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94 lines
2.9 KiB
Text
94 lines
2.9 KiB
Text
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Code Drop 2 Status Update
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Work since February has focused almost exclusively on the DNS library,
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especially on database implementation and resolver architecture. The
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DNS library now contains a transactional versioned database. In zone
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mode, the database supports multiple concurrent readers as well as a
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single in-progress abortable update (e.g. dynamic DNS or IXFR). In
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cache mode, multiple concurrent readers and writers are supported. We
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also have added interfaces for iterating the database, DNS
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compression, parsing and writing DNS messages. Our tree code now has
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support for bitstring labels (required for IPv6). DNS master file
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loading is more robust than in the first code drop.
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A significant amount of design and implementation work that we had
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hoped to do later in the project had to be done in the current time
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period. For example, both DNSSEC and IPv6 introduce DB and resolver
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complexities that are so fundamental that they could not be deferred
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until the time when we are actually implementing DNSSEC and IPv6
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support. As a result, we have less code implemented than we had
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hoped, but are ahead of plan on parts of the design.
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We are currently finalizing the resolver design, and will start
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implementing it soon. Also nearing completion, but not included in
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this release, are library data types representing zones, the cache,
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and a standard C structure form for each rdata type.
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Tests
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A basic test framework and a set of tests are included in this
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release. The tests are in
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bin/tests/master
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bin/tests/names
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bin/tests/rbt
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To run a test, 'cd' into its directory and type 'make test'.
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Result of the tests are appended to
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bin/tests/t_journal
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We expect the test suite to become richer over time.
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Building
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We've had successful builds and tests on the following systems
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BSDI 3.1
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Digital UNIX 4.0D
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HP-UX 11
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Red Hat Linux 5.2
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SGI IRIX 6.5
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Solaris 2.6
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To build, just
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./configure
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make
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Do not run 'make install'.
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Building with gcc is not supported, unless gcc is the vendor's usual
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compiler (e.g. the various BSD systems, Linux).
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IRIX note: you must edit lib/isc/Makefile.in changing
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pthreads/condition.o \
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@ISC_EXTRA_OBJS@
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to
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pthreads/condition.o @ISC_EXTRA_OBJS@
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before you run ./configure. Many compiler warnings, etc. are currently
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generated on IRIX. They will be cleaned up in a future release.
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bin/named Note
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Code in bin/named is for testing purposes only, and is not representative of
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the final architecture. Currently, it can load multiple zones and also
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a cache, and answer queries for those names. Because the server cannot
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recurse, and because it does not yet implement the full DNS protocol,
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it runs on port 5544, not port 53.
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API Note
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All APIs are subject to change in future code drops. We expect the
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existing library interfaces in the code drop to be quite stable,
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however, and unless we've specifically indicated that an interface is
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temporary, we don't expect significant changes in future releases.
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