1277 lines
44 KiB
Plaintext
1277 lines
44 KiB
Plaintext
Internet Systems Consortium DHCP Distribution
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Version 3.0.1rc14
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June 09, 2004
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Release Notes
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NEW FEATURES
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Version 3 of the ISC DHCP Distribution includes the following features
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that are new since version 2.0:
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- DHCP Failover Protocol support
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- OMAPI, an API for accessing and modifying the DHCP server and
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client state.
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- Conditional behaviour
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- Storing arbitrary information on leases
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- Address pools with access control
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- Client classing
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- Address allocation restriction by class
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- Relay agent information option support
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- Dynamic DNS updates
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- Many bug fixes, performance enhancements, and minor new DHCP
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protocol features.
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The main bug fixed here is a bug in the subclass allocation code that
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could result in a memory smash. Any users of the ISC DHCP server who
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are using subclasses should seriously consider upgrading to 3.0.1.
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If you are running 3.0 beta 1 and are doing dynamic DNS updates, the
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lease file is no longer forward-compatible to 3.0 final. A script
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has been provided to convert 3.0b1 lease files. This is in
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contrib/3.0b1-lease-convert.
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For information on how to install, configure and run this software,
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as well as how to find documentation and report bugs, please consult
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the README file.
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The Dynamic DNS Update support is a descendent of an implementation
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done by Lans Carstensen and Brian Dols at Rose-Hulman Institute of
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Technology, Jim Watt at Applied Biosystems, Irina Goble at Integrated
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Measurement Systems, Igor Sharfmesser at Kazakh Telecom, and Brian
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Murrell at BC Tel Advanced Communications. I'd like to express my
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thanks to all of these good people here, both for working on the code
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and for prodding me into improving it.
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Changes since 3.0.1rc13
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! CAN-2004-0460 - CERT VU#317350: Five stack overflow exploits were closed
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in logging messages with excessively long hostnames provided by the
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clients. It is highly probable that these could have been used by
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attackers to gain arbitrary root access on systems using ISC DHCP 3.0.1
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release candidates 12 or 13. Special thanks to Gregory Duchemin for
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both finding and solving the problem.
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! CAN-2004-0461 - CERT VU#654390: Once the above was closed, an opening
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in log_*() functions was evidented, on some specific platforms where
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vsnprintf() was not believed to be available and calls were wrapped to
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sprintf() instead. Again, credit goes to Gregory Duchemin for finding
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the problem. Calls to snprintf() are now linked to a distribution-local
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snprintf implementation, only in those cases where the architecture is
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not known to provide one (see includes/cf/[arch].h). If you experience
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linking problems with snprintf/vsnprintf or 'isc_print_' functions, this
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is where to look. This vulnerability did not exist in any previously
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published version of ISC DHCP.
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- Compilation on hpux 11.11 was repaired.
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- 'The cross-compile bug fix' was backed out.
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Changes since 3.0.1rc12
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- Fixed a bug in omapi lease lookup function, to form the hardware
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address for the hash lookup correctly, thanks to a patch from
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Richard Hirst.
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- Fixed a bug where dhcrelay was sending relayed responses back to the
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broadcast address, but with the source's unicast mac address. Should
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now conform to rfc2131 section 4.1.
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- Cross-compile bug fix; use $(AR) instead of ar. Thanks to Morten Brorup.
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- Fixed a crash bug in dhclient where dhcpd servers that do not provide
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renewal times results in an FPE. As a side effect, dhclient can now
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properly handle 0xFFFFFFFF (-1) expiry times supplied by servers. Thanks
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to a patch from Burt Silverman.
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- The 'ping timeout' debugs from rc12 were removed to -DDEBUG only,
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and reformatted to correct a compilation error on solaris platforms.
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- A patch was applied which fixes a case where leases read from the
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leases database do not properly over-ride previously read leases.
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- dhcpctl.3 manpage was tweaked.
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Changes since 3.0.1rc11
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- A patch from Steve Campbell was applied with minor modifications to
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permit reverse dns PTR record updates with values containing spaces.
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- A patch from Florian Lohoff was applied with some modifications to
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dhcrelay. It now discards packets whose hop count exceeds 10 by default,
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and a command-line option (-c) can be used to set this threshold.
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- A failover bug relating to identifying peers by name length instead of
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by name was fixed.
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- Delcaring failover configs within shared-network statements should no
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longer result in error.
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- The -nw command line option to dhclient now works.
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- Thanks to a patch from Michael Richardson:
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- Some problems with long option processing have been fixed.
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- Some fixes to minires so that updates of KEY records will work.
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- contrib/ms2isc was updated by Shu-Min Chang of the Intel Corporation.
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see contrib/ms2isc/readme.txt for revision notes.
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- Dhclient no longer uses shell commands to kill another instance of
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itself, it sends the signal directly. Thanks to a patch from Martin
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Blapp.
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- The FreeBSD dhclient-script was changed so that a failure to write to
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/etc/resolv.conf does not prematurely end the script. This keeps dhclient
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from looping infinitely when this is the case. Thanks to a patch from
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Martin Blapp.
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- A patch from Bill Stephens was applied which resolves a problem with lease
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expiry times in failover configurations.
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- A memory leak in configuration parsing was closed thanks to a patch from
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Steve G.
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- The function which discovers interfaces will now skip non-broadcast or
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point-to-point interfaces, thanks to a patch from David Brownlee.
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- Options not yet known by the dhcpd or dhclient have had their names
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changed such that they do not contain # symbols, in case they should ever
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appear in a lease file. An option that might have been named "#144" is
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now "unknown-144".
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- Another patch from Bill Stephens which allows the ping-check timeout to
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be configured as 'ping-timeout'. Defaults to 1.
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Changes since 3.0.1rc10
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- Potential buffer overflows in minires repaired.
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- A change to the linux client script to use /bin/bash, since /bin/sh may
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not be bash.
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- Some missing va_end cleanups thanks to a patch from Thomas Klausner.
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- A correction of boolean parsing syntax validation - some illegal syntaxes
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that worked before are now detected and produce errs, some legal syntaxes
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that errored before will now work properly.
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- Some search-and-replace errors that caused some options to change their
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names was repaired.
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- Shu-min Chang of the Intel corporation has contributed a perl script and
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module that converts the MS NT4 DHCP configuration to a ISC DHCP3
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configuration file.
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- Applied the remainder of the dhcpctl memory leak patch provided by Bill
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Squier at ReefEdge, Inc. (groo@reefedge.com).
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- Missing non-optional failover peer configurations will now result in a soft
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error rather than a null dereference.
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Changes since 3.0.1rc9
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- A format string was corrected to fix compiler warnings.
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- A number of spelling corrections were made in the man pages.
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- The dhclient.conf.5 man page was changed to refer to do-forward-updates
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rather than a configuration option that doesn't exist.
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- A FreeBSD-specific bug in the interface removal handling was fixed.
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- A Linux-specific Token Ring detection problem was fixed.
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- Hashes removed from as-yet-unknown agent options, having those options
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appear in reality before we know about them will no longer produce
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self-corrupting lease databases.
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- dhclient will use the proper port numbers now when using the -g option.
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- A order-of-operations bug with 2 match clauses in 1 class statement is
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fixed thanks to a patch from Andrew Matheson.
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- Compilation problems on Solaris were fixed.
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- Compilation problems when built with DEBUG or DEBUG_PACKET were repaired.
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- A fix to the dhcp ack process which makes certain group options will be
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included in the first DHCPOFFER message was made thanks to a patch from
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Ling Gou.
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- A few memory leaks were repaired thanks to patches from Bill Squier at
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ReefEdge, Inc. (groo@reefedge.com).
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- A fix for shared-networks that sometimes give clients options for the
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wrong subnets (in particular, 'option routers') was applied, thanks to
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Ted Lemon for the patch.
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- Omshell's handling of dotted octets as values was changed such that dots
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one after the other produce zero values in the integer string.
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Changes since 3.0.1rc8
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- Fix a format string vulnerability in the server that could lead to a
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remote root compromise (discovered by NGSEC Research Team, www.ngsec.com).
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- Add additional support for NetBSD/sparc64.
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- Fix a bug in the command-line parsing of the client. Also, resolve
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a memory leak.
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- Add better support for shells other than bash in the Linux client
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script.
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- Various build fixes for modern versions of FreeBSD and Linux.
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- Fix a bad bounds check when printing binding state names.
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- Clarify documentation about fixed-address and multiple addresses.
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- Fix a typo in the authoritative error message.
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- Make a log entry when we can't write a billing class.
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- Use conversion targets that are the right size on all architectures.
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- Increment the hop count when relaying.
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- Log a message when lease state is changed through OMAPI.
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- Don't rerun the shared_network when evaluating the pool.
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- Fix a reversed test in the parser.
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- Change the type of rbuf_max.
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- Make FTS_LAST a manifest constant to quiet warnings.
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Changes since 3.0.1rc7
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- Fix two compiler warnings that are generated when compiling on Solaris
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with gcc. These stop the build, even though they weren't actually
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errors, because we prefer that our builds generate no warnings.
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Changes since 3.0.1rc6
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- Don't allow a lease that's in the EXPIRED, RELEASED or RESET state
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to be renewed.
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- Implement lease stealing for cases where the primary has fewer leases
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than the secondary, as called for by the standard.
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- Add a fudge factor to the lease expiry acceptance code, (suggested
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by Kevin Miller of CMU).
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- Fix a bug in permit_list_match that made it much too willing to say
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that two permit lists matched.
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- Unless DEBUG_DNS_UPDATES is defined, print more user-friendly (and
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also more compact) messages about DNS updates.
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- Fix a bug in generating wire-format domain names for the FQDN option.
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- Fix a bug where the FQDN option would not be returned if the client
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requested it, contrary to the standard.
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- On Darwin, use the FreeBSD DHCP client script.
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- On NetBSD/sparc, don't check for casting warnings.
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- Add a flag in the DHCP client to disable updating the client's A
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record when sending an FQDN option indicating that the client is
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going to update its A record.
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- In the client, don't attempt a DNS update until one second after
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configuring the new IP address, and if the update times out, keep
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trying until a response, positive or negative, is received from the
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DNS server.
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- Fix an uninitialized memory bug in the DHCP client.
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- Apply some FreeBSD-specific bug fixes suggested by Murray Stokely.
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- Fix a bug in ns_parserr(), where it was returning the wrong sort
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of result code in some cases (suggested by Ben Harris of the
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NetBSD project).
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- Fix a bug in is_identifier(), where it was checking against EOF
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instead of the END_OF_FILE token (also suggested by Ben Harris).
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- Fix a bug where if an option universe contained no options, the
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DHCP server could dump core (Walter Steiner).
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- Fix a bug in the handling of encapsulated options.
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- Fix a bug that prevented NWIP suboptions from being processed.
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- Delete the FTS_BOOTP and FTS_RESERVED states and implement them
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as modifier flags to the FTS_ACTIVE state, as called for in the
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failover protocol standard.
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- Fix bugs in the pool merging code that resulted in references and
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dereferences of null pointers. This bug had no impact unless the
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POINTER_DEBUG flag was defined.
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- In the server, added a do-forward-updates flag that can be used to
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disable forward updates in all cases, so that sites that want the
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clients to take sole responsibility for updating their A record can
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do so.
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- Make it possible to disable optimization of PTR record updates.
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Changes since 3.0.1rc5
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- Include some new documentation and changes provided by Karl Auer.
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- Add a workaround for some Lexmark printers that send a double-NUL-
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terminated host-name option, which would break DNS updates.
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- Fix an off-by-one error in the MAC-address checking code for
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DHCPRELEASE that was added in 3.0.1rc5.
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- Fix a bug where client-specific information was not being discarded
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from the lease when it expired or was released, resulting in
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problems if the lease was reallocated to a different client.
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- If more than one allocation pool is specified that has the same set
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of constraints as another allocation pool on the same shared
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network, merge the two pools.
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- Don't print an error in fallback_discard, since this just causes
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confusion and does not appear to be helping to encourage anyone to
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fix this bug.
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Changes since 3.0.1rc4
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- Fix a bug that would cause the DHCP server to spin if asked to parse
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a certain kind of incorrect statement.
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- Fix a related bug that would prevent an error from being reported in
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the same case.
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- Additional documentation.
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- Make sure that the hardware address matches the lease when
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processing a DHCPRELEASE message.
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Changes since 3.0.1rc3
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- A minor bug fix in the arguments to a logging function call.
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- Documentation update for dhcpd.conf.
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Changes since 3.0.1rc2
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- Allow the primary to send a POOLREQ message. This isn't what the current
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failover draft says to do, so we may have to back it out if I can't get the
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authors to relent, but the scheme for balancing that's specified in the
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current draft seems needlessly hairy, so I'm floating a trial balloon.
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The rc1 code did not implement the method described in the draft either.
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Changes since 3.0.1rc1
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- Treat NXDOMAIN and NXRRSET as success when we are trying to delete a
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domain or RRSET. This allows the DHCP server to forget about a name
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it added to the DNS once it's been removed, even if the DHCP server
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wasn't the one that removed it.
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- Install defaults for failover maximum outstanding updates and maximum
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silent time. This prevents problems that might occur if these values
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were not configured.
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- Don't do DDNS deletes if ddns-update-style is none.
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- Return relay agent information options in DHCPNAK. This prevents DHCPNAK
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messages from being dropped when the relay agent information option contains
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routing information.
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- Fix a problem where coming up in recover wouldn't result in an update
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request being sent.
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- Add some more chatty messages when we start a recovery update and when it's
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done.
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- Fix a possible problem where some state might have been left around
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after the peer lost contact and regained contact about how many updates
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were pending.
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- Don't nix a lease update because of a lease conflict. This test has
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never (as far as I know) prevented a mistake, and it appears to cause
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problems with failover.
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- Add support in rc history code for keeping a selective history, rather
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than a history of all references and dereferences. This code is only used
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when extensive additional debugging is enabled.
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Changes since 3.0
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- Make allocators for hash tables. As a side effect, this fixes a memory
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smash in the subclass allocation code.
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- Fix a small bug in omshell where if you try to close an object when
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no object is open, it dumps core.
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- Fix an obscure coredump that could occur on shutdown.
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- Fix a bug in the recording of host declaration rubouts in the lease file.
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- Fix two potential spins in the host deletion code.
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- Fix a core dump that would happen if an application tried to update
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a host object attribute with a null value.
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Changes since 3.0 Release Candidate 12
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- Fix a memory leak in the evaluation code.
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- Fix an obscure core dump.
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- Print a couple of new warnings when parsing the configuration file
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when crucial information is left out.
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- Log "no free leases" as an error.
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- Documentation updates.
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Changes since 3.0 Release Candidate 11
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- Always return a subnet selection option if one is sent.
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- Fix a warning that was being printed because an automatic data
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structure wasn't zeroed.
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- Fix some failover state transitions that were being handled
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incorrectly.
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- When supersede_lease is called on a lease whose end time has already
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expired, but for which a state transition has not yet been done, do
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a state transition. This fixes the case where if the secondary
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allocated a lease to a client and the lease "expired" while the
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secondary was in partner-down, no expiry event would actually
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happen, so the lease would remain active until the primary was
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restarted.
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Changes since 3.0 Release Candidate 10
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- Fix a bug that was preventing released leases from changing state
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in failover-enabled pools.
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- Fix a core dump in the client identifier finder code (for host
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declarations).
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- Finish fixing a bug where bogus data would sometimes get logged to
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the dhclient.leases file because it was opened as descriptor 2.
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- Fix the Linux dhclient-script according to suggestions made by
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several people on the dhcp-client mailing list.
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- Log successful DNS updates at LOG_INFO, not LOG_ERROR.
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- Print an error message and refuse to run if a failover peer is
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defined but not referenced by any pools.
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- Correct a confusing error message in failover.
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Changes since 3.0 Release Candidate 9
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- Fix a bug in lease allocation for Dynamic BOOTP clients.
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Changes since 3.0 Release Candidate 8 Patchlevel 2
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- Fix a bug that prevented update-static-leases from working.
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- Document failover-state OMAPI object.
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- Fix a compilation error on SunOS 4.
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Changes since 3.0 Release Candidate 8 Patchlevel 1
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- Fix a parsing bug that broke dns updates (both interim and ad-hoc).
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This was introduced in rc8pl1 as an unintended result of the memory
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leakage fixes that were in pl1.
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- Fix a long-standing bug where the server would record that an update
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had been done for a client with no name, even though no update had
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been done, and then when the client's lease expired the deletion of
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that nonexistant record would time out because the name was the null
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string.
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- Clean up the omshell, dhcpctl and omapi man pages a bit.
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Changes since 3.0 Release Candidate 8
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- Fix a bug that could cause the DHCP server to spin if
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one-lease-per-client was enabled.
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- Fix a bug that was causing core dumps on BSD/os in the presence of
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malformed packets.
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- In partner-down state, don't restrict lease lengths to MCLT.
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- On the failover secondary, record the MCLT received from the primary
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so that if we come up without a connection to the primary we don't
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wind up giving out zero-length leases.
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- Fix some compilation problems on BSD/os.
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- Fix a bunch of memory leaks.
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- Fix a couple of bugs in the option printer.
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- Fix an obscure error reporting bug in the dns update code, and also
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make the message clearer when a key algorithm isn't supported.
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- Fix a bug in the tracing code that prevented trace runs that used
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tcp connections from being played back.
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- Add some additional debugging capability for catching memory leaks
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|
on exit.
|
|
|
|
- Make the client release the lease correctly on shutdown.
|
|
|
|
- Add some configurability to the build system.
|
|
|
|
- Install omshell manual page in man1, not man8.
|
|
|
|
- Craig Gwydir sent in a patch that fixes a long-standing bug in the
|
|
DHCP client that could cause core dumps, but that for some reason
|
|
hadn't been noticed until now.
|
|
|
|
Changes since 3.0 Release Candidate 7
|
|
|
|
- Fix a bug in failover where we weren't sending updates after a
|
|
transition from communications-interrupted to normal.
|
|
|
|
- Handle expired/released/reset -> free transition according to the
|
|
protocol specification (this works - the other way not only wasn't
|
|
conformant, but also didn't work).
|
|
|
|
- Add a control object in both client and server that allows either
|
|
daemon to be shut down cleanly.
|
|
|
|
- When writing a lease, if we run out of disk space, shut down the
|
|
output file and insist on writing a new one before proceeding.
|
|
|
|
- In the server, if the OMAPI listener port is occupied, keep trying
|
|
to get it, rather than simply giving up and exiting.
|
|
|
|
- Support fetching variables from leases and also updating and adding
|
|
variables to leases via OMAPI.
|
|
|
|
- If two failover peers have wildly different clocks, refuse to start
|
|
doing failover.
|
|
|
|
- Fix a bug in the DNS update code that could cause core dumps when
|
|
running on alpha processors.
|
|
|
|
- Fixed a bug in ddns updates for static lease entries, thanks to a
|
|
patch from Andrey M Linkevitch.
|
|
|
|
- Add support for Darwin/MacOS X
|
|
|
|
- Install omshell (including new documentation).
|
|
|
|
- Support DNS updates in the client (this is a very obscure feature
|
|
that most DHCP client users probably will not be able to use).
|
|
|
|
- Somewhat cleaner status logging in the client.
|
|
|
|
- Make OMAPI key naming syntax compatible with the way keys are
|
|
actually named (key names are domain names).
|
|
|
|
- Fix a bug in the lease file writer.
|
|
|
|
- Install DHCP ISC headers in a different place than BIND 9 ISC
|
|
headers, to avoid causing trouble in BIND 9 builds.
|
|
|
|
- Don't send updates for attributes on an object when the attributes
|
|
haven't changed. Support deleting attributes on remote objects.
|
|
|
|
- Fix a number of bugs in omshell, and add the unset and refresh
|
|
statements.
|
|
|
|
- Handle disconnects in OMAPI a little bit more intelligently (so that
|
|
the caller gets ECONNRESET instead of EINVAL).
|
|
|
|
- Fix a bunch of bugs in the handling of clients that have existing
|
|
leases when the try to renew their leases while failover is
|
|
operating.
|
|
|
|
Changes since 3.0 Release Candidate 6
|
|
|
|
- Fix a core dump that could happen when processing a DHCPREQUEST from
|
|
a client that had a host declaration that contained both a
|
|
fixed-address declaration and a dhcp-client-identifier option
|
|
declaration, if the client identifier was longer than nine bytes.
|
|
|
|
- Fix a memory leak that could happen in certain obscure cases when
|
|
using omapi to manipulate leases.
|
|
|
|
- Fix some bugs and omissions in omshell.
|
|
|
|
|
|
Changes since 3.0 Release Candidate 5
|
|
|
|
- Fix a bug in omapi_object_dereference that prevented objects in
|
|
chains from having their reference counts decreased on dereference.
|
|
|
|
- Fix a bug in omapi_object_dereference that would prevent object
|
|
chains from being freed upon removal of the last reference external
|
|
to the chain.
|
|
|
|
- Fix a number of other memory leaks in the OMAPI protocol subsystem.
|
|
|
|
- Add code in the OMAPI protocol handler to trace memory leakage.
|
|
|
|
- Clean up the memory allocation/reference history printer.
|
|
|
|
- Support input of dotted quads and colon-separated hex lists as
|
|
attribute values in omshell.
|
|
|
|
- Fix a typo in the Linux interface discovery code.
|
|
|
|
- Conditionalize a piece of trace code that wasn't conditional.
|
|
|
|
Changes since 3.0 Release Candidate 4
|
|
|
|
- Fix a bug that would prevent leases from being abandoned properly on
|
|
DHCPDECLINE.
|
|
|
|
- Fix failover peer OMAPI support.
|
|
|
|
- In failover, correctly handle expiration of leases. Previously,
|
|
leases would never be reclaimed because they couldn't make the
|
|
transition from EXPIRED to FREE.
|
|
|
|
- Fix some broken failover state transitions.
|
|
|
|
- Documentation fixes.
|
|
|
|
- Take out an unnecessary check in DHCP relay agent information option
|
|
stashing code that was preventing REBINDING clients from rebinding.
|
|
|
|
- Prevent failover peers from allocating leases in DHCPREQUEST
|
|
processing if the lease belongs to the other server.
|
|
|
|
- Record server version in lease file introductory comment.
|
|
|
|
- Correctly report connection errors in OMAPI and failover.
|
|
|
|
- Make authentication signature algorithm name comparisons in OMAPI
|
|
case-insensitive.
|
|
|
|
- Fix compile problem on SunOS 4.x
|
|
|
|
- If a signature algorithm is not terminated with '.', terminate it so
|
|
that comparisons between fully-qualified names will work
|
|
consistently.
|
|
|
|
- Different SIOCGIFCONF probe code, may "fix" problem on some Linux
|
|
systems with the probe not working correctly.
|
|
|
|
- Don't allow user to type omapi key on command line of omshell.
|
|
|
|
Changes since 3.0 Release Candidate 3
|
|
|
|
- Do lease billing on startup in a way that I *think* will finally do
|
|
the billing correctly - the previous method could overbill as a
|
|
result of duplicate leases.
|
|
|
|
- Document OMAPI server objects.
|
|
|
|
Changes since 3.0 Release Candidate 2 Patchlevel 1
|
|
|
|
- Fix some problems in the DDNS update code. Thanks to Albert
|
|
Herranz for figuring out the main problem.
|
|
|
|
- Fix some reference counting errors on host entries that were causing
|
|
core dumps.
|
|
|
|
- Fix a byte-swap bug in the token ring code, thanks to Jochen
|
|
Friedrich.
|
|
|
|
- Fix a bug in lease billing, thanks to Jonas Bulow.
|
|
|
|
Changes since 3.0 Release Candidate 2
|
|
|
|
- Change the conditions under which a DHCPRELEASE is actually
|
|
committed to be consistent with lease binding states rather than
|
|
using the lease end time. This may fix some problems with the
|
|
billing class code.
|
|
|
|
- Fix a bug where lease updates would fail on Digital Unix (and maybe
|
|
others) because malloc was called with a size of zero.
|
|
|
|
- Fix a core dump that happens when the DHCP server can't create its
|
|
trace file.
|
|
|
|
Changes since 3.0 Release Candidate 1 Patchlevel 1
|
|
|
|
- Fix the dhcp_failover_put_message to not attempt to allocate a
|
|
zero-length buffer. Some versions of malloc() fail if you try to
|
|
allocate a zero-length buffer, and this was causing problems on,
|
|
e.g., Digital Unix.
|
|
|
|
- Fix a case where the failover code was printing an error message
|
|
when no error had occurred.
|
|
|
|
- Fix a problem where when a server went down and back up again, the
|
|
peer would not see a state transition and so would stay in the
|
|
non-communicating state.
|
|
|
|
- Be smart about going into recover_wait.
|
|
|
|
- Fix a problem in the failover implementation where peers would fail
|
|
to come into sync if interrupted in the RECOVER state. This could
|
|
have been the cause of some problems people have reported recently.
|
|
|
|
- Fix a problem with billing classes where they would not be unbilled
|
|
when the client lease expired.
|
|
|
|
- If select fails, figure out which descriptor is bad, and cut it out
|
|
of the I/O loop. This prevents a potentially nasty spin. I
|
|
haven't heard any report it in a while, but it came up consistently
|
|
in testing.
|
|
|
|
- Fix a bug in the relay agent where if you specified interfaces on
|
|
the command line, it would fail.
|
|
|
|
- Fix a couple of small bugs in the omapi connection object (no known
|
|
user impact).
|
|
|
|
- Add the missing 3.0 Beta 1 lease conversion script.
|
|
|
|
- Read dhcp client script hooks if they exist, rather than only if
|
|
they're executable.
|
|
|
|
Changes since 3.0 Release Candidate 1
|
|
|
|
- Fix a memory smash that happens when fixed-address leases are used.
|
|
ANY SITE AT WHICH FIXED-ADDRESS STATEMENTS ARE BEING USED SHOULD
|
|
UPGRADE IMMEDIATELY. This has been a long-standing bug - thanks to
|
|
Alvise Nobile for discovering it and helping me to find it!
|
|
|
|
- Fix a small bug in binary-to-ascii, thanks to H. Peter Anvin of
|
|
Transmeta.
|
|
|
|
- There is a known problem with the DHCP server doing failover on
|
|
Compaq Alpha systems. This patchlevel is not a release candidate
|
|
because of this bug. The bug should be straightforward to fix, so
|
|
a new release candidate is expected shortly.
|
|
|
|
- There is a known problem in the DDNS update code that is probably a
|
|
bug, and is not, as far as we know, fixed in this patchlevel.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 24
|
|
|
|
- Went over problematic failover state transitions and made them all
|
|
work, so that failover should now much less fragile.
|
|
|
|
- Add some dhcpctl and omapi documentation
|
|
|
|
- Fix compile errors when compiling with unusual predefines.
|
|
|
|
- Make Token Ring work on Linux 2.4
|
|
|
|
- Fix the Digital Unix BPF_WORDALIGN bug.
|
|
|
|
- Fix some dhcp client documentation errors.
|
|
|
|
- Update some parts of the README file.
|
|
|
|
- Support GCC on SCO.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 23
|
|
|
|
- Fix a bug in the DNS update code where a status code was not being
|
|
checked. This may have been causing core dumps.
|
|
|
|
- When parsing the lease file, if a lease declaration includes a
|
|
billing class statement, and the lease already has a billing class,
|
|
unbill the old class.
|
|
|
|
- When processing failover transactions, where acks will be deferred,
|
|
process the state transition immediately.
|
|
|
|
- Don't try to use the new SIOCGIFCONF buffer size detection code on
|
|
Linux 2.0, which doesn't provide this functionality.
|
|
|
|
- Apply a patch suggested by Tuan Uong for a problem in dlpi.c.
|
|
|
|
- Fix a problem in using the which command in the configure script.
|
|
|
|
- Fix a parse error in the client when setting up an omapi listener.
|
|
|
|
- Document the -n and -g flags to the client.
|
|
|
|
- Make sure there is always a stdin and stdout on startup. This
|
|
prevents shell scripts from accidentally writing error messages into
|
|
configuration files that happen to be opened as stderr.
|
|
|
|
- If an interface is removed, the client will now notice that it is
|
|
gone rather than spinning. This has only been tested on NetBSD.
|
|
|
|
- The client will attempt to get an address even if it can't create a
|
|
lease file.
|
|
|
|
- Don't overwrite tracefiles.
|
|
|
|
- Fix some memory allocation bugs in failover.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 22
|
|
|
|
- Apply some patches suggested by Cyrille Lefevre, who is maintaining
|
|
the FreeBSD ISC DHCP Distribution port.
|
|
|
|
- Fix a core dump in DHCPRELEASE.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 21
|
|
|
|
- This time for sure: fix the spin described in the changes for pl20.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 20
|
|
|
|
- Fix a problem with Linux detecting large numbers of interfaces (Ben)
|
|
|
|
- Fix a memory smash in the quotify code, which was introduced in
|
|
pl19.
|
|
|
|
- Actually fix the spin described in the changes for pl20. The
|
|
previous fix only partially fixed the problem - enough to get it
|
|
past the regression test.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 19
|
|
|
|
- Fix a bug that could cause the server to abort if compiled with
|
|
POINTER_DEBUG enabled.
|
|
|
|
- Fix a bug that could cause the server to spin when responding to a
|
|
DHCPREQUEST.
|
|
|
|
- Apply Joost Mulders' suggested patches for DLPI on x86.
|
|
|
|
- Support NUL characters in quoted strings.
|
|
|
|
- Install unformatted man pages on SunOS.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 18
|
|
|
|
- Allow the server to be placed in partner-down state using OMAPI.
|
|
(Damien Neil)
|
|
|
|
- Implement omshell, which can be used to do arbitrary things to the
|
|
server (in theory). (Damien Neil)
|
|
|
|
- Fix a case where if a client had two different leases the server could
|
|
actually dereference the second one when it hadn't been referenced,
|
|
leading to memory corruption and a core dump. (James Brister)
|
|
|
|
- Fix a case where a client could request the address of another client's
|
|
lease, but find_lease wouldn't detect that the other client had it, and
|
|
would attempt to allocate it to the client, resulting in a lease conflict
|
|
message.
|
|
|
|
- Fix a case where a client with more than one client identifier could be
|
|
given a lease where the hardware address was correct but the client
|
|
identifier was not, resulting in a lease conflict message.
|
|
|
|
- Fix a problem where the server could write out a colon-separated
|
|
hex list as a value for a variable, which would then not parse.
|
|
The fix is to always write strings as quoted strings, with any
|
|
non-printable characters quoted as octal escape sequences. So
|
|
a file written the old way still won't work, but new files written
|
|
this way will work.
|
|
|
|
- Fix documentation for sending non-standard options.
|
|
|
|
- Use unparsable names for unknown options. WARNING: this will
|
|
break any configuration files that use the option-nnn convention.
|
|
If you want to continue to use this convention for some options,
|
|
please be sure to write a definition, like this:
|
|
|
|
option option-nnn code nnn = string;
|
|
|
|
You can use a descriptive name instead of option-nnn if you like.
|
|
|
|
- Fix a problem where we would see a DHCPDISCOVER/DHCPOFFER/
|
|
DHCPREQUEST/DHCPACK/DHCPREQUEST/DHCPNAK sequence. This was the
|
|
result of a deceptively silly bug in supersede_lease.
|
|
|
|
- Fix client script exit status check, according to a fix supplied by
|
|
Hermann Lauer.
|
|
|
|
- Fix an endianness bug in the tracefile support, regarding ICMP
|
|
messages.
|
|
|
|
- Fix a bug in the client where the medium would not work correctly if
|
|
it contained quoted strings.
|
|
|
|
** there was no pl17 **
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 16
|
|
|
|
- Add support for transaction tracing. This allows the state of the
|
|
DHCP server on startup, and all the subsequent transactions, to be
|
|
recorded in a file which can then be played back to reproduce the
|
|
behaviour of the DHCP server. This can be used to quickly
|
|
reproduce bugs that cause core dumps or corruption, and also for
|
|
tracking down memory leaks.
|
|
|
|
- Incorporate some bug fixes provided by Joost Mulders for the DLPI
|
|
package which should clear up problems people have been seeing on
|
|
Solaris.
|
|
|
|
- Fix bugs in the handling of options stored as linked lists (agent
|
|
options, fqdn options and nwip options) that could cause memory
|
|
corruption and core dumps.
|
|
|
|
- Fix a bug in DHCPREQUEST handling that resulted in DHCPNAK messages
|
|
not being send in some cases when they were needed.
|
|
|
|
- Make the lease structure somewhat more compact.
|
|
|
|
- Make initial failover startup *much* faster. This was researched
|
|
and implemented by Damien Neil.
|
|
|
|
- Add a --version flag to all executables, which prints the program
|
|
name and version to standard output.
|
|
|
|
- Don't rewrite the lease file every thousand leases.
|
|
|
|
- A bug in nit.c for older SunOS machines was fixed by a patch sent in
|
|
by Takeshi Hagiwara.
|
|
|
|
- Fix a memory corruption bug in the DHCP client.
|
|
|
|
- Lots of documentation updates.
|
|
|
|
- Add a feature allowing environment variables to be passed to the
|
|
DHCP client script on the DHCP client command line.
|
|
|
|
- Fix client medium support, which had been broken for some time.
|
|
|
|
- Fix a bug in the DHCP client initial startup backoff interval, which
|
|
would cause two DHCPDISCOVERS to be sent back-to-back on startup.
|
|
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 15
|
|
|
|
- Some documentation tweaks.
|
|
|
|
- Maybe fix a problem in the DLPI code.
|
|
|
|
- Fix some error code space inconsistencies in ddns update code.
|
|
|
|
- Support relay agents that intercept unicast DHCP messages to stuff
|
|
agent options into them.
|
|
|
|
- Fix a small memory leak in the relay agent option support code.
|
|
|
|
- Fix a core dump that would occur if a packet was sent with no
|
|
options.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 14
|
|
|
|
- Finish fixing a long-standing bug in the agent options code. This
|
|
was causing core dumps and failing to operate correctly - in
|
|
particular, agent option stashing wasn't working. Agent option
|
|
stashing should now be working, meaning that agent options can be
|
|
used in class statements to control address allocation.
|
|
|
|
- Fix up documentation.
|
|
|
|
- Fix a couple of small memory leaks that would have added up
|
|
significantly in a high-demand situation.
|
|
|
|
- Add a log-facility configuration parameter.
|
|
|
|
- Fix a compile error on some older operating systems.
|
|
|
|
- Add the ability in the client to execute certain statements before
|
|
transmitting packets to the server. Handy for debugging; not much
|
|
practical use otherwise.
|
|
|
|
- Don't send faked-out giaddr when renewing or bound - again, useful
|
|
for debugging.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 13
|
|
|
|
- Fixed a problem where the fqdn decoder would sometimes try to store
|
|
an option with an (unsigned) negative length, resulting in a core
|
|
dump on some systems.
|
|
|
|
- Work around the Win98 DHCP client, which NUL-terminates the FQDN
|
|
option.
|
|
|
|
- Work around Win98 and Win2k clients that will claim they want to do
|
|
the update even when they don't have any way to do it.
|
|
|
|
- Fix some log messages that can be printed when failover is operating
|
|
that were not printing enough information.
|
|
|
|
- It was possible for a DHCPDISCOVER to get an allocation even when
|
|
the state machine said the server shouldn't be responding.
|
|
|
|
- Don't load balance DHCPREQUESTs from clients in RENEWING and
|
|
REBINDING, since in RENEWING, if we heard it, it's for us, and in
|
|
REBINDING, the client wouldn't have got to REBINDING if its primary
|
|
were answering.
|
|
|
|
- When we get a bogus state lease binding state transition, don't do
|
|
the transition.
|
|
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 12
|
|
|
|
- Fixed a couple of silly compile errors.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 11
|
|
|
|
- Albert Herranz tracked down and fixed a subtle bug in the base64
|
|
decoder that would prevent any key with an 'x' in its base64
|
|
representation from working correctly.
|
|
|
|
- Thanks to Chris Cheney and Michael Sanders, we have a fix for the
|
|
hang that they both spotted in the DHCP server - when
|
|
one-lease-per-client was set, the code to release the "other" lease
|
|
could spin.
|
|
|
|
- Fix a problem with alignment of the input buffer in bpf in cases
|
|
where two packets arrive in the same bpf read.
|
|
|
|
- Fix a problem where the relay agent would crash if you specified an
|
|
interface name on the command line.
|
|
|
|
- Add the ability to conditionalize client behaviour based on the
|
|
client state.
|
|
|
|
- Add support for the FQDN option, and added support for a new way of
|
|
doing ddns updates (ddns update style interim) that allows more than
|
|
one DHCP server to update the DNS for the same network(s). This
|
|
was implemented by Damien Neil with some additional functionality
|
|
added by Ted Lemon.
|
|
|
|
- Damien added a "log" statement, so that the configuration file can
|
|
be made to log debugging information and other information.
|
|
|
|
- Fixed a bug that caused option buffers not to be terminated with an
|
|
end option.
|
|
|
|
- Fixed a long-standing bug in the support for option spaces where the
|
|
options are stored as an ordered list rather than in a hash table,
|
|
which could theoretically result in memory pool corruption.
|
|
|
|
- Prevent hardware declarations with no actual hardware address from
|
|
being written as something unparsable, and behave correctly in the
|
|
face of a null hardware address on input.
|
|
|
|
- Allow key names to be FQDNs, and qualify the algorithm name if it is
|
|
specified unqualified.
|
|
|
|
- Modify the DDNS update code so that it never prints the "resolver
|
|
failed" message, but instead says *why* the resolver failed.
|
|
|
|
- Officially support the subnet selection option, which now has an
|
|
RFC.
|
|
|
|
- Fix a build bug on MacOS X.
|
|
|
|
- Allow administrator to disable ping checking.
|
|
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- Clean up dhcpd.conf documentation and add more information about how
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it works.
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Changes since 3.0 Beta 2 Patchlevel 10
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- Fix a bug introduced during debugging (!) and accidentally committed
|
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to CVS.
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Changes since 3.0 Beta 2 Patchlevel 9
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- Fix DHCP client handling of vendor encapsulated options.
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|
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- Fix a bug in the handling of relay agent information options introduced
|
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in patchlevel 9.
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- Stash agent options on client leases by default, and use the stashed
|
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options at renewal time.
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- Add the ability to test the client's binding state in the client
|
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configuration language.
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|
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- Fix a core dump in the DNS update code.
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|
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- Fix some expression evaluation bugs that were causing updates to be
|
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done when no client hostname was received.
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|
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- Fix expression evaluation debugging printfs.
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|
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- Teach pretty_print_option to print options in option spaces other than
|
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the DHCP option space.
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|
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- Add a warning message if the RHS of a not is not boolean.
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|
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- Never select for more than a day, because some implementations of
|
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select will just fail if the timeout is too long (!).
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|
|
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- Fix a case where a DHCPDISCOVER from an unknown network would be
|
|
silently dropped.
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|
|
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- Fix a bug where if a client requested an IP address for which a different
|
|
client had the lease, the DHCP server would reallocate it anyway.
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|
|
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- Fix the DNS update code so that if the client changes its name, the DNS
|
|
will be correctly updated.
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|
|
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Changes since 3.0 Beta 2 Patchlevel 8
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|
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- Oops, there was another subtle math error in the header-length
|
|
bounds-checking.
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|
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Changes since 3.0 Beta 2 Patchlevel 7
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|
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- Oops, forgot to byte-swap udp header length before bounds-checking it.
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|
|
Changes since 3.0 Beta 2 Patchlevel 6
|
|
|
|
- Fix a possible DoS attack where a client could cause the checksummer
|
|
to dump core. This was a read, not a write, so it shouldn't be
|
|
possible to exploit it any further than that.
|
|
|
|
- Implement client- and server-side support for using the Client FQDN
|
|
option.
|
|
|
|
- Support for other option spaces in the client has been added. This
|
|
means that it is now possible to define a vendor option space on the
|
|
client, request options in that space from the server (which must
|
|
define the same option space), and then use those options in the
|
|
client. This also allows NWIP and Client FQDN options to be used
|
|
meaningfully.
|
|
|
|
- Add object initializer support. This means that objects can now be
|
|
initialized to something other than all-zeros when allocated, which
|
|
makes, e.g., the interface object support code a little more robust.
|
|
|
|
- Fix an off-by-one bug in the host stuffer. This was causing host
|
|
deletes not the work, and may also have been causing OMAPI
|
|
connections to get dropped. Thanks to James Brister for tracking
|
|
this one down!
|
|
|
|
- Fixed a core dump in the interface discovery code that is triggered
|
|
when there is no subnet declaration for an interface, but the server
|
|
decides to continue running. Thanks to Shane Kerr for tracking
|
|
down and fixing this problem.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 5
|
|
|
|
- Fix a bug in the recent enhancement to the interface discovery code
|
|
to support arbitrary-length interface lists.
|
|
|
|
- Support NUL-terminated DHCP options when initializing client-script
|
|
environment.
|
|
|
|
- Fix suffix operator.
|
|
|
|
- Fix NetWare/IP option parsing.
|
|
|
|
- Better error/status checking in dhcpctl initialization and omapi
|
|
connection code.
|
|
|
|
- Fix a potential memory smash in dhcpctl code.
|
|
|
|
- Fix SunOS4 and (maybe) Ultrix builds.
|
|
|
|
- Fix a bug where a certain sort of incoming packet could cause a core
|
|
dump on Solaris (and probably elsewhere).
|
|
|
|
- Add some more safety checks in error logging code.
|
|
|
|
- Add support for ISC_R_INCOMPLETE in OMAPI protocol connection code.
|
|
|
|
- Fix relay agent so that if an interface is specified on the command
|
|
line, the relay agent does not dump core.
|
|
|
|
- Fix class matching so that match if can be combined with match or
|
|
spawn with.
|
|
|
|
- Do not allow spurious leases in the lease database to introduce
|
|
potentially bogus leases into the in-memory database.
|
|
|
|
- Fix a byte-order problem in the client hardware address type code
|
|
for OMAPI.
|
|
|
|
- Be slightly less picky about what sort of hardware addresses OMAPI
|
|
can install in host declarations.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 4
|
|
|
|
- Incorporated Peter Marschall's proposed change to array/record
|
|
parsing, which allows things like the slp-agent option to be encoded
|
|
correctly. Thanks very much to Peter for taking the initiative to
|
|
do this, and for doing such a careful job of it (e.g., updating the
|
|
comments)!
|
|
|
|
- Added an encoding for the slp-agent option. :')
|
|
|
|
- Fixed SunOS 4 build. Thanks to Robert Elz for responding to my
|
|
request for help on this with patches!
|
|
|
|
- Incorporated a change that should fix a problem reported by Philippe
|
|
Jumelle where when the network connection between two servers is
|
|
lost, they never reconnect.
|
|
|
|
- Fix client script files other than that for NetBSD to actually use
|
|
make_resolv_conf as documented in the manual page.
|
|
|
|
- Fix a bug in the packet handling code that could result in a core
|
|
dump.
|
|
|
|
- Fix a bug in the bootp code where responses on the local net would
|
|
be sent to the wrong MAC address. Thanks to Jerry Schave for
|
|
catching this one.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 3
|
|
|
|
- In the DHCP client, execute client statements prior to using the values
|
|
of options, so that the client configuration can overried, e.g., the
|
|
lease renewal time.
|
|
|
|
- Fix a reference counting error that would result in very reproducible
|
|
failures in updates, as well as occasional core dumps, if a zone was
|
|
declared without a key.
|
|
|
|
- Fix some Linux 2.0 compilation problems.
|
|
|
|
- Fix a bug in scope evaluation during execution of "on" statements that
|
|
caused values not to be recorded on leases.
|
|
|
|
- If the dhcp-max-message-size option is specified in scope, and the
|
|
client didn't send this option, use the one specified in scope to
|
|
determine the maximum size of the response.
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 2
|
|
|
|
- Fix a case where spawning subclasses were being allocated
|
|
incorrectly, resulting in a core dump.
|
|
|
|
- Fix a case where the DHCP server might inappropriately NAK a
|
|
RENEWING client.
|
|
|
|
- Fix a place dhcprequest() where static leases could leak.
|
|
|
|
- Include memory.h in omapip_p.h so that we don't get warnings about
|
|
using memcmp().
|
|
|
|
Changes since 3.0 Beta 2 Patchlevel 1
|
|
|
|
- Notice when SIOCFIGCONF returns more data than fit in the buffer -
|
|
allocate a larger buffer, and retry. Thanks to Greg Fausak for
|
|
pointing this out.
|
|
|
|
- In the server, if no interfaces were configured, report an error and
|
|
exit.
|
|
|
|
- Don't ever record a state of 'startup'.
|
|
|
|
- Don't try to evaluate the local failover binding address if none was
|
|
specified. Thanks to Joseph Breu for finding this.
|