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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/IPv4Address.h>
#include <AK/Types.h>
#include <LibCore/Notifier.h>
#include <LibCore/TCPServer.h>
#include <LibCore/TCPSocket.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/socket.h>
#include <unistd.h>
#ifndef SOCK_NONBLOCK
# include <sys/ioctl.h>
#endif
namespace Core {
TCPServer::TCPServer(Object* parent)
: Object(parent)
{
#ifdef SOCK_NONBLOCK
m_fd = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0);
#else
m_fd = socket(AF_INET, SOCK_STREAM, 0);
int option = 1;
ioctl(m_fd, FIONBIO, &option);
fcntl(m_fd, F_SETFD, FD_CLOEXEC);
#endif
VERIFY(m_fd >= 0);
}
TCPServer::~TCPServer()
{
::close(m_fd);
}
bool TCPServer::listen(const IPv4Address& address, u16 port)
{
if (m_listening)
return false;
auto socket_address = SocketAddress(address, port);
auto in = socket_address.to_sockaddr_in();
if (::bind(m_fd, (const sockaddr*)&in, sizeof(in)) < 0) {
perror("TCPServer::listen: bind");
return false;
}
if (::listen(m_fd, 5) < 0) {
perror("TCPServer::listen: listen");
return false;
}
m_listening = true;
m_notifier = Notifier::construct(m_fd, Notifier::Event::Read, this);
m_notifier->on_ready_to_read = [this] {
if (on_ready_to_accept)
on_ready_to_accept();
};
return true;
}
void TCPServer::set_blocking(bool blocking)
{
int flags = fcntl(m_fd, F_GETFL, 0);
VERIFY(flags >= 0);
if (blocking)
flags = fcntl(m_fd, F_SETFL, flags & ~O_NONBLOCK);
else
flags = fcntl(m_fd, F_SETFL, flags | O_NONBLOCK);
VERIFY(flags == 0);
}
RefPtr<TCPSocket> TCPServer::accept()
{
VERIFY(m_listening);
sockaddr_in in;
socklen_t in_size = sizeof(in);
#ifndef AK_OS_MACOS
int accepted_fd = ::accept4(m_fd, (sockaddr*)&in, &in_size, SOCK_NONBLOCK | SOCK_CLOEXEC);
#else
int accepted_fd = ::accept(m_fd, (sockaddr*)&in, &in_size);
#endif
if (accepted_fd < 0) {
perror("accept");
return nullptr;
}
#ifdef AK_OS_MACOS
int option = 1;
(void)ioctl(m_fd, FIONBIO, &option);
(void)fcntl(accepted_fd, F_SETFD, FD_CLOEXEC);
#endif
return TCPSocket::construct(accepted_fd);
}
Optional<IPv4Address> TCPServer::local_address() const
{
if (m_fd == -1)
return {};
sockaddr_in address;
socklen_t len = sizeof(address);
if (getsockname(m_fd, (sockaddr*)&address, &len) != 0)
return {};
return IPv4Address(address.sin_addr.s_addr);
}
Optional<u16> TCPServer::local_port() const
{
if (m_fd == -1)
return {};
sockaddr_in address;
socklen_t len = sizeof(address);
if (getsockname(m_fd, (sockaddr*)&address, &len) != 0)
return {};
return ntohs(address.sin_port);
}
}
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