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79 lines
2.2 KiB
C++
79 lines
2.2 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_RPCCHANNEL_H_
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#define SANDBOXED_API_RPCCHANNEL_H_
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#include <cstddef>
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#include "absl/status/status.h"
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#include "absl/status/statusor.h"
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#include "absl/synchronization/mutex.h"
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#include "sandboxed_api/call.h"
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#include "sandboxed_api/sandbox2/comms.h"
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#include "sandboxed_api/var_type.h"
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namespace sapi {
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// This class exposes functions which provide primitives operating over the
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// Comms channel.
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class RPCChannel {
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public:
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explicit RPCChannel(sandbox2::Comms* comms) : comms_(comms) {}
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// Calls a function.
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absl::Status Call(const FuncCall& call, uint32_t tag, FuncRet* ret,
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v::Type exp_type);
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// Allocates memory.
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absl::Status Allocate(size_t size, void** addr);
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// Reallocates memory.
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absl::Status Reallocate(void* old_addr, size_t size, void** new_addr);
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// Frees memory.
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absl::Status Free(void* addr);
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// Returns address of a symbol.
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absl::Status Symbol(const char* symname, void** addr);
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// Makes the remote part exit.
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absl::Status Exit();
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// Transfers fd to sandboxee.
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absl::Status SendFD(int local_fd, int* remote_fd);
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// Retrieves fd from sandboxee.
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absl::Status RecvFD(int remote_fd, int* local_fd);
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// Closes fd in sandboxee.
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absl::Status Close(int remote_fd);
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// Returns length of a null-terminated c-style string (invokes strlen).
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absl::StatusOr<size_t> Strlen(void* str);
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sandbox2::Comms* comms() const { return comms_; }
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private:
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// Receives the result after a call.
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absl::StatusOr<FuncRet> Return(v::Type exp_type);
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sandbox2::Comms* comms_; // Owned by sandbox2;
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absl::Mutex mutex_;
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};
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} // namespace sapi
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#endif // SANDBOXED_API_RPCCHANNEL_H_
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