1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/other-licenses/android/res_state.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,211 @@
1.4 +/*
1.5 + * Copyright (C) 2008 The Android Open Source Project
1.6 + * All rights reserved.
1.7 + *
1.8 + * Redistribution and use in source and binary forms, with or without
1.9 + * modification, are permitted provided that the following conditions
1.10 + * are met:
1.11 + * * Redistributions of source code must retain the above copyright
1.12 + * notice, this list of conditions and the following disclaimer.
1.13 + * * Redistributions in binary form must reproduce the above copyright
1.14 + * notice, this list of conditions and the following disclaimer in
1.15 + * the documentation and/or other materials provided with the
1.16 + * distribution.
1.17 + *
1.18 + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.19 + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.20 + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
1.21 + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
1.22 + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
1.23 + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
1.24 + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
1.25 + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
1.26 + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
1.27 + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
1.28 + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.29 + * SUCH DAMAGE.
1.30 + */
1.31 +
1.32 +/*
1.33 + * This version of this file is derived from Android 2.3 "Gingerbread",
1.34 + * which contains uncredited changes by Android/Google developers. It has
1.35 + * been modified in 2011 for use in the Android build of Mozilla Firefox by
1.36 + * Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>,
1.37 + * and Steve Workman <sjhworkman@gmail.com>).
1.38 + * These changes are offered under the same license as the original NetBSD
1.39 + * file, whose copyright and license are unchanged above.
1.40 + */
1.41 +
1.42 +/*
1.43 + * This version of this file is derived from Android 2.3 "Gingerbread",
1.44 + * which contains uncredited changes by Android/Google developers. It has
1.45 + * been modified in 2011 for use in the Android build of Mozilla Firefox by
1.46 + * Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>,
1.47 + * and Steve Workman <sjhworkman@gmail.com>).
1.48 + * These changes are offered under the same license as the original NetBSD
1.49 + * file, whose copyright and license are unchanged above.
1.50 + */
1.51 +
1.52 +#define ANDROID_CHANGES 1
1.53 +#define MOZILLA_NECKO_EXCLUDE_CODE 1
1.54 +
1.55 +#include <sys/cdefs.h>
1.56 +#include <sys/types.h>
1.57 +#include <arpa/inet.h>
1.58 +#include "arpa_nameser.h"
1.59 +#include <netdb.h>
1.60 +#include "resolv_private.h"
1.61 +#include "resolv_cache.h"
1.62 +#include <pthread.h>
1.63 +#include <stdlib.h>
1.64 +
1.65 +#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
1.66 +#include <sys/_system_properties.h>
1.67 +
1.68 +static pthread_key_t _res_key;
1.69 +static pthread_once_t _res_once;
1.70 +
1.71 +typedef struct {
1.72 + int _h_errno;
1.73 + struct __res_state _nres[1];
1.74 + unsigned _serial;
1.75 + struct prop_info* _pi;
1.76 + struct res_static _rstatic[1];
1.77 +} _res_thread;
1.78 +
1.79 +static _res_thread*
1.80 +_res_thread_alloc(void)
1.81 +{
1.82 + _res_thread* rt = malloc(sizeof(*rt));
1.83 +
1.84 + if (rt) {
1.85 + rt->_h_errno = 0;
1.86 + /* Special system property which tracks any changes to 'net.*'. */
1.87 + rt->_serial = 0;
1.88 + rt->_pi = (struct prop_info*) __system_property_find("net.change");
1.89 + if (rt->_pi) {
1.90 + rt->_serial = rt->_pi->serial;
1.91 + }
1.92 + if ( res_ninit( rt->_nres ) < 0 ) {
1.93 + free(rt);
1.94 + rt = NULL;
1.95 + } else {
1.96 + memset(rt->_rstatic, 0, sizeof rt->_rstatic);
1.97 + }
1.98 + }
1.99 + return rt;
1.100 +}
1.101 +
1.102 +static void
1.103 +_res_static_done( res_static rs )
1.104 +{
1.105 + /* fortunately, there is nothing to do here, since the
1.106 + * points in h_addr_ptrs and host_aliases should all
1.107 + * point to 'hostbuf'
1.108 + */
1.109 + if (rs->hostf) { /* should not happen in theory, but just be safe */
1.110 + fclose(rs->hostf);
1.111 + rs->hostf = NULL;
1.112 + }
1.113 + free(rs->servent.s_aliases);
1.114 +}
1.115 +
1.116 +static void
1.117 +_res_thread_free( void* _rt )
1.118 +{
1.119 + _res_thread* rt = _rt;
1.120 +
1.121 + _res_static_done(rt->_rstatic);
1.122 + res_ndestroy(rt->_nres);
1.123 + free(rt);
1.124 +}
1.125 +
1.126 +static void
1.127 +_res_init_key( void )
1.128 +{
1.129 + pthread_key_create( &_res_key, _res_thread_free );
1.130 +}
1.131 +
1.132 +static _res_thread*
1.133 +_res_thread_get(void)
1.134 +{
1.135 + _res_thread* rt;
1.136 + pthread_once( &_res_once, _res_init_key );
1.137 + rt = pthread_getspecific( _res_key );
1.138 + if (rt == NULL) {
1.139 + if ((rt = _res_thread_alloc()) == NULL) {
1.140 + return NULL;
1.141 + }
1.142 + rt->_h_errno = 0;
1.143 + rt->_serial = 0;
1.144 + pthread_setspecific( _res_key, rt );
1.145 + }
1.146 + /* Check the serial value for any chanes to net.* properties. */
1.147 + if (rt->_pi == NULL) {
1.148 + rt->_pi = (struct prop_info*) __system_property_find("net.change");
1.149 + }
1.150 + if (rt->_pi == NULL || rt->_serial == rt->_pi->serial) {
1.151 + return rt;
1.152 + }
1.153 + rt->_serial = rt->_pi->serial;
1.154 + /* Reload from system properties. */
1.155 + if ( res_ninit( rt->_nres ) < 0 ) {
1.156 + free(rt);
1.157 + rt = NULL;
1.158 + pthread_setspecific( _res_key, rt );
1.159 + }
1.160 +#ifdef USE_RESOLV_CACHE
1.161 + _resolv_cache_reset(rt->_serial);
1.162 +#endif
1.163 + return rt;
1.164 +}
1.165 +
1.166 +struct __res_state _nres;
1.167 +
1.168 +#if 0
1.169 +struct resolv_cache*
1.170 +__get_res_cache(void)
1.171 +{
1.172 + _res_thread* rt = _res_thread_get();
1.173 +
1.174 + if (!rt)
1.175 + return NULL;
1.176 +
1.177 + if (!rt->_cache) {
1.178 + rt->_cache = _resolv_cache_create();
1.179 + }
1.180 + return rt->_cache;
1.181 +}
1.182 +#endif
1.183 +
1.184 +int*
1.185 +__get_h_errno(void)
1.186 +{
1.187 + _res_thread* rt = _res_thread_get();
1.188 + static int panic = NETDB_INTERNAL;
1.189 +
1.190 + return rt ? &rt->_h_errno : &panic;
1.191 +}
1.192 +
1.193 +res_state
1.194 +__res_get_state(void)
1.195 +{
1.196 + _res_thread* rt = _res_thread_get();
1.197 +
1.198 + return rt ? rt->_nres : NULL;
1.199 +}
1.200 +
1.201 +void
1.202 +__res_put_state(res_state res)
1.203 +{
1.204 + /* nothing to do */
1.205 + res=res;
1.206 +}
1.207 +
1.208 +res_static
1.209 +__res_get_static(void)
1.210 +{
1.211 + _res_thread* rt = _res_thread_get();
1.212 +
1.213 + return rt ? rt->_rstatic : NULL;
1.214 +}
