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.
IPv6 transport-ready resolvers/DNS servers. need careful configuration
when enable it. (default config is not affected).
see manpage for details.
XXX visible symbol __res_opt() is added, however, it is not supposed to be
called from outside, libc minor is not bumped.
If an argument of a ctype function is outside "unsigned char"
and if it is not EOF, the behavior is undefined.
The isascii(3) is the sole exception of above and it was used to
be used to check a value was valid for other ctype functions in
ancient systems. On modern systems, the ctype functions take
all values of "unsigned char", and this check is obsolete and
even wrong for non-ASCII systems. However, we leave the isascii()
untouched for now, so as not to change the current behavior.
XXX 4.9.5 -> 4.9.7 moves _res from data to bss. the bss version of the code
is committed, but is wrapped with #ifdef __RES_IN_BSS and is disabled
(_res is still in data segment).
- 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
- ensure hostname from gethostname() is nul-terminated in all cases
- minor KNF
- use MAXHOSTNAMELEN over various other values/defines
- be safe will buffers that hold hostnames
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>.
itojun