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author | Ted Lemon <source@isc.org> | 1997-11-22 08:18:16 +0000 |
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committer | Ted Lemon <source@isc.org> | 1997-11-22 08:18:16 +0000 |
commit | 392cddfe1ee11ec4868dc2b75ea9ac12ae54efcc (patch) | |
tree | 50139a1ef6487253812436fc2c7ce6471440b0a5 /RELNOTES | |
parent | d3333a745934c03b857035db4e27ee16f3331e34 (diff) | |
download | isc-dhcp-392cddfe1ee11ec4868dc2b75ea9ac12ae54efcc.tar.gz |
Update release notes (lose obsolete cruft about old lease database formats)
Diffstat (limited to 'RELNOTES')
-rw-r--r-- | RELNOTES | 231 |
1 files changed, 42 insertions, 189 deletions
@@ -1,204 +1,57 @@ Internet Software Consortium - Dynamic Host Configuration Protocol Server - Beta Release 5 - August 29, 1996 + Dynamic Host Configuration Protocol Distribution + Development Snapshot + November 22, 1997 Release Notes - !!!!!!! IMPORTANT !!!!!!! +This is the final development snapshot before Version 2 of the +Internet Software Consortium DHCP Distribution goes to beta. +Development snapshots after this one will be for Version 3 of the ISC +DHCP Server. - THE FORMAT OF THE dhcpd.conf AND dhcpd.leases FILES HAS CHANGED! +New in this snapshot: - !!!!!!! IMPORTANT !!!!!!! + - more manual pages + - lots of minor and some major bug fixes. -If you are currently using dhcpd Beta 4 Patchlevel 7 or earlier, YOU -MUST CONVERT YOUR LEASE DATABASE AND CONFIGURATION FILES before -running the new version of DHCPD. At best, dhcpd will not work. At -worst, the lease database could be erased. +This snapshot is being released in the hopes that a fair number of +DHCP sites will download it, try it out, and submit bug reports and +critique the new manual pages. Please do not hold back - the plan is +to cut the first Beta release in about two weeks - at the beginning of +December. -To convert your dhcpd.leases and dhcpd.conf files, make a backup copy -of each file and then run the dhcpxlt command with the old config file -as input and the new config file as output. For example: +Version 1 of the ISC DHCP Distribution included just a DHCP Server. +As of this writing, the most recent Version 1 distribution is Beta 5 +Patchlevel 16. One more patchlevel is planned before Version 1.0 is +finalized. This is the release that we would expect most sites to run +in production. - mv /etc/dhcpd.conf /etc/dhcpd.conf.old - ./dhcpxlt </etc/dhcpd.conf.old >/etc/dhcpd.conf - mv /var/db/dhcpd.leases /var/db/dhcpd.leases.old - ./dhcpxlt </var/db/dhcpd.leases.old >/var/db/dhcpd.leases +Version 2 of the ISC DHCP Distribution adds a DHCP Client and a +DHCP/BOOTP Relay Agent to the DHCP Server that was offered in version +1.0. In addition, some new capabilities have been added to the +server: -The dhcpxlt command has been tested and appears to work, but it is -brand new and has only been tested by one person - me - at one site - -mine. Unfortunately, my site is relatively simple, so there's a -decent chance that I've overlooked something. Please proceed with -caution. + - IP addresses are now tested before they are assigned to + clients. This allows the DHCP server to detect rogue + machines that may have hijacked IP addresses before an IP + address conflict can occur. - NEW FEATURES + - The server may be configured so that some DHCP clients can + be excluded from booting. - NEW CONFIG FILE FORMAT +This version is fairly stable at this time, and will soon be +moved to the "stable" track. It has a number of new features, and is +the release that we would expect sites that want some stability but +need the new pinging feature, or need a client or relay agent (but +note that you can run the Version 1 server alongside the Version 2 +client and relay agent). -Obviously, the first new feature is that the configuration file -formats have been changed. The old format was a major source of -confusion for new users. The new format uses braces for nesting and -semicolons to end every statement, so what in the old version looked -like: +Version 3 of the ISC DHCP Distribution will add Dynamic DNS Support, +asynchronous DNS query resolution, DHCP Authentication, and possibly +support for a DHCP Interserver Protocol and live querying of the DHCP +database. This release is not expected to be stable in the near +future, and is intended for sites that are in a position to +experiment, or for sites that desperately need the new features. -shared-network FOO - option domain-name "fugue.com" - subnet 204.254.239.0 netmask 255.255.255.224 - option routers 204.254.239.1 - subnet 205.254.239.32 netmask 255.255.255.224 - option routers 204.254.239.33; -Now looks like: - -shared-network FOO { - option domain-name "fugue.com"; - subnet 204.254.239.0 netmask 255.255.255.224 { - option routers 204.254.239.1; - } - subnet 205.254.239.32 netmask 255.255.255.224 { - option routers 204.254.239.33; - } -} - -I'm hoping that this will reduce confusion somewhat. - -In addition to changing the file format, I've also documented it -(finally)! The definitive documentation is in dhcpd.conf.5, and gives -a complete and hopefully fairly readable description of the syntax, -along with examples and a reference section. - -Also, the parser should now report line numbers correctly. Instead -of reporting the character position at which the offending token -starts, it now prints the line containing the offending token with an -arrow pointing at that token. - -Hostnames may now begin with numbers - previously, a hostname like -1Q7.isc.org would not have been allowed. - -Dhcpd will now exit if errors are found in the config file - before, -it would try to press on. I added this so that dhcpd would not even -try to read the dhcpd.leases file if the config file was broken. - - README FILE UPDATED - -Please take a look at the new README file - it's been brought forward -into the 20th century. - - QNX SUPPORT - -Brian Stecher of Watcom has donated configuration code for the QNX -operating system. - - MAKEFILE FUN - -Several people donated clean targets for the Makefile. The idea -being that you type ``make clean'', and all the object files are -removed. I added the target I liked best (donated by Mark Sirota). - - DYNAMIC BOOTP LEASES - -Mark also suggested a change that would set the expiry date on leases -for Dynamic BOOTP clients to something other than infinity. Two -different keywords have been added so that you can set either a cutoff -date or just a shorter lease length. - - MEMORY ALLOCATION ZAPPED - -A lot of bugs cropped up in Beta 4 having to do with uninitialized -allocated memory. I finally gave up and put code in the allocator to -just zero out every hunk of memory that gets allocated. Ugly, but -probably worthwhile. - - NEW GROUP DECLARATION - -Several users have asked for the ability to define client groupings -with common boot parameters which don't correspond with subnet -boundaries. This would be useful for a LAN where several departments -are spread out so that each department has some machines on one subnet -and some machines on another. It would also be useful for grouping -particular kinds of hardware together. The syntax looks like this: - - group { - option domain-name "accounting.isc.org"; - - host foo {...} - host bar {...} - host baz {...} - } - - NEXT BOOT SERVER SUPPORT - -DHCP and BOOTP clients often need to load a kernel using TFTP or NFS -once they've configured their network interface. If your TFTP or NFS -server was the same as your DHCP server, this worked fine, but -otherwise, there was no way to boot. The next-server parameter now -allows you to specify the address of the server from which the boot -file should be loaded. - - RESTRICTED DHCP - -It is now possible to restrict access to dynamic addresses using the -boot-unknown-clients parameter. If boot-unknown-clients is turned -off on a given network, dhcpd will only provide addresses to clients -for which host entries exist. - - DEBUGGING - -It is now possible to start dhcpd without having it immediately go -into the background, using the -f option. This is handy for running -under a debugger or for running dhcpd out of /etc/inittab. It is -also possible to get a normally-compiled version of dhcpd to log its -debugging information to standard error as well as to syslogd, using -the -d flag. - - HOSTNAMES - -Dhcpd now looks up the hostnames for each address in the allocation -pool using gethostbyaddr. If a hostname option was not specified for -a client, the name is taken from the name of the client's host -declaration, if there is one. Otherwise, it's taken from the domain -name associated with the address being assigned to the client. This -only affects clients that want to learn their hostnames from the -server. - - DHCPD.PID FILE WRITTEN SOONER - -One user complained that the dhcpd.pid file was being written after -the lease database was loaded, and this could take a very significant -amount of time. Dhcpd now reads the pid file before loading the -database, and if no server is running on that pid, dhcpd rewrites the -pid file immediately. There are still race conditions here, but this -should improve things somewhat. - - LOOPBACK AND POINT-TO-POINT INTERFACES AUTOMATICALLY ELIMINATED - -I have added code which works everywhere I've tested it so far to -determine what kind of network connection each identified interface -provides, and to ignore any interface claiming to be a loopback -interface or a point-to-point interface. I am somewhat concerned -that this code may fail on Linux, but it should work on BSD-derived -TCP stacks, which are present on most Unix systems. - - NUMEROUS BUG FIXES - -Beta 4 Patchlevel 7 was not a very successful release, mostly because -I had to do it from Montreal over an X terminal, and so I wasn't able -to test it. A bunch of bugs introduced in Beta 4.7 have been fixed, -including: - - - NIT no longer consumes excessive resources on SunOS - - NIT no longer fails on SunOS versions prior to 4.1.4. - - Mobile hosts should no longer corrupt the in-memory lease - database (I can't test this here - please let me know) - - DHCPD no longer gets infinite BOOTREQUESTs when booting - BOOTP clients on the other side of a BOOTP gateway. - - DHCPD should dump core less often - a lot of bogus pointer - dereferences have been fixed. - - IP aliases should now be handled correctly on Linux - machines. It would be nice if somebody could test this - I - can't. - - Lease times are now printed using printf and read in using a - hand-coded conversion routine. As a result, dhcpd no - longer puts GMT times on syslog messages. - - The lease database code is more robust (I don't know if this - ever caused any problems). |