2 Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 #include "encode_server_finder.h"
22 #include "exceptions.h"
26 #include "encode_server_description.h"
27 #include "dcpomatic_socket.h"
28 #include "raw_convert.h"
29 #include <libcxml/cxml.h>
30 #include <boost/lambda/lambda.hpp>
31 #include <boost/make_shared.hpp>
40 using boost::shared_ptr;
41 using boost::scoped_array;
42 using boost::weak_ptr;
43 using boost::make_shared;
45 EncodeServerFinder* EncodeServerFinder::_instance = 0;
47 EncodeServerFinder::EncodeServerFinder ()
53 Config::instance()->Changed.connect (boost::bind (&EncodeServerFinder::config_changed, this, _1));
57 EncodeServerFinder::start ()
59 _search_thread = new boost::thread (boost::bind (&EncodeServerFinder::search_thread, this));
60 _listen_thread = new boost::thread (boost::bind (&EncodeServerFinder::listen_thread, this));
63 EncodeServerFinder::~EncodeServerFinder ()
67 _search_condition.notify_all ();
69 DCPOMATIC_ASSERT (_search_thread->joinable ());
70 _search_thread->join ();
73 _listen_io_service.stop ();
75 DCPOMATIC_ASSERT (_listen_thread->joinable ());
76 _listen_thread->join ();
81 EncodeServerFinder::search_thread ()
84 boost::system::error_code error;
85 boost::asio::io_service io_service;
86 boost::asio::ip::udp::socket socket (io_service);
87 socket.open (boost::asio::ip::udp::v4(), error);
89 throw NetworkError ("failed to set up broadcast socket");
92 socket.set_option (boost::asio::ip::udp::socket::reuse_address (true));
93 socket.set_option (boost::asio::socket_base::broadcast (true));
95 string const data = DCPOMATIC_HELLO;
98 if (Config::instance()->use_any_servers ()) {
99 /* Broadcast to look for servers */
101 boost::asio::ip::udp::endpoint end_point (boost::asio::ip::address_v4::broadcast(), Config::instance()->server_port_base() + 1);
102 socket.send_to (boost::asio::buffer (data.c_str(), data.size() + 1), end_point);
108 /* Query our `definite' servers (if there are any) */
109 vector<string> servers = Config::instance()->servers ();
110 for (vector<string>::const_iterator i = servers.begin(); i != servers.end(); ++i) {
111 if (server_found (*i)) {
112 /* Don't bother asking a server that we already know about */
116 boost::asio::ip::udp::resolver resolver (io_service);
117 boost::asio::ip::udp::resolver::query query (*i, raw_convert<string> (Config::instance()->server_port_base() + 1));
118 boost::asio::ip::udp::endpoint end_point (*resolver.resolve (query));
119 socket.send_to (boost::asio::buffer (data.c_str(), data.size() + 1), end_point);
125 boost::mutex::scoped_lock lm (_search_condition_mutex);
126 _search_condition.timed_wait (lm, boost::get_system_time() + boost::posix_time::seconds (10));
135 EncodeServerFinder::listen_thread ()
137 using namespace boost::asio::ip;
140 _listen_acceptor.reset (new tcp::acceptor (_listen_io_service, tcp::endpoint (tcp::v4(), Config::instance()->server_port_base() + 1)));
142 boost::throw_exception (NetworkError (_("Could not listen for remote encode servers. Perhaps another instance of DCP-o-matic is running.")));
146 _listen_io_service.run ();
154 EncodeServerFinder::start_accept ()
156 shared_ptr<Socket> socket = make_shared<Socket> ();
157 _listen_acceptor->async_accept (
159 boost::bind (&EncodeServerFinder::handle_accept, this, boost::asio::placeholders::error, socket)
164 EncodeServerFinder::handle_accept (boost::system::error_code ec, shared_ptr<Socket> socket)
172 socket->read (reinterpret_cast<uint8_t*> (&length), sizeof (uint32_t));
173 length = ntohl (length);
175 scoped_array<char> buffer (new char[length]);
176 socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
178 string s (buffer.get());
179 shared_ptr<cxml::Document> xml = make_shared<cxml::Document> ("ServerAvailable");
180 xml->read_string (s);
182 string const ip = socket->socket().remote_endpoint().address().to_string ();
183 if (!server_found (ip) && xml->optional_number_child<int>("Version").get_value_or (0) == SERVER_LINK_VERSION) {
184 EncodeServerDescription sd (ip, xml->number_child<int> ("Threads"));
186 boost::mutex::scoped_lock lm (_servers_mutex);
187 _servers.push_back (sd);
189 emit (boost::bind (boost::ref (ServersListChanged)));
196 EncodeServerFinder::server_found (string ip) const
198 boost::mutex::scoped_lock lm (_servers_mutex);
199 list<EncodeServerDescription>::const_iterator i = _servers.begin();
200 while (i != _servers.end() && i->host_name() != ip) {
204 return i != _servers.end ();
208 EncodeServerFinder::instance ()
211 _instance = new EncodeServerFinder ();
219 EncodeServerFinder::drop ()
225 list<EncodeServerDescription>
226 EncodeServerFinder::servers () const
228 boost::mutex::scoped_lock lm (_servers_mutex);
233 EncodeServerFinder::config_changed (Config::Property what)
235 if (what == Config::USE_ANY_SERVERS || what == Config::SERVERS) {
237 boost::mutex::scoped_lock lm (_servers_mutex);
240 ServersListChanged ();
241 _search_condition.notify_all ();