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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <Kernel/FileSystem/FileDescription.h>
#include <Kernel/Net/LocalSocket.h>
#include <Kernel/Process.h>
namespace Kernel {
int Process::sys$sendfd(int sockfd, int fd)
{
REQUIRE_PROMISE(sendfd);
auto socket_description = file_description(sockfd);
if (!socket_description)
return -EBADF;
if (!socket_description->is_socket())
return -ENOTSOCK;
auto& socket = *socket_description->socket();
if (!socket.is_local())
return -EAFNOSUPPORT;
if (!socket.is_connected())
return -ENOTCONN;
auto passing_descriptor = file_description(fd);
if (!passing_descriptor)
return -EBADF;
auto& local_socket = static_cast<LocalSocket&>(socket);
return local_socket.sendfd(*socket_description, *passing_descriptor);
}
int Process::sys$recvfd(int sockfd)
{
REQUIRE_PROMISE(recvfd);
auto socket_description = file_description(sockfd);
if (!socket_description)
return -EBADF;
if (!socket_description->is_socket())
return -ENOTSOCK;
auto& socket = *socket_description->socket();
if (!socket.is_local())
return -EAFNOSUPPORT;
int new_fd = alloc_fd();
if (new_fd < 0)
return new_fd;
auto& local_socket = static_cast<LocalSocket&>(socket);
auto received_descriptor_or_error = local_socket.recvfd(*socket_description);
if (received_descriptor_or_error.is_error())
return received_descriptor_or_error.error();
m_fds[new_fd].set(*received_descriptor_or_error.value(), 0);
return new_fd;
}
}
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