other-licenses/android/resolv_cache.h@97036ab72558
other-licenses/android/resolv_cache.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
29 /*
30 * This version of this file is derived from Android 2.3 "Gingerbread",
31 * which contains uncredited changes by Android/Google developers. It has
32 * been modified in 2011 for use in the Android build of Mozilla Firefox by
33 * Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>,
34 * and Steve Workman <sjhworkman@gmail.com>).
35 * These changes are offered under the same license as the original NetBSD
36 * file, whose copyright and license are unchanged above.
37 */
39 #ifndef _RESOLV_CACHE_H_
40 #define _RESOLV_CACHE_H_
42 struct resolv_cache; /* forward */
44 /* get cache instance, can be NULL if cache is disabled
45 * (e.g. through an environment variable) */
46 extern struct resolv_cache* __get_res_cache(void);
48 /* this gets called everytime we detect some changes in the DNS configuration
49 * and will flush the cache */
50 extern void _resolv_cache_reset( unsigned generation );
52 typedef enum {
53 RESOLV_CACHE_UNSUPPORTED, /* the cache can't handle that kind of queries */
54 /* or the answer buffer is too small */
55 RESOLV_CACHE_NOTFOUND, /* the cache doesn't know about this query */
56 RESOLV_CACHE_FOUND /* the cache found the answer */
57 } ResolvCacheStatus;
59 extern ResolvCacheStatus
60 _resolv_cache_lookup( struct resolv_cache* cache,
61 const void* query,
62 int querylen,
63 void* answer,
64 int answersize,
65 int *answerlen );
67 /* add a (query,answer) to the cache, only call if _resolv_cache_lookup
68 * did return RESOLV_CACHE_NOTFOUND
69 */
70 extern void
71 _resolv_cache_add( struct resolv_cache* cache,
72 const void* query,
73 int querylen,
74 const void* answer,
75 int answerlen );
77 #endif /* _RESOLV_CACHE_H_ */
