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/**
* @file websocket_server.cpp
*
* @brief Settings daemon WebSocket server source.
*
* @author Ossama Othman @<ossama.othman@@intel.com@>
*
* @copyright @par
* Copyright 2013 Intel Corporation All Rights Reserved.
* @par
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
* @par
* This library 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
* Lesser General Public License for more details.
* @par
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "websocket_server.hpp"
#include "configurator.hpp"
#include "../lib/config.hpp"
#include "../lib/manager.hpp"
#include <stdexcept>
#include <thread>
namespace
{
// --------------------------------------------------------------------
// libwebsockets callbacks and related data.
// --------------------------------------------------------------------
int
callback_ivi_settings(libwebsocket_context * context,
libwebsocket * wsi,
enum libwebsocket_callback_reasons reason,
void * /* user */,
void * in,
size_t /* len */)
{
using namespace ivi::settings;
manager * const mgr = static_cast<manager *>(
libwebsocket_context_user(context));
switch(reason) {
case LWS_CALLBACK_ESTABLISHED:
// Enable event dispatching to client.
mgr->subscribe_client(wsi);
break;
case LWS_CALLBACK_CLOSED:
// Disable event dispatching to client.
mgr->unsubscribe_client(wsi);
break;
case LWS_CALLBACK_RECEIVE:
// Request has come in from Settings app. Pass it on to the
// settings manager.
mgr->dispatch(static_cast<char const *>(in), wsi);
break;
default:
break;
}
return 0;
}
struct ws_session_data_type
{
};
libwebsocket_protocols settings_protocols[] = {
{
"http-only",//"ivi-settings-protocol",
callback_ivi_settings,
sizeof(ws_session_data_type),
0,
nullptr,
0
},
{
nullptr,
nullptr,
0,
0,
nullptr,
0
}
};
}
// ----------------------------------------------------------------------
ivi::settings::websocket_server::websocket_server(
ivi::settings::configurator const & config,
ivi::settings::manager & mgr)
: context_(nullptr)
{
lws_context_creation_info info;
info.port = config.websocket_port();
info.iface = "lo"; // Only allow communication over the loopback
// interface.
info.protocols = settings_protocols;
info.extensions = libwebsocket_get_internal_extensions();
info.ssl_cert_filepath = config.ssl_cert_file();
info.ssl_private_key_filepath = config.ssl_private_key_file();
info.ssl_ca_filepath = config.ssl_ca_file();
info.ssl_cipher_list = nullptr;
info.gid = -1;
info.uid = -1;
info.options = 0;
info.user = &mgr;
info.ka_time = 0;
info.ka_probes = 0;
info.ka_interval = 0;
lws_set_log_level(LLL_INFO, lwsl_emit_syslog);
context_ = libwebsocket_create_context(&info);
if (context_ == nullptr)
throw std::runtime_error("Unable to initialize websocket.\n");
std::cout << "\n" PACKAGE_NAME " listening for requests on port "
<< info.port << ".\n";
}
ivi::settings::websocket_server::~websocket_server()
{
libwebsocket_context_destroy(context_);
}
void
ivi::settings::websocket_server::run()
{
// Run the websocket event loop in its own thread.
std::thread(
[](libwebsocket_context * context){
try {
// Run the libwebsockets event loop with an infinite timeout.
// The negative timeout causes the underlying call poll() to
// block indefinitely until an event occurs.
constexpr int const timeout = -1;
while (libwebsocket_service(context, timeout) >= 0) {
}
std::cerr << "WebSocket event loop ended.\n";
} catch(std::exception & e) {
std::cerr << e.what() << std::endl;
}
},
context_).detach();
}
/**
* @todo Add 'state' event do determine whether technology is
* enabled/disabled.
*/
// Local Variables:
// mode:c++
// c-basic-offset:2
// indent-tabs-mode: nil
// End:
|
