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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 <AK/StringBuilder.h>
#include <Kernel/FileSystem/FileDescription.h>
#include <Kernel/Net/IPv4Socket.h>
#include <Kernel/Net/LocalSocket.h>
#include <Kernel/Net/Socket.h>
#include <Kernel/Process.h>
#include <Kernel/UnixTypes.h>
#include <LibC/errno_numbers.h>
//#define SOCKET_DEBUG
namespace Kernel {
KResultOr<NonnullRefPtr<Socket>> Socket::create(int domain, int type, int protocol)
{
switch (domain) {
case AF_LOCAL:
return LocalSocket::create(type & SOCK_TYPE_MASK);
case AF_INET:
return IPv4Socket::create(type & SOCK_TYPE_MASK, protocol);
default:
return KResult(-EAFNOSUPPORT);
}
}
Socket::Socket(int domain, int type, int protocol)
: m_domain(domain)
, m_type(type)
, m_protocol(protocol)
{
auto& process = *Process::current;
m_origin = { process.pid(), process.uid(), process.gid() };
}
Socket::~Socket()
{
}
void Socket::set_setup_state(SetupState new_setup_state)
{
#ifdef SOCKET_DEBUG
kprintf("%s(%u) Socket{%p} setup state moving from %s to %s\n", Process::current->name().characters(), Process::current->pid(), this, to_string(m_setup_state), to_string(new_setup_state));
#endif
m_setup_state = new_setup_state;
}
RefPtr<Socket> Socket::accept()
{
LOCKER(m_lock);
if (m_pending.is_empty())
return nullptr;
#ifdef SOCKET_DEBUG
kprintf("%s(%u) Socket{%p} de-queueing connection\n", Process::current->name().characters(), Process::current->pid(), this);
#endif
auto client = m_pending.take_first();
ASSERT(!client->is_connected());
auto& process = *Process::current;
client->m_acceptor = { process.pid(), process.uid(), process.gid() };
client->m_connected = true;
client->m_role = Role::Accepted;
return client;
}
KResult Socket::queue_connection_from(NonnullRefPtr<Socket> peer)
{
#ifdef SOCKET_DEBUG
kprintf("%s(%u) Socket{%p} queueing connection\n", Process::current->name().characters(), Process::current->pid(), this);
#endif
LOCKER(m_lock);
if (m_pending.size() >= m_backlog)
return KResult(-ECONNREFUSED);
m_pending.append(peer);
return KSuccess;
}
KResult Socket::setsockopt(int level, int option, const void* value, socklen_t value_size)
{
ASSERT(level == SOL_SOCKET);
switch (option) {
case SO_SNDTIMEO:
if (value_size != sizeof(timeval))
return KResult(-EINVAL);
m_send_timeout = *(const timeval*)value;
return KSuccess;
case SO_RCVTIMEO:
if (value_size != sizeof(timeval))
return KResult(-EINVAL);
m_receive_timeout = *(const timeval*)value;
return KSuccess;
default:
dbg() << "setsockopt(" << option << ") at SOL_SOCKET not implemented.";
return KResult(-ENOPROTOOPT);
}
}
KResult Socket::getsockopt(FileDescription&, int level, int option, void* value, socklen_t* value_size)
{
ASSERT(level == SOL_SOCKET);
switch (option) {
case SO_SNDTIMEO:
if (*value_size < sizeof(timeval))
return KResult(-EINVAL);
*(timeval*)value = m_send_timeout;
*value_size = sizeof(timeval);
return KSuccess;
case SO_RCVTIMEO:
if (*value_size < sizeof(timeval))
return KResult(-EINVAL);
*(timeval*)value = m_receive_timeout;
*value_size = sizeof(timeval);
return KSuccess;
case SO_ERROR:
if (*value_size < sizeof(int))
return KResult(-EINVAL);
dbg() << "getsockopt(SO_ERROR): FIXME!";
*(int*)value = 0;
*value_size = sizeof(int);
return KSuccess;
default:
dbg() << "getsockopt(" << option << ") at SOL_SOCKET not implemented.";
return KResult(-ENOPROTOOPT);
}
}
ssize_t Socket::read(FileDescription& description, u8* buffer, ssize_t size)
{
if (is_shut_down_for_reading())
return 0;
return recvfrom(description, buffer, size, 0, nullptr, 0);
}
ssize_t Socket::write(FileDescription& description, const u8* data, ssize_t size)
{
if (is_shut_down_for_writing())
return -EPIPE;
return sendto(description, data, size, 0, nullptr, 0);
}
KResult Socket::shutdown(int how)
{
if (type() == SOCK_STREAM && !is_connected())
return KResult(-ENOTCONN);
if (m_role == Role::Listener)
return KResult(-ENOTCONN);
if (!m_shut_down_for_writing && (how & SHUT_WR))
shut_down_for_writing();
if (!m_shut_down_for_reading && (how & SHUT_RD))
shut_down_for_reading();
m_shut_down_for_reading |= (how & SHUT_RD) != 0;
m_shut_down_for_writing |= (how & SHUT_WR) != 0;
return KSuccess;
}
}
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