127 lines
3.8 KiB
C++
127 lines
3.8 KiB
C++
/*
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* Copyright (C) 2020-2021 Luciano Iam <oss@lucianoiam.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _ardour_surface_websockets_server_h_
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#define _ardour_surface_websockets_server_h_
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#include <boost/unordered_map.hpp>
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#include <glibmm.h>
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#include <libwebsockets.h>
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#if LWS_LIBRARY_VERSION_MAJOR < 3
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// older <libwebsockets.h> includes <uv.h> which in turn includes
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// /usr/include/asm-generic/param.h on linux which defines HZ
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// and conflicts with libs/ardour/ardour/parameter_descriptor.h
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#undef HZ
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#endif
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#include "client.h"
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#include "component.h"
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#include "message.h"
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#include "state.h"
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#include "resources.h"
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// TO DO: make this configurable
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#define WEBSOCKET_LISTEN_PORT 3818
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namespace ArdourSurface {
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class WebsocketsServer : public SurfaceComponent
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{
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public:
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WebsocketsServer (ArdourSurface::ArdourWebsockets&);
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virtual ~WebsocketsServer (){};
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int start ();
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int stop ();
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void update_client (Client, const NodeState&, bool);
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void update_all_clients (const NodeState&, bool);
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private:
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#if LWS_LIBRARY_VERSION_MAJOR < 3
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struct lws_protocol_vhost_options _lws_vhost_opt;
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#endif
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struct lws_protocols _lws_proto[2];
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struct lws_http_mount _lws_mnt_root;
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struct lws_http_mount _lws_mnt_user;
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struct lws_context_creation_info _lws_info;
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struct lws_context* _lws_context;
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typedef boost::unordered_map<Client, ClientContext> ClientContextMap;
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ClientContextMap _client_ctx;
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ServerResources _resources;
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int add_client (Client);
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int del_client (Client);
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int recv_client (Client, void*, size_t);
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int write_client (Client);
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int send_availsurf_hdr (Client);
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int send_availsurf_body (Client);
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void request_write (Client);
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static int lws_callback (struct lws*, enum lws_callback_reasons, void*, void*, size_t);
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/* Glib event loop integration that requires LWS_WITH_EXTERNAL_POLL */
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struct LwsPollFdGlibSource {
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struct lws_pollfd lws_pfd;
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Glib::RefPtr<Glib::IOChannel> g_channel;
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Glib::RefPtr<Glib::IOSource> rg_iosrc;
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Glib::RefPtr<Glib::IOSource> wg_iosrc;
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};
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Glib::RefPtr<Glib::IOChannel> _channel;
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typedef boost::unordered_map<lws_sockfd_type, LwsPollFdGlibSource> LwsPollFdGlibSourceMap;
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LwsPollFdGlibSourceMap _fd_ctx;
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bool _fd_callbacks;
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bool fd_callbacks () { return _fd_callbacks; }
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int add_poll_fd (struct lws_pollargs*);
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int mod_poll_fd (struct lws_pollargs*);
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int del_poll_fd (struct lws_pollargs*);
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bool io_handler (Glib::IOCondition, lws_sockfd_type);
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Glib::IOCondition events_to_ioc (int);
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int ioc_to_events (Glib::IOCondition);
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/* Glib event loop integration that does NOT require LWS_WITH_EXTERNAL_POLL
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but needs a secondary thread for notifying the server when there is
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pending data for writing. Unfortunately libwesockets' own approach to
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Glib integration cannot be copied because it relies on file descriptors
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that are hidden by the 'lws' opaque type. See feedback.cc . */
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GSource* _g_source;
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static gboolean glib_idle_callback (void *);
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public:
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bool read_blocks_event_loop () { return _g_source != 0; }
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};
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} // namespace ArdourSurface
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#endif // _ardour_surface_websockets_server_h_
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