mirror of
https://github.com/google/sandboxed-api.git
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177b969e8c
PiperOrigin-RevId: 238996664 Change-Id: I9646527e2be68ee0b6b371572b7aafe967102e57 Signed-off-by: Christian Blichmann <cblichmann@google.com>
96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
// Copyright 2019 Google LLC. All Rights Reserved.
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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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// Provides a class to marshall protobufs in and out of the sandbox
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#ifndef SANDBOXED_API_VAR_PROTO_H_
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#define SANDBOXED_API_VAR_PROTO_H_
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#include <cinttypes>
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#include "sandboxed_api/proto_helper.h"
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#include "sandboxed_api/var_lenval.h"
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#include "sandboxed_api/var_pointable.h"
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#include "sandboxed_api/var_ptr.h"
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namespace sapi {
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namespace v {
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template <typename T>
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class Proto : public Pointable, public Var {
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public:
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explicit Proto(const T& proto) : wrapped_var_(SerializeProto(proto)) {}
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size_t GetSize() const final { return wrapped_var_.GetSize(); }
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Type GetType() const final { return Type::kProto; }
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std::string GetTypeString() const final { return "Protobuf"; }
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std::string ToString() const final { return "Protobuf"; }
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Ptr* CreatePtr(Pointable::SyncType type) override {
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return new Ptr(this, type);
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}
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void* GetRemote() const override { return wrapped_var_.GetRemote(); }
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void* GetLocal() const override { return wrapped_var_.GetLocal(); }
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// Returns a copy of the stored protobuf object.
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std::unique_ptr<T> GetProtoCopy() const {
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auto res = absl::make_unique<T>();
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if (!res ||
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!DeserializeProto(res.get(),
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reinterpret_cast<const char*>(wrapped_var_.GetData()),
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wrapped_var_.GetDataSize())) {
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res.reset();
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}
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return res;
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}
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void SetRemote(void* remote) override {
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// We do not support that much indirection (pointer to a pointer to a
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// protobuf) as it is unlikely that this is wanted behavior. If you expect
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// this to work, please get in touch with us.
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LOG(FATAL) << "SetRemote not supported on protobufs.";
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}
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protected:
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// Forward a couple of function calls to the actual var.
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sapi::Status Allocate(RPCChannel* rpc_channel, bool automatic_free) override {
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return wrapped_var_.Allocate(rpc_channel, automatic_free);
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}
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sapi::Status Free(RPCChannel* rpc_channel) override {
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return sapi::OkStatus();
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}
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sapi::Status TransferToSandboxee(RPCChannel* rpc_channel,
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pid_t pid) override {
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return wrapped_var_.TransferToSandboxee(rpc_channel, pid);
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}
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sapi::Status TransferFromSandboxee(RPCChannel* rpc_channel,
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pid_t pid) override {
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return wrapped_var_.TransferFromSandboxee(rpc_channel, pid);
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}
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private:
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// The management of reading/writing the data to the sandboxee is handled by
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// the LenVal class.
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LenVal wrapped_var_;
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};
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} // namespace v
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} // namespace sapi
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#endif // SANDBOXED_API_VAR_PROTO_H_
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