+++ /dev/null
-/*
- Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-*/
-
-#include "server_finder.h"
-#include "exceptions.h"
-#include "util.h"
-#include "config.h"
-#include "cross.h"
-#include "server_description.h"
-#include "dcpomatic_socket.h"
-#include "raw_convert.h"
-#include <libcxml/cxml.h>
-#include <boost/lambda/lambda.hpp>
-#include <iostream>
-
-#include "i18n.h"
-
-using std::string;
-using std::list;
-using std::vector;
-using std::cout;
-using boost::shared_ptr;
-using boost::scoped_array;
-using boost::weak_ptr;
-
-ServerFinder* ServerFinder::_instance = 0;
-
-ServerFinder::ServerFinder ()
- : _disabled (false)
- , _search_thread (0)
- , _listen_thread (0)
- , _stop (false)
-{
- Config::instance()->Changed.connect (boost::bind (&ServerFinder::config_changed, this, _1));
-}
-
-void
-ServerFinder::start ()
-{
- _search_thread = new boost::thread (boost::bind (&ServerFinder::search_thread, this));
- _listen_thread = new boost::thread (boost::bind (&ServerFinder::listen_thread, this));
-}
-
-ServerFinder::~ServerFinder ()
-{
- _stop = true;
-
- _search_condition.notify_all ();
- if (_search_thread) {
- DCPOMATIC_ASSERT (_search_thread->joinable ());
- _search_thread->join ();
- }
-
- _listen_io_service.stop ();
- if (_listen_thread) {
- DCPOMATIC_ASSERT (_listen_thread->joinable ());
- _listen_thread->join ();
- }
-}
-
-void
-ServerFinder::search_thread ()
-try
-{
- boost::system::error_code error;
- boost::asio::io_service io_service;
- boost::asio::ip::udp::socket socket (io_service);
- socket.open (boost::asio::ip::udp::v4(), error);
- if (error) {
- throw NetworkError ("failed to set up broadcast socket");
- }
-
- socket.set_option (boost::asio::ip::udp::socket::reuse_address (true));
- socket.set_option (boost::asio::socket_base::broadcast (true));
-
- string const data = DCPOMATIC_HELLO;
-
- while (!_stop) {
- if (Config::instance()->use_any_servers ()) {
- /* Broadcast to look for servers */
- try {
- boost::asio::ip::udp::endpoint end_point (boost::asio::ip::address_v4::broadcast(), Config::instance()->server_port_base() + 1);
- socket.send_to (boost::asio::buffer (data.c_str(), data.size() + 1), end_point);
- } catch (...) {
-
- }
- }
-
- /* Query our `definite' servers (if there are any) */
- vector<string> servers = Config::instance()->servers ();
- for (vector<string>::const_iterator i = servers.begin(); i != servers.end(); ++i) {
- if (server_found (*i)) {
- /* Don't bother asking a server that we already know about */
- continue;
- }
- try {
- boost::asio::ip::udp::resolver resolver (io_service);
- boost::asio::ip::udp::resolver::query query (*i, raw_convert<string> (Config::instance()->server_port_base() + 1));
- boost::asio::ip::udp::endpoint end_point (*resolver.resolve (query));
- socket.send_to (boost::asio::buffer (data.c_str(), data.size() + 1), end_point);
- } catch (...) {
-
- }
- }
-
- boost::mutex::scoped_lock lm (_search_condition_mutex);
- _search_condition.timed_wait (lm, boost::get_system_time() + boost::posix_time::seconds (10));
- }
-}
-catch (...)
-{
- store_current ();
-}
-
-void
-ServerFinder::listen_thread ()
-try {
- using namespace boost::asio::ip;
-
- try {
- _listen_acceptor.reset (new tcp::acceptor (_listen_io_service, tcp::endpoint (tcp::v4(), Config::instance()->server_port_base() + 1)));
- } catch (...) {
- boost::throw_exception (NetworkError (_("Could not listen for remote encode servers. Perhaps another instance of DCP-o-matic is running.")));
- }
-
- start_accept ();
- _listen_io_service.run ();
-}
-catch (...)
-{
- store_current ();
-}
-
-void
-ServerFinder::start_accept ()
-{
- shared_ptr<Socket> socket (new Socket ());
- _listen_acceptor->async_accept (
- socket->socket(),
- boost::bind (&ServerFinder::handle_accept, this, boost::asio::placeholders::error, socket)
- );
-}
-
-void
-ServerFinder::handle_accept (boost::system::error_code ec, shared_ptr<Socket> socket)
-{
- if (ec) {
- start_accept ();
- return;
- }
-
- uint32_t length;
- socket->read (reinterpret_cast<uint8_t*> (&length), sizeof (uint32_t));
- length = ntohl (length);
-
- scoped_array<char> buffer (new char[length]);
- socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
-
- string s (buffer.get());
- shared_ptr<cxml::Document> xml (new cxml::Document ("ServerAvailable"));
- xml->read_string (s);
-
- string const ip = socket->socket().remote_endpoint().address().to_string ();
- if (!server_found (ip) && xml->optional_number_child<int>("Version").get_value_or (0) == SERVER_LINK_VERSION) {
- ServerDescription sd (ip, xml->number_child<int> ("Threads"));
- {
- boost::mutex::scoped_lock lm (_servers_mutex);
- _servers.push_back (sd);
- }
- emit (boost::bind (boost::ref (ServersListChanged)));
- }
-
- start_accept ();
-}
-
-bool
-ServerFinder::server_found (string ip) const
-{
- boost::mutex::scoped_lock lm (_servers_mutex);
- list<ServerDescription>::const_iterator i = _servers.begin();
- while (i != _servers.end() && i->host_name() != ip) {
- ++i;
- }
-
- return i != _servers.end ();
-}
-
-ServerFinder*
-ServerFinder::instance ()
-{
- if (!_instance) {
- _instance = new ServerFinder ();
- _instance->start ();
- }
-
- return _instance;
-}
-
-void
-ServerFinder::drop ()
-{
- delete _instance;
- _instance = 0;
-}
-
-list<ServerDescription>
-ServerFinder::servers () const
-{
- boost::mutex::scoped_lock lm (_servers_mutex);
- return _servers;
-}
-
-void
-ServerFinder::config_changed (Config::Property what)
-{
- if (what == Config::USE_ANY_SERVERS || what == Config::SERVERS) {
- {
- boost::mutex::scoped_lock lm (_servers_mutex);
- _servers.clear ();
- }
- ServersListChanged ();
- _search_condition.notify_all ();
- }
-}
projects / dcpomatic.git / blobdiff