Kill outdated comment.

ok eric@

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

prodded by Brad
ok jca@

AI_ADDRCONFIG: skip loopback addresses, not loopback interfaces.

This is what RFC3493 suggests. Fixes AI_ADDRCONFIG on setups where
global addresses are configured only on loopback interfaces.

Dis

AI_ADDRCONFIG: skip loopback addresses, not loopback interfaces.

This is what RFC3493 suggests. Fixes AI_ADDRCONFIG on setups where
global addresses are configured only on loopback interfaces.

Discussed with and ok eric@ gilles@

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Move the AI_ADDRCONFIG setup to its own function.

Input from and ok gilles@ eric@

Limit AI_ADDRCONFIG effects to DNS queries.

This is what RFC 2553 initially described, sadly RFC 3493 stopped
limiting scope to DNS. This can result in nonsensical failures with
loopback addresses,

Limit AI_ADDRCONFIG effects to DNS queries.

This is what RFC 2553 initially described, sadly RFC 3493 stopped
limiting scope to DNS. This can result in nonsensical failures with
loopback addresses, link-local addresses, raw addresses and /etc/hosts
entries.

with and ok eric@ sperreault@

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fix a possible NULL-deref when trying to deref ifa->ifa_addr

ok eric@

change _yp_domain[] to HOST_NAME_MAX+1, and re-arrange those who include
it to get limits.h early enough

Nuke some obvious #include duplications.

ok espie@ deraadt@ millert@ tedu@

When fopen()ing internal to libc (the API doesn't support the use
of the resulting FILE *), then pass fopen() the 'e' mode letter to
mark it close-on-exec.

ok miod@

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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remove warning by adding explicit parentheses around && within ||

ok sperreault@

Implement AI_ADDRCONFIG

This is a getaddrinfo() flag that is defined thusly in RFC 3493:

If the AI_ADDRCONFIG flag is specified, IPv4 addresses shall be
returned only if an IPv4 address is co

Implement AI_ADDRCONFIG

This is a getaddrinfo() flag that is defined thusly in RFC 3493:

If the AI_ADDRCONFIG flag is specified, IPv4 addresses shall be
returned only if an IPv4 address is configured on the local system,
and IPv6 addresses shall be returned only if an IPv6 address is
configured on the local system. The loopback address is not
considered for this case as valid as a configured address.

For example, when using the DNS, a query for AAAA records should
occur only if the node has at least one IPv6 address configured
(other than IPv6 loopback) and a query for A records should occur
only if the node has at least one IPv4 address configured (other
than the IPv4 loopback).

The flag is set by default when hints is NULL.

ok Eric Faurot, Jason McIntyre

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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@

prefix structure names to avoid ambiguity and possible collisions when
the API gets public.

ok deraadt@

fix support for HOSTALIASES.

reported by tedu@
ok tedu@ deraadt@

need more #include files for resolv.h, for the non-YP case, which happens
on the install media...
ok eric

Do not restrict chars in dname during label expansion, but validate resulting
hostnames before returning them to the caller.

ok deraadt@

Better search strategy for getaddrinfo. The address family loop must
be done "inside" the search domain loop, not the other way round.

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

suggested by sthen@, ok theo@

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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copy input flags in result addrinfo structures.

Comply with rfc2553. lib/libc/net/getaddrinfo.c already has this right.
This fixes hostname resolution for OpenVPN 2.3.1.

ok eric@.

space cleanup; ok eric