BIND 4.9.5-P1.

libresolv and include are required until the new resolver gets integrated
into libc.

1 files changed, 512 insertions, 0 deletions

diff --git a/usr.sbin/named/libresolv/res_comp.c b/usr.sbin/named/libresolv/res_comp.c
new file mode 100644
index 00000000000..a40c00763da
--- /dev/null
+++ b/usr.sbin/named/libresolv/res_comp.c
@@ -0,0 +1,512 @@
+/*	$OpenBSD: res_comp.c,v 1.1 1997/03/12 10:42:08 downsj Exp $	*/
+
+/*
+ * ++Copyright++ 1985, 1993
+ * -
+ * Copyright (c) 1985, 1993
+ *    The Regents of the University of California.  All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ * 	This product includes software developed by the University of
+ * 	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * 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
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION 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.
+ * -
+ * --Copyright--
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)res_comp.c	8.1 (Berkeley) 6/4/93";
+static char rcsid[] = "$From: res_comp.c,v 8.11 1996/12/02 09:17:22 vixie Exp $";
+#else
+static char rcsid[] = "$OpenBSD: res_comp.c,v 1.1 1997/03/12 10:42:08 downsj Exp $";
+#endif
+#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>
+
+#if defined(BSD) && (BSD >= 199103)
+# include <unistd.h>
+# include <string.h>
+#else
+# include "../conf/portability.h"
+#endif
+
+static int	dn_find __P((u_char *exp_dn, u_char *msg,
+			     u_char **dnptrs, u_char **lastdnptr));
+
+/*
+ * Expand compressed domain name 'comp_dn' to full domain name.
+ * 'msg' is a pointer to the begining of the message,
+ * 'eomorig' points to the first location after the message,
+ * 'exp_dn' is a pointer to a buffer of size 'length' for the result.
+ * Return size of compressed name or -1 if there was an error.
+ */
+int
+dn_expand(msg, eomorig, comp_dn, exp_dn, length)
+	const u_char *msg, *eomorig, *comp_dn;
+	char *exp_dn;
+	int length;
+{
+	register const u_char *cp;
+	register char *dn;
+	register int n, c;
+	char *eom;
+	int len = -1, checked = 0;
+
+	dn = exp_dn;
+	cp = comp_dn;
+	eom = exp_dn + length;
+	/*
+	 * fetch next label in domain name
+	 */
+	while (n = *cp++) {
+		/*
+		 * Check for indirection
+		 */
+		switch (n & INDIR_MASK) {
+		case 0:
+			if (dn != exp_dn) {
+				if (dn >= eom)
+					return (-1);
+				*dn++ = '.';
+			}
+			if (dn+n >= eom)
+				return (-1);
+			checked += n + 1;
+			while (--n >= 0) {
+				if (((c = *cp++) == '.') || (c == '\\')) {
+					if (dn + n + 2 >= eom)
+						return (-1);
+					*dn++ = '\\';
+				}
+				*dn++ = c;
+				if (cp >= eomorig)	/* out of range */
+					return (-1);
+			}
+			break;
+
+		case INDIR_MASK:
+			if (len < 0)
+				len = cp - comp_dn + 1;
+			cp = msg + (((n & 0x3f) << 8) | (*cp & 0xff));
+			if (cp < msg || cp >= eomorig)	/* out of range */
+				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 >= eomorig - msg)
+				return (-1);
+			break;
+
+		default:
+			return (-1);			/* flag error */
+		}
+	}
+	*dn = '\0';
+	if (len < 0)
+		len = cp - comp_dn;
+	return (len);
+}
+
+/*
+ * Compress domain name 'exp_dn' into 'comp_dn'.
+ * Return the size of the compressed name or -1.
+ * 'length' is the size of the array pointed to by 'comp_dn'.
+ * 'dnptrs' is a list 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 arrary 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.
+ */
+int
+dn_comp(exp_dn, comp_dn, length, dnptrs, lastdnptr)
+	const char *exp_dn;
+	u_char *comp_dn, **dnptrs, **lastdnptr;
+	int length;
+{
+	register u_char *cp, *dn;
+	register int c, l;
+	u_char **cpp, **lpp, *sp, *eob;
+	u_char *msg;
+
+	dn = (u_char *)exp_dn;
+	cp = comp_dn;
+	eob = cp + length;
+	lpp = cpp = NULL;
+	if (dnptrs != NULL) {
+		if ((msg = *dnptrs++) != NULL) {
+			for (cpp = dnptrs; *cpp != NULL; cpp++)
+				;
+			lpp = cpp;	/* end of list to search */
+		}
+	} else
+		msg = NULL;
+	for (c = *dn++; c != '\0'; ) {
+		/* look to see if we can use pointers */
+		if (msg != NULL) {
+			if ((l = dn_find(dn-1, msg, dnptrs, lpp)) >= 0) {
+				if (cp+1 >= eob)
+					return (-1);
+				*cp++ = (l >> 8) | INDIR_MASK;
+				*cp++ = l % 256;
+				return (cp - comp_dn);
+			}
+			/* not found, save it */
+			if (lastdnptr != NULL && cpp < lastdnptr-1) {
+				*cpp++ = cp;
+				*cpp = NULL;
+			}
+		}
+		sp = cp++;	/* save ptr to length byte */
+		do {
+			if (c == '.') {
+				c = *dn++;
+				break;
+			}
+			if (c == '\\') {
+				if ((c = *dn++) == '\0')
+					break;
+			}
+			if (cp >= eob) {
+				if (msg != NULL)
+					*lpp = NULL;
+				return (-1);
+			}
+			*cp++ = c;
+		} while ((c = *dn++) != '\0');
+		/* catch trailing '.'s but not '..' */
+		if ((l = cp - sp - 1) == 0 && c == '\0') {
+			cp--;
+			break;
+		}
+		if (l <= 0 || l > MAXLABEL) {
+			if (msg != NULL)
+				*lpp = NULL;
+			return (-1);
+		}
+		*sp = l;
+	}
+	if (cp >= eob) {
+		if (msg != NULL)
+			*lpp = NULL;
+		return (-1);
+	}
+	*cp++ = '\0';
+	return (cp - comp_dn);
+}
+
+/*
+ * Skip over a compressed domain name. Return the size or -1.
+ */
+int
+__dn_skipname(comp_dn, eom)
+	const u_char *comp_dn, *eom;
+{
+	register const u_char *cp;
+	register int n;
+
+	cp = comp_dn;
+	while (cp < eom && (n = *cp++)) {
+		/*
+		 * check for indirection
+		 */
+		switch (n & INDIR_MASK) {
+		case 0:			/* normal case, n == len */
+			cp += n;
+			continue;
+		case INDIR_MASK:	/* indirection */
+			cp++;
+			break;
+		default:		/* illegal type */
+			return (-1);
+		}
+		break;
+	}
+	if (cp > eom)
+		return (-1);
+	return (cp - comp_dn);
+}
+
+static int
+mklower(ch)
+	register int ch;
+{
+	if (isascii(ch) && isupper(ch))
+		return (tolower(ch));
+	return (ch);
+}
+
+/*
+ * Search for expanded name from a list of previously compressed names.
+ * Return the offset from msg if found or -1.
+ * dnptrs is the pointer to the first name on the list,
+ * not the pointer to the start of the message.
+ */
+static int
+dn_find(exp_dn, msg, dnptrs, lastdnptr)
+	u_char *exp_dn, *msg;
+	u_char **dnptrs, **lastdnptr;
+{
+	register u_char *dn, *cp, **cpp;
+	register int n;
+	u_char *sp;
+
+	for (cpp = dnptrs; cpp < lastdnptr; cpp++) {
+		dn = exp_dn;
+		sp = cp = *cpp;
+		while (n = *cp++) {
+			/*
+			 * check for indirection
+			 */
+			switch (n & INDIR_MASK) {
+			case 0:		/* normal case, n == len */
+				while (--n >= 0) {
+					if (*dn == '.')
+						goto next;
+					if (*dn == '\\')
+						dn++;
+					if (mklower(*dn++) != mklower(*cp++))
+						goto next;
+				}
+				if ((n = *dn++) == '\0' && *cp == '\0')
+					return (sp - msg);
+				if (n == '.')
+					continue;
+				goto next;
+
+			case INDIR_MASK:	/* indirection */
+				cp = msg + (((n & 0x3f) << 8) | *cp);
+				break;
+
+			default:	/* illegal type */
+				return (-1);
+			}
+		}
+		if (*dn == '\0')
+			return (sp - msg);
+	next:	;
+	}
+	return (-1);
+}
+
+/*
+ * Verify that a domain name uses an acceptable character set.
+ */
+
+/*
+ * Note the conspicuous absence of ctype macros in these definitions.  On
+ * non-ASCII hosts, we can't depend on string literals or ctype macros to
+ * tell us anything about network-format data.  The rest of the BIND system
+ * is not careful about this, but for some reason, we're doing it right here.
+ */
+#define PERIOD 0x2e
+#define	hyphenchar(c) ((c) == 0x2d)
+#define bslashchar(c) ((c) == 0x5c)
+#define periodchar(c) ((c) == PERIOD)
+#define asterchar(c) ((c) == 0x2a)
+#define alphachar(c) (((c) >= 0x41 && (c) <= 0x5a) \
+		   || ((c) >= 0x61 && (c) <= 0x7a))
+#define digitchar(c) ((c) >= 0x30 && (c) <= 0x39)
+
+#define borderchar(c) (alphachar(c) || digitchar(c))
+#define middlechar(c) (borderchar(c) || hyphenchar(c))
+#define	domainchar(c) ((c) > 0x20 && (c) < 0x7f)
+
+int
+res_hnok(dn)
+	const char *dn;
+{
+	int ppch = '\0', pch = PERIOD, ch = *dn++;
+
+	while (ch != '\0') {
+		int nch = *dn++;
+
+		if (periodchar(ch)) {
+			NULL;
+		} else if (periodchar(pch)) {
+			if (!borderchar(ch))
+				return (0);
+		} else if (periodchar(nch) || nch == '\0') {
+			if (!borderchar(ch))
+				return (0);
+		} else {
+			if (!middlechar(ch))
+				return (0);
+		}
+		ppch = pch, pch = ch, ch = nch;
+	}
+	return (1);
+}
+
+/*
+ * hostname-like (A, MX, WKS) owners can have "*" as their first label
+ * but must otherwise be as a host name.
+ */
+int
+res_ownok(dn)
+	const char *dn;
+{
+	if (asterchar(dn[0])) {
+		if (periodchar(dn[1]))
+			return (res_hnok(dn+2));
+		if (dn[1] == '\0')
+			return (1);
+	}
+	return (res_hnok(dn));
+}
+
+/*
+ * SOA RNAMEs and RP RNAMEs can have any printable character in their first
+ * label, but the rest of the name has to look like a host name.
+ */
+int
+res_mailok(dn)
+	const char *dn;
+{
+	int ch, escaped = 0;
+
+	/* "." is a valid missing representation */
+	if (*dn == '\0')
+		return(1);
+
+	/* otherwise <label>.<hostname> */
+	while ((ch = *dn++) != '\0') {
+		if (!domainchar(ch))
+			return (0);
+		if (!escaped && periodchar(ch))
+			break;
+		if (escaped)
+			escaped = 0;
+		else if (bslashchar(ch))
+			escaped = 1;
+	}
+	if (periodchar(ch))
+		return (res_hnok(dn));
+	return(0);
+}
+
+/*
+ * This function is quite liberal, since RFC 1034's character sets are only
+ * recommendations.
+ */
+int
+res_dnok(dn)
+	const char *dn;
+{
+	int ch;
+
+	while ((ch = *dn++) != '\0')
+		if (!domainchar(ch))
+			return (0);
+	return (1);
+}
+
+/*
+ * 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);
+}
+
+#ifdef NeXT
+/*
+ * nExt machines have some funky library conventions, which we must maintain.
+ */
+u_int16_t
+res_getshort(msgp)
+	register const u_char *msgp;
+{
+	return (_getshort(msgp));
+}
+#endif
+
+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);
+}