1 /* 2 * Copyright (c) 2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef NETSYS_DNS_PARAM_CACHE_H 17 #define NETSYS_DNS_PARAM_CACHE_H 18 19 #include <iostream> 20 #include <map> 21 22 #include "dns_resolv_config.h" 23 #include "netnative_log_wrapper.h" 24 25 #if DNS_CONFIG_DEBUG 26 #ifdef DNS_CONFIG_PRINT 27 #undef DNS_CONFIG_PRINT 28 #endif 29 #define DNS_CONFIG_PRINT(fmt, ...) NETNATIVE_LOGI("DNS" fmt, ##__VA_ARGS__) 30 #else 31 #define DNS_CONFIG_PRINT(fmt, ...) 32 #endif 33 34 namespace OHOS::nmd { 35 class DnsParamCache { 36 public: 37 ~DnsParamCache() = default; 38 39 static DnsParamCache &GetInstance(); 40 41 // for net_conn_service 42 int32_t SetResolverConfig(uint16_t netId, uint16_t baseTimeoutMsec, uint8_t retryCount, 43 const std::vector<std::string> &servers, const std::vector<std::string> &domains); 44 45 int32_t CreateCacheForNet(uint16_t netId); 46 47 void SetDefaultNetwork(uint16_t netId); 48 49 // for client 50 void SetDnsCache(uint16_t netId, const std::string &hostName, const AddrInfo &addrInfo); 51 52 void SetCacheDelayed(uint16_t netId, const std::string &hostName); 53 54 std::vector<AddrInfo> GetDnsCache(uint16_t netId, const std::string &hostName); 55 56 int32_t GetResolverConfig(uint16_t netId, std::vector<std::string> &servers, std::vector<std::string> &domains, 57 uint16_t &baseTimeoutMsec, uint8_t &retryCount); 58 59 int32_t GetDefaultNetwork() const; 60 61 void GetDumpInfo(std::string &info); 62 63 int32_t DestroyNetworkCache(uint16_t netId); 64 65 bool IsIpv6Enable(uint16_t netId); 66 67 void EnableIpv6(uint16_t netId); 68 69 private: 70 DnsParamCache(); 71 72 std::mutex cacheMutex_; 73 74 std::atomic_uint defaultNetId_; 75 76 std::map<uint16_t, DnsResolvConfig> serverConfigMap_; 77 78 static std::vector<std::string> SelectNameservers(const std::vector<std::string> &servers); 79 }; 80 } // namespace OHOS::nmd 81 #endif // NETSYS_DNS_PARAM_CACHE_H 82