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- - Implement a reference counter to ensure that newly entered records are not
- purged immediately (really needed?)
- - Perhaps do a two-step form of recursive query: first query those servers we
- have got cached, then (if unsuccessful) look the others up and query again.
- The impact of this optimisation may not be very big, because all sane servers
- give A records for NS records if possible.
- - Test for compatibility on other Unix-like Systems other than the BSDs and
- Linux; rewrite the functions in netdev.c and icmp.c for those OSs if
- necessary. Also try to get compatibility for other compilers than gcc.
- - Write an install rule for the Slackware start-up script.
- - Update the FAQ.
- - Implement DNSSEC support. Since version 1.2.9, pdnsd is able to cache the RR
- types necessary for DNSSEC, but the resolver is not yet security aware.
- - Implement a lookup table (hash table) for queries in progress. This would
- enable a thread that is resolving a query that is already being handled by
- another thread to wait for that other thread to finish and copy its result
- rather than independently query remote servers. It is very common for
- resolvers to resend UDP queries if they don't get a reply within a timeout
- period and if the answer is not yet cached, this will result in multiple
- threads duplicating each others work in the current implementation.
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