1 Internet Systems Consortium DHCP Distribution
9 Version 3 of the ISC DHCP Distribution includes the following features
10 that are new since version 2.0:
12 - DHCP Failover Protocol support
13 - OMAPI, an API for accessing and modifying the DHCP server and
15 - Conditional behaviour
16 - Storing arbitrary information on leases
17 - Address pools with access control
19 - Address allocation restriction by class
20 - Relay agent information option support
22 - Many bug fixes, performance enhancements, and minor new DHCP
25 The main bug fixed here is a bug in the subclass allocation code that
26 could result in a memory smash. Any users of the ISC DHCP server who
27 are using subclasses should seriously consider upgrading to 3.0.1.
29 If you are running 3.0 beta 1 and are doing dynamic DNS updates, the
30 lease file is no longer forward-compatible to 3.0 final. A script
31 has been provided to convert 3.0b1 lease files. This is in
32 contrib/3.0b1-lease-convert.
34 For information on how to install, configure and run this software,
35 as well as how to find documentation and report bugs, please consult
38 The Dynamic DNS Update support is a descendent of an implementation
39 done by Lans Carstensen and Brian Dols at Rose-Hulman Institute of
40 Technology, Jim Watt at Applied Biosystems, Irina Goble at Integrated
41 Measurement Systems, Igor Sharfmesser at Kazakh Telecom, and Brian
42 Murrell at BC Tel Advanced Communications. I'd like to express my
43 thanks to all of these good people here, both for working on the code
44 and for prodding me into improving it.
47 Changes since 3.0 (New Features)
49 - A workaround for certain STSN servers that send a mangled domain-name
50 option was introduced for dhclient. The client will now accept corrupted
51 server responses, if they contain a valid DHCP_MESSAGE_TYPE (OFFER, ACK,
52 or NAK). The server will continue to not accept corrupt client packets.
54 - Support for 'reserved' (static) and BOOTP leases via failover was
57 - Support for adding, removing, and managing class and subclass statements
60 - 'make install' now creates the initial zero-length dhcpd.leases file if
61 one does not already exist on the system.
63 - RFC3942 compliance, site-local option spaces start at 224 now, not 128.
64 ||| THIS NEEDS TO BE SPELLED OUT IN THE NEW FEATURES LIST |||
69 - Null-termination sensing for certain clients that unfortunatley require
70 it in DHCPINFORM processing was repaired.
72 - The host-name option and a few others were moved from "X" format to "t"
73 format to be compatible with new NULL handling functions.
75 - DHCPINFORM processing is a little more careful about return addressing
76 its responses, or if responding via a relay. The INFORM related
77 messages also log the 'effective client ip address' rather than the
78 client's supplied ciaddr (since some clients produce null ciaddrs).
80 - The server was inappropriately sending leases to the RESET state in the
81 event that multiple active leases were found to match a singly-identified
82 client. This was changed to RELEASED (by accepting a different, ACTIVE
83 binding, the client is implicitly releasing its lease). This repairs a
84 bug wherein secondary servers in failover pairs detecting this condition
85 move leases to RESET, and primaries refuse to accept that state
86 transition (properly).
88 - The memset-after-dmalloc() changes made in 3.0.4b1 have been backed out.
92 - Command line parsing in omshell was repaired - it no longer closes
93 STDIN after reading one line.
95 - The resolver library no longer closes the /etc/resolv.conf file
96 descriptor it opened twice.
98 - Changes to trailing NULL removal in 't' option-atoms has been rethought,
99 it now includes 'd' (domain name) types, and tries hard not to rewind an
100 option beyond the start of the text field it is un-terminating.
104 - A DDNS update handling function was misusing the DNS error codes, rather
105 than the internal generic result enumeration. The result is a confusing
106 syslog line, logging the wrong condition.
108 - The DHCP Server was not checking pool balance in the case where it brought
109 a non-ACTIVE lease out of storage for a client that was returning to use
110 a lease it once had long ago, and had since expired.
112 - Failover peers no longer bother to look for free leases to allocate when
113 they already found the client's ACTIVE lease. DISCOVERs are load balanced
114 wether freely-allocated or not, unless the server doubts the peer has
117 - Fixed a bug in dhcrelay agent addition code that suppressed trailing
118 PAD options - it was suppressing only one trailng PAD option, rather
119 than the entire block of them.
121 - Fixed some unlikely overlapping-region memcpy() bugs in dhcrelay agent
122 option addition and stripping code. Added a few sanity checks.
124 - Added some sanity checks to OMAPI connection/authentication code.
126 - dmalloc() memset()'s the non-debug (data) portion of the allocated
127 memory to zero. Code that memset()'s the result returned by dmalloc() to
128 zero is redundant. These redundancies were removed.
130 - Some type declaration corrections to u_int16_t were made in common/tr.c
131 (Token Ring support) thanks to a patch from Jason Vas Dias at RedHat.
133 - A failover bug that was allowing leases that EXPIRED or were RELEASED
134 where tsfp and tstp are identical timestamps to languish in these
135 transitional states has been repaired. As a side effect, lease
136 databases should be kept more consistent overall, not just for these
139 - If the lease db is deleted out from under the daemon, and it moves to rewrite
140 the db, it will go ahead with the operation and move the new db into place
141 once it detects the old db does not exist.
143 - dhclient now ignores IRDA, SIT, and IEEE1394 network interfaces, as it
144 is either nonsensical or (in the case of IEEE1394) is not known to support
145 these interfaces. Thanks to Marius Gedminas and Andrew Pollock of Debian.
147 - Some previously undocumented reasons for dhclient-script invoking has
148 been doucmented in the dhclient-script.8 manpage.
150 - Failover potential expiry calculations (TSTP) have been corrected. Results
151 should be substantially more consistent, and proper given the constraints.
153 - Adjusted lease state validation checks in potential-conflict, to
154 account for possible clock skew similarly to normal state, and several
155 previously illegal transitions were made legal (ex: active->released).
157 - An impossible sanity check was removed from omapi/buffer.c, thanks to a
158 patch from 'infamous42md'.
160 - An OMAPI host/network byte order problem in lease time values has been
163 - Several minor bugs, largely relating to treating 8-byte time values as
164 4-byte entities, have been repaired after careful review of the FreeBSD
165 ports collection's patch set. Thanks to the nameless entities who have
166 contributed to the FreeBSD ports.
168 - When writing a trace file, the file is now created with permissions 0600,
169 to help administrators avoid accidentally publicising sensitive config
172 - The calculation of the maximum size of DHCP packets no longer includes
173 Ethernet framing overhead. The result is that the 'Maximum Message
174 Size' option advertised by clients, or the default value 576, is no
175 longer reduced by 14 bytes, and instead directly reflects the IP level
176 MTU (and the default, minimum allowed IP MTU of 576).
178 - The special status of RELEASED/EXPIRED/RESET leases when a server
179 is operating in partner-down was fixed. It no longer requires a
180 lease be twice the MCLT beyond STOS to 'reallocate', and the expiry
181 event to turn these into FREE leases without peer acknowledgement
182 (after STOS+MCLT) has been repaired.
184 - Compilation on older Solaris systems (lacking /usr/include/sys/int_types.h)
187 - "append"ing a string onto the end of a "t" type option (such as the
188 domain-name field) that had been improperly NULL-terminated by the
189 DHCP server will no longer result in a truncated string containing
190 only the option from the server, and not the expected appended value.
191 Thanks to a patch from Jason Vas Dias at RedHat.
193 - File handlers on configuration state (config files and lease dbs) should
194 be treated consistently, regardless of wether TRACING is defined or not.
196 - The linux build environment has had some minor improvements - better
197 sensing of 64-bit pointer sizes (only used for establishing an icmp_id),
198 and corrections to #if operators regarding LINUX_MAJOR should it ever
201 - The server now tries harder to survive the condition where it is unable
202 to open a new lease file to rewrite the lease state database.
204 Changes since 3.0.3b3
206 - dhclient.conf documentation for interface {} was updated to reflect recent
207 discussion on the dhcp-hackers mailing list.
209 - In response to reports that the software does not compile on GCC 4.0.0,
210 -Werror was removed from Makefile.conf for all platforms that used it.
211 We will address the true problem in a future release; this is a temporary
214 Changes since 3.0.3b2
216 - An error in code changes introduced in 3.0.3b2 was corrected, which caused
217 static BOOTP clients to receive random addresses.
219 Changes since 3.0.3b1
221 - A bug was fixed in BOOTPREQUEST handling code wherein stale references to
222 host records would be left behind on leases that were not allocated to the
223 client currently booting (eg in the case where the host was denied booting).
225 - The dhcpd.conf.5 manpage was updated to be more clear in regards to
226 multiple host declarations (thanks to Vincent McIntyre). 'Interim' style
227 dynamic updates were also retouched.
231 - A bug was fixed where a server might load balance a DHCP REQUEST to its
232 peer after already choosing not to load balance the preceeding DISCOVER.
233 The peer cannot allocate the originating server's lease.
235 - In the case where a secondary server lost its stable storage while the
236 primary was still in communications-interrupted, and came back online,
237 the lease databases would not be fully transferred to the secondary.
238 This was due to the secondary errantly sending an extra UPDREQ message
239 when the primary made its state transition to PARTNER-DOWN known.
241 - The package will now compile cleanly in gcc 3.3 and 3.4. As a side effect,
242 lease structures will be 9 bytes smaller on all platforms. Thanks to
243 Jason Vas Dias at Redhat.
245 - Interface discovery code in DISCOVER_UNCONFIGURED mode is now
246 properly restricted to only detecting broadcast interfaces. Thanks
247 to a patch from Jason Vas Dias at RedHat.
249 - decode_udp_ip_header was changed so that the IP address was copied out
250 to a variable, rather than referenced by a pointer. This enforces 4-byte
251 alignment of the 32-bit IP address value. Thanks to a patch from Dr.
254 - An incorrect log message was corrected thanks to a patch from
257 - A bug in DDNS was repaired, where if the server's first DDNS action was
258 a DDNS removal rather than a DDNS update, the resolver library's
259 retransmit timer and retry timer was set to the default, implying a
260 15 second timeout interval. Which is a little excessive in a synchronous,
261 single-threaded system. In all cases, ISC DHCP should now hold fast to
262 a 1-second timeout, trying only once.
264 - The siaddr field was being improperly set to the server-identifier when
265 responding to DHCP messages. RFC2131 clarified the siaddr field as
266 meaning the 'next server in the bootstrap process', eg a tftp server.
267 The siaddr field is now left zeroed unless next-server is configured.
269 - mockup_lease() could have returned in an error condition (or in the
270 condition where no fixed-address was found matching the shared
271 network) with stale references to a host record. This is probably not
272 a memory leak since host records generally never die anyway.
274 - A bug was repaired where failover servers would let stale client identifiers
275 persist on leases that were reallocated to new clients not sending an id.
277 - Binding scopes ("set var = value;") are now removed from leases allocated
278 by failover peers if the lease had expired. This should help reduce the
279 number of stale binding scopes on leases.
281 - A small memory leak was closed involving client identifiers larger than
282 7 bytes, and failover.
284 - Configuring a subnet in dhcpd.conf with a subnet mask of 32 bits might
285 cause an internal function to overflow heap. Thanks to Jason Vas Dias
288 - Some inconsistencies in treating numbers that the lexer parsed as 'NUMBER'
289 or 'NUMBER_OR_NAME' was repaired. Hexadecimal parsing is affected, and
292 - In several cases, parse warnings were being issued before the lexical
293 token had been advanced to the token whose value was causing an error...
294 causing parse warnings to claim the problem is on the wrong token.
296 - Host declarations matching on client identifier for dynamic leases will
297 no longer match fixed-address host declarations (this is now identical
298 to behaviour for host records matching on hardware address).
300 Changes since 3.0.2rc3
302 - A previously undocumented configuration directive, 'local-address',
303 was documented in the dhcpd.conf manpage.
305 Changes since 3.0.2rc2
307 - Two varaibles introduced in 3.0.2b1 were used without being initialized
308 in the case where neither the FILE nor SNAME fields were available for
309 overloading. This was repaired.
311 - A heretofore believed to be impossible corner case of the option
312 overloading implementation turned out to be possible ("Unable to sort
313 overloaded options after 10 tries."). The implementation was reworked
314 to consider the case of an option so large it would require more than
317 - Many other instances of variables being used without being initialized
320 - An uninitialized variable in omapi_io_destroy() led to the discovery
321 that this function may result in orphaned pointers (and hence, a memory
324 Changes since 3.0.2rc1
326 - allocate_lease() was rewritten to repair a bug in which the server would
327 try to allocate an ABANDONED lease when FREE leases were available.
329 Changes since 3.0.2b1
331 - Some dhcp-eval.5 manpage formatting was repaired.
335 - A bug was fixed in the server's 'option overloading' implementation,
336 where options loaded into the 'file' and 'sname' packet fields were
337 not aligned precisely as rfc2131 dictates.
339 - The FreeBSD client script was changed to support the case where a domain
340 name was not provided by the server.
342 - A memory leak in 'omshell' per each command line parsed was
343 repaired, thanks to a patch from Jarkko Torppa.
345 - Log functions writing to stderr were adjusted to use the STDERR_FILENO
346 system definition rather than '2'. This is a no-op for 90% of platforms.
348 - One call to trace_write_packet_iov() counted the number of io vectors
349 incorrectly, causing inconsistent tracefiles. This was fixed.
351 - Some expression parse failure memory leaks were closed.
353 - A host byte order problem in tracefiles was repaired.
355 - Pools configured in DHCPD for failover possessing permission lists that
356 previously were assumed to not include dyanmic bootp clients are now
357 a little more pessimistic. The result is, dhcpd will nag you about just
358 about most pools that possess a 'allow' statement with no 'deny' that
359 would definitely match a dynamic bootp client.
361 - The 'ddns-update-style' configuration warning bit now insists that
362 the configuration be globally scoped.
364 - Two memory leaks in dhclient were closed thanks to a patch from Felix
367 - Some minor but excellently pedantic documentation errors were fixed
368 thanks to a patch from Thomas Klausner.
370 - Bugs in operator precedence in executable statements have been repaired
371 once again. More legal syntaxes should be parsed legally.
373 - Failing to initialize a tracefile for any reason if a tracefile was
374 specified is now a fatal error. Thanks to a patch from Albert Herranz.
376 - Corrected a bug in which the number of leases transferred as calculated
377 by the failover primary and sent to peers in POOLRESP responses may be
378 incorrect. This value is not believed to be used by other failover
379 implementations, excepting perhaps as logged information.
381 - Corrected a bug in which 'dhcp_failover_send_poolresp()' was in fact
382 sending POOLREQ messages instead of POOLRESP mesasges. This message
383 was essentially ignored since failover secondaries effectively do not
384 respond to POOLREQ messages.
386 - Type definitions for various bitwidths of integers in the sunos5-5
387 build of ISC DHCP have been fixed. It should compile and run more
388 easily when built in 64-bit for this platform.
390 - "allow known-clients;" is now a legal syntax, to avoid confusion.
392 - If one dhcp server chooses to 'load balance' a request to its failover
393 peer, it first checks to see if it believes said peer has a free
394 lease to allocate before ignoring the DISCOVER.
396 - log() was logging a work buffer, rather than the value returned by
397 executing the statements configured by the user. In some cases,
398 the work buffer and the intended results were the same. In some other
399 cases, they were not. This was fixed thanks to a patch from Gunnar
400 Fjone and directconnect.no.
402 - Compiler warnings for some string type conversions was fixed, thanks
403 to Andreas Gustafsson.
405 - The netbsd build environments were simplified to one, in which
406 -Wconversion is not used, thanks to Andreas Gustafsson.
408 - How randomness in the backoff-cutoff dhclient configuration variable
409 is implemented was better documented in the manpage, and the behaviour
410 of dhclient in REQUEST timeout handling was changed to match that of
411 DISCOVER timeout handling.
413 - Omapi was hardened against clients that pass in null values, thanks
414 to a patch from Mark Jason Dominus.
416 - A bug was fixed in dhclient that kept it from doing client-side
417 ddns updates. Thanks to a patch from Andreas Gustafsson, which
418 underwent some modification after review by Jason Vas Dias.
420 - Failover implementations disconnected due to the network between
421 them (rather than one of the two shutting down) will now try to
422 re-establish the failover connection every 5 seconds, rather than
423 to simply try once and give up until one of them is restarted.
424 Thanks to a patch from Ulf Ekberg from Infoblox, and field testing
425 by Greger V. Teigre which led to an enhancement to it.
427 - A problem that kept DHCP Failover secondaries from tearing down
428 ddns records was repaired. Thanks to a patch from Ulf Ekberg from
431 - 64bit pointer sizes are detected properly on FreeBSD now.
433 - A bug was repaired where the DHCP server would leave stale references
434 to host records on leases it once thought about offering to certain
435 clients. The result would be to apply host and 'known' scopes to the
436 wrong clients (possibly denying booting). NOTE: The 'mis-host' patch
437 that was being circulated as a workaround is not the way this bug was
438 fixed. If you were a victim of this bug in 3.0.1, you are cautioned
439 to proceed carefully and see if it fixes your problem.
441 - A bug was repaired in the server's DHCPINFORM handling, where it
442 tried to divine the client's address from the source packet and
443 would get it wrong. Thanks to Anshuman Singh Rawat.
445 - A log message was introduced to help illuminate the case where the
446 server was unable to find a lease to assign to any BOOTP client.
447 Thanks to Daniel Baker.
449 - A minor dhcpd.conf.5 manpage error was fixed.
451 Changes since 3.0.1rc14
453 - The global variable 'cur_time' was centralized and is now uniformly of a
454 type #defined in system-dependent headers. It had previously been defined
455 in one of many places as a 32-bit value, and this causes mayhem on 64-bit
456 big endian systems. It probably wasn't too healthy on little endian
459 - A printf format string error introduced in rc14 was repaired.
461 - AIX system-dependent header file was altered to only define NO_SNPRINTF
462 if the condition used to #ifdef in vsnprintf in AIX' header files
465 - The Alpha/OSF system-dependent header file was altered to define
466 NO_SNPRINTF on OS revisions older than 4.0G.
468 - omapip/test.c had string.h added to its includes.
470 Changes since 3.0.1rc13
472 ! CAN-2004-0460 - CERT VU#317350: Five stack overflow exploits were closed
473 in logging messages with excessively long hostnames provided by the
474 clients. It is highly probable that these could have been used by
475 attackers to gain arbitrary root access on systems using ISC DHCP 3.0.1
476 release candidates 12 or 13. Special thanks to Gregory Duchemin for
477 both finding and solving the problem.
479 ! CAN-2004-0461 - CERT VU#654390: Once the above was closed, an opening
480 in log_*() functions was evidented, on some specific platforms where
481 vsnprintf() was not believed to be available and calls were wrapped to
482 sprintf() instead. Again, credit goes to Gregory Duchemin for finding
483 the problem. Calls to snprintf() are now linked to a distribution-local
484 snprintf implementation, only in those cases where the architecture is
485 not known to provide one (see includes/cf/[arch].h). If you experience
486 linking problems with snprintf/vsnprintf or 'isc_print_' functions, this
487 is where to look. This vulnerability did not exist in any previously
488 published version of ISC DHCP.
490 - Compilation on hpux 11.11 was repaired.
492 - 'The cross-compile bug fix' was backed out.
494 Changes since 3.0.1rc12
496 - Fixed a bug in omapi lease lookup function, to form the hardware
497 address for the hash lookup correctly, thanks to a patch from
500 - Fixed a bug where dhcrelay was sending relayed responses back to the
501 broadcast address, but with the source's unicast mac address. Should
502 now conform to rfc2131 section 4.1.
504 - Cross-compile bug fix; use $(AR) instead of ar. Thanks to Morten Brorup.
506 - Fixed a crash bug in dhclient where dhcpd servers that do not provide
507 renewal times results in an FPE. As a side effect, dhclient can now
508 properly handle 0xFFFFFFFF (-1) expiry times supplied by servers. Thanks
509 to a patch from Burt Silverman.
511 - The 'ping timeout' debugs from rc12 were removed to -DDEBUG only,
512 and reformatted to correct a compilation error on solaris platforms.
514 - A patch was applied which fixes a case where leases read from the
515 leases database do not properly over-ride previously read leases.
517 - dhcpctl.3 manpage was tweaked.
519 Changes since 3.0.1rc11
521 - A patch from Steve Campbell was applied with minor modifications to
522 permit reverse dns PTR record updates with values containing spaces.
524 - A patch from Florian Lohoff was applied with some modifications to
525 dhcrelay. It now discards packets whose hop count exceeds 10 by default,
526 and a command-line option (-c) can be used to set this threshold.
528 - A failover bug relating to identifying peers by name length instead of
531 - Delcaring failover configs within shared-network statements should no
532 longer result in error.
534 - The -nw command line option to dhclient now works.
536 - Thanks to a patch from Michael Richardson:
537 - Some problems with long option processing have been fixed.
538 - Some fixes to minires so that updates of KEY records will work.
540 - contrib/ms2isc was updated by Shu-Min Chang of the Intel Corporation.
541 see contrib/ms2isc/readme.txt for revision notes.
543 - Dhclient no longer uses shell commands to kill another instance of
544 itself, it sends the signal directly. Thanks to a patch from Martin
547 - The FreeBSD dhclient-script was changed so that a failure to write to
548 /etc/resolv.conf does not prematurely end the script. This keeps dhclient
549 from looping infinitely when this is the case. Thanks to a patch from
552 - A patch from Bill Stephens was applied which resolves a problem with lease
553 expiry times in failover configurations.
555 - A memory leak in configuration parsing was closed thanks to a patch from
558 - The function which discovers interfaces will now skip non-broadcast or
559 point-to-point interfaces, thanks to a patch from David Brownlee.
561 - Options not yet known by the dhcpd or dhclient have had their names
562 changed such that they do not contain # symbols, in case they should ever
563 appear in a lease file. An option that might have been named "#144" is
566 - Another patch from Bill Stephens which allows the ping-check timeout to
567 be configured as 'ping-timeout'. Defaults to 1.
569 Changes since 3.0.1rc10
571 - Potential buffer overflows in minires repaired.
573 - A change to the linux client script to use /bin/bash, since /bin/sh may
576 - Some missing va_end cleanups thanks to a patch from Thomas Klausner.
578 - A correction of boolean parsing syntax validation - some illegal syntaxes
579 that worked before are now detected and produce errs, some legal syntaxes
580 that errored before will now work properly.
582 - Some search-and-replace errors that caused some options to change their
585 - Shu-min Chang of the Intel corporation has contributed a perl script and
586 module that converts the MS NT4 DHCP configuration to a ISC DHCP3
589 - Applied the remainder of the dhcpctl memory leak patch provided by Bill
590 Squier at ReefEdge, Inc. (groo@reefedge.com).
592 - Missing non-optional failover peer configurations will now result in a soft
593 error rather than a null dereference.
595 Changes since 3.0.1rc9
597 - A format string was corrected to fix compiler warnings.
599 - A number of spelling corrections were made in the man pages.
601 - The dhclient.conf.5 man page was changed to refer to do-forward-updates
602 rather than a configuration option that doesn't exist.
604 - A FreeBSD-specific bug in the interface removal handling was fixed.
606 - A Linux-specific Token Ring detection problem was fixed.
608 - Hashes removed from as-yet-unknown agent options, having those options
609 appear in reality before we know about them will no longer produce
610 self-corrupting lease databases.
612 - dhclient will use the proper port numbers now when using the -g option.
614 - A order-of-operations bug with 2 match clauses in 1 class statement is
615 fixed thanks to a patch from Andrew Matheson.
617 - Compilation problems on Solaris were fixed.
619 - Compilation problems when built with DEBUG or DEBUG_PACKET were repaired.
621 - A fix to the dhcp ack process which makes certain group options will be
622 included in the first DHCPOFFER message was made thanks to a patch from
625 - A few memory leaks were repaired thanks to patches from Bill Squier at
626 ReefEdge, Inc. (groo@reefedge.com).
628 - A fix for shared-networks that sometimes give clients options for the
629 wrong subnets (in particular, 'option routers') was applied, thanks to
630 Ted Lemon for the patch.
632 - Omshell's handling of dotted octets as values was changed such that dots
633 one after the other produce zero values in the integer string.
635 Changes since 3.0.1rc8
637 - Fix a format string vulnerability in the server that could lead to a
638 remote root compromise (discovered by NGSEC Research Team, www.ngsec.com).
640 - Add additional support for NetBSD/sparc64.
642 - Fix a bug in the command-line parsing of the client. Also, resolve
645 - Add better support for shells other than bash in the Linux client
648 - Various build fixes for modern versions of FreeBSD and Linux.
650 - Fix a bad bounds check when printing binding state names.
652 - Clarify documentation about fixed-address and multiple addresses.
654 - Fix a typo in the authoritative error message.
656 - Make a log entry when we can't write a billing class.
658 - Use conversion targets that are the right size on all architectures.
660 - Increment the hop count when relaying.
662 - Log a message when lease state is changed through OMAPI.
664 - Don't rerun the shared_network when evaluating the pool.
666 - Fix a reversed test in the parser.
668 - Change the type of rbuf_max.
670 - Make FTS_LAST a manifest constant to quiet warnings.
672 Changes since 3.0.1rc7
674 - Fix two compiler warnings that are generated when compiling on Solaris
675 with gcc. These stop the build, even though they weren't actually
676 errors, because we prefer that our builds generate no warnings.
678 Changes since 3.0.1rc6
680 - Don't allow a lease that's in the EXPIRED, RELEASED or RESET state
683 - Implement lease stealing for cases where the primary has fewer leases
684 than the secondary, as called for by the standard.
686 - Add a fudge factor to the lease expiry acceptance code, (suggested
687 by Kevin Miller of CMU).
689 - Fix a bug in permit_list_match that made it much too willing to say
690 that two permit lists matched.
692 - Unless DEBUG_DNS_UPDATES is defined, print more user-friendly (and
693 also more compact) messages about DNS updates.
695 - Fix a bug in generating wire-format domain names for the FQDN option.
697 - Fix a bug where the FQDN option would not be returned if the client
698 requested it, contrary to the standard.
700 - On Darwin, use the FreeBSD DHCP client script.
702 - On NetBSD/sparc, don't check for casting warnings.
704 - Add a flag in the DHCP client to disable updating the client's A
705 record when sending an FQDN option indicating that the client is
706 going to update its A record.
708 - In the client, don't attempt a DNS update until one second after
709 configuring the new IP address, and if the update times out, keep
710 trying until a response, positive or negative, is received from the
713 - Fix an uninitialized memory bug in the DHCP client.
715 - Apply some FreeBSD-specific bug fixes suggested by Murray Stokely.
717 - Fix a bug in ns_parserr(), where it was returning the wrong sort
718 of result code in some cases (suggested by Ben Harris of the
721 - Fix a bug in is_identifier(), where it was checking against EOF
722 instead of the END_OF_FILE token (also suggested by Ben Harris).
724 - Fix a bug where if an option universe contained no options, the
725 DHCP server could dump core (Walter Steiner).
727 - Fix a bug in the handling of encapsulated options.
729 - Fix a bug that prevented NWIP suboptions from being processed.
731 - Delete the FTS_BOOTP and FTS_RESERVED states and implement them
732 as modifier flags to the FTS_ACTIVE state, as called for in the
733 failover protocol standard.
735 - Fix bugs in the pool merging code that resulted in references and
736 dereferences of null pointers. This bug had no impact unless the
737 POINTER_DEBUG flag was defined.
739 - In the server, added a do-forward-updates flag that can be used to
740 disable forward updates in all cases, so that sites that want the
741 clients to take sole responsibility for updating their A record can
744 - Make it possible to disable optimization of PTR record updates.
746 Changes since 3.0.1rc5
748 - Include some new documentation and changes provided by Karl Auer.
750 - Add a workaround for some Lexmark printers that send a double-NUL-
751 terminated host-name option, which would break DNS updates.
753 - Fix an off-by-one error in the MAC-address checking code for
754 DHCPRELEASE that was added in 3.0.1rc5.
756 - Fix a bug where client-specific information was not being discarded
757 from the lease when it expired or was released, resulting in
758 problems if the lease was reallocated to a different client.
760 - If more than one allocation pool is specified that has the same set
761 of constraints as another allocation pool on the same shared
762 network, merge the two pools.
764 - Don't print an error in fallback_discard, since this just causes
765 confusion and does not appear to be helping to encourage anyone to
768 Changes since 3.0.1rc4
770 - Fix a bug that would cause the DHCP server to spin if asked to parse
771 a certain kind of incorrect statement.
773 - Fix a related bug that would prevent an error from being reported in
776 - Additional documentation.
778 - Make sure that the hardware address matches the lease when
779 processing a DHCPRELEASE message.
781 Changes since 3.0.1rc3
783 - A minor bug fix in the arguments to a logging function call.
784 - Documentation update for dhcpd.conf.
786 Changes since 3.0.1rc2
788 - Allow the primary to send a POOLREQ message. This isn't what the current
789 failover draft says to do, so we may have to back it out if I can't get the
790 authors to relent, but the scheme for balancing that's specified in the
791 current draft seems needlessly hairy, so I'm floating a trial balloon.
792 The rc1 code did not implement the method described in the draft either.
794 Changes since 3.0.1rc1
796 - Treat NXDOMAIN and NXRRSET as success when we are trying to delete a
797 domain or RRSET. This allows the DHCP server to forget about a name
798 it added to the DNS once it's been removed, even if the DHCP server
799 wasn't the one that removed it.
801 - Install defaults for failover maximum outstanding updates and maximum
802 silent time. This prevents problems that might occur if these values
805 - Don't do DDNS deletes if ddns-update-style is none.
807 - Return relay agent information options in DHCPNAK. This prevents DHCPNAK
808 messages from being dropped when the relay agent information option contains
811 - Fix a problem where coming up in recover wouldn't result in an update
814 - Add some more chatty messages when we start a recovery update and when it's
817 - Fix a possible problem where some state might have been left around
818 after the peer lost contact and regained contact about how many updates
821 - Don't nix a lease update because of a lease conflict. This test has
822 never (as far as I know) prevented a mistake, and it appears to cause
823 problems with failover.
825 - Add support in rc history code for keeping a selective history, rather
826 than a history of all references and dereferences. This code is only used
827 when extensive additional debugging is enabled.
831 - Make allocators for hash tables. As a side effect, this fixes a memory
832 smash in the subclass allocation code.
834 - Fix a small bug in omshell where if you try to close an object when
835 no object is open, it dumps core.
837 - Fix an obscure coredump that could occur on shutdown.
839 - Fix a bug in the recording of host declaration rubouts in the lease file.
841 - Fix two potential spins in the host deletion code.
843 - Fix a core dump that would happen if an application tried to update
844 a host object attribute with a null value.
846 Changes since 3.0 Release Candidate 12
848 - Fix a memory leak in the evaluation code.
850 - Fix an obscure core dump.
852 - Print a couple of new warnings when parsing the configuration file
853 when crucial information is left out.
855 - Log "no free leases" as an error.
857 - Documentation updates.
859 Changes since 3.0 Release Candidate 11
861 - Always return a subnet selection option if one is sent.
863 - Fix a warning that was being printed because an automatic data
864 structure wasn't zeroed.
866 - Fix some failover state transitions that were being handled
869 - When supersede_lease is called on a lease whose end time has already
870 expired, but for which a state transition has not yet been done, do
871 a state transition. This fixes the case where if the secondary
872 allocated a lease to a client and the lease "expired" while the
873 secondary was in partner-down, no expiry event would actually
874 happen, so the lease would remain active until the primary was
877 Changes since 3.0 Release Candidate 10
879 - Fix a bug that was preventing released leases from changing state
880 in failover-enabled pools.
882 - Fix a core dump in the client identifier finder code (for host
885 - Finish fixing a bug where bogus data would sometimes get logged to
886 the dhclient.leases file because it was opened as descriptor 2.
888 - Fix the Linux dhclient-script according to suggestions made by
889 several people on the dhcp-client mailing list.
891 - Log successful DNS updates at LOG_INFO, not LOG_ERROR.
893 - Print an error message and refuse to run if a failover peer is
894 defined but not referenced by any pools.
896 - Correct a confusing error message in failover.
898 Changes since 3.0 Release Candidate 9
900 - Fix a bug in lease allocation for Dynamic BOOTP clients.
902 Changes since 3.0 Release Candidate 8 Patchlevel 2
904 - Fix a bug that prevented update-static-leases from working.
906 - Document failover-state OMAPI object.
908 - Fix a compilation error on SunOS 4.
910 Changes since 3.0 Release Candidate 8 Patchlevel 1
912 - Fix a parsing bug that broke dns updates (both interim and ad-hoc).
913 This was introduced in rc8pl1 as an unintended result of the memory
914 leakage fixes that were in pl1.
916 - Fix a long-standing bug where the server would record that an update
917 had been done for a client with no name, even though no update had
918 been done, and then when the client's lease expired the deletion of
919 that nonexistant record would time out because the name was the null
922 - Clean up the omshell, dhcpctl and omapi man pages a bit.
924 Changes since 3.0 Release Candidate 8
926 - Fix a bug that could cause the DHCP server to spin if
927 one-lease-per-client was enabled.
929 - Fix a bug that was causing core dumps on BSD/os in the presence of
932 - In partner-down state, don't restrict lease lengths to MCLT.
934 - On the failover secondary, record the MCLT received from the primary
935 so that if we come up without a connection to the primary we don't
936 wind up giving out zero-length leases.
938 - Fix some compilation problems on BSD/os.
940 - Fix a bunch of memory leaks.
942 - Fix a couple of bugs in the option printer.
944 - Fix an obscure error reporting bug in the dns update code, and also
945 make the message clearer when a key algorithm isn't supported.
947 - Fix a bug in the tracing code that prevented trace runs that used
948 tcp connections from being played back.
950 - Add some additional debugging capability for catching memory leaks
953 - Make the client release the lease correctly on shutdown.
955 - Add some configurability to the build system.
957 - Install omshell manual page in man1, not man8.
959 - Craig Gwydir sent in a patch that fixes a long-standing bug in the
960 DHCP client that could cause core dumps, but that for some reason
961 hadn't been noticed until now.
963 Changes since 3.0 Release Candidate 7
965 - Fix a bug in failover where we weren't sending updates after a
966 transition from communications-interrupted to normal.
968 - Handle expired/released/reset -> free transition according to the
969 protocol specification (this works - the other way not only wasn't
970 conformant, but also didn't work).
972 - Add a control object in both client and server that allows either
973 daemon to be shut down cleanly.
975 - When writing a lease, if we run out of disk space, shut down the
976 output file and insist on writing a new one before proceeding.
978 - In the server, if the OMAPI listener port is occupied, keep trying
979 to get it, rather than simply giving up and exiting.
981 - Support fetching variables from leases and also updating and adding
982 variables to leases via OMAPI.
984 - If two failover peers have wildly different clocks, refuse to start
987 - Fix a bug in the DNS update code that could cause core dumps when
988 running on alpha processors.
990 - Fixed a bug in ddns updates for static lease entries, thanks to a
991 patch from Andrey M Linkevitch.
993 - Add support for Darwin/MacOS X
995 - Install omshell (including new documentation).
997 - Support DNS updates in the client (this is a very obscure feature
998 that most DHCP client users probably will not be able to use).
1000 - Somewhat cleaner status logging in the client.
1002 - Make OMAPI key naming syntax compatible with the way keys are
1003 actually named (key names are domain names).
1005 - Fix a bug in the lease file writer.
1007 - Install DHCP ISC headers in a different place than BIND 9 ISC
1008 headers, to avoid causing trouble in BIND 9 builds.
1010 - Don't send updates for attributes on an object when the attributes
1011 haven't changed. Support deleting attributes on remote objects.
1013 - Fix a number of bugs in omshell, and add the unset and refresh
1016 - Handle disconnects in OMAPI a little bit more intelligently (so that
1017 the caller gets ECONNRESET instead of EINVAL).
1019 - Fix a bunch of bugs in the handling of clients that have existing
1020 leases when the try to renew their leases while failover is
1023 Changes since 3.0 Release Candidate 6
1025 - Fix a core dump that could happen when processing a DHCPREQUEST from
1026 a client that had a host declaration that contained both a
1027 fixed-address declaration and a dhcp-client-identifier option
1028 declaration, if the client identifier was longer than nine bytes.
1030 - Fix a memory leak that could happen in certain obscure cases when
1031 using omapi to manipulate leases.
1033 - Fix some bugs and omissions in omshell.
1036 Changes since 3.0 Release Candidate 5
1038 - Fix a bug in omapi_object_dereference that prevented objects in
1039 chains from having their reference counts decreased on dereference.
1041 - Fix a bug in omapi_object_dereference that would prevent object
1042 chains from being freed upon removal of the last reference external
1045 - Fix a number of other memory leaks in the OMAPI protocol subsystem.
1047 - Add code in the OMAPI protocol handler to trace memory leakage.
1049 - Clean up the memory allocation/reference history printer.
1051 - Support input of dotted quads and colon-separated hex lists as
1052 attribute values in omshell.
1054 - Fix a typo in the Linux interface discovery code.
1056 - Conditionalize a piece of trace code that wasn't conditional.
1058 Changes since 3.0 Release Candidate 4
1060 - Fix a bug that would prevent leases from being abandoned properly on
1063 - Fix failover peer OMAPI support.
1065 - In failover, correctly handle expiration of leases. Previously,
1066 leases would never be reclaimed because they couldn't make the
1067 transition from EXPIRED to FREE.
1069 - Fix some broken failover state transitions.
1071 - Documentation fixes.
1073 - Take out an unnecessary check in DHCP relay agent information option
1074 stashing code that was preventing REBINDING clients from rebinding.
1076 - Prevent failover peers from allocating leases in DHCPREQUEST
1077 processing if the lease belongs to the other server.
1079 - Record server version in lease file introductory comment.
1081 - Correctly report connection errors in OMAPI and failover.
1083 - Make authentication signature algorithm name comparisons in OMAPI
1086 - Fix compile problem on SunOS 4.x
1088 - If a signature algorithm is not terminated with '.', terminate it so
1089 that comparisons between fully-qualified names will work
1092 - Different SIOCGIFCONF probe code, may "fix" problem on some Linux
1093 systems with the probe not working correctly.
1095 - Don't allow user to type omapi key on command line of omshell.
1097 Changes since 3.0 Release Candidate 3
1099 - Do lease billing on startup in a way that I *think* will finally do
1100 the billing correctly - the previous method could overbill as a
1101 result of duplicate leases.
1103 - Document OMAPI server objects.
1105 Changes since 3.0 Release Candidate 2 Patchlevel 1
1107 - Fix some problems in the DDNS update code. Thanks to Albert
1108 Herranz for figuring out the main problem.
1110 - Fix some reference counting errors on host entries that were causing
1113 - Fix a byte-swap bug in the token ring code, thanks to Jochen
1116 - Fix a bug in lease billing, thanks to Jonas Bulow.
1118 Changes since 3.0 Release Candidate 2
1120 - Change the conditions under which a DHCPRELEASE is actually
1121 committed to be consistent with lease binding states rather than
1122 using the lease end time. This may fix some problems with the
1125 - Fix a bug where lease updates would fail on Digital Unix (and maybe
1126 others) because malloc was called with a size of zero.
1128 - Fix a core dump that happens when the DHCP server can't create its
1131 Changes since 3.0 Release Candidate 1 Patchlevel 1
1133 - Fix the dhcp_failover_put_message to not attempt to allocate a
1134 zero-length buffer. Some versions of malloc() fail if you try to
1135 allocate a zero-length buffer, and this was causing problems on,
1138 - Fix a case where the failover code was printing an error message
1139 when no error had occurred.
1141 - Fix a problem where when a server went down and back up again, the
1142 peer would not see a state transition and so would stay in the
1143 non-communicating state.
1145 - Be smart about going into recover_wait.
1147 - Fix a problem in the failover implementation where peers would fail
1148 to come into sync if interrupted in the RECOVER state. This could
1149 have been the cause of some problems people have reported recently.
1151 - Fix a problem with billing classes where they would not be unbilled
1152 when the client lease expired.
1154 - If select fails, figure out which descriptor is bad, and cut it out
1155 of the I/O loop. This prevents a potentially nasty spin. I
1156 haven't heard any report it in a while, but it came up consistently
1159 - Fix a bug in the relay agent where if you specified interfaces on
1160 the command line, it would fail.
1162 - Fix a couple of small bugs in the omapi connection object (no known
1165 - Add the missing 3.0 Beta 1 lease conversion script.
1167 - Read dhcp client script hooks if they exist, rather than only if
1170 Changes since 3.0 Release Candidate 1
1172 - Fix a memory smash that happens when fixed-address leases are used.
1173 ANY SITE AT WHICH FIXED-ADDRESS STATEMENTS ARE BEING USED SHOULD
1174 UPGRADE IMMEDIATELY. This has been a long-standing bug - thanks to
1175 Alvise Nobile for discovering it and helping me to find it!
1177 - Fix a small bug in binary-to-ascii, thanks to H. Peter Anvin of
1180 - There is a known problem with the DHCP server doing failover on
1181 Compaq Alpha systems. This patchlevel is not a release candidate
1182 because of this bug. The bug should be straightforward to fix, so
1183 a new release candidate is expected shortly.
1185 - There is a known problem in the DDNS update code that is probably a
1186 bug, and is not, as far as we know, fixed in this patchlevel.
1188 Changes since 3.0 Beta 2 Patchlevel 24
1190 - Went over problematic failover state transitions and made them all
1191 work, so that failover should now much less fragile.
1193 - Add some dhcpctl and omapi documentation
1195 - Fix compile errors when compiling with unusual predefines.
1197 - Make Token Ring work on Linux 2.4
1199 - Fix the Digital Unix BPF_WORDALIGN bug.
1201 - Fix some dhcp client documentation errors.
1203 - Update some parts of the README file.
1205 - Support GCC on SCO.
1207 Changes since 3.0 Beta 2 Patchlevel 23
1209 - Fix a bug in the DNS update code where a status code was not being
1210 checked. This may have been causing core dumps.
1212 - When parsing the lease file, if a lease declaration includes a
1213 billing class statement, and the lease already has a billing class,
1214 unbill the old class.
1216 - When processing failover transactions, where acks will be deferred,
1217 process the state transition immediately.
1219 - Don't try to use the new SIOCGIFCONF buffer size detection code on
1220 Linux 2.0, which doesn't provide this functionality.
1222 - Apply a patch suggested by Tuan Uong for a problem in dlpi.c.
1224 - Fix a problem in using the which command in the configure script.
1226 - Fix a parse error in the client when setting up an omapi listener.
1228 - Document the -n and -g flags to the client.
1230 - Make sure there is always a stdin and stdout on startup. This
1231 prevents shell scripts from accidentally writing error messages into
1232 configuration files that happen to be opened as stderr.
1234 - If an interface is removed, the client will now notice that it is
1235 gone rather than spinning. This has only been tested on NetBSD.
1237 - The client will attempt to get an address even if it can't create a
1240 - Don't overwrite tracefiles.
1242 - Fix some memory allocation bugs in failover.
1244 Changes since 3.0 Beta 2 Patchlevel 22
1246 - Apply some patches suggested by Cyrille Lefevre, who is maintaining
1247 the FreeBSD ISC DHCP Distribution port.
1249 - Fix a core dump in DHCPRELEASE.
1251 Changes since 3.0 Beta 2 Patchlevel 21
1253 - This time for sure: fix the spin described in the changes for pl20.
1255 Changes since 3.0 Beta 2 Patchlevel 20
1257 - Fix a problem with Linux detecting large numbers of interfaces (Ben)
1259 - Fix a memory smash in the quotify code, which was introduced in
1262 - Actually fix the spin described in the changes for pl20. The
1263 previous fix only partially fixed the problem - enough to get it
1264 past the regression test.
1266 Changes since 3.0 Beta 2 Patchlevel 19
1268 - Fix a bug that could cause the server to abort if compiled with
1269 POINTER_DEBUG enabled.
1271 - Fix a bug that could cause the server to spin when responding to a
1274 - Apply Joost Mulders' suggested patches for DLPI on x86.
1276 - Support NUL characters in quoted strings.
1278 - Install unformatted man pages on SunOS.
1280 Changes since 3.0 Beta 2 Patchlevel 18
1282 - Allow the server to be placed in partner-down state using OMAPI.
1285 - Implement omshell, which can be used to do arbitrary things to the
1286 server (in theory). (Damien Neil)
1288 - Fix a case where if a client had two different leases the server could
1289 actually dereference the second one when it hadn't been referenced,
1290 leading to memory corruption and a core dump. (James Brister)
1292 - Fix a case where a client could request the address of another client's
1293 lease, but find_lease wouldn't detect that the other client had it, and
1294 would attempt to allocate it to the client, resulting in a lease conflict
1297 - Fix a case where a client with more than one client identifier could be
1298 given a lease where the hardware address was correct but the client
1299 identifier was not, resulting in a lease conflict message.
1301 - Fix a problem where the server could write out a colon-separated
1302 hex list as a value for a variable, which would then not parse.
1303 The fix is to always write strings as quoted strings, with any
1304 non-printable characters quoted as octal escape sequences. So
1305 a file written the old way still won't work, but new files written
1308 - Fix documentation for sending non-standard options.
1310 - Use unparsable names for unknown options. WARNING: this will
1311 break any configuration files that use the option-nnn convention.
1312 If you want to continue to use this convention for some options,
1313 please be sure to write a definition, like this:
1315 option option-nnn code nnn = string;
1317 You can use a descriptive name instead of option-nnn if you like.
1319 - Fix a problem where we would see a DHCPDISCOVER/DHCPOFFER/
1320 DHCPREQUEST/DHCPACK/DHCPREQUEST/DHCPNAK sequence. This was the
1321 result of a deceptively silly bug in supersede_lease.
1323 - Fix client script exit status check, according to a fix supplied by
1326 - Fix an endianness bug in the tracefile support, regarding ICMP
1329 - Fix a bug in the client where the medium would not work correctly if
1330 it contained quoted strings.
1332 ** there was no pl17 **
1334 Changes since 3.0 Beta 2 Patchlevel 16
1336 - Add support for transaction tracing. This allows the state of the
1337 DHCP server on startup, and all the subsequent transactions, to be
1338 recorded in a file which can then be played back to reproduce the
1339 behaviour of the DHCP server. This can be used to quickly
1340 reproduce bugs that cause core dumps or corruption, and also for
1341 tracking down memory leaks.
1343 - Incorporate some bug fixes provided by Joost Mulders for the DLPI
1344 package which should clear up problems people have been seeing on
1347 - Fix bugs in the handling of options stored as linked lists (agent
1348 options, fqdn options and nwip options) that could cause memory
1349 corruption and core dumps.
1351 - Fix a bug in DHCPREQUEST handling that resulted in DHCPNAK messages
1352 not being send in some cases when they were needed.
1354 - Make the lease structure somewhat more compact.
1356 - Make initial failover startup *much* faster. This was researched
1357 and implemented by Damien Neil.
1359 - Add a --version flag to all executables, which prints the program
1360 name and version to standard output.
1362 - Don't rewrite the lease file every thousand leases.
1364 - A bug in nit.c for older SunOS machines was fixed by a patch sent in
1365 by Takeshi Hagiwara.
1367 - Fix a memory corruption bug in the DHCP client.
1369 - Lots of documentation updates.
1371 - Add a feature allowing environment variables to be passed to the
1372 DHCP client script on the DHCP client command line.
1374 - Fix client medium support, which had been broken for some time.
1376 - Fix a bug in the DHCP client initial startup backoff interval, which
1377 would cause two DHCPDISCOVERS to be sent back-to-back on startup.
1380 Changes since 3.0 Beta 2 Patchlevel 15
1382 - Some documentation tweaks.
1384 - Maybe fix a problem in the DLPI code.
1386 - Fix some error code space inconsistencies in ddns update code.
1388 - Support relay agents that intercept unicast DHCP messages to stuff
1389 agent options into them.
1391 - Fix a small memory leak in the relay agent option support code.
1393 - Fix a core dump that would occur if a packet was sent with no
1396 Changes since 3.0 Beta 2 Patchlevel 14
1398 - Finish fixing a long-standing bug in the agent options code. This
1399 was causing core dumps and failing to operate correctly - in
1400 particular, agent option stashing wasn't working. Agent option
1401 stashing should now be working, meaning that agent options can be
1402 used in class statements to control address allocation.
1404 - Fix up documentation.
1406 - Fix a couple of small memory leaks that would have added up
1407 significantly in a high-demand situation.
1409 - Add a log-facility configuration parameter.
1411 - Fix a compile error on some older operating systems.
1413 - Add the ability in the client to execute certain statements before
1414 transmitting packets to the server. Handy for debugging; not much
1415 practical use otherwise.
1417 - Don't send faked-out giaddr when renewing or bound - again, useful
1420 Changes since 3.0 Beta 2 Patchlevel 13
1422 - Fixed a problem where the fqdn decoder would sometimes try to store
1423 an option with an (unsigned) negative length, resulting in a core
1424 dump on some systems.
1426 - Work around the Win98 DHCP client, which NUL-terminates the FQDN
1429 - Work around Win98 and Win2k clients that will claim they want to do
1430 the update even when they don't have any way to do it.
1432 - Fix some log messages that can be printed when failover is operating
1433 that were not printing enough information.
1435 - It was possible for a DHCPDISCOVER to get an allocation even when
1436 the state machine said the server shouldn't be responding.
1438 - Don't load balance DHCPREQUESTs from clients in RENEWING and
1439 REBINDING, since in RENEWING, if we heard it, it's for us, and in
1440 REBINDING, the client wouldn't have got to REBINDING if its primary
1443 - When we get a bogus state lease binding state transition, don't do
1447 Changes since 3.0 Beta 2 Patchlevel 12
1449 - Fixed a couple of silly compile errors.
1451 Changes since 3.0 Beta 2 Patchlevel 11
1453 - Albert Herranz tracked down and fixed a subtle bug in the base64
1454 decoder that would prevent any key with an 'x' in its base64
1455 representation from working correctly.
1457 - Thanks to Chris Cheney and Michael Sanders, we have a fix for the
1458 hang that they both spotted in the DHCP server - when
1459 one-lease-per-client was set, the code to release the "other" lease
1462 - Fix a problem with alignment of the input buffer in bpf in cases
1463 where two packets arrive in the same bpf read.
1465 - Fix a problem where the relay agent would crash if you specified an
1466 interface name on the command line.
1468 - Add the ability to conditionalize client behaviour based on the
1471 - Add support for the FQDN option, and added support for a new way of
1472 doing ddns updates (ddns update style interim) that allows more than
1473 one DHCP server to update the DNS for the same network(s). This
1474 was implemented by Damien Neil with some additional functionality
1477 - Damien added a "log" statement, so that the configuration file can
1478 be made to log debugging information and other information.
1480 - Fixed a bug that caused option buffers not to be terminated with an
1483 - Fixed a long-standing bug in the support for option spaces where the
1484 options are stored as an ordered list rather than in a hash table,
1485 which could theoretically result in memory pool corruption.
1487 - Prevent hardware declarations with no actual hardware address from
1488 being written as something unparsable, and behave correctly in the
1489 face of a null hardware address on input.
1491 - Allow key names to be FQDNs, and qualify the algorithm name if it is
1492 specified unqualified.
1494 - Modify the DDNS update code so that it never prints the "resolver
1495 failed" message, but instead says *why* the resolver failed.
1497 - Officially support the subnet selection option, which now has an
1500 - Fix a build bug on MacOS X.
1502 - Allow administrator to disable ping checking.
1504 - Clean up dhcpd.conf documentation and add more information about how
1507 Changes since 3.0 Beta 2 Patchlevel 10
1509 - Fix a bug introduced during debugging (!) and accidentally committed
1512 Changes since 3.0 Beta 2 Patchlevel 9
1514 - Fix DHCP client handling of vendor encapsulated options.
1516 - Fix a bug in the handling of relay agent information options introduced
1519 - Stash agent options on client leases by default, and use the stashed
1520 options at renewal time.
1522 - Add the ability to test the client's binding state in the client
1523 configuration language.
1525 - Fix a core dump in the DNS update code.
1527 - Fix some expression evaluation bugs that were causing updates to be
1528 done when no client hostname was received.
1530 - Fix expression evaluation debugging printfs.
1532 - Teach pretty_print_option to print options in option spaces other than
1533 the DHCP option space.
1535 - Add a warning message if the RHS of a not is not boolean.
1537 - Never select for more than a day, because some implementations of
1538 select will just fail if the timeout is too long (!).
1540 - Fix a case where a DHCPDISCOVER from an unknown network would be
1543 - Fix a bug where if a client requested an IP address for which a different
1544 client had the lease, the DHCP server would reallocate it anyway.
1546 - Fix the DNS update code so that if the client changes its name, the DNS
1547 will be correctly updated.
1549 Changes since 3.0 Beta 2 Patchlevel 8
1551 - Oops, there was another subtle math error in the header-length
1554 Changes since 3.0 Beta 2 Patchlevel 7
1556 - Oops, forgot to byte-swap udp header length before bounds-checking it.
1558 Changes since 3.0 Beta 2 Patchlevel 6
1560 - Fix a possible DoS attack where a client could cause the checksummer
1561 to dump core. This was a read, not a write, so it shouldn't be
1562 possible to exploit it any further than that.
1564 - Implement client- and server-side support for using the Client FQDN
1567 - Support for other option spaces in the client has been added. This
1568 means that it is now possible to define a vendor option space on the
1569 client, request options in that space from the server (which must
1570 define the same option space), and then use those options in the
1571 client. This also allows NWIP and Client FQDN options to be used
1574 - Add object initializer support. This means that objects can now be
1575 initialized to something other than all-zeros when allocated, which
1576 makes, e.g., the interface object support code a little more robust.
1578 - Fix an off-by-one bug in the host stuffer. This was causing host
1579 deletes not the work, and may also have been causing OMAPI
1580 connections to get dropped. Thanks to James Brister for tracking
1583 - Fixed a core dump in the interface discovery code that is triggered
1584 when there is no subnet declaration for an interface, but the server
1585 decides to continue running. Thanks to Shane Kerr for tracking
1586 down and fixing this problem.
1588 Changes since 3.0 Beta 2 Patchlevel 5
1590 - Fix a bug in the recent enhancement to the interface discovery code
1591 to support arbitrary-length interface lists.
1593 - Support NUL-terminated DHCP options when initializing client-script
1596 - Fix suffix operator.
1598 - Fix NetWare/IP option parsing.
1600 - Better error/status checking in dhcpctl initialization and omapi
1603 - Fix a potential memory smash in dhcpctl code.
1605 - Fix SunOS4 and (maybe) Ultrix builds.
1607 - Fix a bug where a certain sort of incoming packet could cause a core
1608 dump on Solaris (and probably elsewhere).
1610 - Add some more safety checks in error logging code.
1612 - Add support for ISC_R_INCOMPLETE in OMAPI protocol connection code.
1614 - Fix relay agent so that if an interface is specified on the command
1615 line, the relay agent does not dump core.
1617 - Fix class matching so that match if can be combined with match or
1620 - Do not allow spurious leases in the lease database to introduce
1621 potentially bogus leases into the in-memory database.
1623 - Fix a byte-order problem in the client hardware address type code
1626 - Be slightly less picky about what sort of hardware addresses OMAPI
1627 can install in host declarations.
1629 Changes since 3.0 Beta 2 Patchlevel 4
1631 - Incorporated Peter Marschall's proposed change to array/record
1632 parsing, which allows things like the slp-agent option to be encoded
1633 correctly. Thanks very much to Peter for taking the initiative to
1634 do this, and for doing such a careful job of it (e.g., updating the
1637 - Added an encoding for the slp-agent option. :')
1639 - Fixed SunOS 4 build. Thanks to Robert Elz for responding to my
1640 request for help on this with patches!
1642 - Incorporated a change that should fix a problem reported by Philippe
1643 Jumelle where when the network connection between two servers is
1644 lost, they never reconnect.
1646 - Fix client script files other than that for NetBSD to actually use
1647 make_resolv_conf as documented in the manual page.
1649 - Fix a bug in the packet handling code that could result in a core
1652 - Fix a bug in the bootp code where responses on the local net would
1653 be sent to the wrong MAC address. Thanks to Jerry Schave for
1656 Changes since 3.0 Beta 2 Patchlevel 3
1658 - In the DHCP client, execute client statements prior to using the values
1659 of options, so that the client configuration can overried, e.g., the
1662 - Fix a reference counting error that would result in very reproducible
1663 failures in updates, as well as occasional core dumps, if a zone was
1664 declared without a key.
1666 - Fix some Linux 2.0 compilation problems.
1668 - Fix a bug in scope evaluation during execution of "on" statements that
1669 caused values not to be recorded on leases.
1671 - If the dhcp-max-message-size option is specified in scope, and the
1672 client didn't send this option, use the one specified in scope to
1673 determine the maximum size of the response.
1675 Changes since 3.0 Beta 2 Patchlevel 2
1677 - Fix a case where spawning subclasses were being allocated
1678 incorrectly, resulting in a core dump.
1680 - Fix a case where the DHCP server might inappropriately NAK a
1683 - Fix a place dhcprequest() where static leases could leak.
1685 - Include memory.h in omapip_p.h so that we don't get warnings about
1688 Changes since 3.0 Beta 2 Patchlevel 1
1690 - Notice when SIOCFIGCONF returns more data than fit in the buffer -
1691 allocate a larger buffer, and retry. Thanks to Greg Fausak for
1694 - In the server, if no interfaces were configured, report an error and
1697 - Don't ever record a state of 'startup'.
1699 - Don't try to evaluate the local failover binding address if none was
1700 specified. Thanks to Joseph Breu for finding this.