204 lines
7.3 KiB
Plaintext
204 lines
7.3 KiB
Plaintext
Internet Software Consortium DHCP Distribution
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Version 3, Beta 2, Patchlevel 9
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October 15, 2000
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Release Notes
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This is a development snapshot of Version 3 of the Internet Software
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Consortium DHCP Distribution.
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NEW FEATURES
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Version 3, Beta 2 of the ISC DHCP Distribution includes the following
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features 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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This beta release is quite new, and is running in production at only a
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few sites. We strongly recommend that you exercise caution in
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installing it. The 3.0 Beta 2 lease file is not backwards compatible
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with the 3.0 Beta 1 lease file, so if you have to go back, you will
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have to convert your lease files back to the 3.0 Beta 1 format - if
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you try to run a 3.0 Beta 1 server on a 3.0 Beta 2 lease file, it will
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cheerfully delete all your leases. Having said that, of course the
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way that new releases of open source software become stable is by
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people using them, finding the bugs, and reporting the bugs. So
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while we urge you to exercise caution, we would also appreciate any
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testing or production use you can safely do.
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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 Perkin-Elmer, Irina Goble at Integrated
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Measurement Systems, and Brian Murrell at BC Tel Advanced
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Communications. I'd like to express my thanks to all of these good
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people here, both for working on the code and for prodding me into
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improving it.
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Changes since 3.0 Beta 2 Patchlevel 8
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- Oops, there was another subtle math error in the header-length
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bounds-checking.
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Changes since 3.0 Beta 2 Patchlevel 7
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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
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- Fix a possible DoS attack where a client could cause the checksummer
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to dump core. This was a read, not a write, so it shouldn't be
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possible to exploit it any further than that.
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- Implement client- and server-side support for using the Client FQDN
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option.
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- Support for other option spaces in the client has been added. This
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means that it is now possible to define a vendor option space on the
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client, request options in that space from the server (which must
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define the same option space), and then use those options in the
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client. This also allows NWIP and Client FQDN options to be used
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meaningfully.
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- Add object initializer support. This means that objects can now be
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initialized to something other than all-zeros when allocated, which
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makes, e.g., the interface object support code a little more robust.
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- Fix an off-by-one bug in the host stuffer. This was causing host
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deletes not the work, and may also have been causing OMAPI
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connections to get dropped. Thanks to James Brister for tracking
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this one down!
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- Fixed a core dump in the interface discovery code that is triggered
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when there is no subnet declaration for an interface, but the server
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decides to continue running. Thanks to Shane Kerr for tracking
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down and fixing this problem.
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Changes since 3.0 Beta 2 Patchlevel 5
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- Fix a bug in the recent enhancement to the interface discovery code
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to support arbitrary-length interface lists.
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- Support NUL-terminated DHCP options when initializing client-script
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environment.
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- Fix suffix operator.
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- Fix NetWare/IP option parsing.
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- Better error/status checking in dhcpctl initialization and omapi
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connection code.
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- Fix a potential memory smash in dhcpctl code.
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- Fix SunOS4 and (maybe) Ultrix builds.
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- Fix a bug where a certain sort of incoming packet could cause a core
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dump on Solaris (and probably elsewhere).
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- Add some more safety checks in error logging code.
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- Add support for ISC_R_INCOMPLETE in OMAPI protocol connection code.
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- Fix relay agent so that if an interface is specified on the command
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line, the relay agent does not dump core.
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- Fix class matching so that match if can be combined with match or
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spawn with.
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- Do not allow spurious leases in the lease database to introduce
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potentially bogus leases into the in-memory database.
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- Fix a byte-order problem in the client hardware address type code
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for OMAPI.
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- Be slightly less picky about what sort of hardware addresses OMAPI
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can install in host declarations.
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Changes since 3.0 Beta 2 Patchlevel 4
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- Incorporated Peter Marschall's proposed change to array/record
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parsing, which allows things like the slp-agent option to be encoded
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correctly. Thanks very much to Peter for taking the initiative to
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do this, and for doing such a careful job of it (e.g., updating the
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comments)!
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- Added an encoding for the slp-agent option. :')
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- Fixed SunOS 4 build. Thanks to Robert Elz for responding to my
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request for help on this with patches!
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- Incorporated a change that should fix a problem reported by Philippe
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Jumelle where when the network connection between two servers is
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lost, they never reconnect.
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- Fix client script files other than that for NetBSD to actually use
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make_resolv_conf as documented in the manual page.
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- Fix a bug in the packet handling code that could result in a core
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dump.
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- Fix a bug in the bootp code where responses on the local net would
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be sent to the wrong MAC address. Thanks to Jerry Schave for
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catching this one.
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Changes since 3.0 Beta 2 Patchlevel 3
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- In the DHCP client, execute client statements prior to using the values
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of options, so that the client configuration can overried, e.g., the
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lease renewal time.
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- Fix a reference counting error that would result in very reproducible
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failures in updates, as well as occasional core dumps, if a zone was
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declared without a key.
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- Fix some Linux 2.0 compilation problems.
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- Fix a bug in scope evaluation during execution of "on" statements that
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caused values not to be recorded on leases.
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- If the dhcp-max-message-size option is specified in scope, and the
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client didn't send this option, use the one specified in scope to
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determine the maximum size of the response.
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Changes since 3.0 Beta 2 Patchlevel 2
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- Fix a case where spawning subclasses were being allocated
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incorrectly, resulting in a core dump.
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- Fix a case where the DHCP server might inappropriately NAK a
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RENEWING client.
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- Fix a place dhcprequest() where static leases could leak.
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- Include memory.h in omapip_p.h so that we don't get warnings about
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using memcmp().
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Changes since 3.0 Beta 2 Patchlevel 1
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- Notice when SIOCFIGCONF returns more data than fit in the buffer -
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allocate a larger buffer, and retry. Thanks to Greg Fausak for
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pointing this out.
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- In the server, if no interfaces were configured, report an error and
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exit.
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- Don't ever record a state of 'startup'.
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- Don't try to evaluate the local failover binding address if none was
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specified. Thanks to Joseph Breu for finding this.
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