Update the resolver in libc to BIND9's one.

Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc.  So,
res_sendsigned(3) is not merged into libc.

Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver.  They are not defined in resolv.h but defined in
res_update.h separately in BIND9.  Further, they are not called from
our tree.  So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).

Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h.  And, global variable _res_ext is removed.  It
breaks binary backward compatibility.  But, since it is not used from
outside of our libc, I think it is safe.

Reviewed by:	arch@ (no objection)

1 files changed, 0 insertions, 150 deletions

diff --git a/lib/libc/net/ns_ttl.c b/lib/libc/net/ns_ttl.c
deleted file mode 100644
index 79083b2..0000000
--- a/lib/libc/net/ns_ttl.c
+++ /dev/null
@@ -1,150 +0,0 @@
-/*
- * Copyright (c) 1996 by Internet Software Consortium.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
- * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
- * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
- * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-/* Import. */
-
-#include <arpa/nameser.h>
-
-#include <ctype.h>
-#include <errno.h>
-#include <stdio.h>
-#include <string.h>
-
-#define SPRINTF(x) ((size_t)sprintf x)
-
-/* Forward. */
-
-static int	fmt1(int t, char s, char **buf, size_t *buflen);
-
-/* Macros. */
-
-#define T(x) if ((x) < 0) return (-1); else (void)NULL
-
-/* Public. */
-
-int
-ns_format_ttl(u_long src, char *dst, size_t dstlen) {
-	char *odst = dst;
-	int secs, mins, hours, days, weeks, x;
-	char *p;
-
-	secs = src % 60;   src /= 60;
-	mins = src % 60;   src /= 60;
-	hours = src % 24;  src /= 24;
-	days = src % 7;    src /= 7;
-	weeks = src;       src = 0;
-
-	x = 0;
-	if (weeks) {
-		T(fmt1(weeks, 'W', &dst, &dstlen));
-		x++;
-	}
-	if (days) {
-		T(fmt1(days, 'D', &dst, &dstlen));
-		x++;
-	}
-	if (hours) {
-		T(fmt1(hours, 'H', &dst, &dstlen));
-		x++;
-	}
-	if (mins) {
-		T(fmt1(mins, 'M', &dst, &dstlen));
-		x++;
-	}
-	if (secs || !(weeks || days || hours || mins)) {
-		T(fmt1(secs, 'S', &dst, &dstlen));
-		x++;
-	}
-
-	if (x > 1) {
-		int ch;
-
-		for (p = odst; (ch = *p) != '\0'; p++)
-			if (isascii(ch) && isupper(ch))
-				*p = tolower(ch);
-	}
-
-	return (dst - odst);
-}
-
-int
-ns_parse_ttl(const char *src, u_long *dst) {
-	u_long ttl, tmp;
-	int ch, digits, dirty;
-
-	ttl = 0;
-	tmp = 0;
-	digits = 0;
-	dirty = 0;
-	while ((ch = *src++) != '\0') {
-		if (!isascii(ch) || !isprint(ch))
-			goto einval;
-		if (isdigit(ch)) {
-			tmp *= 10;
-			tmp += (ch - '0');
-			digits++;
-			continue;
-		}
-		if (digits == 0)
-			goto einval;
-		if (islower(ch))
-			ch = toupper(ch);
-		switch (ch) {
-		case 'W':  tmp *= 7;
-		case 'D':  tmp *= 24;
-		case 'H':  tmp *= 60;
-		case 'M':  tmp *= 60;
-		case 'S':  break;
-		default:   goto einval;
-		}
-		ttl += tmp;
-		tmp = 0;
-		digits = 0;
-		dirty = 1;
-	}
-	if (digits > 0) {
-		if (dirty)
-			goto einval;
-		else
-			ttl += tmp;
-	}
-	*dst = ttl;
-	return (0);
-
- einval:
-	errno = EINVAL;
-	return (-1);
-}
-
-/* Private. */
-
-static int
-fmt1(int t, char s, char **buf, size_t *buflen) {
-	char tmp[50];
-	size_t len;
-
-	len = SPRINTF((tmp, "%d%c", t, s));
-	if (len + 1 > *buflen)
-		return (-1);
-	strcpy(*buf, tmp);
-	*buf += len;
-	*buflen -= len;
-	return (0);
-}