Put a common flags field in the query struct, rather than in some
elements of the union.

This field is for internal asr flags. The flags in "struct rrset" and
"struct ni" are different kinds of fla

Put a common flags field in the query struct, rather than in some
elements of the union.

This field is for internal asr flags. The flags in "struct rrset" and
"struct ni" are different kinds of flags.

ok eric@

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Put a common subq pointer in the query struct, rather than one in each
element of the union.

ok gilles@ millert@ krw@

Remove support for HOSTALIASES from the resolver. This "open and parse
any file indicated by an environment variable" feature inside the
resolver is incompatible with what pledge "dns" is trying to

Remove support for HOSTALIASES from the resolver. This "open and parse
any file indicated by an environment variable" feature inside the
resolver is incompatible with what pledge "dns" is trying to be. It is
a misguided "feature" added way back in history which almost noone uses,
but everyone has to assume the risk from.
ok eric florian kettenis

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remove bogus includes of err.h

Wrap <asr.h> so internal calls go direct and all the symbols are weak

Hide all unnecessary asr / resolver related API with _ prefixes.
direction & ok guenther

Skip search domains iteration if RES_DNSRCH and/or RES_DEFNAMES is unset.

prodded by Brad
ok jca@

Make queries using the search list for hostname lookups fail with
NO_DATA/EAI_NODATA when the hostname param is an empty string.
So far, they were using the entries in the search list with no
additio

Make queries using the search list for hostname lookups fail with
NO_DATA/EAI_NODATA when the hostname param is an empty string.
So far, they were using the entries in the search list with no
additional component, which is not really expected.

reported by jsing@ and a few others

ok deraadt@, "makes sense" jsing@

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Make the asr API public. Install asr.h to /usr/include.h and manpages.
Include tweaks suggested by mpi@

ok deraadt@

Cleanup and simplify the API to be exposed. Use better names for
structures, functions and defines.

discussed with and ok deraadt@ guenther@

make res_search() report NO_DATA instead of HOST_NOT_FOUND in some cases.
issue reported by matthieu@

ok matthieu@ deraadt@

Make some symbols static and prefix all visible symbols with asr_
to prevent collisions with third-party programs.

suggested by sthen@, ok theo@

Move search domain iteration code in res_search_async.c where it belongs.

Make hostaliases work for gethostbyname() and getaddrinfo() when
looking into /etc/hosts. Remove the alias check from the search
domain iteration. Instead, take a shortcut to res_query_async_ctx() i

Make hostaliases work for gethostbyname() and getaddrinfo() when
looking into /etc/hosts. Remove the alias check from the search
domain iteration. Instead, take a shortcut to res_query_async_ctx() in
res_search_async_ctx().

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Do not take external buffers for storing DNS responses in the internal
async API. That is actually useless and it makes the code more
complicated. The required buffers are always allocated when nee

Do not take external buffers for storing DNS responses in the internal
async API. That is actually useless and it makes the code more
complicated. The required buffers are always allocated when needed.

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properly check for domain name truncation at various places and fail
if that happens.

prodded by deraadt@

space cleanup; ok eric

Only use the search domains for DNS lookups, as the current resolver does.
Better not diverge too much in behavior at this point.
Typo fix and doc update while there.

knf

use proper macros for debug traces.

Import asr, an experimental async resolver implementation.
The idea is to eventually replace the existing resolver with
something better. Time to start working on it in tree.

ok deraadt@