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/*
* Copyright (C) 2020 Luciano Iam <lucianito@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef websockets_server_h
#define websockets_server_h
#include <boost/unordered_map.hpp>
#include <libwebsockets.h>
#if LWS_LIBRARY_VERSION_MAJOR < 3
// <libwebsockets.h> includes <uv.h> which in turn includes
// /usr/include/asm-generic/param.h on linux which defines HZ
// and conflicts with libs/ardour/ardour/parameter_descriptor.h
#undef HZ
#else
// also libwebsockets >=3 already includes integration with the glib event loop
// but ubuntu default repositories are stuck at version 2, hold until requiring
// version 3 in order to keep things simpler for the end user
#endif
#include "component.h"
#include "client.h"
#include "state.h"
#include "message.h"
#define WEBSOCKET_LISTEN_PORT 9000
struct LwsPollFdGlibSource {
struct lws_pollfd lws_pfd;
Glib::RefPtr<Glib::IOChannel> g_channel;
Glib::RefPtr<Glib::IOSource> rg_iosrc;
Glib::RefPtr<Glib::IOSource> wg_iosrc;
};
class WebsocketsServer : public SurfaceComponent
{
public:
WebsocketsServer (ArdourSurface::ArdourWebsockets&);
virtual ~WebsocketsServer () {};
int start ();
int stop ();
void update_client (Client, const NodeState&, bool);
void update_all_clients (const NodeState&, bool);
private:
struct lws_protocols _lws_proto[2];
struct lws_context_creation_info _lws_info;
struct lws_context *_lws_context;
Glib::RefPtr<Glib::IOChannel> _channel;
typedef boost::unordered_map<lws_sockfd_type, LwsPollFdGlibSource> LwsPollFdGlibSourceMap;
LwsPollFdGlibSourceMap _fd_ctx;
typedef boost::unordered_map<Client, ClientContext> ClientContextMap;
ClientContextMap _client_ctx;
void add_poll_fd (struct lws_pollargs*);
void mod_poll_fd (struct lws_pollargs*);
void del_poll_fd (struct lws_pollargs*);
void add_client (Client);
void del_client (Client);
void recv_client (Client, void *buf, size_t len);
void write_client (Client);
bool io_handler (Glib::IOCondition, lws_sockfd_type);
Glib::IOCondition events_to_ioc (int);
int ioc_to_events (Glib::IOCondition);
static int lws_callback(struct lws*, enum lws_callback_reasons, void *, void *, size_t);
};
#endif // websockets_server_h
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