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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef TESTING_LIBFUZZER_FUZZERS_MACH_MACH_MESSAGE_CONVERTER_H_
#define TESTING_LIBFUZZER_FUZZERS_MACH_MACH_MESSAGE_CONVERTER_H_
#include <mach/mach.h>
#include <stdint.h>
#include <memory>
#include <vector>
#include "base/apple/scoped_mach_port.h"
#include "base/memory/raw_ptr.h"
#include "testing/libfuzzer/fuzzers/mach/mach_message.pb.h"
namespace mach_fuzzer {
// Container for a Mach port right that will be sent in a message.
struct SendablePort {
mach_port_t name = MACH_PORT_NULL;
mach_msg_type_name_t disposition = 0;
MachPortType proto_type = static_cast<MachPortType>(-1);
base::apple::ScopedMachSendRight send_right;
base::apple::ScopedMachReceiveRight receive_right;
};
// Holds the buffer allocation and port references for a message to be sent.
struct SendableMessage {
// The message buffer.
std::unique_ptr<uint8_t[]> buffer;
// The |ports| are also encoded into the body of the message, but they are
// accessible here to allow for further manipulation.
std::vector<SendablePort> ports;
// Pointer to the header of the message stored in |buffer|.
raw_ptr<mach_msg_header_t> header = nullptr;
};
// Converts the given protobuf message into a live Mach message, including port
// rights.
SendableMessage ConvertProtoToMachMessage(const MachMessage& proto);
// Takes the protobuf |proto|, converts it to a Mach message using
// ConvertProtoToMachMessage(), and then sends it via |local_port|. The port
// named by |local_port| must have a send right, which will be copied.
struct SendResult {
// The return value from mach_msg_send().
kern_return_t kr;
// The message that was sent, including its descriptors. This allows callers
// to control the lifetimes of any Mach rights after the message has been
// sent.
SendableMessage message;
};
SendResult SendMessage(mach_port_t local_port, const MachMessage& proto);
} // namespace mach_fuzzer
#endif // TESTING_LIBFUZZER_FUZZERS_MACH_MACH_MESSAGE_CONVERTER_H_
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