don't connect datagram socket if RES_INSECURE1.
needed to implement IPv6 anycast UDP DNS queries as documented in
<draft-ietf-ipngwg-dns-discovery-02.txt>.
sync with kame.
the change uses extra variables which can be avoided,
it is to make the change look similar to BIND8 change.
question: timeout resolution is 1 second (time_t). should we use
timevals instead?
PR 6410 From: maximum entropy <entropy@venom.bernstein.com>
- be more backward compatible with apps that update _res.nsaddr_list[n].
- allow scoped IPv6 addresses in /etc/resolv.conf (like fe80::1%lo0).
- simplify #ifdefs.
descriptors against -1 (as appropriate).
* add actual checks which to detect stuff that would trigger_DIAGASSERT(),
and attempt to return a sane error condition.
* knf some code
* remove some `register' decls.
the first two items result in the addition of code similar to the
following in various functions:
_DIAGASSERT(path != NULL)
#ifdef _DIAGNOSTIC
if (path == NULL) {
errno = EFAULT;
return (-1);
}
#endif
non-supported AF, try the next nameserver instead of abort.
This helps situations like:
- you write IPv6 nameserver into /etc/resolv.conf and
- run non-IPv6 kernel
identifier namespace by renaming non standard functions and variables
such that they have a leading underscore. The library will use those
names internally. Weak aliases are used to provide the original names
to the API.
This is only the first part of this change. It is most of the functions
which are implemented in C for all NetBSD ports. Subsequent changes are
to add the same support to the remaining C files, to assembly files, and
to the automagically generated assembly source used for system calls.
When all of the above is done, ports with weak alias support should add
a definition for __weak_alias to <sys/cdefs.h>.
