1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/other-licenses/android/ns_parse.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,222 @@
1.4 +/* $NetBSD: ns_parse.c,v 1.2 2004/05/20 20:35:05 christos Exp $ */
1.5 +
1.6 +/*
1.7 + * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
1.8 + * Copyright (c) 1996,1999 by Internet Software Consortium.
1.9 + *
1.10 + * Permission to use, copy, modify, and distribute this software for any
1.11 + * purpose with or without fee is hereby granted, provided that the above
1.12 + * copyright notice and this permission notice appear in all copies.
1.13 + *
1.14 + * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
1.15 + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.16 + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
1.17 + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1.18 + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
1.19 + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
1.20 + * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.21 + */
1.22 +
1.23 +/*
1.24 + * This version of this file is derived from Android 2.3 "Gingerbread",
1.25 + * which contains uncredited changes by Android/Google developers. It has
1.26 + * been modified in 2011 for use in the Android build of Mozilla Firefox by
1.27 + * Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>,
1.28 + * and Steve Workman <sjhworkman@gmail.com>).
1.29 + * These changes are offered under the same license as the original NetBSD
1.30 + * file, whose copyright and license are unchanged above.
1.31 + */
1.32 +
1.33 +#define ANDROID_CHANGES 1
1.34 +#define MOZILLA_NECKO_EXCLUDE_CODE 1
1.35 +
1.36 +#include <sys/cdefs.h>
1.37 +#ifndef lint
1.38 +#ifdef notdef
1.39 +static const char rcsid[] = "Id: ns_parse.c,v 1.3.2.1.4.1 2004/03/09 08:33:44 marka Exp";
1.40 +#else
1.41 +__RCSID("$NetBSD: ns_parse.c,v 1.2 2004/05/20 20:35:05 christos Exp $");
1.42 +#endif
1.43 +#endif
1.44 +
1.45 +/* Import. */
1.46 +
1.47 +#include <sys/types.h>
1.48 +
1.49 +#include <netinet/in.h>
1.50 +#include "arpa_nameser.h"
1.51 +
1.52 +#include <errno.h>
1.53 +#ifdef ANDROID_CHANGES
1.54 +#include "resolv_private.h"
1.55 +#else
1.56 +#include <resolv.h>
1.57 +#endif
1.58 +#include <string.h>
1.59 +
1.60 +/* Forward. */
1.61 +
1.62 +static void setsection(ns_msg *msg, ns_sect sect);
1.63 +
1.64 +/* Macros. */
1.65 +
1.66 +#define RETERR(err) do { errno = (err); return (-1); } while (/*NOTREACHED*//*CONSTCOND*/0)
1.67 +
1.68 +/* Public. */
1.69 +
1.70 +/* These need to be in the same order as the nres.h:ns_flag enum. */
1.71 +const struct _ns_flagdata _ns_flagdata[16] = {
1.72 + { 0x8000, 15 }, /* qr. */
1.73 + { 0x7800, 11 }, /* opcode. */
1.74 + { 0x0400, 10 }, /* aa. */
1.75 + { 0x0200, 9 }, /* tc. */
1.76 + { 0x0100, 8 }, /* rd. */
1.77 + { 0x0080, 7 }, /* ra. */
1.78 + { 0x0040, 6 }, /* z. */
1.79 + { 0x0020, 5 }, /* ad. */
1.80 + { 0x0010, 4 }, /* cd. */
1.81 + { 0x000f, 0 }, /* rcode. */
1.82 + { 0x0000, 0 }, /* expansion (1/6). */
1.83 + { 0x0000, 0 }, /* expansion (2/6). */
1.84 + { 0x0000, 0 }, /* expansion (3/6). */
1.85 + { 0x0000, 0 }, /* expansion (4/6). */
1.86 + { 0x0000, 0 }, /* expansion (5/6). */
1.87 + { 0x0000, 0 }, /* expansion (6/6). */
1.88 +};
1.89 +
1.90 +int ns_msg_getflag(ns_msg handle, int flag) {
1.91 + return((u_int32_t)((handle)._flags & _ns_flagdata[flag].mask) >> _ns_flagdata[flag].shift);
1.92 +}
1.93 +
1.94 +int
1.95 +ns_skiprr(const u_char *ptr, const u_char *eom, ns_sect section, int count) {
1.96 + const u_char *optr = ptr;
1.97 +
1.98 + for (; count > 0; count--) {
1.99 + int b, rdlength;
1.100 +
1.101 + b = dn_skipname(ptr, eom);
1.102 + if (b < 0)
1.103 + RETERR(EMSGSIZE);
1.104 + ptr += b/*Name*/ + NS_INT16SZ/*Type*/ + NS_INT16SZ/*Class*/;
1.105 + if (section != ns_s_qd) {
1.106 + if (ptr + NS_INT32SZ + NS_INT16SZ > eom)
1.107 + RETERR(EMSGSIZE);
1.108 + ptr += NS_INT32SZ/*TTL*/;
1.109 + NS_GET16(rdlength, ptr);
1.110 + ptr += rdlength/*RData*/;
1.111 + }
1.112 + }
1.113 + if (ptr > eom)
1.114 + RETERR(EMSGSIZE);
1.115 + return (ptr - optr);
1.116 +}
1.117 +
1.118 +int
1.119 +ns_initparse(const u_char *msg, int msglen, ns_msg *handle) {
1.120 + const u_char *eom = msg + msglen;
1.121 + int i;
1.122 +
1.123 + memset(handle, 0x5e, sizeof *handle);
1.124 + handle->_msg = msg;
1.125 + handle->_eom = eom;
1.126 + if (msg + NS_INT16SZ > eom)
1.127 + RETERR(EMSGSIZE);
1.128 + NS_GET16(handle->_id, msg);
1.129 + if (msg + NS_INT16SZ > eom)
1.130 + RETERR(EMSGSIZE);
1.131 + NS_GET16(handle->_flags, msg);
1.132 + for (i = 0; i < ns_s_max; i++) {
1.133 + if (msg + NS_INT16SZ > eom)
1.134 + RETERR(EMSGSIZE);
1.135 + NS_GET16(handle->_counts[i], msg);
1.136 + }
1.137 + for (i = 0; i < ns_s_max; i++)
1.138 + if (handle->_counts[i] == 0)
1.139 + handle->_sections[i] = NULL;
1.140 + else {
1.141 + int b = ns_skiprr(msg, eom, (ns_sect)i,
1.142 + handle->_counts[i]);
1.143 +
1.144 + if (b < 0)
1.145 + return (-1);
1.146 + handle->_sections[i] = msg;
1.147 + msg += b;
1.148 + }
1.149 + if (msg != eom)
1.150 + RETERR(EMSGSIZE);
1.151 + setsection(handle, ns_s_max);
1.152 + return (0);
1.153 +}
1.154 +
1.155 +int
1.156 +ns_parserr(ns_msg *handle, ns_sect section, int rrnum, ns_rr *rr) {
1.157 + int b;
1.158 +
1.159 + /* Make section right. */
1.160 + if ((unsigned)section >= (unsigned)ns_s_max)
1.161 + RETERR(ENODEV);
1.162 + if (section != handle->_sect)
1.163 + setsection(handle, section);
1.164 +
1.165 + /* Make rrnum right. */
1.166 + if (rrnum == -1)
1.167 + rrnum = handle->_rrnum;
1.168 + if (rrnum < 0 || rrnum >= handle->_counts[(int)section])
1.169 + RETERR(ENODEV);
1.170 + if (rrnum < handle->_rrnum)
1.171 + setsection(handle, section);
1.172 + if (rrnum > handle->_rrnum) {
1.173 + b = ns_skiprr(handle->_msg_ptr, handle->_eom, section,
1.174 + rrnum - handle->_rrnum);
1.175 +
1.176 + if (b < 0)
1.177 + return (-1);
1.178 + handle->_msg_ptr += b;
1.179 + handle->_rrnum = rrnum;
1.180 + }
1.181 +
1.182 + /* Do the parse. */
1.183 + b = dn_expand(handle->_msg, handle->_eom,
1.184 + handle->_msg_ptr, rr->name, NS_MAXDNAME);
1.185 + if (b < 0)
1.186 + return (-1);
1.187 + handle->_msg_ptr += b;
1.188 + if (handle->_msg_ptr + NS_INT16SZ + NS_INT16SZ > handle->_eom)
1.189 + RETERR(EMSGSIZE);
1.190 + NS_GET16(rr->type, handle->_msg_ptr);
1.191 + NS_GET16(rr->rr_class, handle->_msg_ptr);
1.192 + if (section == ns_s_qd) {
1.193 + rr->ttl = 0;
1.194 + rr->rdlength = 0;
1.195 + rr->rdata = NULL;
1.196 + } else {
1.197 + if (handle->_msg_ptr + NS_INT32SZ + NS_INT16SZ > handle->_eom)
1.198 + RETERR(EMSGSIZE);
1.199 + NS_GET32(rr->ttl, handle->_msg_ptr);
1.200 + NS_GET16(rr->rdlength, handle->_msg_ptr);
1.201 + if (handle->_msg_ptr + rr->rdlength > handle->_eom)
1.202 + RETERR(EMSGSIZE);
1.203 + rr->rdata = handle->_msg_ptr;
1.204 + handle->_msg_ptr += rr->rdlength;
1.205 + }
1.206 + if (++handle->_rrnum > handle->_counts[(int)section])
1.207 + setsection(handle, (ns_sect)((int)section + 1));
1.208 +
1.209 + /* All done. */
1.210 + return (0);
1.211 +}
1.212 +
1.213 +/* Private. */
1.214 +
1.215 +static void
1.216 +setsection(ns_msg *msg, ns_sect sect) {
1.217 + msg->_sect = sect;
1.218 + if (sect == ns_s_max) {
1.219 + msg->_rrnum = -1;
1.220 + msg->_msg_ptr = NULL;
1.221 + } else {
1.222 + msg->_rrnum = 0;
1.223 + msg->_msg_ptr = msg->_sections[(int)sect];
1.224 + }
1.225 +}
