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128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Sam Atkins <atkinssj@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 <AK/IPv4Address.h>
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#include <AK/Types.h>
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#include <LibCore/Notifier.h>
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#include <LibCore/Socket.h>
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#include <LibCore/System.h>
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#include <LibCore/TCPServer.h>
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namespace Core {
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ErrorOr<NonnullRefPtr<TCPServer>> TCPServer::try_create(EventReceiver* parent)
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{
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#ifdef SOCK_NONBLOCK
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int fd = TRY(Core::System::socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0));
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#else
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int fd = TRY(Core::System::socket(AF_INET, SOCK_STREAM, 0));
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int option = 1;
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TRY(Core::System::ioctl(fd, FIONBIO, &option));
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TRY(Core::System::fcntl(fd, F_SETFD, FD_CLOEXEC));
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#endif
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return adopt_nonnull_ref_or_enomem(new (nothrow) TCPServer(fd, parent));
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}
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TCPServer::TCPServer(int fd, EventReceiver* parent)
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: EventReceiver(parent)
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, m_fd(fd)
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{
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VERIFY(m_fd >= 0);
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}
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TCPServer::~TCPServer()
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{
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MUST(Core::System::close(m_fd));
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}
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ErrorOr<void> TCPServer::listen(IPv4Address const& address, u16 port, AllowAddressReuse allow_address_reuse)
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{
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if (m_listening)
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return Error::from_errno(EADDRINUSE);
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auto socket_address = SocketAddress(address, port);
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auto in = socket_address.to_sockaddr_in();
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if (allow_address_reuse == AllowAddressReuse::Yes) {
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int option = 1;
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TRY(Core::System::setsockopt(m_fd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option)));
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}
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TRY(Core::System::bind(m_fd, (sockaddr const*)&in, sizeof(in)));
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TRY(Core::System::listen(m_fd, 5));
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m_listening = true;
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m_notifier = Notifier::construct(m_fd, Notifier::Type::Read, this);
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m_notifier->on_activation = [this] {
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if (on_ready_to_accept)
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on_ready_to_accept();
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};
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return {};
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}
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ErrorOr<void> TCPServer::set_blocking(bool blocking)
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{
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int flags = TRY(Core::System::fcntl(m_fd, F_GETFL, 0));
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if (blocking)
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TRY(Core::System::fcntl(m_fd, F_SETFL, flags & ~O_NONBLOCK));
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else
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TRY(Core::System::fcntl(m_fd, F_SETFL, flags | O_NONBLOCK));
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return {};
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}
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ErrorOr<NonnullOwnPtr<TCPSocket>> TCPServer::accept()
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{
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VERIFY(m_listening);
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sockaddr_in in;
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socklen_t in_size = sizeof(in);
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#ifndef AK_OS_MACOS
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int accepted_fd = TRY(Core::System::accept4(m_fd, (sockaddr*)&in, &in_size, SOCK_NONBLOCK | SOCK_CLOEXEC));
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#else
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int accepted_fd = TRY(Core::System::accept(m_fd, (sockaddr*)&in, &in_size));
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#endif
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auto socket = TRY(TCPSocket::adopt_fd(accepted_fd));
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#ifdef AK_OS_MACOS
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// FIXME: Ideally, we should let the caller decide whether it wants the
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// socket to be nonblocking or not, but there are currently places
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// which depend on this.
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TRY(socket->set_blocking(false));
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TRY(socket->set_close_on_exec(true));
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#endif
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return socket;
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}
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Optional<IPv4Address> TCPServer::local_address() const
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{
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if (m_fd == -1)
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return {};
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sockaddr_in address;
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socklen_t len = sizeof(address);
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if (getsockname(m_fd, (sockaddr*)&address, &len) != 0)
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return {};
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return IPv4Address(address.sin_addr.s_addr);
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}
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Optional<u16> TCPServer::local_port() const
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{
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if (m_fd == -1)
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return {};
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sockaddr_in address;
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socklen_t len = sizeof(address);
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if (getsockname(m_fd, (sockaddr*)&address, &len) != 0)
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return {};
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return ntohs(address.sin_port);
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}
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}
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