The Tor Browser: other-licenses/android/res_comp.c@7e26c7da4463 (annotated)

other-licenses/android/res_comp.c@7e26c7da4463 (annotated)

other-licenses/android/res_comp.c

Wed, 31 Dec 2014 06:55:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:55:50 +0100
changeset 2: 7e26c7da4463
permissions: -rw-r--r--

Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2

 /*	$NetBSD: res_comp.c,v 1.6 2004/05/22 23:47:09 christos Exp $	*/
 /*
  * 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 (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
  * Portions Copyright (c) 1996-1999 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 ISC DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC 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.
  */
 /*
  * This version of this file is derived from Android 2.3 "Gingerbread",
  * which contains uncredited changes by Android/Google developers.  It has
  * been modified in 2011 for use in the Android build of Mozilla Firefox by
  * Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>,
  * and Steve Workman <sjhworkman@gmail.com>).
  * These changes are offered under the same license as the original NetBSD
  * file, whose copyright and license are unchanged above.
  */
 #define ANDROID_CHANGES 1
 #define MOZILLA_NECKO_EXCLUDE_CODE 1
 #include <sys/cdefs.h>
 #if defined(LIBC_SCCS) && !defined(lint)
 #ifdef notdef
 static const char sccsid[] = "@(#)res_comp.c	8.1 (Berkeley) 6/4/93";
 static const char rcsid[] = "Id: res_comp.c,v 1.1.2.1.4.1 2004/03/09 08:33:54 marka Exp";
 #else
 __RCSID("$NetBSD: res_comp.c,v 1.6 2004/05/22 23:47:09 christos 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 <ctype.h>
 #ifdef ANDROID_CHANGES
 #include "resolv_private.h"
 #else
 #include <resolv.h>
 #endif
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 /*
  * Expand compressed domain name 'src' to full domain name.
  * 'msg' is a pointer to the begining of the message,
  * 'eom' points to the first location after the message,
  * 'dst' is a pointer to a buffer of size 'dstsiz' for the result.
  * Return size of compressed name or -1 if there was an error.
  */
 int
 dn_expand(const u_char *msg, const u_char *eom, const u_char *src,
 	  char *dst, int dstsiz)
 {
 	int n = ns_name_uncompress(msg, eom, src, dst, (size_t)dstsiz);
 	if (n > 0 && dst[0] == '.')
 		dst[0] = '\0';
 	return (n);
 }
 /*
  * Pack domain name 'exp_dn' in presentation form into 'comp_dn'.
  * Return the size of the compressed name or -1.
  * 'length' is the size of the array pointed to by 'comp_dn'.
  */
 int
 dn_comp(const char *src, u_char *dst, int dstsiz,
 	u_char **dnptrs, u_char **lastdnptr)
 {
 	return (ns_name_compress(src, dst, (size_t)dstsiz,
 				 (const u_char **)dnptrs,
 				 (const u_char **)lastdnptr));
 }
 /*
  * Skip over a compressed domain name. Return the size or -1.
  */
 int
 dn_skipname(const u_char *ptr, const u_char *eom) {
 	const u_char *saveptr = ptr;
 	if (ns_name_skip(&ptr, eom) == -1)
 		return (-1);
 	return (ptr - saveptr);
 }
 /*
  * 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.
  */
 /* BIONIC: We also accept underscores in the middle of labels.
  *         This extension is needed to make resolution on some VPN networks
  *         work properly.
  */
 #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 underscorechar(c)  ((c) == 0x5f)
 #define borderchar(c) (alphachar(c) || digitchar(c))
 #define middlechar(c) (borderchar(c) || hyphenchar(c) || underscorechar(c))
 #define	domainchar(c) ((c) > 0x20 && (c) < 0x7f)
 int
 res_hnok(const char *dn) {
 	int pch = PERIOD, ch = *dn++;
 	while (ch != '\0') {
 		int nch = *dn++;
 		if (periodchar(ch)) {
 			;
 		} 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);
 		}
 		pch = ch, ch = nch;
 	}
 	return (1);
 }
 #ifndef MOZILLA_NECKO_EXCLUDE_CODE
 /*
  * hostname-like (A, MX, WKS) owners can have "*" as their first label
  * but must otherwise be as a host name.
  */
 int
 res_ownok(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(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(const char *dn) {
 	int ch;
 	while ((ch = *dn++) != '\0')
 		if (!domainchar(ch))
 			return (0);
 	return (1);
 }
 #endif
 #ifdef BIND_4_COMPAT
 /*
  * 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.
  */
 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); }
 #ifndef __ultrix__
 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 /*__ultrix__*/
 #endif /*BIND_4_COMPAT*/

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other-licenses/android/res_comp.c@7e26c7da4463 (annotated)

other-licenses/android/res_comp.c