97 lines
3.6 KiB
C++
97 lines
3.6 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <android-base/logging.h>
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#include <android-base/unique_fd.h>
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#include <android/binder_libbinder.h>
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#include <binder/RpcServer.h>
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#include <binder/RpcSession.h>
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#include <linux/vm_sockets.h>
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using android::OK;
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using android::RpcServer;
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using android::RpcSession;
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using android::status_t;
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using android::statusToString;
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using android::base::unique_fd;
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extern "C" {
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bool RunRpcServerWithFactory(AIBinder* (*factory)(unsigned int cid, void* context),
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void* factoryContext, unsigned int port) {
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auto server = RpcServer::make();
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if (status_t status = server->setupVsockServer(port); status != OK) {
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LOG(ERROR) << "Failed to set up vsock server with port " << port
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<< " error: " << statusToString(status).c_str();
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return false;
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}
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server->setPerSessionRootObject([=](const sockaddr* addr, socklen_t addrlen) {
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LOG_ALWAYS_FATAL_IF(addr->sa_family != AF_VSOCK, "address is not a vsock");
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LOG_ALWAYS_FATAL_IF(addrlen < sizeof(sockaddr_vm), "sockaddr is truncated");
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const sockaddr_vm* vaddr = reinterpret_cast<const sockaddr_vm*>(addr);
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return AIBinder_toPlatformBinder(factory(vaddr->svm_cid, factoryContext));
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});
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server->join();
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// Shutdown any open sessions since server failed.
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(void)server->shutdown();
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return true;
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}
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bool RunRpcServerCallback(AIBinder* service, unsigned int port, void (*readyCallback)(void* param),
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void* param) {
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auto server = RpcServer::make();
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if (status_t status = server->setupVsockServer(port); status != OK) {
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LOG(ERROR) << "Failed to set up vsock server with port " << port
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<< " error: " << statusToString(status).c_str();
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return false;
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}
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server->setRootObject(AIBinder_toPlatformBinder(service));
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if (readyCallback) readyCallback(param);
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server->join();
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// Shutdown any open sessions since server failed.
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(void)server->shutdown();
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return true;
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}
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bool RunRpcServer(AIBinder* service, unsigned int port) {
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return RunRpcServerCallback(service, port, nullptr, nullptr);
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}
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AIBinder* RpcClient(unsigned int cid, unsigned int port) {
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auto session = RpcSession::make();
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if (status_t status = session->setupVsockClient(cid, port); status != OK) {
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LOG(ERROR) << "Failed to set up vsock client with CID " << cid << " and port " << port
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<< " error: " << statusToString(status).c_str();
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return nullptr;
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}
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return AIBinder_fromPlatformBinder(session->getRootObject());
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}
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AIBinder* RpcPreconnectedClient(int (*requestFd)(void* param), void* param) {
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auto session = RpcSession::make();
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auto request = [=] { return unique_fd{requestFd(param)}; };
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if (status_t status = session->setupPreconnectedClient(unique_fd{}, request); status != OK) {
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LOG(ERROR) << "Failed to set up vsock client. error: " << statusToString(status).c_str();
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return nullptr;
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}
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return AIBinder_fromPlatformBinder(session->getRootObject());
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}
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}
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