| /* |
| * Copyright (C) 2021 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <binder_rpc_unstable.hpp> |
| |
| #include <android-base/logging.h> |
| #include <android-base/unique_fd.h> |
| #include <android/binder_libbinder.h> |
| #include <binder/RpcServer.h> |
| #include <binder/RpcSession.h> |
| #include <cutils/sockets.h> |
| #include <linux/vm_sockets.h> |
| |
| using android::OK; |
| using android::RpcServer; |
| using android::RpcSession; |
| using android::sp; |
| using android::status_t; |
| using android::statusToString; |
| using android::base::unique_fd; |
| |
| // Opaque handle for RpcServer. |
| struct ARpcServer {}; |
| |
| static sp<RpcServer> toRpcServer(ARpcServer* handle) { |
| auto ref = reinterpret_cast<RpcServer*>(handle); |
| return sp<RpcServer>::fromExisting(ref); |
| } |
| |
| static ARpcServer* createRpcServerHandle(sp<RpcServer>& server) { |
| auto ref = server.get(); |
| ref->incStrong(ref); |
| return reinterpret_cast<ARpcServer*>(ref); |
| } |
| |
| static void freeRpcServerHandle(ARpcServer* handle) { |
| auto ref = reinterpret_cast<RpcServer*>(handle); |
| ref->decStrong(ref); |
| } |
| |
| extern "C" { |
| |
| bool RunVsockRpcServerWithFactory(AIBinder* (*factory)(unsigned int cid, void* context), |
| void* factoryContext, unsigned int port) { |
| auto server = RpcServer::make(); |
| if (status_t status = server->setupVsockServer(port); status != OK) { |
| LOG(ERROR) << "Failed to set up vsock server with port " << port |
| << " error: " << statusToString(status).c_str(); |
| return false; |
| } |
| server->setPerSessionRootObject([=](const void* addr, size_t addrlen) { |
| LOG_ALWAYS_FATAL_IF(addrlen < sizeof(sockaddr_vm), "sockaddr is truncated"); |
| const sockaddr_vm* vaddr = reinterpret_cast<const sockaddr_vm*>(addr); |
| LOG_ALWAYS_FATAL_IF(vaddr->svm_family != AF_VSOCK, "address is not a vsock"); |
| return AIBinder_toPlatformBinder(factory(vaddr->svm_cid, factoryContext)); |
| }); |
| |
| server->join(); |
| |
| // Shutdown any open sessions since server failed. |
| (void)server->shutdown(); |
| return true; |
| } |
| |
| ARpcServer* ARpcServer_newVsock(AIBinder* service, unsigned int port) { |
| auto server = RpcServer::make(); |
| if (status_t status = server->setupVsockServer(port); status != OK) { |
| LOG(ERROR) << "Failed to set up vsock server with port " << port |
| << " error: " << statusToString(status).c_str(); |
| return nullptr; |
| } |
| server->setRootObject(AIBinder_toPlatformBinder(service)); |
| return createRpcServerHandle(server); |
| } |
| |
| ARpcServer* ARpcServer_newInitUnixDomain(AIBinder* service, const char* name) { |
| auto server = RpcServer::make(); |
| auto fd = unique_fd(android_get_control_socket(name)); |
| if (!fd.ok()) { |
| LOG(ERROR) << "Failed to get fd for the socket:" << name; |
| return nullptr; |
| } |
| if (status_t status = server->setupRawSocketServer(std::move(fd)); status != OK) { |
| LOG(ERROR) << "Failed to set up Unix Domain RPC server with name " << name |
| << " error: " << statusToString(status).c_str(); |
| return nullptr; |
| } |
| server->setRootObject(AIBinder_toPlatformBinder(service)); |
| return createRpcServerHandle(server); |
| } |
| |
| void ARpcServer_start(ARpcServer* handle) { |
| toRpcServer(handle)->start(); |
| } |
| |
| void ARpcServer_join(ARpcServer* handle) { |
| toRpcServer(handle)->join(); |
| } |
| |
| void ARpcServer_shutdown(ARpcServer* handle) { |
| toRpcServer(handle)->shutdown(); |
| } |
| |
| void ARpcServer_free(ARpcServer* handle) { |
| freeRpcServerHandle(handle); |
| } |
| |
| AIBinder* VsockRpcClient(unsigned int cid, unsigned int port) { |
| auto session = RpcSession::make(); |
| if (status_t status = session->setupVsockClient(cid, port); status != OK) { |
| LOG(ERROR) << "Failed to set up vsock client with CID " << cid << " and port " << port |
| << " error: " << statusToString(status).c_str(); |
| return nullptr; |
| } |
| return AIBinder_fromPlatformBinder(session->getRootObject()); |
| } |
| |
| AIBinder* UnixDomainRpcClient(const char* name) { |
| std::string pathname(name); |
| pathname = ANDROID_SOCKET_DIR "/" + pathname; |
| auto session = RpcSession::make(); |
| if (status_t status = session->setupUnixDomainClient(pathname.c_str()); status != OK) { |
| LOG(ERROR) << "Failed to set up Unix Domain RPC client with path: " << pathname |
| << " error: " << statusToString(status).c_str(); |
| return nullptr; |
| } |
| return AIBinder_fromPlatformBinder(session->getRootObject()); |
| } |
| |
| AIBinder* RpcPreconnectedClient(int (*requestFd)(void* param), void* param) { |
| auto session = RpcSession::make(); |
| auto request = [=] { return unique_fd{requestFd(param)}; }; |
| if (status_t status = session->setupPreconnectedClient(unique_fd{}, request); status != OK) { |
| LOG(ERROR) << "Failed to set up vsock client. error: " << statusToString(status).c_str(); |
| return nullptr; |
| } |
| return AIBinder_fromPlatformBinder(session->getRootObject()); |
| } |
| } |