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4d344e6cf7
Add VERIFY assertions to catch bugs where we accidentally try to send messages that exceed MAX_MESSAGE_PAYLOAD_SIZE or MAX_MESSAGE_FD_COUNT. These are programming errors and should crash immediately so we catch them during development, rather than silently sending invalid data.
54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
/*
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* Copyright (c) 2024, Tim Flynn <trflynn89@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibIPC/Decoder.h>
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#include <LibIPC/Limits.h>
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#include <LibIPC/Message.h>
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namespace IPC {
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MessageBuffer::MessageBuffer()
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{
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}
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ErrorOr<void> MessageBuffer::extend_data_capacity(size_t capacity)
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{
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TRY(m_data.try_ensure_capacity(m_data.size() + capacity));
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return {};
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}
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ErrorOr<void> MessageBuffer::append_data(u8 const* values, size_t count)
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{
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TRY(m_data.try_append(values, count));
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return {};
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}
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ErrorOr<void> MessageBuffer::append_file_descriptor(int fd)
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{
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auto auto_fd = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) AutoCloseFileDescriptor(fd)));
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TRY(m_fds.try_append(move(auto_fd)));
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return {};
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}
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ErrorOr<void> MessageBuffer::extend(MessageBuffer&& buffer)
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{
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TRY(m_data.try_extend(move(buffer.m_data)));
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TRY(m_fds.try_extend(move(buffer.m_fds)));
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return {};
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}
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ErrorOr<void> MessageBuffer::transfer_message(Transport& transport)
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{
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// These VERIFYs catch bugs where we try to send messages that exceed IPC limits.
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// If we hit these, we have a bug in our encoding code.
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VERIFY(m_data.size() <= MAX_MESSAGE_PAYLOAD_SIZE);
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VERIFY(m_fds.size() <= MAX_MESSAGE_FD_COUNT);
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transport.post_message(m_data, m_fds);
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return {};
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}
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}
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