/*
- Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
*/
-#include "encode_server_finder.h"
-#include "exceptions.h"
-#include "util.h"
+
#include "config.h"
+#include "constants.h"
#include "cross.h"
-#include "encode_server_description.h"
#include "dcpomatic_socket.h"
-#include "raw_convert.h"
+#include "encode_server_description.h"
+#include "encode_server_finder.h"
+#include "exceptions.h"
+#include <dcp/raw_convert.h>
#include <libcxml/cxml.h>
+#include <boost/bind/placeholders.hpp>
#include <boost/lambda/lambda.hpp>
#include <iostream>
#include "i18n.h"
-using std::string;
+
+using std::cout;
using std::list;
+using std::make_shared;
+using std::shared_ptr;
+using std::string;
using std::vector;
-using std::cout;
-using boost::shared_ptr;
+using std::weak_ptr;
+using boost::optional;
using boost::scoped_array;
-using boost::weak_ptr;
+#if BOOST_VERSION >= 106100
+using namespace boost::placeholders;
+#endif
+using dcp::raw_convert;
+
EncodeServerFinder* EncodeServerFinder::_instance = 0;
+
EncodeServerFinder::EncodeServerFinder ()
- : _disabled (false)
- , _search_thread (0)
- , _listen_thread (0)
- , _stop (false)
+ : _stop (false)
{
Config::instance()->Changed.connect (boost::bind (&EncodeServerFinder::config_changed, this, _1));
}
+
void
EncodeServerFinder::start ()
{
- _search_thread = new boost::thread (boost::bind (&EncodeServerFinder::search_thread, this));
- _listen_thread = new boost::thread (boost::bind (&EncodeServerFinder::listen_thread, this));
+ _search_thread = boost::thread (boost::bind(&EncodeServerFinder::search_thread, this));
+ _listen_thread = boost::thread (boost::bind(&EncodeServerFinder::listen_thread, this));
+#ifdef DCPOMATIC_LINUX
+ pthread_setname_np (_search_thread.native_handle(), "encode-server-search");
+ pthread_setname_np (_listen_thread.native_handle(), "encode-server-listen");
+#endif
}
+
EncodeServerFinder::~EncodeServerFinder ()
{
+ stop ();
+}
+
+
+void
+EncodeServerFinder::stop ()
+{
+ boost::this_thread::disable_interruption dis;
+
_stop = true;
_search_condition.notify_all ();
- if (_search_thread) {
- /* Ideally this would be a DCPOMATIC_ASSERT(_search_thread->joinable()) but we
- can't throw exceptions from a destructor.
- */
- if (_search_thread->joinable ()) {
- _search_thread->join ();
- }
- }
+ try {
+ _search_thread.join();
+ } catch (...) {}
_listen_io_service.stop ();
- if (_listen_thread) {
- /* Ideally this would be a DCPOMATIC_ASSERT(_listen_thread->joinable()) but we
- can't throw exceptions from a destructor.
- */
- if (_listen_thread->joinable ()) {
- _listen_thread->join ();
- }
- }
+ try {
+ _listen_thread.join ();
+ } catch (...) {}
+
+ boost::mutex::scoped_lock lm (_servers_mutex);
+ _servers.clear ();
}
+
void
EncodeServerFinder::search_thread ()
try
{
+ start_of_thread ("EncodeServerFinder-search");
+
boost::system::error_code error;
boost::asio::io_service io_service;
boost::asio::ip::udp::socket socket (io_service);
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));
+ 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;
+ int const interval = 10;
while (!_stop) {
- if (Config::instance()->use_any_servers ()) {
+ 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);
+ boost::asio::ip::udp::endpoint end_point (boost::asio::ip::address_v4::broadcast(), HELLO_PORT);
+ 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;
- }
+ for (auto const& i: Config::instance()->servers()) {
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);
+ boost::asio::ip::udp::resolver::query query (i, raw_convert<string>(HELLO_PORT));
+ 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 (...) {
}
}
+ /* Discard servers that we haven't seen for a while */
+ bool removed = false;
+ {
+ boost::mutex::scoped_lock lm (_servers_mutex);
+
+ auto i = _servers.begin();
+ while (i != _servers.end()) {
+ if (i->last_seen_seconds() > 2 * interval) {
+ auto j = i;
+ ++j;
+ _servers.erase (i);
+ i = j;
+ removed = true;
+ } else {
+ ++i;
+ }
+ }
+ }
+
+ if (removed) {
+ emit (boost::bind(boost::ref(ServersListChanged)));
+ }
+
boost::mutex::scoped_lock lm (_search_condition_mutex);
- _search_condition.timed_wait (lm, boost::get_system_time() + boost::posix_time::seconds (10));
+ _search_condition.timed_wait (lm, boost::get_system_time() + boost::posix_time::seconds(interval));
}
}
catch (...)
store_current ();
}
+
void
EncodeServerFinder::listen_thread ()
try {
+ start_of_thread ("EncodeServerFinder-listen");
+
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)));
+ _listen_acceptor.reset (
+ new tcp::acceptor (_listen_io_service, tcp::endpoint(tcp::v4(), is_batch_converter ? BATCH_SERVER_PRESENCE_PORT : MAIN_SERVER_PRESENCE_PORT))
+ );
} catch (...) {
boost::throw_exception (NetworkError (_("Could not listen for remote encode servers. Perhaps another instance of DCP-o-matic is running.")));
}
store_current ();
}
+
void
EncodeServerFinder::start_accept ()
{
- shared_ptr<Socket> socket (new Socket ());
+ _accept_socket = make_shared<Socket>();
+
_listen_acceptor->async_accept (
- socket->socket(),
- boost::bind (&EncodeServerFinder::handle_accept, this, boost::asio::placeholders::error, socket)
+ _accept_socket->socket(),
+ boost::bind(&EncodeServerFinder::handle_accept, this, boost::asio::placeholders::error)
);
}
+
void
-EncodeServerFinder::handle_accept (boost::system::error_code ec, shared_ptr<Socket> socket)
+EncodeServerFinder::handle_accept (boost::system::error_code ec)
{
if (ec) {
start_accept ();
return;
}
- uint32_t length;
- socket->read (reinterpret_cast<uint8_t*> (&length), sizeof (uint32_t));
- length = ntohl (length);
+ string server_available;
- scoped_array<char> buffer (new char[length]);
- socket->read (reinterpret_cast<uint8_t*> (buffer.get()), length);
+ try {
+ uint32_t length;
+ _accept_socket->read (reinterpret_cast<uint8_t*>(&length), sizeof(uint32_t));
+ length = ntohl (length);
- string s (buffer.get());
- shared_ptr<cxml::Document> xml (new cxml::Document ("ServerAvailable"));
- xml->read_string (s);
+ if (length > 65536) {
+ start_accept();
+ return;
+ }
- 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) {
- EncodeServerDescription sd (ip, xml->number_child<int> ("Threads"));
- {
- boost::mutex::scoped_lock lm (_servers_mutex);
+ scoped_array<char> buffer(new char[length]);
+ _accept_socket->read (reinterpret_cast<uint8_t*>(buffer.get()), length);
+ server_available = buffer.get();
+ } catch (NetworkError&) {
+ /* Maybe the server went away; let's just try again */
+ start_accept();
+ return;
+ }
+
+ auto xml = make_shared<cxml::Document>("ServerAvailable");
+ xml->read_string(server_available);
+
+ auto const ip = _accept_socket->socket().remote_endpoint().address().to_string();
+ bool changed = false;
+ {
+ boost::mutex::scoped_lock lm (_servers_mutex);
+ auto i = _servers.begin();
+ while (i != _servers.end() && i->host_name() != ip) {
+ ++i;
+ }
+
+ if (i != _servers.end()) {
+ i->set_seen();
+ } else {
+ EncodeServerDescription sd (ip, xml->number_child<int>("Threads"), xml->optional_number_child<int>("Version").get_value_or(0));
_servers.push_back (sd);
+ changed = true;
}
- emit (boost::bind (boost::ref (ServersListChanged)));
}
- start_accept ();
-}
-
-bool
-EncodeServerFinder::server_found (string ip) const
-{
- boost::mutex::scoped_lock lm (_servers_mutex);
- list<EncodeServerDescription>::const_iterator i = _servers.begin();
- while (i != _servers.end() && i->host_name() != ip) {
- ++i;
+ if (changed) {
+ emit (boost::bind(boost::ref (ServersListChanged)));
}
- return i != _servers.end ();
+ start_accept ();
}
+
EncodeServerFinder*
EncodeServerFinder::instance ()
{
return _instance;
}
+
void
EncodeServerFinder::drop ()
{
delete _instance;
- _instance = 0;
+ _instance = nullptr;
}
+
list<EncodeServerDescription>
EncodeServerFinder::servers () const
{
return _servers;
}
+
void
EncodeServerFinder::config_changed (Config::Property what)
{
projects / dcpomatic.git / blobdiff