From 14b93edab315672d87e6fe82aaff8e7ee7378e0b Mon Sep 17 00:00:00 2001
From: Peter Wemm <peter@FreeBSD.org>
Date: Thu, 11 Jun 1998 09:03:02 +0000
Subject: Update the resolver parts to bind-8.1.2 level.  I have not touched
 the getXXXXbyYYYY() interfaces yet.

Obtained from: diff relative to bind-8.1.2 sources
---
 lib/libc/net/res_comp.c | 748 +++---------------------------------------------
 1 file changed, 42 insertions(+), 706 deletions(-)

(limited to 'lib/libc/net/res_comp.c')

diff --git a/lib/libc/net/res_comp.c b/lib/libc/net/res_comp.c
index 8cd74696e348..de14f072c2f1 100644
--- a/lib/libc/net/res_comp.c
+++ b/lib/libc/net/res_comp.c
@@ -1,6 +1,4 @@
 /*
- * ++Copyright++ 1985, 1993
- * -
  * Copyright (c) 1985, 1993
  *    The Regents of the University of California.  All rights reserved.
  * 
@@ -31,7 +29,9 @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
- * -
+ */
+
+/*
  * Portions Copyright (c) 1993 by Digital Equipment Corporation.
  * 
  * Permission to use, copy, modify, and distribute this software for any
@@ -49,40 +49,42 @@
  * 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.
- * -
- * --Copyright--
+ */
+
+/*
+ * Portions 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.
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
 static char sccsid[] = "@(#)res_comp.c	8.1 (Berkeley) 6/4/93";
-static char orig_rcsid[] = "From: Id: res_comp.c,v 8.13 1998/04/07 04:24:06 vixie Exp $";
-static char rcsid[] = "$Id: res_comp.c,v 1.12 1997/06/27 08:22:02 peter Exp $";
+static char orig_rcsid[] = "From: Id: res_comp.c,v 8.11 1997/05/21 19:31:04 halley Exp $";
+static char rcsid[] = "$Id: res_comp.c,v 1.13 1998/05/02 13:10:56 peter Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/types.h>
 #include <sys/param.h>
 #include <netinet/in.h>
 #include <arpa/nameser.h>
-
-#include <stdio.h>
-#include <resolv.h>
 #include <ctype.h>
-#include <errno.h>
-
-#include <unistd.h>
+#include <resolv.h>
+#include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 
-static int	ns_name_ntop __P((const u_char *, char *, size_t));
-static int	ns_name_pton __P((const char *, u_char *, size_t));
-static int	ns_name_unpack __P((const u_char *, const u_char *,
-				    const u_char *, u_char *, size_t));
-static int	ns_name_pack __P((const u_char *, u_char *, int,
-				  const u_char **, const u_char **));
-static int	ns_name_uncompress __P((const u_char *, const u_char *,
-					const u_char *, char *, size_t));
-static int	ns_name_compress __P((const char *, u_char *, size_t,
-				      const u_char **, const u_char **));
-static int	ns_name_skip __P((const u_char **, const u_char *));
+#define BIND_4_COMPAT
 
 /*
  * Expand compressed domain name 'comp_dn' to full domain name.
@@ -120,7 +122,7 @@ dn_comp(const char *src, u_char *dst, int dstsiz,
  * Skip over a compressed domain name. Return the size or -1.
  */
 int
-__dn_skipname(const u_char *ptr, const u_char *eom) {
+dn_skipname(const u_char *ptr, const u_char *eom) {
 	const u_char *saveptr = ptr;
 
 	if (ns_name_skip(&ptr, eom) == -1)
@@ -161,7 +163,7 @@ res_hnok(dn)
 		int nch = *dn++;
 
 		if (periodchar(ch)) {
-			NULL;
+			(void)NULL;
 		} else if (periodchar(pch)) {
 			if (!borderchar(ch))
 				return (0);
@@ -206,7 +208,7 @@ res_mailok(dn)
 
 	/* "." is a valid missing representation */
 	if (*dn == '\0')
-		return(1);
+		return (1);
 
 	/* otherwise <label>.<hostname> */
 	while ((ch = *dn++) != '\0') {
@@ -221,7 +223,7 @@ res_mailok(dn)
 	}
 	if (periodchar(ch))
 		return (res_hnok(dn));
-	return(0);
+	return (0);
 }
 
 /*
@@ -240,683 +242,17 @@ res_dnok(dn)
 	return (1);
 }
 
+#ifdef BIND_4_COMPAT
 /*
- * Routines to insert/extract short/long's.
- */
-
-u_int16_t
-_getshort(msgp)
-	register const u_char *msgp;
-{
-	register u_int16_t u;
-
-	GETSHORT(u, msgp);
-	return (u);
-}
-
-u_int32_t
-_getlong(msgp)
-	register const u_char *msgp;
-{
-	register u_int32_t u;
-
-	GETLONG(u, msgp);
-	return (u);
-}
-
-void
-#if defined(__STDC__) || defined(__cplusplus)
-__putshort(register u_int16_t s, register u_char *msgp)	/* must match proto */
-#else
-__putshort(s, msgp)
-	register u_int16_t s;
-	register u_char *msgp;
-#endif
-{
-	PUTSHORT(s, msgp);
-}
-
-void
-__putlong(l, msgp)
-	register u_int32_t l;
-	register u_char *msgp;
-{
-	PUTLONG(l, msgp);
-}
-
-/* ++ From BIND 8.1.1. ++ */
-/*
- * 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.
- */
-
-/*"Id: ns_name.c,v 1.1 1997/12/13 02:41:13 vixie Exp vixie"*/
-
-/*#include "port_before.h"*/
-
-/*#include <sys/types.h>*/
-
-/*#include <netinet/in.h>*/
-/*#include <arpa/nameser.h>*/
-
-/*#include <errno.h>*/
-/*#include <resolv.h>*/
-/*#include <string.h>*/
-
-/*#include "port_after.h"*/
-
-#define NS_CMPRSFLGS	0xc0	/* Flag bits indicating name compression. */
-#define NS_MAXCDNAME	255	/* maximum compressed domain name */
-
-/* Data. */
-
-static char		digits[] = "0123456789";
-
-/* Forward. */
-
-static int		special(int);
-static int		printable(int);
-static int		dn_find(const u_char *, const u_char *,
-				const u_char * const *,
-				const u_char * const *);
-
-/* Public. */
-
-/*
- * ns_name_ntop(src, dst, dstsiz)
- *	Convert an encoded domain name to printable ascii as per RFC1035.
- * return:
- *	Number of bytes written to buffer, or -1 (with errno set)
- * notes:
- *	The root is returned as "."
- *	All other domains are returned in non absolute form
- */
-static int
-ns_name_ntop(src, dst, dstsiz)
-	const u_char *src;
-	char *dst;
-	size_t dstsiz;
-{
-	const u_char *cp;
-	char *dn, *eom;
-	u_char c;
-	u_int n;
-
-	cp = src;
-	dn = dst;
-	eom = dst + dstsiz;
-
-	while ((n = *cp++) != 0) {
-		if ((n & NS_CMPRSFLGS) != 0) {
-			/* Some kind of compression pointer. */
-			errno = EMSGSIZE;
-			return (-1);
-		}
-		if (dn != dst) {
-			if (dn >= eom) {
-				errno = EMSGSIZE;
-				return (-1);
-			}
-			*dn++ = '.';
-		}
-		if (dn + n >= eom) {
-			errno = EMSGSIZE;
-			return (-1);
-		}
-		for ((void)NULL; n > 0; n--) {
-			c = *cp++;
-			if (special(c)) {
-				if (dn + 1 >= eom) {
-					errno = EMSGSIZE;
-					return (-1);
-				}
-				*dn++ = '\\';
-				*dn++ = (char)c;
-			} else if (!printable(c)) {
-				if (dn + 3 >= eom) {
-					errno = EMSGSIZE;
-					return (-1);
-				}
-				*dn++ = '\\';
-				*dn++ = digits[c / 100];
-				*dn++ = digits[(c % 100) / 10];
-				*dn++ = digits[c % 10];
-			} else {
-				if (dn >= eom) {
-					errno = EMSGSIZE;
-					return (-1);
-				}
-				*dn++ = (char)c;
-			}
-		}
-	}
-	if (dn == dst) {
-		if (dn >= eom) {
-			errno = EMSGSIZE;
-			return (-1);
-		}
-		*dn++ = '.';
-	}
-	if (dn >= eom) {
-		errno = EMSGSIZE;
-		return (-1);
-	}
-	*dn++ = '\0';
-	return (dn - dst);
-}
-
-/*
- * ns_name_pton(src, dst, dstsiz)
- *	Convert a ascii string into an encoded domain name as per RFC1035.
- * return:
- *	-1 if it fails
- *	1 if string was fully qualified
- *	0 is string was not fully qualified
- * notes:
- *	Enforces label and domain length limits.
- */
-
-static int
-ns_name_pton(src, dst, dstsiz)
-	const char *src;
-	u_char *dst;
-	size_t dstsiz;
-{
-	u_char *label, *bp, *eom;
-	int c, n, escaped;
-	char *cp;
-
-	escaped = 0;
-	bp = dst;
-	eom = dst + dstsiz;
-	label = bp++;
-
-	while ((c = *src++) != 0) {
-		if (escaped) {
-			if ((cp = strchr(digits, c)) != NULL) {
-				n = (cp - digits) * 100;
-				if ((c = *src++) == 0 ||
-				    (cp = strchr(digits, c)) == NULL) {
-					errno = EMSGSIZE;
-					return (-1);
-				}
-				n += (cp - digits) * 10;
-				if ((c = *src++) == 0 ||
-				    (cp = strchr(digits, c)) == NULL) {
-					errno = EMSGSIZE;
-					return (-1);
-				}
-				n += (cp - digits);
-				if (n > 255) {
-					errno = EMSGSIZE;
-					return (-1);
-				}
-				c = n;
-			}
-			escaped = 0;
-		} else if (c == '\\') {
-			escaped = 1;
-			continue;
-		} else if (c == '.') {
-			c = (bp - label - 1);
-			if ((c & NS_CMPRSFLGS) != 0) {	/* Label too big. */
-				errno = EMSGSIZE;
-				return (-1);
-			}
-			if (label >= eom) {
-				errno = EMSGSIZE;
-				return (-1);
-			}
-			*label = c;
-			/* Fully qualified ? */
-			if (*src == '\0') {
-				if (c != 0) {
-					if (bp >= eom) {
-						errno = EMSGSIZE;
-						return (-1);
-					}
-					*bp++ = '\0';
-				}
-				if ((bp - dst) > MAXCDNAME) {
-					errno = EMSGSIZE;
-					return (-1);
-				}
-				return (1);
-			}
-			if (c == 0) {
-				errno = EMSGSIZE;
-				return (-1);
-			}
-			label = bp++;
-			continue;
-		}
-		if (bp >= eom) {
-			errno = EMSGSIZE;
-			return (-1);
-		}
-		*bp++ = (u_char)c;
-	}
-	c = (bp - label - 1);
-	if ((c & NS_CMPRSFLGS) != 0) {		/* Label too big. */
-		errno = EMSGSIZE;
-		return (-1);
-	}
-	if (label >= eom) {
-		errno = EMSGSIZE;
-		return (-1);
-	}
-	*label = c;
-	if (c != 0) {
-		if (bp >= eom) {
-			errno = EMSGSIZE;
-			return (-1);
-		}
-		*bp++ = 0;
-	}
-	if ((bp - dst) > MAXCDNAME) {	/* src too big */
-		errno = EMSGSIZE;
-		return (-1);
-	}
-	return (0);
-}
-
-/*
- * ns_name_unpack(msg, eom, src, dst, dstsiz)
- *	Unpack a domain name from a message, source may be compressed.
- * return:
- *	-1 if it fails, or consumed octets if it succeeds.
- */
-static int
-ns_name_unpack(msg, eom, src, dst, dstsiz)
-	const u_char *msg;
-	const u_char *eom;
-	const u_char *src;
-	u_char *dst;
-	size_t dstsiz;
-{
-	const u_char *srcp, *dstlim;
-	u_char *dstp;
-	int n, c, len, checked;
-
-	len = -1;
-	checked = 0;
-	dstp = dst;
-	srcp = src;
-	dstlim = dst + dstsiz;
-	if (srcp < msg || srcp >= eom) {
-		errno = EMSGSIZE;
-		return (-1);
-	}
-	/* Fetch next label in domain name. */
-	while ((n = *srcp++) != 0) {
-		/* Check for indirection. */
-		switch (n & NS_CMPRSFLGS) {
-		case 0:
-			/* Limit checks. */
-			if (dstp + n + 1 >= dstlim || srcp + n >= eom) {
-				errno = EMSGSIZE;
-				return (-1);
-			}
-			checked += n + 1;
-			*dstp++ = n;
-			memcpy(dstp, srcp, n);
-			dstp += n;
-			srcp += n;
-			break;
-
-		case NS_CMPRSFLGS:
-			if (srcp >= eom) {
-				errno = EMSGSIZE;
-				return (-1);
-			}
-			if (len < 0)
-				len = srcp - src + 1;
-			srcp = msg + (((n & 0x3f) << 8) | (*srcp & 0xff));
-			if (srcp < msg || srcp >= eom) {  /* Out of range. */
-				errno = EMSGSIZE;
-				return (-1);
-			}
-			checked += 2;
-			/*
-			 * Check for loops in the compressed name;
-			 * if we've looked at the whole message,
-			 * there must be a loop.
-			 */
-			if (checked >= eom - msg) {
-				errno = EMSGSIZE;
-				return (-1);
-			}
-			break;
-
-		default:
-			errno = EMSGSIZE;
-			return (-1);			/* flag error */
-		}
-	}
-	*dstp = '\0';
-	if (len < 0)
-		len = srcp - src;
-	return (len);
-}
-
-/*
- * ns_name_pack(src, dst, dstsiz, dnptrs, lastdnptr)
- *	Pack domain name 'domain' into 'comp_dn'.
- * return:
- *	Size of the compressed name, or -1.
- * notes:
- *	'dnptrs' is an array of pointers to previous compressed names.
- *	dnptrs[0] is a pointer to the beginning of the message. The array
- *	ends with NULL.
- *	'lastdnptr' is a pointer to the end of the array pointed to
- *	by 'dnptrs'.
- * Side effects:
- *	The list of pointers in dnptrs is updated for labels inserted into
- *	the message as we compress the name.  If 'dnptr' is NULL, we don't
- *	try to compress names. If 'lastdnptr' is NULL, we don't update the
- *	list.
+ * This module must export the following externally-visible symbols:
+ *    ___putlong
+ *    ___putshort
+ *    __getlong
+ *    __getshort
+ * Note that one _ comes from C and the others come from us.
  */
-static int
-ns_name_pack(src, dst, dstsiz, dnptrs, lastdnptr)
-	const u_char *src;
-	u_char *dst;
-	int dstsiz;
-	const u_char **dnptrs;
-	const u_char **lastdnptr;
-{
-	u_char *dstp;
-	const u_char **cpp, **lpp, *eob, *msg;
-	const u_char *srcp;
-	int n, l;
-
-	srcp = src;
-	dstp = dst;
-	eob = dstp + dstsiz;
-	lpp = cpp = NULL;
-	if (dnptrs != NULL) {
-		if ((msg = *dnptrs++) != NULL) {
-			for (cpp = dnptrs; *cpp != NULL; cpp++)
-				(void)NULL;
-			lpp = cpp;	/* end of list to search */
-		}
-	} else
-		msg = NULL;
-
-	/* make sure the domain we are about to add is legal */
-	l = 0;
-	do {
-		n = *srcp;
-		if ((n & NS_CMPRSFLGS) != 0) {
-			errno = EMSGSIZE;
-			return (-1);
-		}
-		l += n + 1;
-		if (l > MAXCDNAME) {
-			errno = EMSGSIZE;
-			return (-1);
-		}
-		srcp += n + 1;
-	} while (n != 0);
-
-	srcp = src;
-	do {
-		/* Look to see if we can use pointers. */
-		n = *srcp;
-		if (n != 0 && msg != NULL) {
-			l = dn_find(srcp, msg, (const u_char * const *)dnptrs,
-				    (const u_char * const *)lpp);
-			if (l >= 0) {
-				if (dstp + 1 >= eob) {
-					errno = EMSGSIZE;
-					return (-1);
-				}
-				*dstp++ = (l >> 8) | NS_CMPRSFLGS;
-				*dstp++ = l % 256;
-				return (dstp - dst);
-			}
-			/* Not found, save it. */
-			if (lastdnptr != NULL && cpp < lastdnptr - 1 &&
-			    (dstp - msg) < 0x4000) {
-				*cpp++ = dstp;
-				*cpp = NULL;
-			}
-		}
-		/* copy label to buffer */
-		if (n & NS_CMPRSFLGS) {		/* Should not happen. */
-			errno = EMSGSIZE;
-			return (-1);
-		}
-		if (dstp + 1 + n >= eob) {
-			errno = EMSGSIZE;
-			return (-1);
-		}
-		memcpy(dstp, srcp, n + 1);
-		srcp += n + 1;
-		dstp += n + 1;
-	} while (n != 0);
-
-	if (dstp > eob) {
-		if (msg != NULL)
-			*lpp = NULL;
-		errno = EMSGSIZE;
-		return (-1);
-	} 
-	return (dstp - dst);
-}
-
-/*
- * ns_name_uncompress(msg, eom, src, dst, dstsiz)
- *	Expand compressed domain name to presentation format.
- * return:
- *	Number of bytes read out of `src', or -1 (with errno set).
- * note:
- *	Root domain returns as "." not "".
- */
-static int
-ns_name_uncompress(msg, eom, src, dst, dstsiz)
-	const u_char *msg;
-	const u_char *eom;
-	const u_char *src;
-	char *dst;
-	size_t dstsiz;
-{
-	u_char tmp[NS_MAXCDNAME];
-	int n;
-	
-	if ((n = ns_name_unpack(msg, eom, src, tmp, sizeof tmp)) == -1)
-		return (-1);
-	if (ns_name_ntop(tmp, dst, dstsiz) == -1)
-		return (-1);
-	return (n);
-}
-
-/*
- * ns_name_compress(src, dst, dstsiz, dnptrs, lastdnptr)
- *	Compress a domain name into wire format, using compression pointers.
- * return:
- *	Number of bytes consumed in `dst' or -1 (with errno set).
- * notes:
- *	'dnptrs' is an array of pointers to previous compressed names.
- *	dnptrs[0] is a pointer to the beginning of the message.
- *	The list ends with NULL.  'lastdnptr' is a pointer to the end of the
- *	array pointed to by 'dnptrs'. Side effect is to update the list of
- *	pointers for labels inserted into the message as we compress the name.
- *	If 'dnptr' is NULL, we don't try to compress names. If 'lastdnptr'
- *	is NULL, we don't update the list.
- */
-static int
-ns_name_compress(src, dst, dstsiz, dnptrs, lastdnptr)
-	const char *src;
-	u_char *dst;
-	size_t dstsiz;
-	const u_char **dnptrs;
-	const u_char **lastdnptr;
-{
-	u_char tmp[NS_MAXCDNAME];
-
-	if (ns_name_pton(src, tmp, sizeof tmp) == -1)
-		return (-1);
-	return (ns_name_pack(tmp, dst, dstsiz, dnptrs, lastdnptr));
-}
-
-/*
- * ns_name_skip(ptrptr, eom)
- *	Advance *ptrptr to skip over the compressed name it points at.
- * return:
- *	0 on success, -1 (with errno set) on failure.
- */
-static int
-ns_name_skip(ptrptr, eom)
-	const u_char **ptrptr;
-	const u_char *eom;
-{
-	const u_char *cp;
-	u_int n;
-
-	cp = *ptrptr;
-	while (cp < eom && (n = *cp++) != 0) {
-		/* Check for indirection. */
-		switch (n & NS_CMPRSFLGS) {
-		case 0:			/* normal case, n == len */
-			cp += n;
-			continue;
-		case NS_CMPRSFLGS:	/* indirection */
-			cp++;
-			break;
-		default:		/* illegal type */
-			errno = EMSGSIZE;
-			return (-1);
-		}
-		break;
-	}
-	if (cp > eom) {
-		errno = EMSGSIZE;
-		return (-1);
-	}
-	*ptrptr = cp;
-	return (0);
-}
-
-/* Private. */
-
-/*
- * special(ch)
- *	Thinking in noninternationalized USASCII (per the DNS spec),
- *	is this characted special ("in need of quoting") ?
- * return:
- *	boolean.
- */
-static int
-special(ch)
-	int ch;
-{
-	switch (ch) {
-	case 0x22: /* '"' */
-	case 0x2E: /* '.' */
-	case 0x3B: /* ';' */
-	case 0x5C: /* '\\' */
-	/* Special modifiers in zone files. */
-	case 0x40: /* '@' */
-	case 0x24: /* '$' */
-		return (1);
-	default:
-		return (0);
-	}
-}
-
-/*
- * printable(ch)
- *	Thinking in noninternationalized USASCII (per the DNS spec),
- *	is this character visible and not a space when printed ?
- * return:
- *	boolean.
- */
-static int
-printable(ch)
-	int ch;
-{
-	return (ch > 0x20 && ch < 0x7f);
-}
-
-/*
- *	Thinking in noninternationalized USASCII (per the DNS spec),
- *	convert this character to lower case if it's upper case.
- */
-static int
-mklower(ch)
-	int ch;
-{
-	if (ch >= 0x41 && ch <= 0x5A)
-		return (ch + 0x20);
-	return (ch);
-}
-
-/*
- * dn_find(domain, msg, dnptrs, lastdnptr)
- *	Search for the counted-label name in an array of compressed names.
- * return:
- *	offset from msg if found, or -1.
- * notes:
- *	dnptrs is the pointer to the first name on the list,
- *	not the pointer to the start of the message.
- */
-static int
-dn_find(domain, msg, dnptrs, lastdnptr)
-	const u_char *domain;
-	const u_char *msg;
-	const u_char * const *dnptrs;
-	const u_char * const *lastdnptr;
-{
-	const u_char *dn, *cp, *sp;
-	const u_char * const *cpp;
-	u_int n;
-
-	for (cpp = dnptrs; cpp < lastdnptr; cpp++) {
-		dn = domain;
-		sp = cp = *cpp;
-		while ((n = *cp++) != 0) {
-			/*
-			 * check for indirection
-			 */
-			switch (n & NS_CMPRSFLGS) {
-			case 0:			/* normal case, n == len */
-				if (n != *dn++)
-					goto next;
-				for ((void)NULL; n > 0; n--)
-					if (mklower(*dn++) != mklower(*cp++))
-						goto next;
-				/* Is next root for both ? */
-				if (*dn == '\0' && *cp == '\0')
-					return (sp - msg);
-				if (*dn)
-					continue;
-				goto next;
-
-			case NS_CMPRSFLGS:	/* indirection */
-				cp = msg + (((n & 0x3f) << 8) | *cp);
-				break;
-
-			default:	/* illegal type */
-				errno = EMSGSIZE;
-				return (-1);
-			}
-		}
- next: ;
-	}
-	errno = ENOENT;
-	return (-1);
-}
-
-/* -- From BIND 8.1.1. -- */
+void __putlong(u_int32_t src, u_char *dst) { ns_put32(src, dst); }
+void __putshort(u_int16_t src, u_char *dst) { ns_put16(src, dst); }
+u_int32_t _getlong(const u_char *src) { return (ns_get32(src)); }
+u_int16_t _getshort(const u_char *src) { return (ns_get16(src)); }
+#endif /*BIND_4_COMPAT*/
-- 
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