researching bootstrap nodes of libtorrent

src/mix.cpp

@@ -107,27 +107,37 @@ class mix
          lt::settings_pack p;
          p.set_int(lt::settings_pack::alert_mask,lt::alert_category::status | lt::alert_category::error);
          lt::session ses(p);
-         lt::add_torrent_params atp = lt::parse_magnet_uri("magnet:?xt=urn:btih:D540FC48EB12F2833163EED6421D449DD8F1CE1F&dn=Ubuntu%20desktop%2019.04%20(64bit)");         
-         atp.save_path=".";
-         lt::torrent_handle h = ses.add_torrent(std::move(atp));
-
-         for (;;)
-            {
-            std::vector<lt::alert*> alerts;
-            ses.pop_alerts(&alerts);
-               for (lt::alert const* a : alerts)
-                  {
-                  std::cout << a->message() << std::endl;
-                  if (lt::alert_cast<lt::torrent_finished_alert>(a))
-                     {
-                     std::cout << "Torrent finished" << std::endl;
-                     }
-                  if (lt::alert_cast<lt::torrent_error_alert>(a))
-                     {
-                     std::cout << "Torrent error" << std::endl;
-                     }
-                  }
-            }
+         std::cout << "libtorrent version: " << lt::version() << std::endl;
+         std::cout << "announce ip: " << p.announce_ip << std::endl;       
+         std::cout << "user agent: " << p.user_agent << std::endl;
+         std::cout << "listen interfaces: " << p.listen_interfaces << std::endl;
+         std::cout << "peer fingerprint: " << p.peer_fingerprint << std::endl;
+         p.set_str(lt::settings_pack::dht_bootstrap_nodes, "dht.bootstrap.de:12345");
+         std::cout << "dht bootstrap nodes: " << p.get_str(11)  << std::endl;
+
+
+//         lt::add_torrent_params atp = lt::parse_magnet_uri("magnet:?xt=urn:btih:D540FC48EB12F2833163EED6421D449DD8F1CE1F&dn=Ubuntu%20desktop%2019.04%20(64bit)");         
+//         atp.save_path=".";
+//         lt::torrent_handle h = ses.add_torrent(std::move(atp));
+
+//         for (;;)
+//            {
+//            std::vector<lt::alert*> alerts;
+//            ses.pop_alerts(&alerts);
+//               for (lt::alert const* a : alerts)
+//                  {
+//                  std::cout << a->message() << std::endl;
+//                  if (lt::alert_cast<lt::torrent_finished_alert>(a))
+//                     {
+//                     std::cout << "Torrent finished" << std::endl;
+//                     }
+//                  if (lt::alert_cast<lt::torrent_error_alert>(a))
+//                     {
+//                     std::cout << "Torrent error" << std::endl;
+//                     }
+
+//                  }
+//            }