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- /*
- * Copyright (C) 2008 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #pragma once
- #include "netd_resolv/resolv.h"
- #include <stddef.h>
- #include <unordered_map>
- #include <vector>
- struct __res_state;
- constexpr int DNSEVENT_SUBSAMPLING_MAP_DEFAULT_KEY = -1;
- /* sets the name server addresses to the provided res_state structure. The
- * name servers are retrieved from the cache which is associated
- * with the network to which the res_state structure is associated */
- void _resolv_populate_res_for_net(struct __res_state* statp);
- std::vector<unsigned> resolv_list_caches();
- std::vector<std::string> resolv_cache_dump_subsampling_map(unsigned netid);
- uint32_t resolv_cache_get_subsampling_denom(unsigned netid, int return_code);
- typedef enum {
- RESOLV_CACHE_UNSUPPORTED, /* the cache can't handle that kind of queries */
- /* or the answer buffer is too small */
- RESOLV_CACHE_NOTFOUND, /* the cache doesn't know about this query */
- RESOLV_CACHE_FOUND, /* the cache found the answer */
- RESOLV_CACHE_SKIP /* Don't do anything on cache */
- } ResolvCacheStatus;
- ResolvCacheStatus _resolv_cache_lookup(unsigned netid, const void* query, int querylen,
- void* answer, int answersize, int* answerlen,
- uint32_t flags);
- /* add a (query,answer) to the cache, only call if _resolv_cache_lookup
- * did return RESOLV_CACHE_NOTFOUND
- */
- void _resolv_cache_add(unsigned netid, const void* query, int querylen, const void* answer,
- int answerlen);
- /* Notify the cache a request failed */
- void _resolv_cache_query_failed(unsigned netid, const void* query, int querylen, uint32_t flags);
- // Sets name servers for a given network.
- int resolv_set_nameservers_for_net(unsigned netid, const char** servers, int numservers,
- const char* domains, const res_params* params);
- // Creates the cache associated with the given network.
- int resolv_create_cache_for_net(unsigned netid);
- // Deletes the cache associated with the given network.
- void resolv_delete_cache_for_net(unsigned netid);
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