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TcpListener.cpp
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170 lines (125 loc) · 4.06 KB
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <SFNUL/TcpListener.hpp>
#include <SFNUL/ConfigInternal.hpp>
#include <SFNUL/Utility.hpp>
#include <SFNUL/Endpoint.hpp>
#include <SFNUL/IpAddressImpl.hpp>
#include <SFNUL/MakeUnique.hpp>
#include <asio/ip/tcp.hpp>
#include <asio/strand.hpp>
#include <functional>
namespace {
struct TcpListenerMaker : public sfn::TcpListener {};
}
namespace sfn {
class TcpListener::TcpListenerImpl {
public:
TcpListenerImpl( TcpListener* owner ) :
tcp_listener{ owner },
asio_acceptor{ *static_cast<asio::io_context*>( owner->GetIOService() ) }
{
}
void AcceptHandler( const asio::error_code& error, std::shared_ptr<asio::ip::tcp::socket> socket ) {
auto lock = tcp_listener->AcquireLock();
if( !socket ) {
}
else if( error == asio::error::operation_aborted ) {
}
else if( ( error == asio::error::connection_aborted ) || ( error == asio::error::connection_reset ) ) {
socket.reset();
}
else if( error ) {
ErrorMessage() << "Async Accept Error: " << error.message() << "\n";
return;
}
if( socket ) {
new_connections.emplace_back( std::move( *socket ) );
}
if( !listening ) {
return;
}
auto new_socket = std::make_shared<asio::ip::tcp::socket>( *static_cast<asio::io_context*>( tcp_listener->GetIOService() ) );
asio_acceptor.async_accept( *new_socket,
static_cast<asio::io_context::strand*>( tcp_listener->GetStrand() )->wrap(
std::bind(
[]( std::weak_ptr<TcpListener> listener, const asio::error_code& handler_error, std::shared_ptr<asio::ip::tcp::socket> handler_socket ) {
if( listener.expired() ) {
return;
}
listener.lock()->m_impl->AcceptHandler( handler_error, handler_socket );
},
std::weak_ptr<TcpListener>( tcp_listener->shared_from_this() ), std::placeholders::_1, new_socket
)
)
);
}
TcpListener* tcp_listener;
asio::ip::tcp::acceptor asio_acceptor;
std::deque<asio::ip::tcp::socket> new_connections;
bool listening = false;
};
TcpListener::TcpListener() :
m_impl{ make_unique<TcpListenerImpl>( this ) }
{
}
TcpListener::~TcpListener() {
}
TcpListener::Ptr TcpListener::Create() {
return std::make_shared<TcpListenerMaker>();
}
void TcpListener::Listen( const Endpoint& endpoint, int backlog ) {
auto lock = AcquireLock();
asio::error_code error;
auto asio_endpoint = asio::ip::basic_endpoint<asio::ip::tcp>{ endpoint.GetAddress().m_impl->address, endpoint.GetPort() };
m_impl->asio_acceptor.open( asio_endpoint.protocol(), error );
if( error ) {
ErrorMessage() << "Listen() Error: " << error.message() << "\n";
return;
}
asio::socket_base::enable_connection_aborted option( true );
m_impl->asio_acceptor.set_option( option, error );
if( error ) {
ErrorMessage() << "Listen() Error: " << error.message() << "\n";
return;
}
m_impl->asio_acceptor.bind( asio_endpoint, error );
if( error ) {
ErrorMessage() << "Listen() Error: " << error.message() << "\n";
return;
}
m_impl->asio_acceptor.listen( backlog, error );
if( error ) {
ErrorMessage() << "Listen() Error: " << error.message() << "\n";
return;
}
m_impl->listening = true;
m_impl->AcceptHandler( asio::error_code{}, nullptr );
}
void TcpListener::Close() {
auto lock = AcquireLock();
asio::error_code error;
m_impl->asio_acceptor.close( error );
if( error ) {
ErrorMessage() << "Close() Error: " << error.message() << "\n";
return;
}
m_impl->listening = false;
}
Endpoint TcpListener::GetEndpoint() const {
auto lock = AcquireLock();
IpAddress address;
address.m_impl->address = m_impl->asio_acceptor.local_endpoint().address();
return { address, m_impl->asio_acceptor.local_endpoint().port() };
}
bool TcpListener::HasPendingConnections() const {
return !m_impl->new_connections.empty();
}
void* TcpListener::GetFirstPendingConnection() {
return &( m_impl->new_connections.front() );
}
void TcpListener::RemoveFirstPendingConnection() {
m_impl->new_connections.pop_front();
}
}