85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
// Copyright 2019 Google LLC
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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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// https://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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#ifndef SANDBOXED_API_VAR_LENVAL_H_
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#define SANDBOXED_API_VAR_LENVAL_H_
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <cstring>
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#include <memory>
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#include <string>
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#include <vector>
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#include "absl/base/macros.h"
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#include "absl/status/status.h"
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#include "sandboxed_api/lenval_core.h"
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#include "sandboxed_api/var_abstract.h"
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#include "sandboxed_api/var_array.h"
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#include "sandboxed_api/var_ptr.h"
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#include "sandboxed_api/var_struct.h"
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namespace sapi::v {
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template <class T>
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class Proto;
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// Length + value container. Represents a pointer to a LenValStruct inside the
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// sandboxee which allows the bidirectional synchronization data structures with
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// changing lengths (e.g. protobuf structures). You probably want to directly
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// use protobufs as they are easier to handle.
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class LenVal : public Var {
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public:
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explicit LenVal(const char* data, uint64_t size)
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: array_(const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(data)),
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size),
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struct_(size, nullptr) {}
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explicit LenVal(const std::vector<uint8_t>& data)
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: array_(data.size()), struct_(data.size(), nullptr) {
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memcpy(array_.GetData(), data.data(), data.size());
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}
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explicit LenVal(size_t size) : array_(size), struct_(size, nullptr) {}
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Type GetType() const final { return Type::kLenVal; }
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std::string GetTypeString() const final { return "LengthValue"; }
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std::string ToString() const final { return "LenVal"; }
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absl::Status ResizeData(RPCChannel* rpc_channel, size_t size);
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size_t GetDataSize() const { return struct_.data().size; }
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uint8_t* GetData() const { return array_.GetData(); }
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void* GetRemote() const final { return struct_.GetRemote(); }
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protected:
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size_t GetSize() const final { return 0; }
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absl::Status Allocate(RPCChannel* rpc_channel, bool automatic_free) override;
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absl::Status Free(RPCChannel* rpc_channel) override;
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absl::Status TransferToSandboxee(RPCChannel* rpc_channel, pid_t pid) override;
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absl::Status TransferFromSandboxee(RPCChannel* rpc_channel,
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pid_t pid) override;
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Array<uint8_t> array_;
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Struct<LenValStruct> struct_;
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template <class T>
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friend class Proto;
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};
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} // namespace sapi::v
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#endif // SANDBOXED_API_VAR_LENVAL_H_
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