1 // Copyright 2023 The Android Open Source Project 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 // Frontend client for netsimd. 16 17 #include "frontend/frontend_client_stub.h" 18 19 #include <chrono> 20 #include <memory> 21 22 #include "grpcpp/create_channel.h" 23 #include "grpcpp/security/credentials.h" 24 #include "netsim/frontend.grpc.pb.h" 25 #include "netsim/frontend.pb.h" 26 #include "util/os_utils.h" 27 28 namespace netsim { 29 namespace frontend { 30 namespace { 31 const std::chrono::duration kConnectionDeadline = std::chrono::seconds(1); 32 NewFrontendClient(uint16_t instance_num)33std::unique_ptr<frontend::FrontendService::Stub> NewFrontendClient( 34 uint16_t instance_num) { 35 auto port = netsim::osutils::GetServerAddress(instance_num); 36 if (!port.has_value()) { 37 return nullptr; 38 } 39 auto server = "localhost:" + port.value(); 40 std::shared_ptr<grpc::Channel> channel = 41 grpc::CreateChannel(server, grpc::InsecureChannelCredentials()); 42 43 auto deadline = std::chrono::system_clock::now() + kConnectionDeadline; 44 if (!channel->WaitForConnected(deadline)) { 45 return nullptr; 46 } 47 48 return frontend::FrontendService::NewStub(channel); 49 } 50 } // namespace 51 IsNetsimdAlive(uint16_t instance_num)52bool IsNetsimdAlive(uint16_t instance_num) { 53 return NewFrontendClient(instance_num) != nullptr; 54 } 55 56 } // namespace frontend 57 } // namespace netsim 58