75 lines
2.6 KiB
Plaintext
75 lines
2.6 KiB
Plaintext
$Id: TODO,v 1.10 2005/04/19 21:48:09 mjt Exp $
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The following is mostly an internal, not user-visible stuff.
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* rearrange an API to make dns_query object owned by application,
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so that it'll look like this:
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struct dns_query *q;
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q = udns_query_alloc(ctx);
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udns_query_set(q, options, domain_name, flags, ...);
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udns_query_submit(ctx, q);
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or
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udns_query_resolve(ctx, q);
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* allow NULL callbacks? Or provide separate resolver
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context list of queries which are done but wich did not
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have callback, and dns_pick() routine to retrieve results
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from this query, i.e. allow non-callback usage? The
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non-callback usage may be handy sometimes (any *good*
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example?), but it will be difficult to provide type-safe
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non-callback interface due to various RR-specific types
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in use.
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* DNS_OPT_FLAGS should be DNS_OPT_ADDFLAGS and DNS_OPT_SETFLAGS.
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Currently one can't add a single flag bit but preserve
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existing bits... at least not without retrieving all current
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flags before, which isn't that bad anyway.
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* dns_set_opts() may process flags too (such as aaonly etc)
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* a way to disable $NSCACHEIP et al processing?
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* initialize/open the context automatically, and be more
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liberal about initialization in general?
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* dns_init(do_open) - make the parameter opposite, aka
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dns_init(skip_open) ?
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* for the above. Use separate routine for initializing the context
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from system files, to not link stuff reading resolv.conf if it's
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not needed. So that automatic init will not be possible.
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* allow TCP queue?
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* detect servers which don't understand EDNS0 (returning FORMERR),
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and fall back to pre-EDNS0 for them.
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* for the above to work, we have to be able to find query object by
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only ID, not ID + qdn.
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* And oh, qID should really be random.
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* more accurate error reporting. Currently, udns always returns TEMPFAIL,
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but don't specify why it happened (ENOMEM, timeout, etc).
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* check the error value returned by recvfrom() and
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sendto() and determine which errors to ignore.
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* maybe merge dns_timeouts() and dns_ioevent(), to have
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only one entry point for everything? For traditional
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select-loop-based eventloop it may be easier, but for
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callback-driven event loops the two should be separate.
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Provide an option, or a single dns_events() entry point
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for select-loop approach, or just call dns_ioevent()
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from within dns_timeouts() (probably after renaming
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it to be dns_events()) ?
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* implement /etc/hosts lookup too, ala [c-]ares??
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* sortlist support?
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* windows port? Oh no please!.. At least, I can't do it myself
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because of the lack of platform.
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Ok ok, the Windows port is in progress. Christian Prahauser
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from cosy.sbg.ac.at is helping with that.
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