/*
- Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+ 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
*/
-#include <libcxml/cxml.h>
#include "server_finder.h"
#include "exceptions.h"
#include "util.h"
#include "config.h"
#include "cross.h"
-#include "ui_signaller.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::stringstream;
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 ()
- : _broadcast_thread (0)
+ : _disabled (false)
+ , _search_thread (0)
, _listen_thread (0)
+ , _stop (false)
+{
+ Config::instance()->Changed.connect (boost::bind (&ServerFinder::config_changed, this, _1));
+}
+
+void
+ServerFinder::start ()
{
- _broadcast_thread = new boost::thread (boost::bind (&ServerFinder::broadcast_thread, this));
+ _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::broadcast_thread ()
+ServerFinder::search_thread ()
+try
{
boost::system::error_code error;
boost::asio::io_service io_service;
socket.set_option (boost::asio::ip::udp::socket::reuse_address (true));
socket.set_option (boost::asio::socket_base::broadcast (true));
-
- boost::asio::ip::udp::endpoint end_point (boost::asio::ip::address_v4::broadcast(), Config::instance()->server_port_base() + 1);
- while (1) {
- string const data = DCPOMATIC_HELLO;
- socket.send_to (boost::asio::buffer (data.c_str(), data.size() + 1), end_point);
- dcpomatic_sleep (10);
+ 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 (...)
{
- while (1) {
- shared_ptr<Socket> sock (new Socket (10));
+ store_current ();
+}
- try {
- sock->accept (Config::instance()->server_port_base() + 1);
- } catch (std::exception& e) {
- continue;
- }
+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)
+ );
+}
- uint32_t length = sock->read_uint32 ();
- scoped_array<char> buffer (new char[length]);
- sock->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
-
- stringstream s (buffer.get());
- shared_ptr<cxml::Document> xml (new cxml::Document ("ServerAvailable"));
- xml->read_stream (s);
+void
+ServerFinder::handle_accept (boost::system::error_code ec, shared_ptr<Socket> socket)
+{
+ if (ec) {
+ start_accept ();
+ return;
+ }
- boost::mutex::scoped_lock lm (_mutex);
+ uint32_t length;
+ socket->read (reinterpret_cast<uint8_t*> (&length), sizeof (uint32_t));
+ length = ntohl (length);
- string const ip = sock->socket().remote_endpoint().address().to_string ();
- list<ServerDescription>::const_iterator i = _servers.begin();
- while (i != _servers.end() && i->host_name() != ip) {
- ++i;
- }
+ 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);
- if (i == _servers.end ()) {
- ServerDescription sd (ip, xml->number_child<int> ("Threads"));
+ 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);
- ui_signaller->emit (boost::bind (boost::ref (ServerFound), sd));
}
+ emit (boost::bind (boost::ref (ServersListChanged)));
}
+
+ start_accept ();
}
-void
-ServerFinder::connect (boost::function<void (ServerDescription)> fn)
+bool
+ServerFinder::server_found (string ip) const
{
- boost::mutex::scoped_lock lm (_mutex);
-
- /* Emit the current list of servers */
- for (list<ServerDescription>::iterator i = _servers.begin(); i != _servers.end(); ++i) {
- fn (*i);
+ boost::mutex::scoped_lock lm (_servers_mutex);
+ list<ServerDescription>::const_iterator i = _servers.begin();
+ while (i != _servers.end() && i->host_name() != ip) {
+ ++i;
}
- ServerFound.connect (fn);
+ return i != _servers.end ();
}
ServerFinder*
{
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