1; | |
459 | last; | |
460 | } | |
48b79db9 | 461 | } |
4a195854 MR |
462 | } else { |
463 | $found = 1; | |
48b79db9 | 464 | } |
48b79db9 | 465 | |
4a195854 MR |
466 | return $found; |
467 | }; | |
468 | ||
469 | my $create_new_lease_ip4 = sub { | |
470 | my ($self, $dhcpreq, $network, $lease) = @_; | |
471 | ||
472 | if (! $lease) { | |
473 | $lease = (); | |
474 | $lease->{'hardware ethernet'} = $self->$get_mac_ip4($dhcpreq); | |
475 | } | |
476 | my $client = $dhcpreq->getOptionValue(DHO_HOST_NAME()); | |
477 | $lease->{'client-hostname'} = $client ? $client : $self->$get_mac_ip4($dhcpreq); | |
478 | $lease->{'binding state'} = 'active'; | |
479 | my $start = time; | |
480 | my $end = $start + $self->{_config}->{$network}->{ttl}; | |
481 | $lease->{starts} = $self->$convert_timestamp($start, 0); | |
482 | $lease->{ends} = $self->$convert_timestamp($end, 0); | |
483 | ||
484 | return $lease; | |
485 | }; | |
486 | ||
487 | my $add_options_ip4 = sub { | |
488 | my ($self, $dhcpreq) = @_; | |
48b79db9 MR |
489 | |
490 | if ($self->{lease_time}) { | |
4a195854 MR |
491 | $dhcpreq->addOptionValue(DHO_DHCP_LEASE_TIME, $self->{lease_time}); |
492 | } | |
493 | if ($self->{lease_time_renew}) { | |
494 | $dhcpreq->addOptionValue(DHO_DHCP_RENEWAL_TIME, $self->{lease_time_renew}); | |
48b79db9 MR |
495 | } |
496 | if ($self->{subnet_mask}) { | |
4a195854 | 497 | $dhcpreq->addOptionValue(DHO_SUBNET_MASK, $self->{subnet_mask}); |
48b79db9 MR |
498 | } |
499 | if ($self->{routers}) { | |
4a195854 | 500 | $dhcpreq->addOptionValue(DHO_ROUTERS, $self->{routers}); |
48b79db9 MR |
501 | } |
502 | if ($self->{broadcast_addr}) { | |
4a195854 | 503 | $dhcpreq->addOptionValue(DHO_BROADCAST_ADDRESS, $self->{broadcast_addr}); |
48b79db9 MR |
504 | } |
505 | if ($self->{domain_name}) { | |
4a195854 | 506 | $dhcpreq->addOptionValue(DHO_DOMAIN_NAME, $self->{domain_name}); |
48b79db9 MR |
507 | } |
508 | if ($self->{ntp_servers}) { | |
4a195854 | 509 | $dhcpreq->addOptionValue(DHO_NTP_SERVERS, $self->{ntp_servers}); |
48b79db9 MR |
510 | } |
511 | if ($self->{dns_servers}) { | |
4a195854 | 512 | $dhcpreq->addOptionValue(DHO_DOMAIN_NAME_SERVERS, $self->{dns_servers}); |
48b79db9 | 513 | } |
4a195854 | 514 | }; |
48b79db9 | 515 | |
4a195854 | 516 | my $calculate_net_ip4 = sub { |
48b79db9 | 517 | my ($self, $dhcpreq) = @_; |
4a195854 MR |
518 | my ($req_addr, $network); |
519 | ||
520 | $req_addr = $dhcpreq->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); | |
521 | $self->$logger("Req IP: " . ($req_addr ? $req_addr : 'None')); | |
522 | if ($req_addr) { | |
523 | my ($space, $test); | |
524 | my %config = %{$self->{_config}}; | |
525 | while (my ($net, $opt) = each (%config)) { | |
526 | $self->$logger("Network: $net/$opt->{netmask}\n" . Dumper($opt)); | |
527 | $space = NetAddr::IP->new($net, $opt->{netmask}); | |
528 | $test = NetAddr::IP->new($req_addr); | |
529 | if ($space->contains($test)) { | |
530 | $network = $net if ($self->$can_client_use_net_ip4($dhcpreq, $net)); | |
531 | last; | |
532 | } | |
533 | } | |
534 | } else { | |
535 | my ($space, $test); | |
536 | my %config = %{$self->{_config}}; | |
537 | while (my ($net, $opt) = each (%config)) { | |
538 | $self->$logger("Network: $net/$opt->{netmask}\n" . Dumper($opt)); | |
539 | my $can = $self->$can_client_use_net_ip4($dhcpreq, $net); | |
540 | $self->$logger("Network usable: $can"); | |
541 | if ($can) { | |
542 | $network = $net; | |
543 | last; | |
544 | } | |
545 | } | |
546 | } | |
547 | ||
548 | $self->$logger("Network: " . ($network ? $network : 'None')); | |
549 | ||
550 | return $network; | |
551 | }; | |
552 | ||
553 | my $renew_lease_ip4 = sub { | |
554 | my ($self, $dhcpreq, $network, $req_addr) = @_; | |
555 | my ($start, $end, $test, $ip, $lease); | |
556 | ||
557 | my $find_ip_and_lease = sub { | |
558 | my ($reqaddr) = @_; | |
559 | ||
560 | my @range_str = split(/\s+/, $self->{_config}->{$network}->{range}); | |
561 | $self->$logger("Range: " . $range_str[0] . " - " . $range_str[1]); | |
562 | $start = NetAddr::IP->new($range_str[0]); | |
563 | $end = NetAddr::IP->new($range_str[1]); | |
564 | $self->$logger(Dumper($start) . Dumper($end)); | |
565 | ||
566 | if ($reqaddr) { | |
567 | my $request = NetAddr::IP->new($reqaddr); | |
568 | if ($start <= $request && $request <= $start) { | |
569 | my $nip = $start->addr(); | |
570 | $self->$logger("IP: $nip"); | |
571 | if ($self->{_leases}->{$nip}) { | |
572 | $lease = $self->{_leases}->{$nip}; | |
573 | if ($lease->{'binding state'} eq 'free') { | |
574 | $ip = $nip; | |
575 | $lease = $self->$create_new_lease_ip4($dhcpreq, $network, $lease); | |
576 | } | |
577 | } | |
578 | } | |
579 | } else { | |
580 | my $free = undef; | |
581 | for (; $start <= $end; $start++) { | |
582 | my $nip = $start->addr(); | |
583 | $self->$logger("IP: $nip"); | |
584 | if ($self->{_leases}->{$nip} && ! $free) { | |
585 | $lease = $self->{_leases}->{$nip}; | |
586 | if ($lease->{'binding state'} eq 'free') { | |
587 | $free = (); | |
588 | $free->{$nip} = $lease; | |
589 | } | |
590 | } else { | |
591 | $lease = $self->$create_new_lease_ip4($dhcpreq, $network); | |
592 | $ip = $nip; | |
593 | last; | |
594 | } | |
595 | } | |
596 | if (! $ip && $free) { | |
597 | ($ip, $lease) = each($free); | |
598 | $lease = $self->$create_new_lease_ip4($dhcpreq, $network, $lease); | |
599 | } | |
600 | } | |
601 | ||
602 | return ($ip, $lease); | |
603 | }; | |
604 | ||
605 | if ($req_addr) { | |
606 | if ($self->{_leases}) { | |
607 | $lease = $self->{_leases}->{$req_addr}; | |
608 | return undef if ($lease && $lease->{'hardware ethernet'} ne $self->$get_mac_ip4($dhcpreq)); | |
609 | $lease = $self->$create_new_lease_ip4($dhcpreq, $network, $lease); | |
610 | $ip = $req_addr; | |
611 | } else { | |
612 | ($ip, $lease) = $find_ip_and_lease->($req_addr); | |
613 | } | |
614 | } else { | |
615 | my $mac = $self->$get_mac_ip4($dhcpreq); | |
616 | $self->$logger("MAC: $mac"); | |
617 | if ($self->{_reverse}->{$mac}) { | |
618 | $self->$logger("MAC: $mac IP: " . $self->{_reverse}->{$mac}); | |
619 | $ip = $self->{_reverse}->{$mac}; | |
620 | $lease = $self->{_leases}->{$ip}; | |
621 | $lease = $self->$create_new_lease_ip4($dhcpreq, $network, $lease); | |
622 | } else { | |
623 | ($ip, $lease) = $find_ip_and_lease->($req_addr); | |
624 | } | |
625 | } | |
626 | ||
627 | $self->$logger("IP: $ip lease:\n" . Dumper($lease)); | |
628 | if ($ip && $lease) { | |
629 | $self->$add_lease($ip, $lease); | |
630 | if ($self->{_leases}->{$ip} && $self->{_leases}->{$ip}->{starts} == $lease->{starts}) { | |
631 | $self->{lease_time} = $DEFAULT_LEASE; | |
632 | if ($self->{_config}->{$network}->{ttl}) { | |
633 | $self->{lease_time} = $self->{_config}->{$network}->{ttl}; | |
634 | } | |
635 | $self->{lease_time_renew} = $DEFAULT_LEASE_RENEW; | |
636 | if ($self->{_config}->{$network}->{rttl}) { | |
637 | $self->{lease_time_renew} = $self->{_config}->{$network}->{rttl}; | |
638 | } | |
639 | if ($self->{_config}->{$network}->{netmask}) { | |
640 | $self->{subnet_mask} = $self->{_config}->{$network}->{netmask}; | |
641 | } | |
642 | if ($self->{_config}->{$network}->{router}) { | |
643 | $self->{routers} = $self->{_config}->{$network}->{router}; | |
644 | } | |
645 | if ($self->{_config}->{$network}->{broadcast}) { | |
646 | $self->{broadcast_addr} = $self->{_config}->{$network}->{broadcast}; | |
647 | } | |
648 | if ($self->{_config}->{$network}->{'domain-name'}) { | |
649 | $self->{domain_name} = $self->{_config}->{$network}->{'domain-name'}; | |
650 | } | |
651 | if ($self->{_config}->{$network}->{'dns-servers'}) { | |
652 | $self->{dns_servers} = $self->{_config}->{$network}->{'dns-servers'}; | |
653 | } | |
654 | if ($self->{_config}->{$network}->{'ntp-servers'}) { | |
655 | $self->{ntp_servers} = $self->{_config}->{$network}->{'ntp-servers'}; | |
656 | } | |
657 | } else { | |
658 | $ip = undef; | |
659 | } | |
660 | } | |
661 | ||
662 | return $ip; | |
663 | }; | |
664 | ||
665 | my $calculate_ip_ip4 = sub { | |
666 | my ($self, $dhcpreq) = @_; | |
667 | my ($req_addr, $calc_ip, $network); | |
668 | ||
669 | return undef unless $dhcpreq->chaddr(); | |
670 | $req_addr = $dhcpreq->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); | |
671 | $network = $self->$calculate_net_ip4($dhcpreq); | |
672 | return undef unless $network; | |
673 | ||
674 | if ($self->{_config}->{$network}->{static}) { | |
675 | my @static = $self->{_config}->{$network}->{static}; | |
676 | foreach (@static) { | |
677 | my @mac = split(/\s+/, $_); | |
678 | if ($mac[0] == $self->$get_mac_ip4($dhcpreq)) { | |
679 | $calc_ip = $mac[1]; | |
680 | last; | |
681 | } | |
682 | } | |
683 | } | |
684 | if ($req_addr) { | |
685 | if ($calc_ip && $req_addr != $calc_ip) { | |
686 | $calc_ip = undef; | |
687 | } else { | |
688 | $calc_ip = $self->$renew_lease_ip4($dhcpreq, $network, $req_addr); | |
689 | } | |
690 | } else { | |
691 | $calc_ip = $self->$renew_lease_ip4($dhcpreq, $network); | |
692 | } | |
693 | ||
694 | return $calc_ip; | |
695 | }; | |
696 | ||
697 | my $discover_ip4 = sub { | |
698 | my ($self, $dhcpreq) = @_; | |
699 | my ($res, $dhcpresp, $calc_ip, $req_addr); | |
48b79db9 MR |
700 | |
701 | # calculate address | |
4a195854 | 702 | # $calc_ip = "192.168.9.2"; |
48b79db9 | 703 | |
4a195854 | 704 | $self->$logger("Got request\n".$dhcpreq->toString()); |
48b79db9 MR |
705 | |
706 | $self->{_sock_out_ip4} = IO::Socket::IP->new( | |
707 | Broadcast => 1, | |
708 | PeerPort => 68, | |
709 | PeerAddr => inet_ntoa(INADDR_BROADCAST), | |
710 | Proto => 'udp' | |
711 | ) || do { | |
712 | my $err = $@; | |
4a195854 | 713 | $self->$logger("[discover_ip4] Socket creation error: $err", ERROR); |
48b79db9 MR |
714 | die "[discover_ip4] Socket creation error: $err\n"; |
715 | }; | |
716 | ||
4a195854 | 717 | $res = $self->$read_lease_file();#$self->read_lease_file(); |
48b79db9 | 718 | |
4a195854 MR |
719 | if ($self->{LOG_LEVEL} <= INFO) { |
720 | $req_addr = $dhcpreq->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); | |
721 | if ($req_addr) { | |
722 | $self->$logger("Requested IP: $req_addr", INFO); | |
723 | } else { | |
724 | $self->$logger("Requested IP: None", INFO); | |
725 | } | |
726 | } | |
727 | $calc_ip = $self->$calculate_ip_ip4($dhcpreq); | |
728 | $self->$logger("Offer: $calc_ip"); | |
729 | if ($calc_ip) { | |
730 | $self->$logger("Creating lease for $calc_ip"); | |
731 | $res = $self->$write_lease_file(); | |
732 | } | |
733 | if ($res && $calc_ip) { | |
48b79db9 MR |
734 | $dhcpresp = new Net::DHCP::Packet( |
735 | Comment => $dhcpreq->comment(), | |
736 | Op => BOOTREPLY(), | |
737 | Hops => $dhcpreq->hops(), | |
738 | Xid => $dhcpreq->xid(), | |
739 | Flags => $dhcpreq->flags(), | |
740 | Ciaddr => $dhcpreq->ciaddr(), | |
741 | Yiaddr => $calc_ip, | |
742 | Siaddr => $dhcpreq->siaddr(), | |
743 | Giaddr => $dhcpreq->giaddr(), | |
744 | Chaddr => $dhcpreq->chaddr(), | |
745 | DHO_DHCP_MESSAGE_TYPE() => DHCPOFFER(), | |
746 | DHO_DHCP_SERVER_IDENTIFIER() => $self->{_sock_out_ip4}->sockhost | |
747 | ); | |
4a195854 | 748 | $self->$add_options_ip4($dhcpreq); |
48b79db9 MR |
749 | } else { |
750 | # bad request, we send a NAK | |
751 | $dhcpresp = new Net::DHCP::Packet( | |
752 | Comment => $dhcpreq->comment(), | |
753 | Op => BOOTREPLY(), | |
754 | Hops => $dhcpreq->hops(), | |
755 | Xid => $dhcpreq->xid(), | |
756 | Flags => $dhcpreq->flags(), | |
757 | Ciaddr => $dhcpreq->ciaddr(), | |
758 | Yiaddr => "0.0.0.0", | |
759 | Siaddr => $dhcpreq->siaddr(), | |
760 | Giaddr => $dhcpreq->giaddr(), | |
761 | Chaddr => $dhcpreq->chaddr(), | |
762 | DHO_DHCP_MESSAGE_TYPE() => DHCPNAK(), | |
763 | DHO_DHCP_MESSAGE(), "Bad request...", | |
764 | ); | |
765 | } | |
766 | ||
4a195854 | 767 | $self->$logger("Sending response to " . |
48b79db9 MR |
768 | $self->{_sock_out_ip4}->peerhost . ':' . |
769 | $self->{_sock_out_ip4}->peerport, INFO); | |
770 | ||
771 | # Socket object keeps track of whom sent last packet | |
772 | # so we don't need to specify target address | |
4a195854 MR |
773 | $self->$logger($dhcpresp->toString()); |
774 | $self->$logger("Sending OFFER tr=".$dhcpresp->comment(), INFO); | |
48b79db9 | 775 | $self->{_sock_out_ip4}->send($dhcpresp->serialize()) || die "Error sending OFFER: $!\n"; |
4a195854 | 776 | }; |
48b79db9 | 777 | |
4a195854 | 778 | my $request_ip4 = sub { |
48b79db9 MR |
779 | my ($self, $dhcpreq) = @_; |
780 | my ($calc_ip, $dhcpresp, $peeraddr, $result); | |
781 | ||
4a195854 | 782 | $self->$logger("Got request\n".$dhcpreq->toString()); |
48b79db9 MR |
783 | |
784 | $peeraddr = $dhcpreq->ciaddr() ? $dhcpreq->ciaddr() : inet_ntoa(INADDR_BROADCAST); | |
785 | $self->{_sock_out_ip4} = IO::Socket::IP->new( | |
786 | Broadcast => 1, | |
787 | PeerPort => 68, | |
788 | PeerAddr => $peeraddr, | |
789 | Proto => 'udp', | |
790 | ) || do { | |
791 | my $err = $@; | |
4a195854 | 792 | $self->$logger("[request_ip4] Socket creation error: $err", ERROR); |
48b79db9 MR |
793 | die "[request_ip4] Socket creation error: $err\n"; |
794 | }; | |
795 | ||
4a195854 MR |
796 | my $network = $self->$calculate_net_ip4($dhcpreq); |
797 | if ($network) { | |
798 | my $req_addr = $dhcpreq->getOptionValue(DHO_DHCP_REQUESTED_ADDRESS()); | |
799 | $calc_ip = $self->$renew_lease_ip4($dhcpreq, $network, $req_addr); | |
800 | } | |
801 | ||
48b79db9 | 802 | # compare calculated address with requested address |
4a195854 | 803 | if ($calc_ip) { |
48b79db9 MR |
804 | # address is correct, we send an ACK |
805 | $dhcpresp = new Net::DHCP::Packet( | |
806 | Comment => $dhcpreq->comment(), | |
807 | Op => BOOTREPLY(), | |
808 | Hops => $dhcpreq->hops(), | |
809 | Xid => $dhcpreq->xid(), | |
810 | Flags => $dhcpreq->flags(), | |
811 | Ciaddr => $dhcpreq->ciaddr(), | |
812 | Yiaddr => $calc_ip, | |
813 | Siaddr => $dhcpreq->siaddr(), | |
814 | Giaddr => $dhcpreq->giaddr(), | |
815 | Chaddr => $dhcpreq->chaddr(), | |
816 | DHO_DHCP_MESSAGE_TYPE() => DHCPACK(), | |
817 | DHO_DHCP_SERVER_IDENTIFIER() => $self->{_sock_out_ip4}->sockhost, | |
818 | ); | |
4a195854 | 819 | $self->$add_options_ip4($dhcpreq); |
48b79db9 MR |
820 | $result = 'ACK'; |
821 | } else { | |
822 | # bad request, we send a NAK | |
48b79db9 MR |
823 | $dhcpresp = new Net::DHCP::Packet( |
824 | Comment => $dhcpreq->comment(), | |
825 | Op => BOOTREPLY(), | |
826 | Hops => $dhcpreq->hops(), | |
827 | Xid => $dhcpreq->xid(), | |
828 | Flags => $dhcpreq->flags(), | |
829 | Ciaddr => $dhcpreq->ciaddr(), | |
830 | Yiaddr => "0.0.0.0", | |
831 | Siaddr => $dhcpreq->siaddr(), | |
832 | Giaddr => $dhcpreq->giaddr(), | |
833 | Chaddr => $dhcpreq->chaddr(), | |
834 | DHO_DHCP_MESSAGE_TYPE() => DHCPNAK(), | |
835 | DHO_DHCP_MESSAGE(), "Bad request...", | |
836 | ); | |
837 | $result = 'NAK'; | |
838 | } | |
839 | ||
4a195854 | 840 | $self->$logger("Sending response to " . |
48b79db9 MR |
841 | $self->{_sock_out_ip4}->peerhost . ':' . |
842 | $self->{_sock_out_ip4}->peerport, INFO); | |
843 | ||
844 | # Socket object keeps track of whom sent last packet | |
845 | # so we don't need to specify target address | |
4a195854 MR |
846 | $self->$logger($dhcpresp->toString()); |
847 | $self->$logger("Sending $result tr=".$dhcpresp->comment(), INFO); | |
48b79db9 | 848 | $self->{_sock_out_ip4}->send($dhcpresp->serialize()) || die "Error sending ACK/NAK: $!\n"; |
4a195854 | 849 | }; |
48b79db9 | 850 | |
4a195854 | 851 | my $release_ip4 = sub { |
48b79db9 | 852 | my ($self, $dhcpreq) = @_; |
4a195854 | 853 | my ($ip, $mac); |
48b79db9 | 854 | |
4a195854 MR |
855 | $self->$logger($dhcpreq->toString()); |
856 | $ip = $dhcpreq->ciaddr(); | |
857 | $mac = $self->$get_mac_ip4($dhcpreq); | |
858 | $self->$logger("Release request for IP: $ip MAC: $mac", INFO); | |
48b79db9 | 859 | |
4a195854 MR |
860 | if ($self->{_leases}->{$ip}) { |
861 | my $lease = $self->{_leases}->{$ip}; | |
862 | if ($lease->{'hardware ethernet'} eq $mac) { | |
863 | $lease->{'binding state'} = 'free'; | |
864 | } | |
865 | $self->$write_lease_file(); | |
866 | } | |
867 | }; | |
868 | ||
869 | ######################################################################### | |
870 | # Private methods which handle DHCP6 requests | |
871 | ######################################################################### | |
872 | ||
873 | my $excuse_me_ip6 = sub { | |
48b79db9 MR |
874 | my ($self, $addr, $dhcpreq) = @_; |
875 | ||
4a195854 | 876 | $self->$logger("IPv6 request from [$addr]: $dhcpreq", INFO); |
48b79db9 MR |
877 | $self->{_sock_out_ip6} = IO::Socket::IP->new( |
878 | Domain => PF_INET6, | |
879 | V6Only => 1, | |
880 | Broadcast => 1, | |
881 | PeerPort => 546, | |
882 | PeerAddr => $addr, | |
883 | Proto => 'udp', | |
884 | ) || do { | |
885 | my $err = $@; | |
4a195854 | 886 | $self->$logger("[excuse_me_ip6] Socket creation error: $err", ERROR); |
48b79db9 MR |
887 | die "[excuse_me_ip6] Socket creation error: $err\n"; |
888 | }; | |
4a195854 | 889 | $self->$logger("$addr: Not implemented here", INFO); |
48b79db9 | 890 | $self->{_sock_out_ip6}->send("Not implemented here") || die "Error sending excuse: $!\n"; |
4a195854 MR |
891 | }; |
892 | ||
893 | ######################################################################### | |
894 | # Public methods | |
895 | ######################################################################### | |
896 | ||
897 | # generic signal handler to cause daemon to stop | |
898 | sub signal_handler { | |
899 | $time_to_die = 1; | |
900 | } | |
901 | $SIG{INT} = $SIG{TERM} = $SIG{HUP} = \&signal_handler; | |
902 | ||
903 | # ignore any PIPE signal: standard behaviour is to quit process | |
904 | $SIG{PIPE} = 'IGNORE'; | |
905 | ||
906 | sub new { | |
907 | my ($class, %self) = @_; | |
908 | ||
909 | # OOP stuff | |
910 | $class = ref($class) || $class; | |
911 | my $self = \%self; | |
912 | bless $self, $class; | |
913 | ||
914 | # private | |
915 | $self->{_sock_in_ip4} = undef; | |
916 | $self->{_sock_out_ip4} = undef; | |
917 | $self->{_sock_in_ip6} = undef; | |
918 | $self->{_sock_out_ip6} = undef; | |
919 | $self->{_leases} = undef; | |
920 | $self->{_reverse} = undef; | |
921 | $self->{_config} = undef; | |
922 | $self->{_transaction_ip4} = 0; | |
923 | $self->{_transaction_ip6} = 0; | |
924 | $self->{_dhpcp_ip4} = undef; | |
925 | ||
926 | # public | |
927 | $self->{log_file} ||= 'syslog'; | |
928 | $self->{lease_time} ||= $DEFAULT_LEASE; | |
929 | $self->{lease_time_renew} ||= $DEFAULT_LEASE_RENEW; | |
930 | $self->{subnet_mask} ||= undef; | |
931 | $self->{routers} ||= undef; | |
932 | $self->{broadcast_addr} ||= undef; | |
933 | $self->{domain_name} ||= undef; | |
934 | $self->{dns_servers} ||= undef; | |
935 | $self->{ntp_servers} ||= undef; | |
936 | $self->{LOG_LEVEL} = ERROR unless defined $self->{LOG_LEVEL}; | |
937 | $self->{NODAEMON} ||= 0; | |
938 | $self->{DEBUG} ||= 0; | |
939 | $self->{timeout} ||= 10; | |
940 | $self->{lease_file} ||= '/tmp/dhcpd.leases'; | |
941 | $self->{conf_file} ||= '/tmp/dhcpd.cfg'; | |
942 | ||
943 | return $self; | |
944 | } | |
945 | ||
946 | sub run { | |
947 | my ($self) = @_; | |
948 | my ($sel, @ready, $socket, $res); | |
949 | ||
950 | eval { | |
951 | $self->$read_config(); | |
952 | }; | |
953 | if ($@) { | |
954 | my $err = $@; | |
955 | $self->$logger($err, ERROR); | |
956 | die $err; | |
957 | } | |
958 | $self->$logger("Starting dhcpd", INFO); | |
959 | if ($self->{NODAEMON} < 1) { | |
960 | $self->$logger("Entering Daemon mode"); | |
961 | chdir '/' or die "Can't chdir to /: $!"; | |
962 | umask 0; | |
963 | ||
964 | open STDIN, '/dev/null' or die "Can't read /dev/null: $!"; | |
965 | open STDOUT, '>/dev/null' or die "Can't write to /dev/null: $!"; | |
966 | open STDERR, '>/dev/null' or die "Can't write to /dev/null: $!"; | |
967 | ||
968 | my $pid = fork; | |
969 | exit if $pid; | |
970 | do { | |
971 | my $err = $!; | |
972 | $self->$logger("Couldn't fork: $err", ERROR); | |
973 | die "Couldn't fork: $err"; | |
974 | } unless defined($pid); | |
975 | ||
976 | POSIX::setsid() || do { | |
977 | my $err = $!; | |
978 | $self->$logger("Can't start a new session: $err", ERROR); | |
979 | die "Can't start a new session: $err"; | |
980 | }; | |
981 | $self->$logger("Now in Daemon mode", INFO); | |
982 | } | |
983 | ||
984 | $res = $self->$read_lease_file(); | |
985 | $self->$logger("Starting with empty leases file '$self->{lease_file}'", INFO) | |
986 | if (! $res || ! $self->{_leases}); | |
987 | ||
988 | $self->$logger("Initialization complete", INFO); | |
989 | ||
990 | # open listening socket | |
991 | $self->{_sock_in_ip4} = IO::Socket::IP->new( | |
992 | Domain => PF_INET, | |
993 | LocalPort => 67, | |
994 | LocalAddr => inet_ntoa(INADDR_ANY), | |
995 | Proto => 'udp' | |
996 | ) || do { | |
997 | my $err = $@; | |
998 | $self->$logger("IP4 Socket creation error: $err", ERROR); | |
999 | die "IP4 Socket creation error: $err\n"; | |
1000 | }; | |
1001 | $self->{_sock_in_ip6} = IO::Socket::IP->new( | |
1002 | Domain => PF_INET6, | |
1003 | V6Only => 1, | |
1004 | LocalPort => 547, | |
1005 | LocalAddr => '::', | |
1006 | Proto => 'udp' | |
1007 | ) || do { | |
1008 | my $err = $@; | |
1009 | $self->$logger("IP6 Socket creation error: $err", ERROR); | |
1010 | die "IP6 Socket creation error: $err\n"; | |
1011 | }; | |
1012 | ||
1013 | $sel = IO::Select->new($self->{_sock_in_ip4}); | |
1014 | $sel->add($self->{_sock_in_ip6}); | |
1015 | ||
1016 | until ($time_to_die) { | |
1017 | my $buf = undef; | |
1018 | my $fromaddr; | |
1019 | my $dhcpreq; | |
1020 | ||
1021 | eval { # catch fatal errors | |
1022 | while (@ready = $sel->can_read) { | |
1023 | $self->$logger("Waiting for incoming packet", INFO); | |
1024 | foreach $socket (@ready) { | |
1025 | if ($socket == $self->{_sock_in_ip4}) { | |
1026 | # receive ipv4 packet | |
1027 | $fromaddr = $self->{_sock_in_ip4}->recv($buf, 4096) | |
1028 | || $self->$logger("recv: $!", ERROR); | |
1029 | next if ($!); # continue loop if an error occured | |
1030 | $self->{_transaction_ip4}++; # transaction counter | |
1031 | ||
1032 | { | |
1033 | use bytes; | |
1034 | my ($port,$addr) = unpack_sockaddr_in($fromaddr); | |
1035 | my $ipaddr = inet_ntoa($addr); | |
1036 | $self->$logger("Got a packet tr=$self->{_transaction_ip4} src=$ipaddr:$port length=".length($buf), INFO); | |
1037 | } | |
1038 | ||
1039 | $dhcpreq = new Net::DHCP::Packet($buf); | |
1040 | $dhcpreq->comment($self->{_transaction_ip4}); | |
1041 | ||
1042 | my $messagetype = $dhcpreq->getOptionValue(DHO_DHCP_MESSAGE_TYPE()); | |
1043 | ||
1044 | if ($messagetype eq DHCPDISCOVER()) { | |
1045 | $self->$discover_ip4($dhcpreq); | |
1046 | } elsif ($messagetype eq DHCPREQUEST()) { | |
1047 | $self->$request_ip4($dhcpreq); | |
1048 | } elsif ($messagetype eq DHCPINFORM()) { | |
1049 | $self->$logger("Not implemented: DHCPINFORM", WARNING); | |
1050 | } elsif ($messagetype eq DHCPRELEASE()) { | |
1051 | $self->$release_ip4($dhcpreq); | |
1052 | } else { | |
1053 | $self->$logger("Packet dropped", WARNING); | |
1054 | # bad messagetype, we drop it | |
1055 | } | |
1056 | } else { | |
1057 | # Receive ipv6 packet | |
1058 | my $myaddr = $self->{_sock_in_ip6}->sockhost; | |
1059 | ||
1060 | $fromaddr = $self->{_sock_in_ip6}->recv($buf, 4096) | |
1061 | || $self->$logger("recv: $!", ERROR); | |
1062 | next if ($!); # continue loop if an error occured | |
1063 | $self->{_transaction_ip6}++; # transaction counter | |
1064 | $self->$logger("recv: $buf", INFO); | |
1065 | { | |
1066 | use bytes; | |
1067 | my ($port,$addr) = unpack_sockaddr_in6($fromaddr); | |
1068 | my $ipaddr = inet_ntop(AF_INET6, $addr); | |
1069 | $self->$logger("Got a packet tr=$self->{_transaction_ip6} src=$ipaddr:$port length=".length($buf), INFO); | |
1070 | } | |
1071 | $self->$excuse_me_ip6($myaddr, $buf); | |
1072 | } | |
1073 | } | |
1074 | } | |
1075 | }; # end of 'eval' blocks | |
1076 | if ($@) { | |
1077 | $self->$logger("Caught error in main loop: $@", ERROR); | |
1078 | } | |
1079 | } | |
1080 | $self->{_sock_in_ip4}->close; | |
1081 | $self->{_sock_in_ip6}->close; | |
1082 | $self->$logger("Exiting dhcpd", INFO); | |
48b79db9 MR |
1083 | } |
1084 | ||
1085 | 1; |