1 // Copyright 2023 The gRPC Authors. 2 // 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 #ifndef GRPC_SRC_CORE_LIB_EVENT_ENGINE_POSIX_ENGINE_NATIVE_POSIX_DNS_RESOLVER_H 16 #define GRPC_SRC_CORE_LIB_EVENT_ENGINE_POSIX_ENGINE_NATIVE_POSIX_DNS_RESOLVER_H 17 18 #include <grpc/support/port_platform.h> 19 20 #include <memory> 21 22 #include "absl/strings/string_view.h" 23 #include "src/core/lib/iomgr/port.h" 24 25 #ifdef GRPC_POSIX_SOCKET_RESOLVE_ADDRESS 26 27 #include <grpc/event_engine/event_engine.h> 28 29 namespace grpc_event_engine { 30 namespace experimental { 31 32 // An asynchronous DNS resolver which uses the native platform's getaddrinfo 33 // API. Only supports A/AAAA records. 34 class NativePosixDNSResolver : public EventEngine::DNSResolver { 35 public: 36 explicit NativePosixDNSResolver(std::shared_ptr<EventEngine> event_engine); 37 38 void LookupHostname( 39 EventEngine::DNSResolver::LookupHostnameCallback on_resolved, 40 absl::string_view name, absl::string_view default_port) override; 41 42 void LookupSRV(EventEngine::DNSResolver::LookupSRVCallback on_resolved, 43 absl::string_view name) override; 44 45 void LookupTXT(EventEngine::DNSResolver::LookupTXTCallback on_resolved, 46 absl::string_view name) override; 47 48 private: 49 std::shared_ptr<EventEngine> event_engine_; 50 }; 51 52 } // namespace experimental 53 } // namespace grpc_event_engine 54 55 #endif // GRPC_POSIX_SOCKET_RESOLVE_ADDRESS 56 #endif // GRPC_SRC_CORE_LIB_EVENT_ENGINE_POSIX_ENGINE_NATIVE_POSIX_DNS_RESOLVER_H 57