On Wed, 16 Sep 2020, Noel Duffy via fpc-pascal wrote:
I'm in need of a library to perform DNS lookups for a range of different
resource types such as MX, TXT, PTR and so on. At first I thought that netdb
would do the job, but it turns out that it only supports direct A and AAA
lookups. However, the code actually has the ability to query all resource
types, but the module's API doesn't expose this functionality. The functions
Query and BuildQuery, and the types TQueryData and TRRData are not made
available to callers.
cnetdb is similar in that it exposes just a subset of what libresolv
provides. There's no interface to things like res_nquery, for instance. While
it's theoretically possible for me to interface directly to libresolv, in
reality the API is a horrible hairball of C macros and pointers and this is
not a path I want to go down.
Is it intended that netdb will be capable of querying all resource types? It
appears that most of the work is already done, with the only major pieces
missing the parsing of the additional resource records and the exposure of
additional functions for the public API.
It was intended, but in practice I just added the records I needed.
If you feel like adding new records, I'll gladly accept patches.
Michael.
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