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1 | Internet Systems Consortium DHCP Distribution | |
2 | Version 4.2.0 | |
3 | 21 December 2012 | |
4 | ||
5 | Release Notes | |
6 | ||
7 | NEW FEATURES | |
8 | ||
9 | ISC DHCP 4.2.x includes features that were not included in DHCP 4.1.x. | |
10 | These include: | |
11 | ||
12 | Processing the DHCP to DNS server transactions in an asyncrhonous fashion. | |
13 | The DHCP server or client can now continue with it's processing while | |
14 | awaiting replies from the DNS server. | |
15 | ||
16 | There are a number of DHCPv6 limitations and features missing in this | |
17 | release, which will be addressed in the future: | |
18 | ||
19 | - Only Solaris, Linux, FreeBSD, NetBSD, and OpenBSD are supported. | |
20 | ||
21 | - DHCPv6 includes human-readable text in status code messages, in | |
22 | English. A method to reconfigure or support other languages would | |
23 | be preferrable. | |
24 | ||
25 | - The "host-identifier" option is limited to a simple token. | |
26 | ||
27 | - The client and server can only operate DHCPv4 or DHCPv6 at a time, | |
28 | not both. To use both protocols simultaneously, two instances of the | |
29 | relevant daemon are required, one with the '-6' command line option. | |
30 | ||
31 | For information on how to install, configure and run this software, as | |
32 | well as how to find documentation and report bugs, please consult the | |
33 | README file. | |
34 | ||
35 | ISC DHCP uses standard GNU configure for installation. Please review the | |
36 | output of "./configure --help" to see what options are available. | |
37 | ||
38 | The system has only been tested on Linux, FreeBSD, and Solaris, and may not | |
39 | work on other platforms. Please report any problems and suggested fixes to | |
40 | <dhcp-users@isc.org>. | |
41 | ||
42 | Changes since 4.2.0 | |
43 | ||
44 | - Documentation cleanup covering multiple tickets | |
45 | [ISC-Bugs #20265] [ISC-Bugs #20259] minor cleanup | |
46 | [ISC-Bugs #20263] add text describing some default values | |
47 | [ISC-Bugs #20193] single quotes at the start of a line indicate a control | |
48 | line to nroff, escape them if we actually want a quote. | |
49 | [ISC-Bugs #18916] sync the pointer to web pages amongst the different docs | |
50 | ||
51 | - 'get-host-names true;' now also works even if 'use-host-decl-names true;' | |
52 | was also configured. The nature of this repair also fixes another | |
53 | error; the host-name supplied by a client is no longer overridden by a | |
54 | reverse lookup of the lease address. Thanks to a patch from Wilco Baan | |
55 | Hofman supplied to us by the Debian package maintenance team. | |
56 | [ISC-Bugs #21691] {Debian Bug#509445} | |
57 | ||
58 | - The .TH tag for the dhcp-options manpage was typo repaired | |
59 | thanks to a report from jidanni and the Debian package maintenance | |
60 | team. [ISC-Bugs #21676] {Debian Bug#563613} | |
61 | ||
62 | - More documentation changes - primarily to put the options in the dhclient | |
63 | and dhcpd man pages into the standard form. Thanks in part to a patch | |
64 | from David Cantrell at Red Hat. | |
65 | [ISC-Bugs #20264] and parts of [ISC-Bugs #17744] dhclient.8 changes | |
66 | ||
67 | - Add code to clear the pointer to an object in an OMAPI handle when the | |
68 | object is freed due to a dereference. [ISC-Bugs #21306] | |
69 | ||
70 | - Fixed a bug that leaks host record references onto lease structures, | |
71 | causing the server to apply configuration intended for one host to any | |
72 | other innocent clients that come along later. [ISC-Bugs #22018] | |
73 | ||
74 | - Minor code fixes | |
75 | [ISC-Bugs #19566] When trying to find the zone for a name for ddns allow | |
76 | the name to be at the apex of the zone. | |
77 | [ISC-Bugs #19617] Restrict length of interface name read from command line | |
78 | in dhcpd - based on a patch from David Cantrell at Red Hat. | |
79 | [ISC-Bugs #20039] Correct some error messages in dhcpd.c | |
80 | [ISC-Bugs #20070] Better range check on values when creating a DHCID. | |
81 | [ISC-Bugs #20198] Avoid writing past the end of the field when adding | |
82 | overly long file or server names to a packet and add a log message | |
83 | if the configuration supplied overly long names for these fields. | |
84 | Thanks to Martin Pala. | |
85 | [ISC-Bugs #21497] Add a little more randomness to rng seed in client | |
86 | thanks to a patch from Jeremiah Jinno. | |
87 | ||
88 | - Correct error handling in DLPI [ISC-Bugs #20378] | |
89 | ||
90 | - Remove __sun__ and __hpux__ typedefs in osdep.h as they are now being | |
91 | checked in configure. [ISC-Bugs #20443] | |
92 | ||
93 | - Modify how the cmsg header is allocated the v6 send and received routines | |
94 | to compile on more compilers. [ISC-Bugs #20524] | |
95 | ||
96 | - When parsing a domain name free the memory for the name after we are | |
97 | done with it. [ISC-Bugs #20824] | |
98 | ||
99 | Changes since 4.2.0b2 | |
100 | ||
101 | - Add declaration for variable in debug code in alloc.c. [ISC-Bugs #21472] | |
102 | ||
103 | Changes since 4.2.0b1 | |
104 | ||
105 | - Prohibit including lease time information in a response to a DHCP INFORM. | |
106 | [ISC-Bugs #21092] | |
107 | ||
108 | ! Accept a client id of length 0 while hashing. Previously the server would | |
109 | exit if it attempted to hash a zero length client id, providing attackers | |
110 | with a simple denial of service attack. [ISC-Bugs #21253] | |
111 | CERT: VU#541921 - CVE: CVE-2010-2156 | |
112 | ||
113 | - A memory leak in ddns processing was closed. [ISC-Bugs #21377] | |
114 | ||
115 | - Modify the exception handling for initial context creation. Previously | |
116 | we would try and clean up before exiting. This could present problems | |
117 | when the cleanup required part of the context that wasn't available. It | |
118 | also didn't do much as we exited afterwards anyway. Now we simply log | |
119 | the error and exit. [ISC-Bugs #21093] | |
120 | ||
121 | - A bug was fixed that could cause the DHCPv6 server to advertise/assign a | |
122 | previously allocated (active) lease to a client that has changed subnets, | |
123 | despite being on different shared networks. Dynamic prefixes specifically | |
124 | allocated in shared networks also now are not offered if the client has | |
125 | moved. [ISC-Bugs #21152] | |
126 | ||
127 | - Add some debugging output for use with the DDNS code. [ISC-Bugs #20916] | |
128 | ||
129 | - Fix the trace code to handle timing events better and to truncate a file | |
130 | before using instead of overwriting it. [ISC-Bugs #20969] | |
131 | ||
132 | - Modify the determination of the default TTL to use for DDNS updates. | |
133 | The user may still configure the ttl via ddns-ttl. The default for | |
134 | both v4 and v6 is now 1/2 the (preferred) lease time with a limit. The | |
135 | previous defaults (1/2 lease time without a limit for v4 and a default | |
136 | value for v6) may be used by defining USE_OLD_DDNS_TTL in site.h | |
137 | [ISC-Bugs #21126] | |
138 | ||
139 | - libisc/libdns is now brought up to version 9.7.1rc1. This corrects | |
140 | three reported flaws in ISC DHCP; | |
141 | ||
142 | o DHCP processes (dhcpd, dhclient) fail to start if one of either the | |
143 | IPv4 or IPv6 address families is not present. [ISC-Bugs #21122] | |
144 | ||
145 | o Assertion failure when attempting to cancel a previously running DDNS | |
146 | update. [ISC-Bugs #21133] | |
147 | ||
148 | o Compilation failure of libisc/libdns due to the use of a flexible | |
149 | array member. [ISC-Bugs #21316] | |
150 | ||
151 | Changes since 4.2.0a2 | |
152 | ||
153 | - Update the fsync code to work with the changes to the DDNS code. It now | |
154 | uses a timer instead of noticing if there are no more packets to process. | |
155 | ||
156 | - When constructing the DNS name structure from a text string append | |
157 | the root to relative names. This satisfies a requirement in the DNS | |
158 | library that names be absolute instead of relative and prevents DHCP | |
159 | from crashing. [ISC-Bugs #21054] | |
160 | ||
161 | - "The LDAP Patch" that has been circulating for some time, written by | |
162 | Brian Masney and S.Kalyanasundraram and maintained for application to | |
163 | the DHCP-4 sources by David Cantrell has been included. Please be | |
164 | advised that these sources were contributed, and do not yet meet the | |
165 | high standards we place on production sources we include by default. | |
166 | As a result, the LDAP features are only included by using a compile-time | |
167 | option which defaults off, and if you enable it you do so under your | |
168 | own recognizance. We will be improving this software over time. | |
169 | [ISC-Bugs #17741] | |
170 | ||
171 | Changes since 4.2.0a1 | |
172 | ||
173 | - When using 'ignore client-updates;', the FQDN returned to the client | |
174 | is no longer truncated to one octet. | |
175 | ||
176 | - Cleaned up an unused hardware address variable in nak_lease(). | |
177 | ||
178 | - Manpage entries for the ia-pd and ia-prefix options were updated to | |
179 | reflect support for prefix delegation. | |
180 | ||
181 | - Cleaned up some compiler warnings | |
182 | ||
183 | - An optimization described in the failover protocol draft is now included, | |
184 | which permits a DHCP server operating in communications-interrupted state | |
185 | to 'rewind' a lease to the state most recently transmitted to its peer, | |
186 | greatly increasing a server's endurance in communications-interrupted. | |
187 | This is supported using a new 'rewind state' record on the dhcpd.leases | |
188 | entry for each lease. | |
189 | ||
190 | - Fix the trace code which was broken by the changes to the DDNS code. | |
191 | ||
192 | Changes since 4.1.0 (new features) | |
193 | ||
194 | - Failover port configuration can now be left to defaults (port 647) as | |
195 | described in the -12 revision of the Failover draft (and assigned by | |
196 | IANA). Thanks in part to a patch from David Cantrell at Red Hat. | |
197 | ||
198 | - If configured, dhclient may now transmit to an anycast MAC address, | |
199 | rather than using a broadcast address. Thanks to a patch from David | |
200 | Cantrell at Red Hat. | |
201 | ||
202 | - Added client support for setting interface MTU and metric, thanks to | |
203 | Roy "UberLord" Marples <roy@marples.name>. | |
204 | ||
205 | - Added client -D option to specify DUID type to send. | |
206 | ||
207 | - A new failover configuration parameter has been introduced for those | |
208 | environments where DHCP servers can be reasonably guaranteed to be | |
209 | "down" when the failover TCP socket is severed, "auto-partner-down". | |
210 | This parameter is not generally safe, and by default is disabled, so | |
211 | please carefully review the documentation of this parameter in the | |
212 | dhcpd.conf(5) manpage before determining to use it yourself. | |
213 | ||
214 | - Added a configuration function, 'gethostname()', which calls the system | |
215 | function of the same name and presents the results as a data expression. | |
216 | This function can be used to incorporate the system level hostname of | |
217 | the system the DHCP software is operating on in responses or queries (such | |
218 | as including a failover partner's hostname in a dhcp message or binding | |
219 | scope, or having a DHCP client send any system hostname in the host-name or | |
220 | FQDN options by default). | |
221 | ||
222 | - The dhcp-renewal-time and dhcp-rebinding-time options may now be configured | |
223 | for DHCPv4 operation and used independently of the dhcp-lease-time | |
224 | calculations. Invalid renew and rebinding times (e.g., greater than the | |
225 | determined lease time) are omitted. | |
226 | ||
227 | - Processing the DHCP to DNS server transactions in an asyncrhonous fashion. | |
228 | The DHCP server or client can now continue with it's processing while | |
229 | awaiting replies from the DNS server. | |
230 | ||
231 | - The 'hardware [ethernet|etc] ...;' parameter in host records has been | |
232 | extended to attempt to match DHCPv6 clients by the last octets of a | |
233 | DUID-LL or DUID-LLT provided by the client. | |
234 | ||
235 | Changes since 4.1.0 (bug fixes) | |
236 | ||
237 | - Remove infinite loop in token_print_indent_concat(). | |
238 | ||
239 | - Validate the argument to the -p option. | |
240 | ||
241 | - The notorious 'option <unknown> ... larger than buffer' log line, | |
242 | which is seen in some malformed DHCP client packets, was modified. | |
243 | It now logs the universe name, and does not log the length values | |
244 | (which are bogus corruption read from the packet anyway). It also | |
245 | carries a hopefully more useful explanation. | |
246 | ||
247 | - Suppress spurious warnings from configure about --datarootdir | |
248 | ||
249 | - A bug was fixed that caused the server not to answer some valid Solicit | |
250 | and Request packets, if the dynamic range covering any requested addresses | |
251 | had been deleted from configuration. | |
252 | ||
253 | - Update the code to deal with GCC 4.3. This included two sets of changes. | |
254 | The first is to the configuration files to include the use of | |
255 | AC_USE_SYSTEM_EXTENSIONS. The second is to deal with return values that | |
256 | were being ignored. | |
257 | ||
258 | - The db-time-format option was documented in manpages. | |
259 | ||
260 | - Using reserved leases no longer results in 'lease with binding state | |
261 | free not on its queue' error messages, thanks to a patch from Frode | |
262 | Nordahl. | |
263 | ||
264 | - Fix a build error in dhcrelay, using older versions of gcc with | |
265 | dhcpv6 disabled. | |
266 | ||
267 | - Two uninitialized stack structures are now memset to zero, thanks to a | |
268 | patch from David Cantrell at Red Hat. | |
269 | ||
270 | - Fixed a cosmetic bug where pretty-printing valid domain-search options would | |
271 | result in an erroneous error log message ('garbage in format string'). | |
272 | ||
273 | - A bug in DLPI packet transmission (Solaris, HP/UX) that caused the server | |
274 | to stop receiving packets is fixed. The same fix also means that the MAC | |
275 | address will no longer appear 'bogus' on DLPI-based systems. | |
276 | ||
277 | - A bug in select handling was discovered where the results of one select() | |
278 | call were discarded, causing the server to process the next select() call | |
279 | and use more system calls than required. This has been repaired - the | |
280 | sockets will be handled after the first return from select(), resulting in | |
281 | fewer system calls. | |
282 | ||
283 | - The update-conflict-detection feature would leave an FQDN updated without | |
284 | a DHCID (still currently implemented as a TXT RR). This would cause later | |
285 | expiration or release events to fail to remove the domain name. The feature | |
286 | now also inserts the client's up to date DHCID record, so records may safely | |
287 | be removed at expiration or release time. Thanks to a patch submitted by | |
288 | Christof Chen. | |
289 | ||
290 | - Memory leak in the load_balance_mine() function is fixed. This would | |
291 | leak ~20-30 octets per DHCPDISCOVER packet while failover was in use | |
292 | and in normal state. | |
293 | ||
294 | - Various compilation fixes have been included for the memory related | |
295 | DEBUG #defines in includes/site.h. | |
296 | ||
297 | - Fixed Linux client script 'unary operator expected' errors with DHCPv6. | |
298 | ||
299 | - Fixed setting hostname in Linux hosts that require hostname argument | |
300 | to be double-quoted. Also allow server-provided hostname to | |
301 | override hostnames 'localhost' and '(none)'. | |
302 | ||
303 | - Fixed failover reconnection retry code to continue to retry to reconnect | |
304 | rather than restarting the listener. | |
305 | ||
306 | - Compilation on Solaris with USE_SOCKETS defined in includes/site.h has | |
307 | been repaired. Other USE_ overrides should work better. | |
308 | ||
309 | - A check for the local flavor of IFNAMSIZ had a broken 'else' condition, | |
310 | that probably still resulted in the correct behaviour (but wouldn't use | |
311 | a larger defined value provided by the host OS). | |
312 | ||
313 | - Fixed a bug where an OMAPI socket disconnection message would not result | |
314 | in scheduling a failover reconnection, if the link had not negotiated a | |
315 | failover connect yet (e.g.: connection refused, asynch socket connect() | |
316 | timeouts). | |
317 | ||
318 | - A bug was fixed that caused the 'conflict-done' state to fail to be parsed | |
319 | in failover state records. | |
320 | ||
321 | ! A stack overflow vulnerability was fixed in dhclient that could allow | |
322 | remote attackers to execute arbitrary commands as root on the system, | |
323 | or simply terminate the client, by providing an over-long subnet-mask | |
324 | option. CERT VU#410676 - CVE-2009-0692 | |
325 | ||
326 | - Fixed a bug where relay agent options would never be returned when | |
327 | processing a DHCPINFORM. | |
328 | ||
329 | - Versions 3.0.x syntax with multiple name->code option definitions is now | |
330 | supported. Note that, similarly to 3.0.x, for by-code lookups only the | |
331 | last option definition is used. | |
332 | ||
333 | - Fixed a bug where a time difference of greater than 60 seconds between a | |
334 | failover pair could cause the primary to crash on contact with the | |
335 | secondary. Thanks to a patch from Steinar Haug. | |
336 | ||
337 | - Don't look for IPv6 interfaces on Linux when running in DHCPv4 mode. | |
338 | Thanks to patches from Matthew Newton and David Cantrell. | |
339 | ||
340 | - Secondary servers in a failover pair will now perform ddns removals if | |
341 | they had performed ddns updates on a lease that is expiring, or was | |
342 | released through the primary. As part of the same fix, stale binding scopes | |
343 | will now be removed if a change in identity of a lease's active client is | |
344 | detected, rather than simply if a lease is noticed to have expired (which it | |
345 | may have expired without a failover server noticing in some situations). | |
346 | ||
347 | - A patch supplied by David Cantrell at RedHat was applied that detects | |
348 | invalid calling parameters given to the ns_name_ntop() function. | |
349 | Specifically, it detects if the caller passed a pointer and size pair | |
350 | that causes the pointer to integer-wrap past zero. | |
351 | ||
352 | ! Fixed a fenceposting bug when a client had two host records configured, | |
353 | one using 'uid' and the other using 'hardware ethernet'. CVE-2009-1892 | |
354 | ||
355 | - Fixed the check in the dhcp_interface_signal_handler routine to verify | |
356 | the existence of the linked signal handler before calling it. | |
357 | ||
358 | - Both host and subnet6 configuration groups are now included whether a | |
359 | fixed-address6 (DHCPv6) is in use or not. Host scoped configuration takes | |
360 | precedence. This fixes two bugs, one where host scoped configuration | |
361 | would not be included from a non-fixed-address6 host record, and the equal | |
362 | and opposite bug where subnet6 scoped configuration would not be used when | |
363 | over-riding values were not present in a matching fixed-address6 host | |
364 | configuration. | |
365 | ||
366 | - ./configure now checks to ensure the intX_t and u_intX_t types are defined, | |
367 | correcting a compilation failure when using Sun's compiler. | |
368 | ||
369 | - Modified the handling of a connection to avoid releasing the omapi io | |
370 | object for the connection while it is still in use. One symptom from | |
371 | this error was a segfault when a failover secondary attempted to connect | |
372 | to the failover primary if their clocks were not synchronized. | |
373 | ||
374 | - Clean up to allow compilation with gcc 2.95.4 on FreeBSD. Remove an | |
375 | extra semi-colon from common/dns.c and moved setting a variable to NULL | |
376 | in server/dhcpv6.c to allow the compiler to decide that the variable | |
377 | was always properly set. | |
378 | ||
379 | Changes since 4.1.0b1 | |
380 | ||
381 | - A missing "else" in dhcrelay.c could have caused an interface not to | |
382 | be recognized. | |
383 | ||
384 | Changes since 4.1.0a2 | |
385 | ||
386 | - A cosmetic bug in DHCPDECLINE processing was fixed which caused all | |
387 | successful DHCPDECLINEs to be logged as "not found" rather than | |
388 | "abandoned". | |
389 | ||
390 | - Added configuration file examples for DHCPv6. | |
391 | ||
392 | - Some failover debugging #defines have been better defined and some | |
393 | high frequency messages moved to a deeper debugging symbol. | |
394 | ||
395 | - The CLTT parameter in failover is now only updated by client activity, | |
396 | and not by failover binding updates (taking on the peer's CLTT). | |
397 | ||
398 | - Failover BNDUPD messages are now discarded if they conflict with an | |
399 | update that has been transmitted, but not acknowledged. | |
400 | ||
401 | - A bug cleaning up unknown-xxx temporary option definitions was fixed. | |
402 | ||
403 | - Delayed-ack is now a compile-time option, compiled out by default. | |
404 | This feature is simply too experimental for right now, and causes | |
405 | some problems to some failover installations. We will revisit this | |
406 | in future releases. | |
407 | ||
408 | - The !inet_pton() call in res_mkupdrec was adjusted to '<= 0' as | |
409 | inet_pton returns either 1, 0, or -1. | |
410 | ||
411 | - A dhclient-script for MacOS X has been included, which enables | |
412 | 'dhclient -6' support. | |
413 | ||
414 | - DDNS removal routines were updated so that the DHCID is not removed until | |
415 | the client has been deprived of all A and AAAA records (not only the last | |
416 | one of either of those). This resolves a bug where dual stack clients | |
417 | would not be able to regain their names after either expiration event. | |
418 | ||
419 | Changes since 4.1.0a1 | |
420 | ||
421 | - Corrected list of failover state values in dhcpd man page. | |
422 | ||
423 | - Fixed a bug that caused some request types to be logged incorrectly. | |
424 | ||
425 | - Clients that sent a parameter request list containing the | |
426 | routers option before the subnet mask option were receiving | |
427 | only the latter. Fixed. | |
428 | ||
429 | - The server wasn't always sending the FQDN option when it should. | |
430 | ||
431 | - A partner-down failover server no longer emits 'peer holds all free leases' | |
432 | if it is able to newly-allocate one of the peer's leases. | |
433 | ||
434 | - Fixed a coredump when adding a class via OMAPI. | |
435 | ||
436 | - Check whether files are zero length before trying to parse them. | |
437 | ||
438 | - Ari Edelkind's PARANOIA patch has been included and may be compiled in | |
439 | via two ./configure parameters, --enable-paranoia and | |
440 | --enable-early-chroot. | |
441 | ||
442 | - ./configure was extended to cover many optional build features, such | |
443 | as failover, server tracing, debugging, and the execute() command. | |
444 | ||
445 | - There is now a default 1/4 of a second scheduled delay between delayed | |
446 | fsync()'s, it can be configured by the max-ack-delay configuration | |
447 | parameter. | |
448 | ||
449 | - A bug was fixed where the length of a hostname was miscalculated, so that | |
450 | hosts were given odd-looking domain names ("foo.bar.ba.example.com"). | |
451 | ||
452 | - Shared network selection should be done from the innermost relay | |
453 | valid link-address field, rather than the outermost. | |
454 | ||
455 | - Prefix pools are attached to shared network scopes. | |
456 | ||
457 | - Merged IA_XX related structures. | |
458 | ||
459 | - Add DHCPv6 files in configure. | |
460 | ||
461 | - A memory leak when using omapi has been fixed. | |
462 | ||
463 | - DHCPv6 vendor-class options (VSIO) are now only sent when they appear | |
464 | on the DHCPv6 ORO. This resolves a bug where VSIO options were placed | |
465 | in IA_NA encapsulated options fields. | |
466 | ||
467 | - Integrated client with stateless, temporary address and prefix delegation | |
468 | support. | |
469 | ||
470 | - A double-dereference in dhclient transmission of DHCPDECLINEs was | |
471 | repaired. | |
472 | ||
473 | - Fix handling of format code 'Z'. | |
474 | ||
475 | - Support "-1" argument in DHCPv6. | |
476 | ||
477 | - Merge DHCPv6-only "dhcrelay6" into general-purpose "dhcrelay" (use | |
478 | "-6" option to select DHCPv6 mode). | |
479 | ||
480 | - Fix handling of -A and -a flags in dhcrelay; it was failing to expand | |
481 | packet size as needed to add relay agent options. | |
482 | ||
483 | - A bug in subnet6 parsing where options contained in subnet6 clauses would | |
484 | not be applied to clients addressed within that network was repaired. | |
485 | ||
486 | - When configuring a "subnet {}" or "subnet6 {}" without an explicit | |
487 | shared-network enclosing it, the DHCP software would synthesize a | |
488 | shared-network to contain the subnet. However, all configuration | |
489 | parameters within the subnet more intuitively belong "to any client | |
490 | on that interface", or rather the synthesized shared-network. So, | |
491 | when a shared-network is synthesized, it is used to contain the | |
492 | configuration present inside the subnet {} clause. This means that | |
493 | the configuration will be valid for all clients on that network, not | |
494 | just those addressed out of the stated subnet. If you intended the | |
495 | opposite, the workaround is to explicitly configure an empty | |
496 | shared-network. | |
497 | ||
498 | - A bug was fixed where Information-Request processing was not sourcing | |
499 | configured option values. | |
500 | ||
501 | - A warning was added since the DHCPv6 processing software does not yet | |
502 | support class statements. | |
503 | ||
504 | - Compliation warnings on GCC 4.3 relating to bootp source address | |
505 | selection were repaired. | |
506 | ||
507 | - The v6 BSD socket method was updated to use a single UDP BSD socket | |
508 | no matter how many interfaces are involved, differentiating the | |
509 | interfaces the packets were received on by the interface index supplied | |
510 | by the OS. | |
511 | ||
512 | - The relay agent no longer listens to the All DHCP Servers Multicast | |
513 | address. | |
514 | ||
515 | - A bug was fixed in data_string_sprintfa() where va_start was only called | |
516 | once for two invocations of vsprintf() variants. | |
517 | ||
518 | - ERO (RFC 4994) server support. | |
519 | ||
520 | - Basic and partial DHCPv6 leasequery support. | |
521 | ||
522 | - Reliable DHCPv6 release (previous behavior, send release and exit, is | |
523 | still available with dhclient -6 -1 -r). | |
524 | ||
525 | Changes since 4.0.0 (new features) | |
526 | ||
527 | - Added DHCPv6 rapid commit support. | |
528 | ||
529 | - Added explicit parser support for zero-length DHCP options, such as | |
530 | rapid-commit, via format code 'Z'. | |
531 | ||
532 | - It's now possible to update the "ends" field of a lease with OMAPI. | |
533 | This is useful if you want not only to release a lease, but also make | |
534 | it available for reuse right away. Hat tip to Christof Chen. | |
535 | ||
536 | - Fixed definition of the iaaddr hash functions to use the correct | |
537 | functions when referencing and dereferencing memory. | |
538 | ||
539 | - Some definitions not in phase with the IANA registry were updated. | |
540 | ||
541 | - Allocated interface IDs are better controlled ('u' bit set to zero, | |
542 | reserved IDs avoided). | |
543 | ||
544 | - Unicast options are taken into account only for RENEWs. | |
545 | ||
546 | - NoAddrsAvail answers to SOLICITs are always ADVERTISEs even when a SOLICIT | |
547 | carries a rapid-commit option. | |
548 | ||
549 | - Return in place of raise an impossible condition when one tries to release | |
550 | an empty active lease. | |
551 | ||
552 | - Timer granularity is now 1/100s in the DHCPv6 client. | |
553 | ||
554 | - The dhclient-script was updated to create a host route for the default | |
555 | gateway if the supplied subnet mask for an IPv4 address was a /32. This | |
556 | allows the client to work in 'captive' network environments, where the | |
557 | operator does not want clients to crosstalk directly. | |
558 | ||
559 | - MINUS tokens should be parseable again. | |
560 | ||
561 | - Multiple (up to "delayed-ack x;" maximum) DHCPv4 packets are now queued and | |
562 | released in bursts after single fsync() events when the upper limit is | |
563 | reached or if the receiving sockets go dry. The practical upshot is | |
564 | that fsync-coupled server performance is now multiplicitively increased. | |
565 | The default delayed ack limit is 28. Thanks entirely to a patch from | |
566 | Christof Chen. | |
567 | ||
568 | Changes since 4.0.0 (bug fixes) | |
569 | ||
570 | - DHCP now builds on AIX. | |
571 | ||
572 | - Exit with warning when DHCPv6-specific statements are used in the | |
573 | config file but -6 is not specified. | |
574 | ||
575 | - Fixed "--version" flag in dhcrelay | |
576 | ||
577 | - The 'min-secs' configuration parameter's log message has been updated to | |
578 | be more helpful. | |
579 | ||
580 | - The warning logged when an address range doesn't fit in the subnets | |
581 | they were declared has been updated to be more helpful and identify the | |
582 | typo in configuration that created the spanning addresses. | |
583 | ||
584 | - A bug in failover pool rebalancing that caused POOLREQ message ping-pongs | |
585 | was repaired. | |
586 | ||
587 | - A flaw in failover pool rebalancing that could cause POOLREQ messages to | |
588 | be sent outside of the min-balance/max-balance scheduled intervals has | |
589 | been repaired. | |
590 | ||
591 | - A cosmetic bug during potential-conflict recovery that caused the peer's | |
592 | 'conflict-done' state message to be logged as 'unknown-state' has been | |
593 | repaired. It is now logged correctly. | |
594 | ||
595 | - A bug was fixed where the 'giaddr' may be used to find the client's subnet | |
596 | rather than its own 'ciaddr'. | |
597 | ||
598 | - A log message was introduced to clarify the situation where a failover | |
599 | 'address' parameter (the server's local address) did not resolve to an | |
600 | IPv4 address. | |
601 | ||
602 | - The minimum site code value was set to 224 in 3.1.0 to track RFC3942. This | |
603 | broke a lot of legacy site local configurations. The new code in place will | |
604 | track site local space minimum option codes and logs a warning to encourage | |
605 | updates and exploration of site local code migration problems. Option | |
606 | codes less than 128 in site local spaces remain inaccessible. | |
607 | ||
608 | - A possible relay agent option bug was repaired where random server | |
609 | initialization state may have been used to signal the relay agent | |
610 | information options sub-option code for the 'END' of the option space. | |
611 | ||
612 | - Fixes to allow code to compile and run on Solaris 9. | |
613 | ||
614 | - Fixes to allow code to compile on Mac OS X Leopard (10.5). | |
615 | ||
616 | - When server is configured with options that it overrides, a warning is | |
617 | issued when the configuration file is read, rather than at the time the | |
618 | option is overridden. This was important, because the warning was given | |
619 | every time the option was overridden, which could create a lot of | |
620 | unnecessary logging. | |
621 | ||
622 | - Fixed a compilation problems on platforms that define a value for FDDI, | |
623 | which conflicts with a dhcp configuration syntax token by the same name. | |
624 | ||
625 | - When a failover server suspects it has encountered a peer running a | |
626 | version 3.0.x failover server, a warning that the failover wire protocol | |
627 | is incompatible is printed. | |
628 | ||
629 | - The failover server no longer issues a floating point error if it encounters | |
630 | a previously undefined option code. | |
631 | ||
632 | - Fix startup error messages to report a missing "subnet6 declaration", rather | |
633 | than a missing "subnet declaration", when running as a DHCPv6 server. | |
634 | ||
635 | - DHCPv6 client timestamp in DUID was based on the year 1970 rather | |
636 | than the year 2000. | |
637 | ||
638 | - Warn when attempting to use a hardware parameter in DHCPv6. | |
639 | ||
640 | - DHCPv6 released resources are now marked as released by the client. | |
641 | ||
642 | - 'Soft' bindings have no more side-effects. | |
643 | ||
644 | Changes since 4.0.0b3 | |
645 | ||
646 | - The reverse dns name for PTR updates on IPv6 addresses has been fixed to | |
647 | use ip6.arpa. rather than default to in-addr.arpa and require user | |
648 | configuration. | |
649 | ||
650 | - dhc6_lease_destroy() and dhc6_ia_destroy() now set lease and IA pointers | |
651 | to NULL after freeing, to prevent subsequent accesses to freed memory. | |
652 | ||
653 | - The DHCPv6 server would not send the preference option unless the | |
654 | client requested it, via the ORO. This has been fixed, so the DHCPv6 | |
655 | server will always send the preference value if it is configured. | |
656 | ||
657 | - When addresses were passed as hints to the server in an IA, they were | |
658 | incorrectly handled, sometimes being treated as an error. Now the | |
659 | server will treat these as hints and ignore them if it cannot supply | |
660 | a requested address. | |
661 | ||
662 | - If the client had multiple addresses, and one expired (was not renewed | |
663 | by the server), the client would continue to attempt to renew the same | |
664 | old address over and over. Now, the client will omit any expired | |
665 | addresses from future Confirm, Renew, or Rebind messages. | |
666 | ||
667 | - dhclient -6 will now select renew/rebind timers based upon the longest | |
668 | address expiration time rather than the shortest expiration time, in | |
669 | order to avoid cascading renewals in the event a server elects not to | |
670 | extend one of multiple IAADDR leases. | |
671 | ||
672 | - The server now limits clients that request multiple addresses to one | |
673 | address per IA by default, which can be adjusted through the | |
674 | "limit-addrs-per-ia" configuration option. | |
675 | ||
676 | - The DHCPv6 client now issues fresh transaction IDs on Renew and Rebind | |
677 | message exchanges, rather than using the most recent ID. | |
678 | ||
679 | - The DHCPv6 server now replies to Information-Request messages. | |
680 | ||
681 | - A bug was fixed in the dhclient-script for BSDs to correctly carry error | |
682 | codes through some conditions. | |
683 | ||
684 | - The parsing of some options in the dhclient lease file, in particular | |
685 | the success DHCPv6 status-code, was fixed. | |
686 | ||
687 | - A bug was fixed that caused the DHCPv6 ORO option to be corrupted with | |
688 | seemingly random values. | |
689 | ||
690 | - A reference overleak in DHCPv6 shared network processing was repaired. | |
691 | ||
692 | - ./configure now autodetects local database locations rather than trying | |
693 | to put dhcpd.leases and dhclient.leases in /usr/local/var/db, which no | |
694 | one ever has. | |
695 | ||
696 | - Regression fix for bug where server advertised a IPv6 address in | |
697 | response to a SOLICIT but would not return the address in response | |
698 | to a REQUEST. | |
699 | ||
700 | - A bug was fixed where the DHCPv6 server puts the NoAddrsAvail status | |
701 | code in the IA_NA was fixed. The status code now appears in the root | |
702 | level. | |
703 | ||
704 | Changes since 4.0.0b2 | |
705 | ||
706 | - Clarified error message when lease limit exceeded | |
707 | ||
708 | - Relative time may now be used as a qualifier for 'allow' and 'deny' access | |
709 | control lists. These directives may be used to assist in re-addressing | |
710 | address pools without having to constantly reconfigure the server. Please | |
711 | see 'man dhcpd.conf' for more information on allow/deny 'after time' syntax. | |
712 | Thanks to a patch from Christof Chen. | |
713 | ||
714 | - The server will now include multiple IA_NA's and multiple IAADDRs within | |
715 | them, if advertised by the client. It still only seeks to allocate one | |
716 | new address. | |
717 | ||
718 | Changes since 4.0.0b1 | |
719 | ||
720 | - Use different paths for PID and lease files when running in DHCPv4 | |
721 | or DHCPv6 mode, so that servers for both protcols can be run | |
722 | simultaneously on a single interface. | |
723 | ||
724 | - Fixed a buffer overflow error which could have allowed a denial | |
725 | of service under unusual server configurations | |
726 | ||
727 | - Eliminated a spurious error message from the client | |
728 | ||
729 | - A number of bugs with the internal handling of lease state on the | |
730 | server have been fixed. Some of these could cause server crashes. | |
731 | ||
732 | - The peer_wants_leases() changes pulled up from 3.1.0 were corrected, | |
733 | 'never used' leases will no longer consistently shift between servers | |
734 | on every pool rebalance run. | |
735 | ||
736 | - sendmsg()/recvmsg() control buffers are now declared in such a way to | |
737 | ensure they are correctly aligned on all (esp. 64-bit) architectures. | |
738 | ||
739 | - The client leasing subsystem was streamlined and corrected to account | |
740 | more closely for changes in client link attachment selection. | |
741 | ||
742 | Changes since 4.0.0a3 | |
743 | ||
744 | - The DHCP server no longer requires a "ddns-update-style" statement, | |
745 | and now defaults to "none", which means DNS updates are disabled. | |
746 | ||
747 | - Log messages when failover peer names mismatch have been improved to | |
748 | point out the problem. | |
749 | ||
750 | - Bug where server advertised a IPv6 address in response to a SOLICIT | |
751 | but would not return the address in response to a REQUEST. Thanks to | |
752 | Dennis Kou for finding the bug. | |
753 | ||
754 | - Fixed an error causing the server to lock up on lease expiration, | |
755 | reported independently by Jothilingam Vasu and Dennis Kou. | |
756 | ||
757 | - Fixed a ./configure bug where compile tests were failing due to | |
758 | "-Werror" (unused variable) rather than the actual test failure. Lead | |
759 | to inconsistent and unworkable auto-configurations. | |
760 | ||
761 | - Compilation with DLPI and -Werror has been repaired. | |
762 | ||
763 | - Error in decoding IA_NA option if multiple interfaces are present | |
764 | fixed by Marcus Goller. | |
765 | ||
766 | - DHCPv6 server Confirm message processing has been enhanced - it no | |
767 | longer replies only to clients with host {} records, it now replies | |
768 | as directed in RFC3315 section 18.2.2 - that is, to all clients | |
769 | regardless of the existence of bindings. | |
770 | ||
771 | - A core dump during expired lease cleanup has been repaired. | |
772 | ||
773 | - DDNS updates state information are now stored in 'binding scopes' that | |
774 | follow the leases through their lifecycles. This enables DDNS teardowns | |
775 | on leases that are assigned and expired inbetween a server restart (the | |
776 | state is recovered from dhcpd.leases). Arbitrary user-specified binding | |
777 | scopes ('set var = "value";') are not yet supported. | |
778 | ||
779 | - Additional compilation problems on HP/UX have been repaired. | |
780 | ||
781 | Changes since 4.0.0a2 | |
782 | ||
783 | - Fix for startup where there are no IPv4 addresses on an interface. | |
784 | Thanks to Marcus Goller for reporting the bug. | |
785 | ||
786 | - Fixed file descriptor leak on listen failure. Thanks to Tom Clark. | |
787 | ||
788 | - Bug in server configuration parser caused server to get stuck on | |
789 | startup for certain bad pool declarations. Thanks to Guillaume | |
790 | Knispel for the bug report and fix. | |
791 | ||
792 | - Code cleaned to remove warnings reported by "gcc -Wall". | |
793 | ||
794 | - DHCPv6 is now the default. You can disable DHCPv6 support using the | |
795 | "--disable-dhcpv6" flag when you run the configure script. | |
796 | ||
797 | - An internal database inconsistency bug was repaired where the server | |
798 | would segfault if a client attempted to renew a lease that had been | |
799 | loaded from persistent storage. | |
800 | ||
801 | - 'request' and 'also request' syntaxes have been added to accommodate | |
802 | the DHCPv6 client configuration. 'send dhcp6.oro' is no longer | |
803 | necessary. | |
804 | ||
805 | - Bug fixed where configuration file parsing did not work with | |
806 | zero-length options; this made it impossible to set the | |
807 | rapid-commit option. | |
808 | ||
809 | - Bogus messages about host records with IPv4 fixed-addresses being of | |
810 | non-128-bits in length were removed. | |
811 | ||
812 | Changes since 4.0.0a1 | |
813 | ||
814 | - Bug in octal parsing fixed. Thanks to Bernd Fuhrmann for the report | |
815 | and fix. | |
816 | ||
817 | - Autoconf now supplies proper flags for Solaris DHCPv6 builds. | |
818 | ||
819 | - Fix for parsing error on some IPv6 addresses. | |
820 | ||
821 | - Invalid CIDR representation for IPv6 subnets or ranges now checked | |
822 | for when loading configuration. | |
823 | ||
824 | - Compilation on HP/UX has been repaired. The changes should generally | |
825 | apply to any architecture that supplies SIOCGLIFCONF but does not | |
826 | use 'struct lifconf' structures to pass values. | |
827 | ||
828 | - Two new operators, ~= and ~~, have been integrated to implement | |
829 | boolean matches by regular expression (such as may be used in | |
830 | class matching statements). Thanks to a patch by Alexandr S. | |
831 | Agranovsky, which underwent slight modification. | |
832 | ||
833 | - Fix for icmp packets on 64-bit systems (bug introduced in 4.0). | |
834 | ||
835 | - A bug was fixed in interface discovery wherein an error identifying | |
836 | a server-configured interface with no IPv4 addresses would SEGV. | |
837 | ||
838 | - Fixed a bug in which write_lease() might report a failure incorrectly | |
839 | ||
840 | - Added support for DHCPv6 Release messages | |
841 | ||
842 | - Added -x option to dhclient, which triggers dhclient processes | |
843 | to exit gracefully without releasing leases first | |
844 | ||
845 | - All binaries (client, server, relay) now change directories | |
846 | to / before going into daemon mode, so as not to hold $CWD open | |
847 | ||
848 | - Fixed a bug parsing DHCPv6 client-id's in host-identifier statements | |
849 | ||
850 | - Fixed a bug with the 'ddns-updates' boolean server configuration | |
851 | parameter, which caused the server to fail. | |
852 | ||
853 | Changes since 4.0.0-20070413 | |
854 | ||
855 | - Old (expired) leases are now cleaned. | |
856 | ||
857 | - IPv6 subnets now have support for arbitrary allocation ranges via | |
858 | a new 'range6' configuration directive. | |
859 | ||
860 | - An obviated option code hash lookup to find D6O_CLIENTID was removed. | |
861 | ||
862 | - Corrected some situations where variables might be used without being | |
863 | initialized. | |
864 | ||
865 | - Silenced several other compiler warnings. | |
866 | ||
867 | - Include the more standard sys/uio.h rather than rely upon other | |
868 | header files to include it (fixes a BSD 4.2 compile failure). | |
869 | ||
870 | - Duplicate dhclient-script updates for DHCPv6 to all provided scripts. | |
871 | ||
872 | - DHCPv4 I/O methods that failed to sense hardware address were corrected. | |
873 | ||
874 | - DHCPv4 is now the default (as documented) rather than DHCPv6. The default | |
875 | was set to DHCPv6 to facilitate ease early development, and forgotten. | |
876 | ||
877 | - Corrected a segmentation violation in DHCPv4 socket processing. | |
878 | ||
879 | - dhclient will now fork() into the background once it binds to an | |
880 | IPv6 address, or immediately if the -n flag is supplied. | |
881 | ||
882 | - -q is now the default behaviour on dhclient, with -d or -v enabling | |
883 | non-quiet (stderr logging) mode. | |
884 | ||
885 | - Fix documentation of the domain-search atom (quoted, with commas). | |
886 | ||
887 | - Document DHCPv6 options presently in the default table. | |
888 | ||
889 | - Replaced ./configure shellscripting with GNU Autoconf. | |
890 | ||
891 | Changes since 3.1.0 (NEW FEATURES) | |
892 | ||
893 | - DHCPv6 Client and Server protocol support. Use '-6' to run the daemons | |
894 | as v6-only. Use '-4' to run the daemons as v4-only (default. There is | |
895 | no support currently for both. | |
896 | ||
897 | - Server support for multiple IA_NA options, containing at most one | |
898 | IAADDR option. | |
899 | ||
900 | - Client support for one IA_NA option, containing any number of IAADDR | |
901 | options. | |
902 | ||
903 | - Server support for the DHCPv6 Information-request message. | |
904 | ||
905 | - Inappropriate unicast DHCPv6 messages sent to the server are now | |
906 | discarded, and this has rearchitected the IO system slightly. | |
907 | ||
908 | - The DHCPv6 server DUID defaults to type 1, is persistently stored in | |
909 | the leases database, and can be over-ridden (either completely, or by | |
910 | specifying type 1 or type 2). | |
911 | ||
912 | - The server only uses Rapid-Commit if it has been configured with the | |
913 | Rapid-Commit option and the client requests it. | |
914 | ||
915 | - DDNS support. We now update AAAA records in the same place we would | |
916 | update A records, if we have an IPv6 address. We also generate IP6.ARPA | |
917 | style names for PTR records if we're dealing with an IPv6 address. Both | |
918 | A and AAAA updates are done using the same 'fqdn.' virtual option space | |
919 | (although the DHCPv4 FQDN and DHCPv6 FQDN options are formatted | |
920 | differently, they both use the same code here). | |
921 | ||
922 | - The Linux dhclient-script attempts to set and remove assigned addresses, | |
923 | and to configure /etc/resolv.conf from nameserver and domain name | |
924 | configurations. It can be extended to configure other parameters. | |
925 | ||
926 | - Initial DHCPv6 lease support. | |
927 | ||
928 | - The IO system now tracks all local IP addresses, so that the DHCP | |
929 | applications (particularly the dhcrelay) can discern between what frames | |
930 | were transmitted to it, and what frames are being carried through it which | |
931 | it should not intercept. | |
932 | ||
933 | Changes since 3.1.0 (Maintenance) | |
934 | ||
935 | - A bug was repaired where MAC Address Affinity for virgin leases always | |
936 | mapped to the primary. Virgin leases now have an interleaved preference | |
937 | between primary and secondary. | |
938 | ||
939 | - A bug was repaired where MAC Address Affinity for clients with no client | |
940 | identifier was sometimes mishashed to the peer. Load balancing during | |
941 | runtime and pool rebalancing were opposing. | |
942 | ||
943 | - An assertion in lease counting relating to reserved leases was repaired. | |
944 | ||
945 | - The subnet-mask option inclusion now conforms with RFC2132 section 3.3; | |
946 | it will only appear prior to the routers option if it is present on the | |
947 | Parameter-Request-List. The subnet-mask option will also only be | |
948 | included by default (if it is not on the PRL) in response to DISCOVER | |
949 | or REQUEST messages. | |
950 | ||
951 | - The FQDN option is only supplied if the client supplied an FQDN option or | |
952 | if the FQDN option was explicitly requested on the PRL. | |
953 | ||
954 | - Dynamic BOOTP leases are now load balanced in failover. | |
955 | ||
956 | Changes since 3.1.0rc1 | |
957 | ||
958 | - The parse warning that 'deny dyanmic bootp;' must be configured for | |
959 | failover protected subnets was removed. | |
960 | ||
961 | Changes since 3.1.0b2 | |
962 | ||
963 | - Failover rebalance events no longer play ping pong with round errors | |
964 | (moving leases between free and back to backup where there are an | |
965 | odd number of leases). | |
966 | ||
967 | - The 'pool' log line has been split into two messages, one before the | |
968 | rebalance run, and one after. | |
969 | ||
970 | - Any queued BNDACKs are transmitted before transmitting new BNDUPDs. | |
971 | This enforces the correct sequence of events for the remote server | |
972 | processing these messages. | |
973 | ||
974 | Changes since 3.1.0b1 | |
975 | ||
976 | - Fixed a bug that caused OMAPI clients to freeze when opening lease | |
977 | objects. | |
978 | ||
979 | - A new server config option "fqdn-reply" specifies whether the server | |
980 | should send out option 81 (FQDN). Defaults to "on". If set to "off", | |
981 | the FQDN option is not sent, even if the client requested it. This is | |
982 | needed because some clients misbehave otherwise. Thanks to Christof Chen | |
983 | at Allianz. | |
984 | ||
985 | - Allow trace output files (-tf option) to be overwritten, rather than | |
986 | crashing dhcpd if the file already exists | |
987 | ||
988 | - A bug was fixed that caused dhcpd to segfault if a pool was declared | |
989 | outside the scope of a subnet in dhcpd.conf. | |
990 | ||
991 | - Some uninitialized values were repaired in dhcpleasequery.c that | |
992 | caused the server to abort. | |
993 | ||
994 | - A new server config option, 'do-reverse-updates', has been added | |
995 | which causes the server to abstain from performing updates on PTR | |
996 | records. Thanks to a patch from Christof Chen at Allianz. | |
997 | ||
998 | - A bug was repaired in subencapsulation support, where spaces separated | |
999 | by empty spaces would not get included. | |
1000 | ||
1001 | - A bug in dhclient was repaired which caused it to send parameter request | |
1002 | lists of 55 bytes in length no matter how long the declared PRL was. | |
1003 | ||
1004 | - 'dhcp.c(3953): non-null pointer' has been repaired. This fixes a flaw | |
1005 | wherein the DHCPv4 server may ignore a configured server-identifier. | |
1006 | ||
1007 | - A flaw in failover startup sequences was repaired that sometimes left | |
1008 | the primary DHCP server's pool rebalance schedules unscheduled. | |
1009 | ||
1010 | - Corrected a flaw that broke encapsulated spaces included due to presence | |
1011 | on the parameter request list. | |
1012 | ||
1013 | Changes since 3.1.0a3 | |
1014 | ||
1015 | - Some spelling fixes. | |
1016 | ||
1017 | Changes since 3.1.0a2 | |
1018 | ||
1019 | - A bug was fixed where attempting to permit leasequeries results in a | |
1020 | fatal internal error, "Unable to find server option 49". | |
1021 | ||
1022 | - A bug was fixed in dhclient rendering the textual output form of the | |
1023 | domain-search option syntax. | |
1024 | ||
1025 | Changes since 3.1.0a1 | |
1026 | ||
1027 | - A bug in the FQDN universe that added FQDN codes to the NWIP universe's | |
1028 | hash table was repaired. | |
1029 | ||
1030 | - The servers now try harder to transmit pending binding updates when | |
1031 | entering normal state. | |
1032 | ||
1033 | - UPDREQ/UPDREQALL handling was optimized - it no longer dequeues and | |
1034 | requeues all pending updates. This should reduce the number of spurious | |
1035 | 'xid mismatch' log messages. | |
1036 | ||
1037 | - An option definition referencing leak was fixed, which resulted in early | |
1038 | termination of dhclient upon the renewal event. | |
1039 | ||
1040 | - Some default hash table sizes were tweaked, some upwards, some downwards. | |
1041 | 3.1.0a1's tables resulted in a reduction in default server memory use. | |
1042 | The new selected values provide more of a zero sum (increasing the size | |
1043 | of tables likely to be populated, decreasing the size of tables unlikely). | |
1044 | ||
1045 | - Lease structures appear in three separate hashes: by IP address, by UID, | |
1046 | and by hardware address. One type of table was used for all three, and | |
1047 | improvements to IP address hashing were applied to all three (so UID and | |
1048 | hardware addresses were treated like 4-byte integers). There are now two | |
1049 | types of tables, and the uid/hw hashes use functions more appropriate | |
1050 | to their needs. | |
1051 | ||
1052 | - The max-lease-misbalance percentage no longer causes scheduled rebalance | |
1053 | runs to be skipped: it still governs the schedule, but every scheduled | |
1054 | run will attempt balance. | |
1055 | ||
1056 | - A segfault bug in recursive encapsulation support has been corrected. | |
1057 | ||
1058 | Changes since 3.0 (New Features) | |
1059 | ||
1060 | - A workaround for certain STSN servers that send a mangled domain-name | |
1061 | option was introduced for dhclient. The client will now accept corrupted | |
1062 | server responses, if they contain a valid DHCP_MESSAGE_TYPE (OFFER, ACK, | |
1063 | or NAK). The server will continue to not accept corrupt client packets. | |
1064 | ||
1065 | - Support for 'reserved' (pseudo-static) and BOOTP leases via failover | |
1066 | was introduced. | |
1067 | ||
1068 | - Support for adding, removing, and managing class and subclass statements | |
1069 | via OMAPI. | |
1070 | ||
1071 | - The failover implementation was updated to comply with revision 12 of | |
1072 | the protocol draft. | |
1073 | ||
1074 | - 'make install' now creates the initial zero-length dhcpd.leases file if | |
1075 | one does not already exist on the system. | |
1076 | ||
1077 | - RFC3942 compliance, site-local option spaces start at 224 now, not 128. | |
1078 | ||
1079 | - The Load Balance Algorithm was misimplemented. The current implementation | |
1080 | matches RFC 3074. | |
1081 | ||
1082 | - lcase() and ucase() configuration expressions have been added which adjust | |
1083 | their arguments from upper to lower and lower to upper cases respectively. | |
1084 | Thanks to a patch from Albert Herranz. | |
1085 | ||
1086 | - The dhclient 'reject ...;' statement, which rejects leases given by named | |
1087 | server-identifiers, now permits address ranges to be specified in CIDR | |
1088 | notation. Thanks to a patch from David Boyce. | |
1089 | ||
1090 | - The subnet-mask option is now supplied by default, but at lowest | |
1091 | priority. This helps a small minority of clients that provide parameter | |
1092 | request lists, but do not list the subnet-mask option because they were | |
1093 | designed to interoperate with a server that behaves in this manner. | |
1094 | ||
1095 | - The FQDN option is similarly supplied even if it does not appear on the | |
1096 | parameter request list, but not to the exclusion of options that do | |
1097 | appear at the parameter request list. Up until now it had ultimate | |
1098 | priority over the client's parameter request list. | |
1099 | ||
1100 | - Varying option space code and length bit widths (8/16/32) are now | |
1101 | supported. This is a milestone in achieving RFC 3925 "VIVSO" and | |
1102 | DHCPv6 support. | |
1103 | ||
1104 | - A new common (server or client) option, 'db-time-format local;', has | |
1105 | been added which prints the local time in /var/db/dhcpd.leases rather | |
1106 | than UTC. Thanks to a patch from Ken Lalonde. | |
1107 | ||
1108 | - Some patches to improve DHCP Server startup speed from Andrew Matheson | |
1109 | have been incorporated. | |
1110 | ||
1111 | - Failover pairs now implement 'MAC Affinity' on leases moving from the | |
1112 | active to free states. Leases that belonged to the failover secondary | |
1113 | are moved to BACKUP state rather than FREE upon exiting EXPIRED state. | |
1114 | If lease rebalancing must move leases, it tries first to move leases | |
1115 | that belong to the peer in need. | |
1116 | ||
1117 | - The server no longer sends POOLREQ messages unless the pool is severely | |
1118 | misbalanced in the peer's favor (see 'man dhcpd.conf' for more details). | |
1119 | ||
1120 | - Pool rebalance events no longer happen upon successfully allocating a | |
1121 | lease. Instead, they happen on a schedule. See 'man dhcpd.conf' for the | |
1122 | min-balance and max-balance statements for more information. | |
1123 | ||
1124 | - The DHCP Relay Agent Information Option / Link Selection Sub-Option | |
1125 | is now supported. (See RFC3527 for details). | |
1126 | ||
1127 | - A new DDNS related server option, update-conflict-detection, has been | |
1128 | added. If this option is enabled, dhcpd will perform normal DHCID | |
1129 | conflict resolution (the default). If this option is disabled, it will | |
1130 | instead trust the assigned name implicitly (removing any other bindings | |
1131 | on that name). This option has not been made available in dhclient. | |
1132 | ||
1133 | - In those cases where the DHCP software manufactures an IP header (to | |
1134 | transmit via bpf, lpf, etc), the IP TTL the software selects has been | |
1135 | increased from 16 to 128. This is intended to match Microsoft Windows | |
1136 | DHCP Client behaviour, to increase compatibility. | |
1137 | ||
1138 | - 'ignore client-updates;' now has behaviour that is different from | |
1139 | 'deny client-updates;'. The client's request is not truly ignored, | |
1140 | rather it is encouraged. Should this value be configured, the server | |
1141 | updates DNS as though client-updates were set to 'deny'. That is, it | |
1142 | enters into DNS whatever it is configured to do already, provided it is | |
1143 | configured to. Then it sends a response to the client that lets the | |
1144 | client believe it is performing client updates (which it will), probably | |
1145 | for a different name. In essence, this lets the client do as it will, | |
1146 | ignoring this aspect of their request. | |
1147 | ||
1148 | - Support for compressed 'domain name list' style DHCP option contents, and | |
1149 | in particular the domain search option (#119) was added. | |
1150 | ||
1151 | - The DHCP LEASEQUERY protocol as defined in RFC4388 is now implemented. | |
1152 | LEASEQUERY lets you query the DHCP server for information about a lease, | |
1153 | using either an IP address, MAC address, or client identifier. Thanks | |
1154 | to a patch from Justin Haddad. | |
1155 | ||
1156 | - DHCPD is now RFC2131 section 4.1 compliant (broadcast to all-ones ip and | |
1157 | ethernet mac address) on the SCO platform specifically without any strange | |
1158 | ifconfig hacks. Many thanks go to the Kroger Co. for donating the | |
1159 | hardware and funding the development. | |
1160 | ||
1161 | - A new common configuration executable statement, execute(), has been | |
1162 | added. This permits dhcpd or dhclient to execute a named external | |
1163 | program with command line arguments specified from other configuration | |
1164 | language. Thanks to a patch written by Mattias Ronnblom, gotten to us | |
1165 | via Robin Breathe. | |
1166 | ||
1167 | - A new dhcp server option 'adaptive-lease-time-threshold' has been added | |
1168 | which causes the server to substantially reduce lease-times if there are | |
1169 | few (configured percentage) remaining leases. Thanks to a patch submitted | |
1170 | from Christof Chen. | |
1171 | ||
1172 | - Encapsulated option spaces within encapsulated option spaces is now | |
1173 | formally supported. | |
1174 | ||
1175 | Changes since 3.0.6rc1 | |
1176 | ||
1177 | - supersede_lease() now requeues leases in their respective hardware | |
1178 | address hash bucket. This mirrors client identifier behaviour. | |
1179 | ||
1180 | Changes since 3.0.5 | |
1181 | ||
1182 | - Assorted fixes for broken network devices: Packet length is now | |
1183 | determined from the IP header length field to finally calculate the | |
1184 | UDP payload length, because some NIC drivers return more data than | |
1185 | they actually received. | |
1186 | ||
1187 | - UDP packets are now stored in aligned data structures. | |
1188 | ||
1189 | - A logic error in omapi interface code was repaired that might result in | |
1190 | incorrectly indicating 'up' state when any flags were set, rather than | |
1191 | specifically the INTERFACE_REQUESTED flag. Thanks to a patch from | |
1192 | Jochen Voss which got to us via Andrew Pollock at Debian. | |
1193 | ||
1194 | - A reference leak on binding scopes set by ddns updates was repaired. | |
1195 | ||
1196 | - A memory leak in the minires_nsendsigned() function call was repaired. | |
1197 | Effectively, this leaked ~176 bytes per DDNS update. | |
1198 | ||
1199 | - In the case where an "L2" DHCP Relay Agent (one that does not set giaddr) | |
1200 | was directly attached to the same broadcast domain as the DHCP server, | |
1201 | the RFC3046 relay agent information option was not being returned to the | |
1202 | relay in the server's replies. This was fixed; the dhcp server no longer | |
1203 | requires the giaddr to reply with relay agent information. Note that | |
1204 | this also improves compatibility with L2 devices that "intercept" DHCP | |
1205 | packets and expect relay agent information even in unicast (renewal) | |
1206 | replies. Thanks to a patch from Pekka Silvonen. | |
1207 | ||
1208 | - A bug was fixed where the BOOTP header 'sname' field had a value, the | |
1209 | copy written to persistent storage was actually the contents of the | |
1210 | 'file' field. | |
1211 | ||
1212 | - A bug was fixed where the nwip virtual option space was referencing | |
1213 | the fqdn option's virtual option space's option cache. | |
1214 | ||
1215 | - Timestamp parsing errors that indicated missing "minutes" fields rather | |
1216 | than the actually missing "seconds" fields have been repaired thanks to | |
1217 | a patch from Kevin Steves. | |
1218 | ||
1219 | - A grammar error in the dhclient.8 manpage was repaired thanks to a patch | |
1220 | from Chris Wagner. | |
1221 | ||
1222 | - Several spelling typos were repaired, and some cross-references to other | |
1223 | relevant documents were included in the manpages, thanks to a patch | |
1224 | by Andrew Pollock which got to us via Tomas Pospisek. | |
1225 | ||
1226 | - Some bugs were fixed in the 'emergency relay agent options hologram' | |
1227 | which is used to retain relay agent option contents from when the | |
1228 | client was in INIT or REBIND states. This should solve problems where | |
1229 | relay agent options were not echoed from the server, even when giaddr | |
1230 | was set. | |
1231 | ||
1232 | - dhclient now closes its descriptor to dhclient.leases prior to executing | |
1233 | dhclient-script. Thanks to a patch from Tomas Pospisek. | |
1234 | ||
1235 | - The server's "by client-id" and "by hardware address" hash table lists | |
1236 | are now sorted according to the preference to re-allocate that lease to | |
1237 | returning clients. This should eliminate pool starvation problems | |
1238 | arising when "INIT" clients were given new leases rather than presently | |
1239 | active ones. | |
1240 | ||
1241 | Changes since 3.0.5rc1 | |
1242 | ||
1243 | - A bug was repaired in fixes to the dhclient, which sought to run the | |
1244 | dhclient-script with the 'EXPIRE' state should it receive a NAK in | |
1245 | response to a REQUEST. The client now iterates the PREINIT state | |
1246 | after the EXPIRE state, so that interfaces that might be configured | |
1247 | 'down' can be brought back 'up' and initialized. | |
1248 | ||
1249 | - DHCPINFORM handling for clients that properly set ciaddr and come to the | |
1250 | server via a relay aget has been repaired. | |
1251 | ||
1252 | Changes since 3.0.4 | |
1253 | ||
1254 | - A warning that host statements declared within subnet or shared-network | |
1255 | scopes are actually global has been added. | |
1256 | ||
1257 | - The default minimum lease time (if min-lease-time was not specified) | |
1258 | was raised from 0 to 300. 0 is not thought to be sensible, and is | |
1259 | known to be damaging. | |
1260 | ||
1261 | - Added additional fatal error sanity checks surrounding lease binding | |
1262 | state count calculations (free/active counts used for failover pool | |
1263 | balancing). | |
1264 | ||
1265 | - Some time value size fixes in 3.0.4 brought on from FreeBSD /usr/ports were | |
1266 | misapplied to server values rather than client values. The server no longer | |
1267 | advertises 8-byte lease-time options when on 64-bit platforms. | |
1268 | ||
1269 | - A bug where leases not in ACTIVE state would get billed to billed classes | |
1270 | (classes with lease limitations) was fixed. Non-active leases OFFERed | |
1271 | to clients are no longer billed (but billing is checked before offering). | |
1272 | ||
1273 | - The dhcpd.conf.5 manpage was updated in regard to the ddns-domainname | |
1274 | configuration option - the default configuration and results should be | |
1275 | more clear now. | |
1276 | ||
1277 | - If the dhclient were to receive a DHCPNAK while it was in the RENEW | |
1278 | state (and consequently, had an active, 'bound' address and related | |
1279 | configuration options), it would fail to 'tear down' this information | |
1280 | before proceeding into INIT state. dhclient now iterates the dhclient- | |
1281 | script with the 'EXPIRE' action to cause these teardowns prior to entering | |
1282 | INIT state. Thanks to a patch from Chris Zimmerman. | |
1283 | ||
1284 | - The omapi.1 manpage had some formatting errors repaired thanks to a patch | |
1285 | from Yoshihiko Sarumaru. | |
1286 | ||
1287 | - A few lines of code that were failover-specific were moved within | |
1288 | #if defined() clauses so that compilation without failover could be | |
1289 | made possible. | |
1290 | ||
1291 | - The log message emitted when the 'leased-address' value was not available | |
1292 | in dhcpd.conf "executable statements" has been updated to be more helpful. | |
1293 | Manpage information for this value has also been updated. | |
1294 | ||
1295 | - Abandoned or dissociated (err condition) leases now remove any related | |
1296 | dynamic dns bindings. Thanks to a patch from Patrick Schoo. | |
1297 | ||
1298 | - Attempting to write a new lease file to replace a corrupt (due to | |
1299 | encountering non-retryable errors during writing) lease file should | |
1300 | no longer result in an infinite recursion. | |
1301 | ||
1302 | - Host declaration hardware addresses and client identifiers may only be | |
1303 | configured once. dhcpd will now fail to load config files that specify | |
1304 | multiple identifiers (previous versions would silently over-ride the | |
1305 | value with the later configured value). | |
1306 | ||
1307 | - Several option codes that have been allocated since our last release | |
1308 | have been named and documented. | |
1309 | ||
1310 | - Option names of the form "unknown-123" have been removed from the in- | |
1311 | memory hash tables. In order to support options of these names that | |
1312 | may appear in dhclient.leases or similar in previous versions, the | |
1313 | parser will now find the new option code definition, or mock up a | |
1314 | generic option code definition. This should result in a smooth | |
1315 | transition from one name to the other, as the new name is used to | |
1316 | write new output. | |
1317 | ||
1318 | Changes since 3.0.4rc1 | |
1319 | ||
1320 | - The dhcp-options.5 manpage was updated to correct indentation errors | |
1321 | thanks to a patch from Jean Delvare. | |
1322 | ||
1323 | Changes since 3.0.4b3 | |
1324 | ||
1325 | - Some manual pages were clarified pursuant to discussion on the dhcp-server | |
1326 | mailing list. | |
1327 | ||
1328 | Changes since 3.0.4b2 | |
1329 | ||
1330 | - Null-termination sensing for certain clients that unfortunately require | |
1331 | it in DHCPINFORM processing was repaired. | |
1332 | ||
1333 | - The host-name option and a few others were moved from "X" format to "t" | |
1334 | format to be compatible with new NULL handling functions. | |
1335 | ||
1336 | - DHCPINFORM processing is a little more careful about return addressing | |
1337 | its responses, or if responding via a relay. The INFORM related | |
1338 | messages also log the 'effective client ip address' rather than the | |
1339 | client's supplied ciaddr (since some clients produce null ciaddrs). | |
1340 | ||
1341 | - The server was inappropriately sending leases to the RESET state in the | |
1342 | event that multiple active leases were found to match a singly-identified | |
1343 | client. This was changed to RELEASED (by accepting a different, ACTIVE | |
1344 | binding, the client is implicitly releasing its lease). This repairs a | |
1345 | bug wherein secondary servers in failover pairs detecting this condition | |
1346 | move leases to RESET, and primaries refuse to accept that state | |
1347 | transition (properly). | |
1348 | ||
1349 | - The memset-after-dmalloc() changes made in 3.0.4b1 have been backed out. | |
1350 | ||
1351 | Changes since 3.0.4b1 | |
1352 | ||
1353 | - Command line parsing in omshell was repaired - it no longer closes | |
1354 | STDIN after reading one line. | |
1355 | ||
1356 | - The resolver library no longer closes the /etc/resolv.conf file | |
1357 | descriptor it opened twice. | |
1358 | ||
1359 | - Changes to trailing NULL removal in 't' option-atoms has been rethought, | |
1360 | it now includes 'd' (domain name) types, and tries hard not to rewind an | |
1361 | option beyond the start of the text field it is un-terminating. | |
1362 | ||
1363 | Changes since 3.0.3 | |
1364 | ||
1365 | - A DDNS update handling function was misusing the DNS error codes, rather | |
1366 | than the internal generic result enumeration. The result is a confusing | |
1367 | syslog line, logging the wrong condition. | |
1368 | ||
1369 | - The DHCP Server was not checking pool balance in the case where it brought | |
1370 | a non-ACTIVE lease out of storage for a client that was returning to use | |
1371 | a lease it once had long ago, and had since expired. | |
1372 | ||
1373 | - Failover peers no longer bother to look for free leases to allocate when | |
1374 | they already found the client's ACTIVE lease. DISCOVERs are load balanced | |
1375 | whether freely-allocated or not, unless the server doubts the peer has | |
1376 | leases to allocate. | |
1377 | ||
1378 | - Fixed a bug in dhcrelay agent addition code that suppressed trailing | |
1379 | PAD options - it was suppressing only one trailing PAD option, rather | |
1380 | than the entire block of them. | |
1381 | ||
1382 | ! Fixed some unlikely overlapping-region memcpy() bugs in dhcrelay agent | |
1383 | option addition and stripping code. Added a few sanity checks. Although | |
1384 | highly improbable, due to requiring the reception of a DHCP datagram well | |
1385 | in excess of all known to be used physical MTU limitations, it is possible | |
1386 | this may have been used in a stack overflow security vulnerability. Thanks | |
1387 | to a patch from infamous42md. | |
1388 | ||
1389 | ! Added some sanity checks to OMAPI connection/authentication code. | |
1390 | Although highly improbable, due to having to deliver in excess of 2^32 | |
1391 | bytes of data via the OMAPI channel, not to mention requiring dhcpd to | |
1392 | be able to malloc() a memory region 2^32 bytes in size, it was possible | |
1393 | this might have resulted in a heap overflow security vulnerability. | |
1394 | Thanks to a patch from infamous42md. | |
1395 | ||
1396 | - dmalloc() memset()'s the non-debug (data) portion of the allocated | |
1397 | memory to zero. Code that memset()'s the result returned by dmalloc() to | |
1398 | zero is redundant. These redundancies were removed. | |
1399 | ||
1400 | - Some type declaration corrections to u_int16_t were made in common/tr.c | |
1401 | (Token Ring support) thanks to a patch from Jason Vas Dias at Red Hat. | |
1402 | ||
1403 | - A failover bug that was allowing leases that EXPIRED or were RELEASED | |
1404 | where tsfp and tstp are identical timestamps to languish in these | |
1405 | transitional states has been repaired. As a side effect, lease | |
1406 | databases should be kept more consistent overall, not just for these | |
1407 | transitional states. | |
1408 | ||
1409 | - If the lease db is deleted out from under the daemon, and it moves to rewrite | |
1410 | the db, it will go ahead with the operation and move the new db into place | |
1411 | once it detects the old db does not exist. | |
1412 | ||
1413 | - dhclient now ignores IRDA, SIT, and IEEE1394 network interfaces, as it | |
1414 | is either nonsensical or (in the case of IEEE1394) is not known to support | |
1415 | these interfaces. Thanks to Marius Gedminas and Andrew Pollock of Debian. | |
1416 | ||
1417 | - Some previously undocumented reasons for dhclient-script invoking has | |
1418 | been documented in the dhclient-script.8 manpage. | |
1419 | ||
1420 | - Failover potential expiry calculations (TSTP) have been corrected. Results | |
1421 | should be substantially more consistent, and proper given the constraints. | |
1422 | ||
1423 | - Adjusted lease state validation checks in potential-conflict, to | |
1424 | account for possible clock skew similarly to normal state, and several | |
1425 | previously illegal transitions were made legal (ex: active->released). | |
1426 | ||
1427 | - An impossible sanity check was removed from omapi/buffer.c, thanks to a | |
1428 | patch from 'infamous42md'. | |
1429 | ||
1430 | - An OMAPI host/network byte order problem in lease time values has been | |
1431 | repaired. | |
1432 | ||
1433 | - Several minor bugs, largely relating to treating 8-byte time values as | |
1434 | 4-byte entities, have been repaired after careful review of the FreeBSD | |
1435 | ports collection's patch set. Thanks to the nameless entities who have | |
1436 | contributed to the FreeBSD ports. | |
1437 | ||
1438 | - When writing a trace file, the file is now created with permissions 0600, | |
1439 | to help administrators avoid accidentally publicising sensitive config | |
1440 | data. | |
1441 | ||
1442 | - The calculation of the maximum size of DHCP packets no longer includes | |
1443 | Ethernet framing overhead. The result is that the 'Maximum Message | |
1444 | Size' option advertised by clients, or the default value 576, is no | |
1445 | longer reduced by 14 bytes, and instead directly reflects the IP level | |
1446 | MTU (and the default, minimum allowed IP MTU of 576). | |
1447 | ||
1448 | - The special status of RELEASED/EXPIRED/RESET leases when a server | |
1449 | is operating in partner-down was fixed. It no longer requires a | |
1450 | lease be twice the MCLT beyond STOS to 'reallocate', and the expiry | |
1451 | event to turn these into FREE leases without peer acknowledgement | |
1452 | (after STOS+MCLT) has been repaired. | |
1453 | ||
1454 | - Compilation on older Solaris systems (lacking /usr/include/sys/int_types.h) | |
1455 | has been repaired. | |
1456 | ||
1457 | - "append"ing a string onto the end of a "t" type option (such as the | |
1458 | domain-name field) that had been improperly NULL-terminated by the | |
1459 | DHCP server will no longer result in a truncated string containing | |
1460 | only the option from the server, and not the expected appended value. | |
1461 | Thanks to a patch from Jason Vas Dias at Red Hat. | |
1462 | ||
1463 | - File handlers on configuration state (config files and lease dbs) should | |
1464 | be treated consistently, regardless of whether TRACING is defined or not. | |
1465 | ||
1466 | - The Linux build environment has had some minor improvements - better | |
1467 | sensing of 64-bit pointer sizes (only used for establishing an icmp_id), | |
1468 | and corrections to #if operators regarding LINUX_MAJOR should it ever | |
1469 | move to 3.[01].x. | |
1470 | ||
1471 | - The server now tries harder to survive the condition where it is unable | |
1472 | to open a new lease file to rewrite the lease state database. | |
1473 | ||
1474 | Changes since 3.0.3b3 | |
1475 | ||
1476 | - dhclient.conf documentation for interface {} was updated to reflect recent | |
1477 | discussion on the dhcp-hackers mailing list. | |
1478 | ||
1479 | - In response to reports that the software does not compile on GCC 4.0.0, | |
1480 | -Werror was removed from Makefile.conf for all platforms that used it. | |
1481 | We will address the true problem in a future release; this is a temporary | |
1482 | workaround. | |
1483 | ||
1484 | Changes since 3.0.3b2 | |
1485 | ||
1486 | - An error in code changes introduced in 3.0.3b2 was corrected, which caused | |
1487 | static BOOTP clients to receive random addresses. | |
1488 | ||
1489 | Changes since 3.0.3b1 | |
1490 | ||
1491 | - A bug was fixed in BOOTPREQUEST handling code wherein stale references to | |
1492 | host records would be left behind on leases that were not allocated to the | |
1493 | client currently booting (eg in the case where the host was denied booting). | |
1494 | ||
1495 | - The dhcpd.conf.5 manpage was updated to be more clear in regards to | |
1496 | multiple host declarations (thanks to Vincent McIntyre). 'Interim' style | |
1497 | dynamic updates were also retouched. | |
1498 | ||
1499 | Changes since 3.0.2 | |
1500 | ||
1501 | - A bug was fixed where a server might load balance a DHCP REQUEST to its | |
1502 | peer after already choosing not to load balance the preceding DISCOVER. | |
1503 | The peer cannot allocate the originating server's lease. | |
1504 | ||
1505 | - In the case where a secondary server lost its stable storage while the | |
1506 | primary was still in communications-interrupted, and came back online, | |
1507 | the lease databases would not be fully transferred to the secondary. | |
1508 | This was due to the secondary errantly sending an extra UPDREQ message | |
1509 | when the primary made its state transition to PARTNER-DOWN known. | |
1510 | ||
1511 | - The package will now compile cleanly in gcc 3.3 and 3.4. As a side effect, | |
1512 | lease structures will be 9 bytes smaller on all platforms. Thanks to | |
1513 | Jason Vas Dias at Red Hat. | |
1514 | ||
1515 | - Interface discovery code in DISCOVER_UNCONFIGURED mode is now | |
1516 | properly restricted to only detecting broadcast interfaces. Thanks | |
1517 | to a patch from Jason Vas Dias at Red Hat. | |
1518 | ||
1519 | - decode_udp_ip_header was changed so that the IP address was copied out | |
1520 | to a variable, rather than referenced by a pointer. This enforces 4-byte | |
1521 | alignment of the 32-bit IP address value. Thanks to a patch from Dr. | |
1522 | Peter Poeml. | |
1523 | ||
1524 | - An incorrect log message was corrected thanks to a patch from | |
1525 | Dr. Peter Poeml. | |
1526 | ||
1527 | - A bug in DDNS was repaired, where if the server's first DDNS action was | |
1528 | a DDNS removal rather than a DDNS update, the resolver library's | |
1529 | retransmit timer and retry timer was set to the default, implying a | |
1530 | 15 second timeout interval. Which is a little excessive in a synchronous, | |
1531 | single-threaded system. In all cases, ISC DHCP should now hold fast to | |
1532 | a 1-second timeout, trying only once. | |
1533 | ||
1534 | - The siaddr field was being improperly set to the server-identifier when | |
1535 | responding to DHCP messages. RFC2131 clarified the siaddr field as | |
1536 | meaning the 'next server in the bootstrap process', eg a tftp server. | |
1537 | The siaddr field is now left zeroed unless next-server is configured. | |
1538 | ||
1539 | - mockup_lease() could have returned in an error condition (or in the | |
1540 | condition where no fixed-address was found matching the shared | |
1541 | network) with stale references to a host record. This is probably not | |
1542 | a memory leak since host records generally never die anyway. | |
1543 | ||
1544 | - A bug was repaired where failover servers would let stale client identifiers | |
1545 | persist on leases that were reallocated to new clients not sending an id. | |
1546 | ||
1547 | - Binding scopes ("set var = value;") are now removed from leases allocated | |
1548 | by failover peers if the lease had expired. This should help reduce the | |
1549 | number of stale binding scopes on leases. | |
1550 | ||
1551 | - A small memory leak was closed involving client identifiers larger than | |
1552 | 7 bytes, and failover. | |
1553 | ||
1554 | - Configuring a subnet in dhcpd.conf with a subnet mask of 32 bits might | |
1555 | cause an internal function to overflow heap. Thanks to Jason Vas Dias | |
1556 | at Red Hat. | |
1557 | ||
1558 | - Some inconsistencies in treating numbers that the lexer parsed as 'NUMBER' | |
1559 | or 'NUMBER_OR_NAME' was repaired. Hexadecimal parsing is affected, and | |
1560 | should work better. | |
1561 | ||
1562 | - In several cases, parse warnings were being issued before the lexical | |
1563 | token had been advanced to the token whose value was causing an error... | |
1564 | causing parse warnings to claim the problem is on the wrong token. | |
1565 | ||
1566 | - Host declarations matching on client identifier for dynamic leases will | |
1567 | no longer match fixed-address host declarations (this is now identical | |
1568 | to behaviour for host records matching on hardware address). | |
1569 | ||
1570 | Changes since 3.0.2rc3 | |
1571 | ||
1572 | - A previously undocumented configuration directive, 'local-address', | |
1573 | was documented in the dhcpd.conf manpage. | |
1574 | ||
1575 | Changes since 3.0.2rc2 | |
1576 | ||
1577 | - Two variables introduced in 3.0.2b1 were used without being initialized | |
1578 | in the case where neither the FILE nor SNAME fields were available for | |
1579 | overloading. This was repaired. | |
1580 | ||
1581 | - A heretofore believed to be impossible corner case of the option | |
1582 | overloading implementation turned out to be possible ("Unable to sort | |
1583 | overloaded options after 10 tries."). The implementation was reworked | |
1584 | to consider the case of an option so large it would require more than | |
1585 | three chunks to fit. | |
1586 | ||
1587 | - Many other instances of variables being used without being initialized | |
1588 | were repaired. | |
1589 | ||
1590 | - An uninitialized variable in omapi_io_destroy() led to the discovery | |
1591 | that this function may result in orphaned pointers (and hence, a memory | |
1592 | leak). | |
1593 | ||
1594 | Changes since 3.0.2rc1 | |
1595 | ||
1596 | - allocate_lease() was rewritten to repair a bug in which the server would | |
1597 | try to allocate an ABANDONED lease when FREE leases were available. | |
1598 | ||
1599 | Changes since 3.0.2b1 | |
1600 | ||
1601 | - Some dhcp-eval.5 manpage formatting was repaired. | |
1602 | ||
1603 | Changes since 3.0.1 | |
1604 | ||
1605 | - A bug was fixed in the server's 'option overloading' implementation, | |
1606 | where options loaded into the 'file' and 'sname' packet fields were | |
1607 | not aligned precisely as rfc2131 dictates. | |
1608 | ||
1609 | - The FreeBSD client script was changed to support the case where a domain | |
1610 | name was not provided by the server. | |
1611 | ||
1612 | - A memory leak in 'omshell' per each command line parsed was | |
1613 | repaired, thanks to a patch from Jarkko Torppa. | |
1614 | ||
1615 | - Log functions writing to stderr were adjusted to use the STDERR_FILENO | |
1616 | system definition rather than '2'. This is a no-op for 90% of platforms. | |
1617 | ||
1618 | - One call to trace_write_packet_iov() counted the number of io vectors | |
1619 | incorrectly, causing inconsistent tracefiles. This was fixed. | |
1620 | ||
1621 | - Some expression parse failure memory leaks were closed. | |
1622 | ||
1623 | - A host byte order problem in tracefiles was repaired. | |
1624 | ||
1625 | - Pools configured in DHCPD for failover possessing permission lists that | |
1626 | previously were assumed to not include dyanmic bootp clients are now | |
1627 | a little more pessimistic. The result is, dhcpd will nag you about just | |
1628 | about most pools that possess a 'allow' statement with no 'deny' that | |
1629 | would definitely match a dynamic bootp client. | |
1630 | ||
1631 | - The 'ddns-update-style' configuration warning bit now insists that | |
1632 | the configuration be globally scoped. | |
1633 | ||
1634 | - Two memory leaks in dhclient were closed thanks to a patch from Felix | |
1635 | Farkas. | |
1636 | ||
1637 | - Some minor but excellently pedantic documentation errors were fixed | |
1638 | thanks to a patch from Thomas Klausner. | |
1639 | ||
1640 | - Bugs in operator precedence in executable statements have been repaired | |
1641 | once again. More legal syntaxes should be parsed legally. | |
1642 | ||
1643 | - Failing to initialize a tracefile for any reason if a tracefile was | |
1644 | specified is now a fatal error. Thanks to a patch from Albert Herranz. | |
1645 | ||
1646 | - Corrected a bug in which the number of leases transferred as calculated | |
1647 | by the failover primary and sent to peers in POOLRESP responses may be | |
1648 | incorrect. This value is not believed to be used by other failover | |
1649 | implementations, excepting perhaps as logged information. | |
1650 | ||
1651 | - Corrected a bug in which 'dhcp_failover_send_poolresp()' was in fact | |
1652 | sending POOLREQ messages instead of POOLRESP mesasges. This message | |
1653 | was essentially ignored since failover secondaries effectively do not | |
1654 | respond to POOLREQ messages. | |
1655 | ||
1656 | - Type definitions for various bitwidths of integers in the sunos5-5 | |
1657 | build of ISC DHCP have been fixed. It should compile and run more | |
1658 | easily when built in 64-bit for this platform. | |
1659 | ||
1660 | - "allow known-clients;" is now a legal syntax, to avoid confusion. | |
1661 | ||
1662 | - If one dhcp server chooses to 'load balance' a request to its failover | |
1663 | peer, it first checks to see if it believes said peer has a free | |
1664 | lease to allocate before ignoring the DISCOVER. | |
1665 | ||
1666 | - log() was logging a work buffer, rather than the value returned by | |
1667 | executing the statements configured by the user. In some cases, | |
1668 | the work buffer and the intended results were the same. In some other | |
1669 | cases, they were not. This was fixed thanks to a patch from Gunnar | |
1670 | Fjone and directconnect.no. | |
1671 | ||
1672 | - Compiler warnings for some string type conversions was fixed, thanks | |
1673 | to Andreas Gustafsson. | |
1674 | ||
1675 | - The netbsd build environments were simplified to one, in which | |
1676 | -Wconversion is not used, thanks to Andreas Gustafsson. | |
1677 | ||
1678 | - How randomness in the backoff-cutoff dhclient configuration variable | |
1679 | is implemented was better documented in the manpage, and the behaviour | |
1680 | of dhclient in REQUEST timeout handling was changed to match that of | |
1681 | DISCOVER timeout handling. | |
1682 | ||
1683 | - Omapi was hardened against clients that pass in null values, thanks | |
1684 | to a patch from Mark Jason Dominus. | |
1685 | ||
1686 | - A bug was fixed in dhclient that kept it from doing client-side | |
1687 | ddns updates. Thanks to a patch from Andreas Gustafsson, which | |
1688 | underwent some modification after review by Jason Vas Dias. | |
1689 | ||
1690 | - Failover implementations disconnected due to the network between | |
1691 | them (rather than one of the two shutting down) will now try to | |
1692 | re-establish the failover connection every 5 seconds, rather than | |
1693 | to simply try once and give up until one of them is restarted. | |
1694 | Thanks to a patch from Ulf Ekberg from Infoblox, and field testing | |
1695 | by Greger V. Teigre which led to an enhancement to it. | |
1696 | ||
1697 | - A problem that kept DHCP Failover secondaries from tearing down | |
1698 | ddns records was repaired. Thanks to a patch from Ulf Ekberg from | |
1699 | Infoblox. | |
1700 | ||
1701 | - 64bit pointer sizes are detected properly on FreeBSD now. | |
1702 | ||
1703 | - A bug was repaired where the DHCP server would leave stale references | |
1704 | to host records on leases it once thought about offering to certain | |
1705 | clients. The result would be to apply host and 'known' scopes to the | |
1706 | wrong clients (possibly denying booting). NOTE: The 'mis-host' patch | |
1707 | that was being circulated as a workaround is not the way this bug was | |
1708 | fixed. If you were a victim of this bug in 3.0.1, you are cautioned | |
1709 | to proceed carefully and see if it fixes your problem. | |
1710 | ||
1711 | - A bug was repaired in the server's DHCPINFORM handling, where it | |
1712 | tried to divine the client's address from the source packet and | |
1713 | would get it wrong. Thanks to Anshuman Singh Rawat. | |
1714 | ||
1715 | - A log message was introduced to help illuminate the case where the | |
1716 | server was unable to find a lease to assign to any BOOTP client. | |
1717 | Thanks to Daniel Baker. | |
1718 | ||
1719 | - A minor dhcpd.conf.5 manpage error was fixed. | |
1720 | ||
1721 | Changes since 3.0.1rc14 | |
1722 | ||
1723 | - The global variable 'cur_time' was centralized and is now uniformly of a | |
1724 | type #defined in system-dependent headers. It had previously been defined | |
1725 | in one of many places as a 32-bit value, and this causes mayhem on 64-bit | |
1726 | big endian systems. It probably wasn't too healthy on little endian | |
1727 | systems either. | |
1728 | ||
1729 | - A printf format string error introduced in rc14 was repaired. | |
1730 | ||
1731 | - AIX system-dependent header file was altered to only define NO_SNPRINTF | |
1732 | if the condition used to #ifdef in vsnprintf in AIX' header files | |
1733 | is false. | |
1734 | ||
1735 | - The Alpha/OSF system-dependent header file was altered to define | |
1736 | NO_SNPRINTF on OS revisions older than 4.0G. | |
1737 | ||
1738 | - omapip/test.c had string.h added to its includes. | |
1739 | ||
1740 | Changes since 3.0.1rc13 | |
1741 | ||
1742 | ! CAN-2004-0460 - CERT VU#317350: Five stack overflow exploits were closed | |
1743 | in logging messages with excessively long hostnames provided by the | |
1744 | clients. It is highly probable that these could have been used by | |
1745 | attackers to gain arbitrary root access on systems using ISC DHCP 3.0.1 | |
1746 | release candidates 12 or 13. Special thanks to Gregory Duchemin for | |
1747 | both finding and solving the problem. | |
1748 | ||
1749 | ! CAN-2004-0461 - CERT VU#654390: Once the above was closed, an opening | |
1750 | in log_*() functions was evidenced, on some specific platforms where | |
1751 | vsnprintf() was not believed to be available and calls were wrapped to | |
1752 | sprintf() instead. Again, credit goes to Gregory Duchemin for finding | |
1753 | the problem. Calls to snprintf() are now linked to a distribution-local | |
1754 | snprintf implementation, only in those cases where the architecture is | |
1755 | not known to provide one (see includes/cf/[arch].h). If you experience | |
1756 | linking problems with snprintf/vsnprintf or 'isc_print_' functions, this | |
1757 | is where to look. This vulnerability did not exist in any previously | |
1758 | published version of ISC DHCP. | |
1759 | ||
1760 | - Compilation on hpux 11.11 was repaired. | |
1761 | ||
1762 | - 'The cross-compile bug fix' was backed out. | |
1763 | ||
1764 | Changes since 3.0.1rc12 | |
1765 | ||
1766 | - Fixed a bug in omapi lease lookup function, to form the hardware | |
1767 | address for the hash lookup correctly, thanks to a patch from | |
1768 | Richard Hirst. | |
1769 | ||
1770 | - Fixed a bug where dhcrelay was sending relayed responses back to the | |
1771 | broadcast address, but with the source's unicast mac address. Should | |
1772 | now conform to rfc2131 section 4.1. | |
1773 | ||
1774 | - Cross-compile bug fix; use $(AR) instead of ar. Thanks to Morten Brorup. | |
1775 | ||
1776 | - Fixed a crash bug in dhclient where dhcpd servers that do not provide | |
1777 | renewal times results in an FPE. As a side effect, dhclient can now | |
1778 | properly handle 0xFFFFFFFF (-1) expiry times supplied by servers. Thanks | |
1779 | to a patch from Burt Silverman. | |
1780 | ||
1781 | - The 'ping timeout' debugs from rc12 were removed to -DDEBUG only, | |
1782 | and reformatted to correct a compilation error on Solaris platforms. | |
1783 | ||
1784 | - A patch was applied which fixes a case where leases read from the | |
1785 | leases database do not properly over-ride previously read leases. | |
1786 | ||
1787 | - dhcpctl.3 manpage was tweaked. | |
1788 | ||
1789 | Changes since 3.0.1rc11 | |
1790 | ||
1791 | - A patch from Steve Campbell was applied with minor modifications to | |
1792 | permit reverse dns PTR record updates with values containing spaces. | |
1793 | ||
1794 | - A patch from Florian Lohoff was applied with some modifications to | |
1795 | dhcrelay. It now discards packets whose hop count exceeds 10 by default, | |
1796 | and a command-line option (-c) can be used to set this threshold. | |
1797 | ||
1798 | - A failover bug relating to identifying peers by name length instead of | |
1799 | by name was fixed. | |
1800 | ||
1801 | - Declaring failover configs within shared-network statements should no | |
1802 | longer result in error. | |
1803 | ||
1804 | - The -nw command line option to dhclient now works. | |
1805 | ||
1806 | - Thanks to a patch from Michael Richardson: | |
1807 | - Some problems with long option processing have been fixed. | |
1808 | - Some fixes to minires so that updates of KEY records will work. | |
1809 | ||
1810 | - contrib/ms2isc was updated by Shu-Min Chang of the Intel Corporation. | |
1811 | see contrib/ms2isc/readme.txt for revision notes. | |
1812 | ||
1813 | - Dhclient no longer uses shell commands to kill another instance of | |
1814 | itself, it sends the signal directly. Thanks to a patch from Martin | |
1815 | Blapp. | |
1816 | ||
1817 | - The FreeBSD dhclient-script was changed so that a failure to write to | |
1818 | /etc/resolv.conf does not prematurely end the script. This keeps dhclient | |
1819 | from looping infinitely when this is the case. Thanks to a patch from | |
1820 | Martin Blapp. | |
1821 | ||
1822 | - A patch from Bill Stephens was applied which resolves a problem with lease | |
1823 | expiry times in failover configurations. | |
1824 | ||
1825 | - A memory leak in configuration parsing was closed thanks to a patch from | |
1826 | Steve G. | |
1827 | ||
1828 | - The function which discovers interfaces will now skip non-broadcast or | |
1829 | point-to-point interfaces, thanks to a patch from David Brownlee. | |
1830 | ||
1831 | - Options not yet known by the dhcpd or dhclient have had their names | |
1832 | changed such that they do not contain # symbols, in case they should ever | |
1833 | appear in a lease file. An option that might have been named "#144" is | |
1834 | now "unknown-144". | |
1835 | ||
1836 | - Another patch from Bill Stephens which allows the ping-check timeout to | |
1837 | be configured as 'ping-timeout'. Defaults to 1. | |
1838 | ||
1839 | Changes since 3.0.1rc10 | |
1840 | ||
1841 | - Potential buffer overflows in minires repaired. | |
1842 | ||
1843 | - A change to the linux client script to use /bin/bash, since /bin/sh may | |
1844 | not be bash. | |
1845 | ||
1846 | - Some missing va_end cleanups thanks to a patch from Thomas Klausner. | |
1847 | ||
1848 | - A correction of boolean parsing syntax validation - some illegal syntaxes | |
1849 | that worked before are now detected and produce errs, some legal syntaxes | |
1850 | that errored before will now work properly. | |
1851 | ||
1852 | - Some search-and-replace errors that caused some options to change their | |
1853 | names was repaired. | |
1854 | ||
1855 | - Shu-min Chang of the Intel corporation has contributed a perl script and | |
1856 | module that converts the MS NT4 DHCP configuration to a ISC DHCP3 | |
1857 | configuration file. | |
1858 | ||
1859 | - Applied the remainder of the dhcpctl memory leak patch provided by Bill | |
1860 | Squier at ReefEdge, Inc. (groo@reefedge.com). | |
1861 | ||
1862 | - Missing non-optional failover peer configurations will now result in a soft | |
1863 | error rather than a null dereference. | |
1864 | ||
1865 | Changes since 3.0.1rc9 | |
1866 | ||
1867 | - A format string was corrected to fix compiler warnings. | |
1868 | ||
1869 | - A number of spelling corrections were made in the man pages. | |
1870 | ||
1871 | - The dhclient.conf.5 man page was changed to refer to do-forward-updates | |
1872 | rather than a configuration option that doesn't exist. | |
1873 | ||
1874 | - A FreeBSD-specific bug in the interface removal handling was fixed. | |
1875 | ||
1876 | - A Linux-specific Token Ring detection problem was fixed. | |
1877 | ||
1878 | - Hashes removed from as-yet-unknown agent options, having those options | |
1879 | appear in reality before we know about them will no longer produce | |
1880 | self-corrupting lease databases. | |
1881 | ||
1882 | - dhclient will use the proper port numbers now when using the -g option. | |
1883 | ||
1884 | - A order-of-operations bug with 2 match clauses in 1 class statement is | |
1885 | fixed thanks to a patch from Andrew Matheson. | |
1886 | ||
1887 | - Compilation problems on Solaris were fixed. | |
1888 | ||
1889 | - Compilation problems when built with DEBUG or DEBUG_PACKET were repaired. | |
1890 | ||
1891 | - A fix to the dhcp ack process which makes certain group options will be | |
1892 | included in the first DHCPOFFER message was made thanks to a patch from | |
1893 | Ling Gou. | |
1894 | ||
1895 | - A few memory leaks were repaired thanks to patches from Bill Squier at | |
1896 | ReefEdge, Inc. (groo@reefedge.com). | |
1897 | ||
1898 | - A fix for shared-networks that sometimes give clients options for the | |
1899 | wrong subnets (in particular, 'option routers') was applied, thanks to | |
1900 | Ted Lemon for the patch. | |
1901 | ||
1902 | - Omshell's handling of dotted octets as values was changed such that dots | |
1903 | one after the other produce zero values in the integer string. | |
1904 | ||
1905 | Changes since 3.0.1rc8 | |
1906 | ||
1907 | - Fix a format string vulnerability in the server that could lead to a | |
1908 | remote root compromise (discovered by NGSEC Research Team, www.ngsec.com). | |
1909 | ||
1910 | - Add additional support for NetBSD/sparc64. | |
1911 | ||
1912 | - Fix a bug in the command-line parsing of the client. Also, resolve | |
1913 | a memory leak. | |
1914 | ||
1915 | - Add better support for shells other than bash in the Linux client | |
1916 | script. | |
1917 | ||
1918 | - Various build fixes for modern versions of FreeBSD and Linux. | |
1919 | ||
1920 | - Fix a bad bounds check when printing binding state names. | |
1921 | ||
1922 | - Clarify documentation about fixed-address and multiple addresses. | |
1923 | ||
1924 | - Fix a typo in the authoritative error message. | |
1925 | ||
1926 | - Make a log entry when we can't write a billing class. | |
1927 | ||
1928 | - Use conversion targets that are the right size on all architectures. | |
1929 | ||
1930 | - Increment the hop count when relaying. | |
1931 | ||
1932 | - Log a message when lease state is changed through OMAPI. | |
1933 | ||
1934 | - Don't rerun the shared_network when evaluating the pool. | |
1935 | ||
1936 | - Fix a reversed test in the parser. | |
1937 | ||
1938 | - Change the type of rbuf_max. | |
1939 | ||
1940 | - Make FTS_LAST a manifest constant to quiet warnings. | |
1941 | ||
1942 | Changes since 3.0.1rc7 | |
1943 | ||
1944 | - Fix two compiler warnings that are generated when compiling on Solaris | |
1945 | with gcc. These stop the build, even though they weren't actually | |
1946 | errors, because we prefer that our builds generate no warnings. | |
1947 | ||
1948 | Changes since 3.0.1rc6 | |
1949 | ||
1950 | - Don't allow a lease that's in the EXPIRED, RELEASED or RESET state | |
1951 | to be renewed. | |
1952 | ||
1953 | - Implement lease stealing for cases where the primary has fewer leases | |
1954 | than the secondary, as called for by the standard. | |
1955 | ||
1956 | - Add a fudge factor to the lease expiry acceptance code, (suggested | |
1957 | by Kevin Miller of CMU). | |
1958 | ||
1959 | - Fix a bug in permit_list_match that made it much too willing to say | |
1960 | that two permit lists matched. | |
1961 | ||
1962 | - Unless DEBUG_DNS_UPDATES is defined, print more user-friendly (and | |
1963 | also more compact) messages about DNS updates. | |
1964 | ||
1965 | - Fix a bug in generating wire-format domain names for the FQDN option. | |
1966 | ||
1967 | - Fix a bug where the FQDN option would not be returned if the client | |
1968 | requested it, contrary to the standard. | |
1969 | ||
1970 | - On Darwin, use the FreeBSD DHCP client script. | |
1971 | ||
1972 | - On NetBSD/sparc, don't check for casting warnings. | |
1973 | ||
1974 | - Add a flag in the DHCP client to disable updating the client's A | |
1975 | record when sending an FQDN option indicating that the client is | |
1976 | going to update its A record. | |
1977 | ||
1978 | - In the client, don't attempt a DNS update until one second after | |
1979 | configuring the new IP address, and if the update times out, keep | |
1980 | trying until a response, positive or negative, is received from the | |
1981 | DNS server. | |
1982 | ||
1983 | - Fix an uninitialized memory bug in the DHCP client. | |
1984 | ||
1985 | - Apply some FreeBSD-specific bug fixes suggested by Murray Stokely. | |
1986 | ||
1987 | - Fix a bug in ns_parserr(), where it was returning the wrong sort | |
1988 | of result code in some cases (suggested by Ben Harris of the | |
1989 | NetBSD project). | |
1990 | ||
1991 | - Fix a bug in is_identifier(), where it was checking against EOF | |
1992 | instead of the END_OF_FILE token (also suggested by Ben Harris). | |
1993 | ||
1994 | - Fix a bug where if an option universe contained no options, the | |
1995 | DHCP server could dump core (Walter Steiner). | |
1996 | ||
1997 | - Fix a bug in the handling of encapsulated options. | |
1998 | ||
1999 | - Fix a bug that prevented NWIP suboptions from being processed. | |
2000 | ||
2001 | - Delete the FTS_BOOTP and FTS_RESERVED states and implement them | |
2002 | as modifier flags to the FTS_ACTIVE state, as called for in the | |
2003 | failover protocol standard. | |
2004 | ||
2005 | - Fix bugs in the pool merging code that resulted in references and | |
2006 | dereferences of null pointers. This bug had no impact unless the | |
2007 | POINTER_DEBUG flag was defined. | |
2008 | ||
2009 | - In the server, added a do-forward-updates flag that can be used to | |
2010 | disable forward updates in all cases, so that sites that want the | |
2011 | clients to take sole responsibility for updating their A record can | |
2012 | do so. | |
2013 | ||
2014 | - Make it possible to disable optimization of PTR record updates. | |
2015 | ||
2016 | Changes since 3.0.1rc5 | |
2017 | ||
2018 | - Include some new documentation and changes provided by Karl Auer. | |
2019 | ||
2020 | - Add a workaround for some Lexmark printers that send a double-NUL- | |
2021 | terminated host-name option, which would break DNS updates. | |
2022 | ||
2023 | - Fix an off-by-one error in the MAC-address checking code for | |
2024 | DHCPRELEASE that was added in 3.0.1rc5. | |
2025 | ||
2026 | - Fix a bug where client-specific information was not being discarded | |
2027 | from the lease when it expired or was released, resulting in | |
2028 | problems if the lease was reallocated to a different client. | |
2029 | ||
2030 | - If more than one allocation pool is specified that has the same set | |
2031 | of constraints as another allocation pool on the same shared | |
2032 | network, merge the two pools. | |
2033 | ||
2034 | - Don't print an error in fallback_discard, since this just causes | |
2035 | confusion and does not appear to be helping to encourage anyone to | |
2036 | fix this bug. | |
2037 | ||
2038 | Changes since 3.0.1rc4 | |
2039 | ||
2040 | - Fix a bug that would cause the DHCP server to spin if asked to parse | |
2041 | a certain kind of incorrect statement. | |
2042 | ||
2043 | - Fix a related bug that would prevent an error from being reported in | |
2044 | the same case. | |
2045 | ||
2046 | - Additional documentation. | |
2047 | ||
2048 | - Make sure that the hardware address matches the lease when | |
2049 | processing a DHCPRELEASE message. | |
2050 | ||
2051 | Changes since 3.0.1rc3 | |
2052 | ||
2053 | - A minor bug fix in the arguments to a logging function call. | |
2054 | - Documentation update for dhcpd.conf. | |
2055 | ||
2056 | Changes since 3.0.1rc2 | |
2057 | ||
2058 | - Allow the primary to send a POOLREQ message. This isn't what the current | |
2059 | failover draft says to do, so we may have to back it out if I can't get the | |
2060 | authors to relent, but the scheme for balancing that's specified in the | |
2061 | current draft seems needlessly hairy, so I'm floating a trial balloon. | |
2062 | The rc1 code did not implement the method described in the draft either. | |
2063 | ||
2064 | Changes since 3.0.1rc1 | |
2065 | ||
2066 | - Treat NXDOMAIN and NXRRSET as success when we are trying to delete a | |
2067 | domain or RRSET. This allows the DHCP server to forget about a name | |
2068 | it added to the DNS once it's been removed, even if the DHCP server | |
2069 | wasn't the one that removed it. | |
2070 | ||
2071 | - Install defaults for failover maximum outstanding updates and maximum | |
2072 | silent time. This prevents problems that might occur if these values | |
2073 | were not configured. | |
2074 | ||
2075 | - Don't do DDNS deletes if ddns-update-style is none. | |
2076 | ||
2077 | - Return relay agent information options in DHCPNAK. This prevents DHCPNAK | |
2078 | messages from being dropped when the relay agent information option contains | |
2079 | routing information. | |
2080 | ||
2081 | - Fix a problem where coming up in recover wouldn't result in an update | |
2082 | request being sent. | |
2083 | ||
2084 | - Add some more chatty messages when we start a recovery update and when it's | |
2085 | done. | |
2086 | ||
2087 | - Fix a possible problem where some state might have been left around | |
2088 | after the peer lost contact and regained contact about how many updates | |
2089 | were pending. | |
2090 | ||
2091 | - Don't nix a lease update because of a lease conflict. This test has | |
2092 | never (as far as I know) prevented a mistake, and it appears to cause | |
2093 | problems with failover. | |
2094 | ||
2095 | - Add support in rc history code for keeping a selective history, rather | |
2096 | than a history of all references and dereferences. This code is only used | |
2097 | when extensive additional debugging is enabled. | |
2098 | ||
2099 | Changes since 3.0 | |
2100 | ||
2101 | - Make allocators for hash tables. As a side effect, this fixes a memory | |
2102 | smash in the subclass allocation code. | |
2103 | ||
2104 | - Fix a small bug in omshell where if you try to close an object when | |
2105 | no object is open, it dumps core. | |
2106 | ||
2107 | - Fix an obscure coredump that could occur on shutdown. | |
2108 | ||
2109 | - Fix a bug in the recording of host declaration rubouts in the lease file. | |
2110 | ||
2111 | - Fix two potential spins in the host deletion code. | |
2112 | ||
2113 | - Fix a core dump that would happen if an application tried to update | |
2114 | a host object attribute with a null value. | |
2115 | ||
2116 | Changes since 3.0 Release Candidate 12 | |
2117 | ||
2118 | - Fix a memory leak in the evaluation code. | |
2119 | ||
2120 | - Fix an obscure core dump. | |
2121 | ||
2122 | - Print a couple of new warnings when parsing the configuration file | |
2123 | when crucial information is left out. | |
2124 | ||
2125 | - Log "no free leases" as an error. | |
2126 | ||
2127 | - Documentation updates. | |
2128 | ||
2129 | Changes since 3.0 Release Candidate 11 | |
2130 | ||
2131 | - Always return a subnet selection option if one is sent. | |
2132 | ||
2133 | - Fix a warning that was being printed because an automatic data | |
2134 | structure wasn't zeroed. | |
2135 | ||
2136 | - Fix some failover state transitions that were being handled | |
2137 | incorrectly. | |
2138 | ||
2139 | - When supersede_lease is called on a lease whose end time has already | |
2140 | expired, but for which a state transition has not yet been done, do | |
2141 | a state transition. This fixes the case where if the secondary | |
2142 | allocated a lease to a client and the lease "expired" while the | |
2143 | secondary was in partner-down, no expiry event would actually | |
2144 | happen, so the lease would remain active until the primary was | |
2145 | restarted. | |
2146 | ||
2147 | Changes since 3.0 Release Candidate 10 | |
2148 | ||
2149 | - Fix a bug that was preventing released leases from changing state | |
2150 | in failover-enabled pools. | |
2151 | ||
2152 | - Fix a core dump in the client identifier finder code (for host | |
2153 | declarations). | |
2154 | ||
2155 | - Finish fixing a bug where bogus data would sometimes get logged to | |
2156 | the dhclient.leases file because it was opened as descriptor 2. | |
2157 | ||
2158 | - Fix the Linux dhclient-script according to suggestions made by | |
2159 | several people on the dhcp-client mailing list. | |
2160 | ||
2161 | - Log successful DNS updates at LOG_INFO, not LOG_ERROR. | |
2162 | ||
2163 | - Print an error message and refuse to run if a failover peer is | |
2164 | defined but not referenced by any pools. | |
2165 | ||
2166 | - Correct a confusing error message in failover. | |
2167 | ||
2168 | Changes since 3.0 Release Candidate 9 | |
2169 | ||
2170 | - Fix a bug in lease allocation for Dynamic BOOTP clients. | |
2171 | ||
2172 | Changes since 3.0 Release Candidate 8 Patchlevel 2 | |
2173 | ||
2174 | - Fix a bug that prevented update-static-leases from working. | |
2175 | ||
2176 | - Document failover-state OMAPI object. | |
2177 | ||
2178 | - Fix a compilation error on SunOS 4. | |
2179 | ||
2180 | Changes since 3.0 Release Candidate 8 Patchlevel 1 | |
2181 | ||
2182 | - Fix a parsing bug that broke dns updates (both interim and ad-hoc). | |
2183 | This was introduced in rc8pl1 as an unintended result of the memory | |
2184 | leakage fixes that were in pl1. | |
2185 | ||
2186 | - Fix a long-standing bug where the server would record that an update | |
2187 | had been done for a client with no name, even though no update had | |
2188 | been done, and then when the client's lease expired the deletion of | |
2189 | that nonexistant record would time out because the name was the null | |
2190 | string. | |
2191 | ||
2192 | - Clean up the omshell, dhcpctl and omapi man pages a bit. | |
2193 | ||
2194 | Changes since 3.0 Release Candidate 8 | |
2195 | ||
2196 | - Fix a bug that could cause the DHCP server to spin if | |
2197 | one-lease-per-client was enabled. | |
2198 | ||
2199 | - Fix a bug that was causing core dumps on BSD/os in the presence of | |
2200 | malformed packets. | |
2201 | ||
2202 | - In partner-down state, don't restrict lease lengths to MCLT. | |
2203 | ||
2204 | - On the failover secondary, record the MCLT received from the primary | |
2205 | so that if we come up without a connection to the primary we don't | |
2206 | wind up giving out zero-length leases. | |
2207 | ||
2208 | - Fix some compilation problems on BSD/os. | |
2209 | ||
2210 | - Fix a bunch of memory leaks. | |
2211 | ||
2212 | - Fix a couple of bugs in the option printer. | |
2213 | ||
2214 | - Fix an obscure error reporting bug in the dns update code, and also | |
2215 | make the message clearer when a key algorithm isn't supported. | |
2216 | ||
2217 | - Fix a bug in the tracing code that prevented trace runs that used | |
2218 | tcp connections from being played back. | |
2219 | ||
2220 | - Add some additional debugging capability for catching memory leaks | |
2221 | on exit. | |
2222 | ||
2223 | - Make the client release the lease correctly on shutdown. | |
2224 | ||
2225 | - Add some configurability to the build system. | |
2226 | ||
2227 | - Install omshell manual page in man1, not man8. | |
2228 | ||
2229 | - Craig Gwydir sent in a patch that fixes a long-standing bug in the | |
2230 | DHCP client that could cause core dumps, but that for some reason | |
2231 | hadn't been noticed until now. | |
2232 | ||
2233 | Changes since 3.0 Release Candidate 7 | |
2234 | ||
2235 | - Fix a bug in failover where we weren't sending updates after a | |
2236 | transition from communications-interrupted to normal. | |
2237 | ||
2238 | - Handle expired/released/reset -> free transition according to the | |
2239 | protocol specification (this works - the other way not only wasn't | |
2240 | conformant, but also didn't work). | |
2241 | ||
2242 | - Add a control object in both client and server that allows either | |
2243 | daemon to be shut down cleanly. | |
2244 | ||
2245 | - When writing a lease, if we run out of disk space, shut down the | |
2246 | output file and insist on writing a new one before proceeding. | |
2247 | ||
2248 | - In the server, if the OMAPI listener port is occupied, keep trying | |
2249 | to get it, rather than simply giving up and exiting. | |
2250 | ||
2251 | - Support fetching variables from leases and also updating and adding | |
2252 | variables to leases via OMAPI. | |
2253 | ||
2254 | - If two failover peers have wildly different clocks, refuse to start | |
2255 | doing failover. | |
2256 | ||
2257 | - Fix a bug in the DNS update code that could cause core dumps when | |
2258 | running on alpha processors. | |
2259 | ||
2260 | - Fixed a bug in ddns updates for static lease entries, thanks to a | |
2261 | patch from Andrey M Linkevitch. | |
2262 | ||
2263 | - Add support for Darwin/MacOS X | |
2264 | ||
2265 | - Install omshell (including new documentation). | |
2266 | ||
2267 | - Support DNS updates in the client (this is a very obscure feature | |
2268 | that most DHCP client users probably will not be able to use). | |
2269 | ||
2270 | - Somewhat cleaner status logging in the client. | |
2271 | ||
2272 | - Make OMAPI key naming syntax compatible with the way keys are | |
2273 | actually named (key names are domain names). | |
2274 | ||
2275 | - Fix a bug in the lease file writer. | |
2276 | ||
2277 | - Install DHCP ISC headers in a different place than BIND 9 ISC | |
2278 | headers, to avoid causing trouble in BIND 9 builds. | |
2279 | ||
2280 | - Don't send updates for attributes on an object when the attributes | |
2281 | haven't changed. Support deleting attributes on remote objects. | |
2282 | ||
2283 | - Fix a number of bugs in omshell, and add the unset and refresh | |
2284 | statements. | |
2285 | ||
2286 | - Handle disconnects in OMAPI a little bit more intelligently (so that | |
2287 | the caller gets ECONNRESET instead of EINVAL). | |
2288 | ||
2289 | - Fix a bunch of bugs in the handling of clients that have existing | |
2290 | leases when the try to renew their leases while failover is | |
2291 | operating. | |
2292 | ||
2293 | Changes since 3.0 Release Candidate 6 | |
2294 | ||
2295 | - Fix a core dump that could happen when processing a DHCPREQUEST from | |
2296 | a client that had a host declaration that contained both a | |
2297 | fixed-address declaration and a dhcp-client-identifier option | |
2298 | declaration, if the client identifier was longer than nine bytes. | |
2299 | ||
2300 | - Fix a memory leak that could happen in certain obscure cases when | |
2301 | using omapi to manipulate leases. | |
2302 | ||
2303 | - Fix some bugs and omissions in omshell. | |
2304 | ||
2305 | ||
2306 | Changes since 3.0 Release Candidate 5 | |
2307 | ||
2308 | - Fix a bug in omapi_object_dereference that prevented objects in | |
2309 | chains from having their reference counts decreased on dereference. | |
2310 | ||
2311 | - Fix a bug in omapi_object_dereference that would prevent object | |
2312 | chains from being freed upon removal of the last reference external | |
2313 | to the chain. | |
2314 | ||
2315 | - Fix a number of other memory leaks in the OMAPI protocol subsystem. | |
2316 | ||
2317 | - Add code in the OMAPI protocol handler to trace memory leakage. | |
2318 | ||
2319 | - Clean up the memory allocation/reference history printer. | |
2320 | ||
2321 | - Support input of dotted quads and colon-separated hex lists as | |
2322 | attribute values in omshell. | |
2323 | ||
2324 | - Fix a typo in the Linux interface discovery code. | |
2325 | ||
2326 | - Conditionalize a piece of trace code that wasn't conditional. | |
2327 | ||
2328 | Changes since 3.0 Release Candidate 4 | |
2329 | ||
2330 | - Fix a bug that would prevent leases from being abandoned properly on | |
2331 | DHCPDECLINE. | |
2332 | ||
2333 | - Fix failover peer OMAPI support. | |
2334 | ||
2335 | - In failover, correctly handle expiration of leases. Previously, | |
2336 | leases would never be reclaimed because they couldn't make the | |
2337 | transition from EXPIRED to FREE. | |
2338 | ||
2339 | - Fix some broken failover state transitions. | |
2340 | ||
2341 | - Documentation fixes. | |
2342 | ||
2343 | - Take out an unnecessary check in DHCP relay agent information option | |
2344 | stashing code that was preventing REBINDING clients from rebinding. | |
2345 | ||
2346 | - Prevent failover peers from allocating leases in DHCPREQUEST | |
2347 | processing if the lease belongs to the other server. | |
2348 | ||
2349 | - Record server version in lease file introductory comment. | |
2350 | ||
2351 | - Correctly report connection errors in OMAPI and failover. | |
2352 | ||
2353 | - Make authentication signature algorithm name comparisons in OMAPI | |
2354 | case-insensitive. | |
2355 | ||
2356 | - Fix compile problem on SunOS 4.x | |
2357 | ||
2358 | - If a signature algorithm is not terminated with '.', terminate it so | |
2359 | that comparisons between fully-qualified names will work | |
2360 | consistently. | |
2361 | ||
2362 | - Different SIOCGIFCONF probe code, may "fix" problem on some Linux | |
2363 | systems with the probe not working correctly. | |
2364 | ||
2365 | - Don't allow user to type omapi key on command line of omshell. | |
2366 | ||
2367 | Changes since 3.0 Release Candidate 3 | |
2368 | ||
2369 | - Do lease billing on startup in a way that I *think* will finally do | |
2370 | the billing correctly - the previous method could overbill as a | |
2371 | result of duplicate leases. | |
2372 | ||
2373 | - Document OMAPI server objects. | |
2374 | ||
2375 | Changes since 3.0 Release Candidate 2 Patchlevel 1 | |
2376 | ||
2377 | - Fix some problems in the DDNS update code. Thanks to Albert | |
2378 | Herranz for figuring out the main problem. | |
2379 | ||
2380 | - Fix some reference counting errors on host entries that were causing | |
2381 | core dumps. | |
2382 | ||
2383 | - Fix a byte-swap bug in the token ring code, thanks to Jochen | |
2384 | Friedrich. | |
2385 | ||
2386 | - Fix a bug in lease billing, thanks to Jonas Bulow. | |
2387 | ||
2388 | Changes since 3.0 Release Candidate 2 | |
2389 | ||
2390 | - Change the conditions under which a DHCPRELEASE is actually | |
2391 | committed to be consistent with lease binding states rather than | |
2392 | using the lease end time. This may fix some problems with the | |
2393 | billing class code. | |
2394 | ||
2395 | - Fix a bug where lease updates would fail on Digital Unix (and maybe | |
2396 | others) because malloc was called with a size of zero. | |
2397 | ||
2398 | - Fix a core dump that happens when the DHCP server can't create its | |
2399 | trace file. | |
2400 | ||
2401 | Changes since 3.0 Release Candidate 1 Patchlevel 1 | |
2402 | ||
2403 | - Fix the dhcp_failover_put_message to not attempt to allocate a | |
2404 | zero-length buffer. Some versions of malloc() fail if you try to | |
2405 | allocate a zero-length buffer, and this was causing problems on, | |
2406 | e.g., Digital Unix. | |
2407 | ||
2408 | - Fix a case where the failover code was printing an error message | |
2409 | when no error had occurred. | |
2410 | ||
2411 | - Fix a problem where when a server went down and back up again, the | |
2412 | peer would not see a state transition and so would stay in the | |
2413 | non-communicating state. | |
2414 | ||
2415 | - Be smart about going into recover_wait. | |
2416 | ||
2417 | - Fix a problem in the failover implementation where peers would fail | |
2418 | to come into sync if interrupted in the RECOVER state. This could | |
2419 | have been the cause of some problems people have reported recently. | |
2420 | ||
2421 | - Fix a problem with billing classes where they would not be unbilled | |
2422 | when the client lease expired. | |
2423 | ||
2424 | - If select fails, figure out which descriptor is bad, and cut it out | |
2425 | of the I/O loop. This prevents a potentially nasty spin. I | |
2426 | haven't heard any report it in a while, but it came up consistently | |
2427 | in testing. | |
2428 | ||
2429 | - Fix a bug in the relay agent where if you specified interfaces on | |
2430 | the command line, it would fail. | |
2431 | ||
2432 | - Fix a couple of small bugs in the omapi connection object (no known | |
2433 | user impact). | |
2434 | ||
2435 | - Add the missing 3.0 Beta 1 lease conversion script. | |
2436 | ||
2437 | - Read dhcp client script hooks if they exist, rather than only if | |
2438 | they're executable. | |
2439 | ||
2440 | Changes since 3.0 Release Candidate 1 | |
2441 | ||
2442 | - Fix a memory smash that happens when fixed-address leases are used. | |
2443 | ANY SITE AT WHICH FIXED-ADDRESS STATEMENTS ARE BEING USED SHOULD | |
2444 | UPGRADE IMMEDIATELY. This has been a long-standing bug - thanks to | |
2445 | Alvise Nobile for discovering it and helping me to find it! | |
2446 | ||
2447 | - Fix a small bug in binary-to-ascii, thanks to H. Peter Anvin of | |
2448 | Transmeta. | |
2449 | ||
2450 | - There is a known problem with the DHCP server doing failover on | |
2451 | Compaq Alpha systems. This patchlevel is not a release candidate | |
2452 | because of this bug. The bug should be straightforward to fix, so | |
2453 | a new release candidate is expected shortly. | |
2454 | ||
2455 | - There is a known problem in the DDNS update code that is probably a | |
2456 | bug, and is not, as far as we know, fixed in this patchlevel. | |
2457 | ||
2458 | Changes since 3.0 Beta 2 Patchlevel 24 | |
2459 | ||
2460 | - Went over problematic failover state transitions and made them all | |
2461 | work, so that failover should now much less fragile. | |
2462 | ||
2463 | - Add some dhcpctl and omapi documentation | |
2464 | ||
2465 | - Fix compile errors when compiling with unusual predefines. | |
2466 | ||
2467 | - Make Token Ring work on Linux 2.4 | |
2468 | ||
2469 | - Fix the Digital Unix BPF_WORDALIGN bug. | |
2470 | ||
2471 | - Fix some dhcp client documentation errors. | |
2472 | ||
2473 | - Update some parts of the README file. | |
2474 | ||
2475 | - Support GCC on SCO. | |
2476 | ||
2477 | Changes since 3.0 Beta 2 Patchlevel 23 | |
2478 | ||
2479 | - Fix a bug in the DNS update code where a status code was not being | |
2480 | checked. This may have been causing core dumps. | |
2481 | ||
2482 | - When parsing the lease file, if a lease declaration includes a | |
2483 | billing class statement, and the lease already has a billing class, | |
2484 | unbill the old class. | |
2485 | ||
2486 | - When processing failover transactions, where acks will be deferred, | |
2487 | process the state transition immediately. | |
2488 | ||
2489 | - Don't try to use the new SIOCGIFCONF buffer size detection code on | |
2490 | Linux 2.0, which doesn't provide this functionality. | |
2491 | ||
2492 | - Apply a patch suggested by Tuan Uong for a problem in dlpi.c. | |
2493 | ||
2494 | - Fix a problem in using the which command in the configure script. | |
2495 | ||
2496 | - Fix a parse error in the client when setting up an omapi listener. | |
2497 | ||
2498 | - Document the -n and -g flags to the client. | |
2499 | ||
2500 | - Make sure there is always a stdin and stdout on startup. This | |
2501 | prevents shell scripts from accidentally writing error messages into | |
2502 | configuration files that happen to be opened as stderr. | |
2503 | ||
2504 | - If an interface is removed, the client will now notice that it is | |
2505 | gone rather than spinning. This has only been tested on NetBSD. | |
2506 | ||
2507 | - The client will attempt to get an address even if it can't create a | |
2508 | lease file. | |
2509 | ||
2510 | - Don't overwrite tracefiles. | |
2511 | ||
2512 | - Fix some memory allocation bugs in failover. | |
2513 | ||
2514 | Changes since 3.0 Beta 2 Patchlevel 22 | |
2515 | ||
2516 | - Apply some patches suggested by Cyrille Lefevre, who is maintaining | |
2517 | the FreeBSD ISC DHCP Distribution port. | |
2518 | ||
2519 | - Fix a core dump in DHCPRELEASE. | |
2520 | ||
2521 | Changes since 3.0 Beta 2 Patchlevel 21 | |
2522 | ||
2523 | - This time for sure: fix the spin described in the changes for pl20. | |
2524 | ||
2525 | Changes since 3.0 Beta 2 Patchlevel 20 | |
2526 | ||
2527 | - Fix a problem with Linux detecting large numbers of interfaces (Ben) | |
2528 | ||
2529 | - Fix a memory smash in the quotify code, which was introduced in | |
2530 | pl19. | |
2531 | ||
2532 | - Actually fix the spin described in the changes for pl20. The | |
2533 | previous fix only partially fixed the problem - enough to get it | |
2534 | past the regression test. | |
2535 | ||
2536 | Changes since 3.0 Beta 2 Patchlevel 19 | |
2537 | ||
2538 | - Fix a bug that could cause the server to abort if compiled with | |
2539 | POINTER_DEBUG enabled. | |
2540 | ||
2541 | - Fix a bug that could cause the server to spin when responding to a | |
2542 | DHCPREQUEST. | |
2543 | ||
2544 | - Apply Joost Mulders' suggested patches for DLPI on x86. | |
2545 | ||
2546 | - Support NUL characters in quoted strings. | |
2547 | ||
2548 | - Install unformatted man pages on SunOS. | |
2549 | ||
2550 | Changes since 3.0 Beta 2 Patchlevel 18 | |
2551 | ||
2552 | - Allow the server to be placed in partner-down state using OMAPI. | |
2553 | (Damien Neil) | |
2554 | ||
2555 | - Implement omshell, which can be used to do arbitrary things to the | |
2556 | server (in theory). (Damien Neil) | |
2557 | ||
2558 | - Fix a case where if a client had two different leases the server could | |
2559 | actually dereference the second one when it hadn't been referenced, | |
2560 | leading to memory corruption and a core dump. (James Brister) | |
2561 | ||
2562 | - Fix a case where a client could request the address of another client's | |
2563 | lease, but find_lease wouldn't detect that the other client had it, and | |
2564 | would attempt to allocate it to the client, resulting in a lease conflict | |
2565 | message. | |
2566 | ||
2567 | - Fix a case where a client with more than one client identifier could be | |
2568 | given a lease where the hardware address was correct but the client | |
2569 | identifier was not, resulting in a lease conflict message. | |
2570 | ||
2571 | - Fix a problem where the server could write out a colon-separated | |
2572 | hex list as a value for a variable, which would then not parse. | |
2573 | The fix is to always write strings as quoted strings, with any | |
2574 | non-printable characters quoted as octal escape sequences. So | |
2575 | a file written the old way still won't work, but new files written | |
2576 | this way will work. | |
2577 | ||
2578 | - Fix documentation for sending non-standard options. | |
2579 | ||
2580 | - Use unparsable names for unknown options. WARNING: this will | |
2581 | break any configuration files that use the option-nnn convention. | |
2582 | If you want to continue to use this convention for some options, | |
2583 | please be sure to write a definition, like this: | |
2584 | ||
2585 | option option-nnn code nnn = string; | |
2586 | ||
2587 | You can use a descriptive name instead of option-nnn if you like. | |
2588 | ||
2589 | - Fix a problem where we would see a DHCPDISCOVER/DHCPOFFER/ | |
2590 | DHCPREQUEST/DHCPACK/DHCPREQUEST/DHCPNAK sequence. This was the | |
2591 | result of a deceptively silly bug in supersede_lease. | |
2592 | ||
2593 | - Fix client script exit status check, according to a fix supplied by | |
2594 | Hermann Lauer. | |
2595 | ||
2596 | - Fix an endianness bug in the tracefile support, regarding ICMP | |
2597 | messages. | |
2598 | ||
2599 | - Fix a bug in the client where the medium would not work correctly if | |
2600 | it contained quoted strings. | |
2601 | ||
2602 | ** there was no pl17 ** | |
2603 | ||
2604 | Changes since 3.0 Beta 2 Patchlevel 16 | |
2605 | ||
2606 | - Add support for transaction tracing. This allows the state of the | |
2607 | DHCP server on startup, and all the subsequent transactions, to be | |
2608 | recorded in a file which can then be played back to reproduce the | |
2609 | behaviour of the DHCP server. This can be used to quickly | |
2610 | reproduce bugs that cause core dumps or corruption, and also for | |
2611 | tracking down memory leaks. | |
2612 | ||
2613 | - Incorporate some bug fixes provided by Joost Mulders for the DLPI | |
2614 | package which should clear up problems people have been seeing on | |
2615 | Solaris. | |
2616 | ||
2617 | - Fix bugs in the handling of options stored as linked lists (agent | |
2618 | options, fqdn options and nwip options) that could cause memory | |
2619 | corruption and core dumps. | |
2620 | ||
2621 | - Fix a bug in DHCPREQUEST handling that resulted in DHCPNAK messages | |
2622 | not being send in some cases when they were needed. | |
2623 | ||
2624 | - Make the lease structure somewhat more compact. | |
2625 | ||
2626 | - Make initial failover startup *much* faster. This was researched | |
2627 | and implemented by Damien Neil. | |
2628 | ||
2629 | - Add a --version flag to all executables, which prints the program | |
2630 | name and version to standard output. | |
2631 | ||
2632 | - Don't rewrite the lease file every thousand leases. | |
2633 | ||
2634 | - A bug in nit.c for older SunOS machines was fixed by a patch sent in | |
2635 | by Takeshi Hagiwara. | |
2636 | ||
2637 | - Fix a memory corruption bug in the DHCP client. | |
2638 | ||
2639 | - Lots of documentation updates. | |
2640 | ||
2641 | - Add a feature allowing environment variables to be passed to the | |
2642 | DHCP client script on the DHCP client command line. | |
2643 | ||
2644 | - Fix client medium support, which had been broken for some time. | |
2645 | ||
2646 | - Fix a bug in the DHCP client initial startup backoff interval, which | |
2647 | would cause two DHCPDISCOVERS to be sent back-to-back on startup. | |
2648 | ||
2649 | ||
2650 | Changes since 3.0 Beta 2 Patchlevel 15 | |
2651 | ||
2652 | - Some documentation tweaks. | |
2653 | ||
2654 | - Maybe fix a problem in the DLPI code. | |
2655 | ||
2656 | - Fix some error code space inconsistencies in ddns update code. | |
2657 | ||
2658 | - Support relay agents that intercept unicast DHCP messages to stuff | |
2659 | agent options into them. | |
2660 | ||
2661 | - Fix a small memory leak in the relay agent option support code. | |
2662 | ||
2663 | - Fix a core dump that would occur if a packet was sent with no | |
2664 | options. | |
2665 | ||
2666 | Changes since 3.0 Beta 2 Patchlevel 14 | |
2667 | ||
2668 | - Finish fixing a long-standing bug in the agent options code. This | |
2669 | was causing core dumps and failing to operate correctly - in | |
2670 | particular, agent option stashing wasn't working. Agent option | |
2671 | stashing should now be working, meaning that agent options can be | |
2672 | used in class statements to control address allocation. | |
2673 | ||
2674 | - Fix up documentation. | |
2675 | ||
2676 | - Fix a couple of small memory leaks that would have added up | |
2677 | significantly in a high-demand situation. | |
2678 | ||
2679 | - Add a log-facility configuration parameter. | |
2680 | ||
2681 | - Fix a compile error on some older operating systems. | |
2682 | ||
2683 | - Add the ability in the client to execute certain statements before | |
2684 | transmitting packets to the server. Handy for debugging; not much | |
2685 | practical use otherwise. | |
2686 | ||
2687 | - Don't send faked-out giaddr when renewing or bound - again, useful | |
2688 | for debugging. | |
2689 | ||
2690 | Changes since 3.0 Beta 2 Patchlevel 13 | |
2691 | ||
2692 | - Fixed a problem where the fqdn decoder would sometimes try to store | |
2693 | an option with an (unsigned) negative length, resulting in a core | |
2694 | dump on some systems. | |
2695 | ||
2696 | - Work around the Win98 DHCP client, which NUL-terminates the FQDN | |
2697 | option. | |
2698 | ||
2699 | - Work around Win98 and Win2k clients that will claim they want to do | |
2700 | the update even when they don't have any way to do it. | |
2701 | ||
2702 | - Fix some log messages that can be printed when failover is operating | |
2703 | that were not printing enough information. | |
2704 | ||
2705 | - It was possible for a DHCPDISCOVER to get an allocation even when | |
2706 | the state machine said the server shouldn't be responding. | |
2707 | ||
2708 | - Don't load balance DHCPREQUESTs from clients in RENEWING and | |
2709 | REBINDING, since in RENEWING, if we heard it, it's for us, and in | |
2710 | REBINDING, the client wouldn't have got to REBINDING if its primary | |
2711 | were answering. | |
2712 | ||
2713 | - When we get a bogus state lease binding state transition, don't do | |
2714 | the transition. | |
2715 | ||
2716 | ||
2717 | Changes since 3.0 Beta 2 Patchlevel 12 | |
2718 | ||
2719 | - Fixed a couple of silly compile errors. | |
2720 | ||
2721 | Changes since 3.0 Beta 2 Patchlevel 11 | |
2722 | ||
2723 | - Albert Herranz tracked down and fixed a subtle bug in the base64 | |
2724 | decoder that would prevent any key with an 'x' in its base64 | |
2725 | representation from working correctly. | |
2726 | ||
2727 | - Thanks to Chris Cheney and Michael Sanders, we have a fix for the | |
2728 | hang that they both spotted in the DHCP server - when | |
2729 | one-lease-per-client was set, the code to release the "other" lease | |
2730 | could spin. | |
2731 | ||
2732 | - Fix a problem with alignment of the input buffer in bpf in cases | |
2733 | where two packets arrive in the same bpf read. | |
2734 | ||
2735 | - Fix a problem where the relay agent would crash if you specified an | |
2736 | interface name on the command line. | |
2737 | ||
2738 | - Add the ability to conditionalize client behaviour based on the | |
2739 | client state. | |
2740 | ||
2741 | - Add support for the FQDN option, and added support for a new way of | |
2742 | doing ddns updates (ddns update style interim) that allows more than | |
2743 | one DHCP server to update the DNS for the same network(s). This | |
2744 | was implemented by Damien Neil with some additional functionality | |
2745 | added by Ted Lemon. | |
2746 | ||
2747 | - Damien added a "log" statement, so that the configuration file can | |
2748 | be made to log debugging information and other information. | |
2749 | ||
2750 | - Fixed a bug that caused option buffers not to be terminated with an | |
2751 | end option. | |
2752 | ||
2753 | - Fixed a long-standing bug in the support for option spaces where the | |
2754 | options are stored as an ordered list rather than in a hash table, | |
2755 | which could theoretically result in memory pool corruption. | |
2756 | ||
2757 | - Prevent hardware declarations with no actual hardware address from | |
2758 | being written as something unparsable, and behave correctly in the | |
2759 | face of a null hardware address on input. | |
2760 | ||
2761 | - Allow key names to be FQDNs, and qualify the algorithm name if it is | |
2762 | specified unqualified. | |
2763 | ||
2764 | - Modify the DDNS update code so that it never prints the "resolver | |
2765 | failed" message, but instead says *why* the resolver failed. | |
2766 | ||
2767 | - Officially support the subnet selection option, which now has an | |
2768 | RFC. | |
2769 | ||
2770 | - Fix a build bug on MacOS X. | |
2771 | ||
2772 | - Allow administrator to disable ping checking. | |
2773 | ||
2774 | - Clean up dhcpd.conf documentation and add more information about how | |
2775 | it works. | |
2776 | ||
2777 | Changes since 3.0 Beta 2 Patchlevel 10 | |
2778 | ||
2779 | - Fix a bug introduced during debugging (!) and accidentally committed | |
2780 | to CVS. | |
2781 | ||
2782 | Changes since 3.0 Beta 2 Patchlevel 9 | |
2783 | ||
2784 | - Fix DHCP client handling of vendor encapsulated options. | |
2785 | ||
2786 | - Fix a bug in the handling of relay agent information options introduced | |
2787 | in patchlevel 9. | |
2788 | ||
2789 | - Stash agent options on client leases by default, and use the stashed | |
2790 | options at renewal time. | |
2791 | ||
2792 | - Add the ability to test the client's binding state in the client | |
2793 | configuration language. | |
2794 | ||
2795 | - Fix a core dump in the DNS update code. | |
2796 | ||
2797 | - Fix some expression evaluation bugs that were causing updates to be | |
2798 | done when no client hostname was received. | |
2799 | ||
2800 | - Fix expression evaluation debugging printfs. | |
2801 | ||
2802 | - Teach pretty_print_option to print options in option spaces other than | |
2803 | the DHCP option space. | |
2804 | ||
2805 | - Add a warning message if the RHS of a not is not boolean. | |
2806 | ||
2807 | - Never select for more than a day, because some implementations of | |
2808 | select will just fail if the timeout is too long (!). | |
2809 | ||
2810 | - Fix a case where a DHCPDISCOVER from an unknown network would be | |
2811 | silently dropped. | |
2812 | ||
2813 | - Fix a bug where if a client requested an IP address for which a different | |
2814 | client had the lease, the DHCP server would reallocate it anyway. | |
2815 | ||
2816 | - Fix the DNS update code so that if the client changes its name, the DNS | |
2817 | will be correctly updated. | |
2818 | ||
2819 | Changes since 3.0 Beta 2 Patchlevel 8 | |
2820 | ||
2821 | - Oops, there was another subtle math error in the header-length | |
2822 | bounds-checking. | |
2823 | ||
2824 | Changes since 3.0 Beta 2 Patchlevel 7 | |
2825 | ||
2826 | - Oops, forgot to byte-swap udp header length before bounds-checking it. | |
2827 | ||
2828 | Changes since 3.0 Beta 2 Patchlevel 6 | |
2829 | ||
2830 | - Fix a possible DoS attack where a client could cause the checksummer | |
2831 | to dump core. This was a read, not a write, so it shouldn't be | |
2832 | possible to exploit it any further than that. | |
2833 | ||
2834 | - Implement client- and server-side support for using the Client FQDN | |
2835 | option. | |
2836 | ||
2837 | - Support for other option spaces in the client has been added. This | |
2838 | means that it is now possible to define a vendor option space on the | |
2839 | client, request options in that space from the server (which must | |
2840 | define the same option space), and then use those options in the | |
2841 | client. This also allows NWIP and Client FQDN options to be used | |
2842 | meaningfully. | |
2843 | ||
2844 | - Add object initializer support. This means that objects can now be | |
2845 | initialized to something other than all-zeros when allocated, which | |
2846 | makes, e.g., the interface object support code a little more robust. | |
2847 | ||
2848 | - Fix an off-by-one bug in the host stuffer. This was causing host | |
2849 | deletes not the work, and may also have been causing OMAPI | |
2850 | connections to get dropped. Thanks to James Brister for tracking | |
2851 | this one down! | |
2852 | ||
2853 | - Fixed a core dump in the interface discovery code that is triggered | |
2854 | when there is no subnet declaration for an interface, but the server | |
2855 | decides to continue running. Thanks to Shane Kerr for tracking | |
2856 | down and fixing this problem. | |
2857 | ||
2858 | Changes since 3.0 Beta 2 Patchlevel 5 | |
2859 | ||
2860 | - Fix a bug in the recent enhancement to the interface discovery code | |
2861 | to support arbitrary-length interface lists. | |
2862 | ||
2863 | - Support NUL-terminated DHCP options when initializing client-script | |
2864 | environment. | |
2865 | ||
2866 | - Fix suffix operator. | |
2867 | ||
2868 | - Fix NetWare/IP option parsing. | |
2869 | ||
2870 | - Better error/status checking in dhcpctl initialization and omapi | |
2871 | connection code. | |
2872 | ||
2873 | - Fix a potential memory smash in dhcpctl code. | |
2874 | ||
2875 | - Fix SunOS4 and (maybe) Ultrix builds. | |
2876 | ||
2877 | - Fix a bug where a certain sort of incoming packet could cause a core | |
2878 | dump on Solaris (and probably elsewhere). | |
2879 | ||
2880 | - Add some more safety checks in error logging code. | |
2881 | ||
2882 | - Add support for ISC_R_INCOMPLETE in OMAPI protocol connection code. | |
2883 | ||
2884 | - Fix relay agent so that if an interface is specified on the command | |
2885 | line, the relay agent does not dump core. | |
2886 | ||
2887 | - Fix class matching so that match if can be combined with match or | |
2888 | spawn with. | |
2889 | ||
2890 | - Do not allow spurious leases in the lease database to introduce | |
2891 | potentially bogus leases into the in-memory database. | |
2892 | ||
2893 | - Fix a byte-order problem in the client hardware address type code | |
2894 | for OMAPI. | |
2895 | ||
2896 | - Be slightly less picky about what sort of hardware addresses OMAPI | |
2897 | can install in host declarations. | |
2898 | ||
2899 | Changes since 3.0 Beta 2 Patchlevel 4 | |
2900 | ||
2901 | - Incorporated Peter Marschall's proposed change to array/record | |
2902 | parsing, which allows things like the slp-agent option to be encoded | |
2903 | correctly. Thanks very much to Peter for taking the initiative to | |
2904 | do this, and for doing such a careful job of it (e.g., updating the | |
2905 | comments)! | |
2906 | ||
2907 | - Added an encoding for the slp-agent option. :') | |
2908 | ||
2909 | - Fixed SunOS 4 build. Thanks to Robert Elz for responding to my | |
2910 | request for help on this with patches! | |
2911 | ||
2912 | - Incorporated a change that should fix a problem reported by Philippe | |
2913 | Jumelle where when the network connection between two servers is | |
2914 | lost, they never reconnect. | |
2915 | ||
2916 | - Fix client script files other than that for NetBSD to actually use | |
2917 | make_resolv_conf as documented in the manual page. | |
2918 | ||
2919 | - Fix a bug in the packet handling code that could result in a core | |
2920 | dump. | |
2921 | ||
2922 | - Fix a bug in the bootp code where responses on the local net would | |
2923 | be sent to the wrong MAC address. Thanks to Jerry Schave for | |
2924 | catching this one. | |
2925 | ||
2926 | Changes since 3.0 Beta 2 Patchlevel 3 | |
2927 | ||
2928 | - In the DHCP client, execute client statements prior to using the values | |
2929 | of options, so that the client configuration can overridden, e.g., the | |
2930 | lease renewal time. | |
2931 | ||
2932 | - Fix a reference counting error that would result in very reproducible | |
2933 | failures in updates, as well as occasional core dumps, if a zone was | |
2934 | declared without a key. | |
2935 | ||
2936 | - Fix some Linux 2.0 compilation problems. | |
2937 | ||
2938 | - Fix a bug in scope evaluation during execution of "on" statements that | |
2939 | caused values not to be recorded on leases. | |
2940 | ||
2941 | - If the dhcp-max-message-size option is specified in scope, and the | |
2942 | client didn't send this option, use the one specified in scope to | |
2943 | determine the maximum size of the response. | |
2944 | ||
2945 | Changes since 3.0 Beta 2 Patchlevel 2 | |
2946 | ||
2947 | - Fix a case where spawning subclasses were being allocated | |
2948 | incorrectly, resulting in a core dump. | |
2949 | ||
2950 | - Fix a case where the DHCP server might inappropriately NAK a | |
2951 | RENEWING client. | |
2952 | ||
2953 | - Fix a place dhcprequest() where static leases could leak. | |
2954 | ||
2955 | - Include memory.h in omapip_p.h so that we don't get warnings about | |
2956 | using memcmp(). | |
2957 | ||
2958 | Changes since 3.0 Beta 2 Patchlevel 1 | |
2959 | ||
2960 | - Notice when SIOCFIGCONF returns more data than fit in the buffer - | |
2961 | allocate a larger buffer, and retry. Thanks to Greg Fausak for | |
2962 | pointing this out. | |
2963 | ||
2964 | - In the server, if no interfaces were configured, report an error and | |
2965 | exit. | |
2966 | ||
2967 | - Don't ever record a state of 'startup'. | |
2968 | ||
2969 | - Don't try to evaluate the local failover binding address if none was | |
2970 | specified. Thanks to Joseph Breu for finding this. |