1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/other-licenses/android/res_comp.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,282 @@
1.4 +/* $NetBSD: res_comp.c,v 1.6 2004/05/22 23:47:09 christos Exp $ */
1.5 +
1.6 +/*
1.7 + * Copyright (c) 1985, 1993
1.8 + * The Regents of the University of California. All rights reserved.
1.9 + *
1.10 + * Redistribution and use in source and binary forms, with or without
1.11 + * modification, are permitted provided that the following conditions
1.12 + * are met:
1.13 + * 1. Redistributions of source code must retain the above copyright
1.14 + * notice, this list of conditions and the following disclaimer.
1.15 + * 2. Redistributions in binary form must reproduce the above copyright
1.16 + * notice, this list of conditions and the following disclaimer in the
1.17 + * documentation and/or other materials provided with the distribution.
1.18 + * 3. All advertising materials mentioning features or use of this software
1.19 + * must display the following acknowledgement:
1.20 + * This product includes software developed by the University of
1.21 + * California, Berkeley and its contributors.
1.22 + * 4. Neither the name of the University nor the names of its contributors
1.23 + * may be used to endorse or promote products derived from this software
1.24 + * without specific prior written permission.
1.25 + *
1.26 + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
1.27 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.28 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.29 + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
1.30 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.31 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.32 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.33 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.34 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.35 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.36 + * SUCH DAMAGE.
1.37 + */
1.38 +
1.39 +/*
1.40 + * Portions Copyright (c) 1993 by Digital Equipment Corporation.
1.41 + *
1.42 + * Permission to use, copy, modify, and distribute this software for any
1.43 + * purpose with or without fee is hereby granted, provided that the above
1.44 + * copyright notice and this permission notice appear in all copies, and that
1.45 + * the name of Digital Equipment Corporation not be used in advertising or
1.46 + * publicity pertaining to distribution of the document or software without
1.47 + * specific, written prior permission.
1.48 + *
1.49 + * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
1.50 + * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
1.51 + * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
1.52 + * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
1.53 + * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
1.54 + * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
1.55 + * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
1.56 + * SOFTWARE.
1.57 + */
1.58 +
1.59 +/*
1.60 + * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
1.61 + * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
1.62 + *
1.63 + * Permission to use, copy, modify, and distribute this software for any
1.64 + * purpose with or without fee is hereby granted, provided that the above
1.65 + * copyright notice and this permission notice appear in all copies.
1.66 + *
1.67 + * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
1.68 + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.69 + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
1.70 + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1.71 + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
1.72 + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
1.73 + * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.74 + */
1.75 +
1.76 +/*
1.77 + * This version of this file is derived from Android 2.3 "Gingerbread",
1.78 + * which contains uncredited changes by Android/Google developers. It has
1.79 + * been modified in 2011 for use in the Android build of Mozilla Firefox by
1.80 + * Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>,
1.81 + * and Steve Workman <sjhworkman@gmail.com>).
1.82 + * These changes are offered under the same license as the original NetBSD
1.83 + * file, whose copyright and license are unchanged above.
1.84 + */
1.85 +
1.86 +#define ANDROID_CHANGES 1
1.87 +#define MOZILLA_NECKO_EXCLUDE_CODE 1
1.88 +
1.89 +#include <sys/cdefs.h>
1.90 +#if defined(LIBC_SCCS) && !defined(lint)
1.91 +#ifdef notdef
1.92 +static const char sccsid[] = "@(#)res_comp.c 8.1 (Berkeley) 6/4/93";
1.93 +static const char rcsid[] = "Id: res_comp.c,v 1.1.2.1.4.1 2004/03/09 08:33:54 marka Exp";
1.94 +#else
1.95 +__RCSID("$NetBSD: res_comp.c,v 1.6 2004/05/22 23:47:09 christos Exp $");
1.96 +#endif
1.97 +#endif /* LIBC_SCCS and not lint */
1.98 +
1.99 +#include <sys/types.h>
1.100 +#include <sys/param.h>
1.101 +#include <netinet/in.h>
1.102 +#include "arpa_nameser.h"
1.103 +#include <ctype.h>
1.104 +#ifdef ANDROID_CHANGES
1.105 +#include "resolv_private.h"
1.106 +#else
1.107 +#include <resolv.h>
1.108 +#endif
1.109 +#include <stdio.h>
1.110 +#include <string.h>
1.111 +#include <unistd.h>
1.112 +
1.113 +/*
1.114 + * Expand compressed domain name 'src' to full domain name.
1.115 + * 'msg' is a pointer to the begining of the message,
1.116 + * 'eom' points to the first location after the message,
1.117 + * 'dst' is a pointer to a buffer of size 'dstsiz' for the result.
1.118 + * Return size of compressed name or -1 if there was an error.
1.119 + */
1.120 +int
1.121 +dn_expand(const u_char *msg, const u_char *eom, const u_char *src,
1.122 + char *dst, int dstsiz)
1.123 +{
1.124 + int n = ns_name_uncompress(msg, eom, src, dst, (size_t)dstsiz);
1.125 +
1.126 + if (n > 0 && dst[0] == '.')
1.127 + dst[0] = '\0';
1.128 + return (n);
1.129 +}
1.130 +
1.131 +/*
1.132 + * Pack domain name 'exp_dn' in presentation form into 'comp_dn'.
1.133 + * Return the size of the compressed name or -1.
1.134 + * 'length' is the size of the array pointed to by 'comp_dn'.
1.135 + */
1.136 +int
1.137 +dn_comp(const char *src, u_char *dst, int dstsiz,
1.138 + u_char **dnptrs, u_char **lastdnptr)
1.139 +{
1.140 + return (ns_name_compress(src, dst, (size_t)dstsiz,
1.141 + (const u_char **)dnptrs,
1.142 + (const u_char **)lastdnptr));
1.143 +}
1.144 +
1.145 +/*
1.146 + * Skip over a compressed domain name. Return the size or -1.
1.147 + */
1.148 +int
1.149 +dn_skipname(const u_char *ptr, const u_char *eom) {
1.150 + const u_char *saveptr = ptr;
1.151 +
1.152 + if (ns_name_skip(&ptr, eom) == -1)
1.153 + return (-1);
1.154 + return (ptr - saveptr);
1.155 +}
1.156 +
1.157 +/*
1.158 + * Verify that a domain name uses an acceptable character set.
1.159 + */
1.160 +
1.161 +/*
1.162 + * Note the conspicuous absence of ctype macros in these definitions. On
1.163 + * non-ASCII hosts, we can't depend on string literals or ctype macros to
1.164 + * tell us anything about network-format data. The rest of the BIND system
1.165 + * is not careful about this, but for some reason, we're doing it right here.
1.166 + */
1.167 +
1.168 +/* BIONIC: We also accept underscores in the middle of labels.
1.169 + * This extension is needed to make resolution on some VPN networks
1.170 + * work properly.
1.171 + */
1.172 +
1.173 +#define PERIOD 0x2e
1.174 +#define hyphenchar(c) ((c) == 0x2d)
1.175 +#define bslashchar(c) ((c) == 0x5c)
1.176 +#define periodchar(c) ((c) == PERIOD)
1.177 +#define asterchar(c) ((c) == 0x2a)
1.178 +#define alphachar(c) (((c) >= 0x41 && (c) <= 0x5a) \
1.179 + || ((c) >= 0x61 && (c) <= 0x7a))
1.180 +#define digitchar(c) ((c) >= 0x30 && (c) <= 0x39)
1.181 +#define underscorechar(c) ((c) == 0x5f)
1.182 +
1.183 +#define borderchar(c) (alphachar(c) || digitchar(c))
1.184 +#define middlechar(c) (borderchar(c) || hyphenchar(c) || underscorechar(c))
1.185 +#define domainchar(c) ((c) > 0x20 && (c) < 0x7f)
1.186 +
1.187 +int
1.188 +res_hnok(const char *dn) {
1.189 + int pch = PERIOD, ch = *dn++;
1.190 +
1.191 + while (ch != '\0') {
1.192 + int nch = *dn++;
1.193 +
1.194 + if (periodchar(ch)) {
1.195 + ;
1.196 + } else if (periodchar(pch)) {
1.197 + if (!borderchar(ch))
1.198 + return (0);
1.199 + } else if (periodchar(nch) || nch == '\0') {
1.200 + if (!borderchar(ch))
1.201 + return (0);
1.202 + } else {
1.203 + if (!middlechar(ch))
1.204 + return (0);
1.205 + }
1.206 + pch = ch, ch = nch;
1.207 + }
1.208 + return (1);
1.209 +}
1.210 +
1.211 +#ifndef MOZILLA_NECKO_EXCLUDE_CODE
1.212 +/*
1.213 + * hostname-like (A, MX, WKS) owners can have "*" as their first label
1.214 + * but must otherwise be as a host name.
1.215 + */
1.216 +int
1.217 +res_ownok(const char *dn) {
1.218 + if (asterchar(dn[0])) {
1.219 + if (periodchar(dn[1]))
1.220 + return (res_hnok(dn+2));
1.221 + if (dn[1] == '\0')
1.222 + return (1);
1.223 + }
1.224 + return (res_hnok(dn));
1.225 +}
1.226 +
1.227 +/*
1.228 + * SOA RNAMEs and RP RNAMEs can have any printable character in their first
1.229 + * label, but the rest of the name has to look like a host name.
1.230 + */
1.231 +int
1.232 +res_mailok(const char *dn) {
1.233 + int ch, escaped = 0;
1.234 +
1.235 + /* "." is a valid missing representation */
1.236 + if (*dn == '\0')
1.237 + return (1);
1.238 +
1.239 + /* otherwise <label>.<hostname> */
1.240 + while ((ch = *dn++) != '\0') {
1.241 + if (!domainchar(ch))
1.242 + return (0);
1.243 + if (!escaped && periodchar(ch))
1.244 + break;
1.245 + if (escaped)
1.246 + escaped = 0;
1.247 + else if (bslashchar(ch))
1.248 + escaped = 1;
1.249 + }
1.250 + if (periodchar(ch))
1.251 + return (res_hnok(dn));
1.252 + return (0);
1.253 +}
1.254 +
1.255 +/*
1.256 + * This function is quite liberal, since RFC 1034's character sets are only
1.257 + * recommendations.
1.258 + */
1.259 +int
1.260 +res_dnok(const char *dn) {
1.261 + int ch;
1.262 +
1.263 + while ((ch = *dn++) != '\0')
1.264 + if (!domainchar(ch))
1.265 + return (0);
1.266 + return (1);
1.267 +}
1.268 +#endif
1.269 +
1.270 +#ifdef BIND_4_COMPAT
1.271 +/*
1.272 + * This module must export the following externally-visible symbols:
1.273 + * ___putlong
1.274 + * ___putshort
1.275 + * __getlong
1.276 + * __getshort
1.277 + * Note that one _ comes from C and the others come from us.
1.278 + */
1.279 +void __putlong(u_int32_t src, u_char *dst) { ns_put32(src, dst); }
1.280 +void __putshort(u_int16_t src, u_char *dst) { ns_put16(src, dst); }
1.281 +#ifndef __ultrix__
1.282 +u_int32_t _getlong(const u_char *src) { return (ns_get32(src)); }
1.283 +u_int16_t _getshort(const u_char *src) { return (ns_get16(src)); }
1.284 +#endif /*__ultrix__*/
1.285 +#endif /*BIND_4_COMPAT*/
