other-licenses/android/resolv_cache.h@7e26c7da4463 (annotated)
other-licenses/android/resolv_cache.h
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
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright (C) 2008 The Android Open Source Project |
| michael@0 | 3 | * All rights reserved. |
| michael@0 | 4 | * |
| michael@0 | 5 | * Redistribution and use in source and binary forms, with or without |
| michael@0 | 6 | * modification, are permitted provided that the following conditions |
| michael@0 | 7 | * are met: |
| michael@0 | 8 | * * Redistributions of source code must retain the above copyright |
| michael@0 | 9 | * notice, this list of conditions and the following disclaimer. |
| michael@0 | 10 | * * Redistributions in binary form must reproduce the above copyright |
| michael@0 | 11 | * notice, this list of conditions and the following disclaimer in |
| michael@0 | 12 | * the documentation and/or other materials provided with the |
| michael@0 | 13 | * distribution. |
| michael@0 | 14 | * |
| michael@0 | 15 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| michael@0 | 16 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| michael@0 | 17 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| michael@0 | 18 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| michael@0 | 19 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| michael@0 | 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| michael@0 | 21 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| michael@0 | 22 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| michael@0 | 23 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| michael@0 | 24 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| michael@0 | 25 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| michael@0 | 26 | * SUCH DAMAGE. |
| michael@0 | 27 | */ |
| michael@0 | 28 | |
| michael@0 | 29 | /* |
| michael@0 | 30 | * This version of this file is derived from Android 2.3 "Gingerbread", |
| michael@0 | 31 | * which contains uncredited changes by Android/Google developers. It has |
| michael@0 | 32 | * been modified in 2011 for use in the Android build of Mozilla Firefox by |
| michael@0 | 33 | * Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>, |
| michael@0 | 34 | * and Steve Workman <sjhworkman@gmail.com>). |
| michael@0 | 35 | * These changes are offered under the same license as the original NetBSD |
| michael@0 | 36 | * file, whose copyright and license are unchanged above. |
| michael@0 | 37 | */ |
| michael@0 | 38 | |
| michael@0 | 39 | #ifndef _RESOLV_CACHE_H_ |
| michael@0 | 40 | #define _RESOLV_CACHE_H_ |
| michael@0 | 41 | |
| michael@0 | 42 | struct resolv_cache; /* forward */ |
| michael@0 | 43 | |
| michael@0 | 44 | /* get cache instance, can be NULL if cache is disabled |
| michael@0 | 45 | * (e.g. through an environment variable) */ |
| michael@0 | 46 | extern struct resolv_cache* __get_res_cache(void); |
| michael@0 | 47 | |
| michael@0 | 48 | /* this gets called everytime we detect some changes in the DNS configuration |
| michael@0 | 49 | * and will flush the cache */ |
| michael@0 | 50 | extern void _resolv_cache_reset( unsigned generation ); |
| michael@0 | 51 | |
| michael@0 | 52 | typedef enum { |
| michael@0 | 53 | RESOLV_CACHE_UNSUPPORTED, /* the cache can't handle that kind of queries */ |
| michael@0 | 54 | /* or the answer buffer is too small */ |
| michael@0 | 55 | RESOLV_CACHE_NOTFOUND, /* the cache doesn't know about this query */ |
| michael@0 | 56 | RESOLV_CACHE_FOUND /* the cache found the answer */ |
| michael@0 | 57 | } ResolvCacheStatus; |
| michael@0 | 58 | |
| michael@0 | 59 | extern ResolvCacheStatus |
| michael@0 | 60 | _resolv_cache_lookup( struct resolv_cache* cache, |
| michael@0 | 61 | const void* query, |
| michael@0 | 62 | int querylen, |
| michael@0 | 63 | void* answer, |
| michael@0 | 64 | int answersize, |
| michael@0 | 65 | int *answerlen ); |
| michael@0 | 66 | |
| michael@0 | 67 | /* add a (query,answer) to the cache, only call if _resolv_cache_lookup |
| michael@0 | 68 | * did return RESOLV_CACHE_NOTFOUND |
| michael@0 | 69 | */ |
| michael@0 | 70 | extern void |
| michael@0 | 71 | _resolv_cache_add( struct resolv_cache* cache, |
| michael@0 | 72 | const void* query, |
| michael@0 | 73 | int querylen, |
| michael@0 | 74 | const void* answer, |
| michael@0 | 75 | int answerlen ); |
| michael@0 | 76 | |
| michael@0 | 77 | #endif /* _RESOLV_CACHE_H_ */ |
