81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
#pragma once
|
|
|
|
#include <sys/socket.h>
|
|
|
|
#include <cstdint>
|
|
#include <vector>
|
|
|
|
#include "common/libs/fs/shared_fd.h"
|
|
#include "common/libs/utils/result.h"
|
|
|
|
namespace cuttlefish {
|
|
|
|
struct ControlMessage {
|
|
public:
|
|
static ControlMessage FromRaw(const cmsghdr*);
|
|
static Result<ControlMessage> FromFileDescriptors(
|
|
const std::vector<SharedFD>&);
|
|
static ControlMessage FromCredentials(const ucred&);
|
|
ControlMessage(const ControlMessage&) = delete;
|
|
ControlMessage(ControlMessage&&);
|
|
~ControlMessage();
|
|
ControlMessage& operator=(const ControlMessage&) = delete;
|
|
ControlMessage& operator=(ControlMessage&&);
|
|
|
|
const cmsghdr* Raw() const;
|
|
|
|
bool IsCredentials() const;
|
|
Result<ucred> AsCredentials() const;
|
|
|
|
bool IsFileDescriptors() const;
|
|
Result<std::vector<SharedFD>> AsSharedFDs() const;
|
|
|
|
private:
|
|
friend class UnixMessageSocket;
|
|
ControlMessage() = default;
|
|
cmsghdr* Raw();
|
|
|
|
std::vector<char> data_;
|
|
std::vector<int> fds_;
|
|
};
|
|
|
|
struct UnixSocketMessage {
|
|
std::vector<char> data;
|
|
std::vector<ControlMessage> control;
|
|
|
|
bool HasFileDescriptors();
|
|
Result<std::vector<SharedFD>> FileDescriptors();
|
|
bool HasCredentials();
|
|
Result<ucred> Credentials();
|
|
};
|
|
|
|
class UnixMessageSocket {
|
|
public:
|
|
UnixMessageSocket(SharedFD);
|
|
[[nodiscard]] Result<void> WriteMessage(const UnixSocketMessage&);
|
|
Result<UnixSocketMessage> ReadMessage();
|
|
|
|
[[nodiscard]] Result<void> EnableCredentials(bool);
|
|
|
|
private:
|
|
SharedFD socket_;
|
|
std::uint32_t max_message_size_;
|
|
};
|
|
|
|
} // namespace cuttlefish
|