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 */ 28 29 #pragma once 30 31 #include "netd_resolv/resolv.h" 32 33 #include <stddef.h> 34 35 #include <vector> 36 37 struct __res_state; 38 39 /* sets the name server addresses to the provided res_state structure. The 40 * name servers are retrieved from the cache which is associated 41 * with the network to which the res_state structure is associated */ 42 void _resolv_populate_res_for_net(struct __res_state* statp); 43 44 std::vector<unsigned> resolv_list_caches(); 45 46 typedef enum { 47 RESOLV_CACHE_UNSUPPORTED, /* the cache can't handle that kind of queries */ 48 /* or the answer buffer is too small */ 49 RESOLV_CACHE_NOTFOUND, /* the cache doesn't know about this query */ 50 RESOLV_CACHE_FOUND, /* the cache found the answer */ 51 RESOLV_CACHE_SKIP /* Don't do anything on cache */ 52 } ResolvCacheStatus; 53 54 ResolvCacheStatus _resolv_cache_lookup(unsigned netid, const void* query, int querylen, 55 void* answer, int answersize, int* answerlen, 56 uint32_t flags); 57 58 /* add a (query,answer) to the cache, only call if _resolv_cache_lookup 59 * did return RESOLV_CACHE_NOTFOUND 60 */ 61 void _resolv_cache_add(unsigned netid, const void* query, int querylen, const void* answer, 62 int answerlen); 63 64 /* Notify the cache a request failed */ 65 void _resolv_cache_query_failed(unsigned netid, const void* query, int querylen, uint32_t flags); 66 67 // Sets name servers for a given network. 68 int resolv_set_nameservers_for_net(unsigned netid, const char** servers, int numservers, 69 const char* domains, const res_params* params); 70 71 // Creates the cache associated with the given network. 72 int resolv_create_cache_for_net(unsigned netid); 73 74 // Deletes the cache associated with the given network. 75 void resolv_delete_cache_for_net(unsigned netid); 76