added incoming lsd alert

ChangeLog

@@ -1,3 +1,4 @@
+	* added alert for incoming local service discovery messages
 	* added option to set file priorities when adding torrents
 	* removed the session mutex for improved performance
 	* added upload and download activity timer stats for torrents

docs/manual.rst

@@ -5875,6 +5875,20 @@ This alert is generated when a block request receives a response.
 	};
 
 
+lsd_peer_alert
+--------------
+
+This alert is generated when we receive a local service discovery message from a peer
+for a torrent we're currently participating in.
+
+::
+
+	struct lsd_peer_alert: peer_alert
+	{
+		// ...
+	};
+
+
 file_completed_alert
 --------------------
 

include/libtorrent/alert_types.hpp

@@ -1154,6 +1154,19 @@ namespace libtorrent
 		std::string str;
 	};
 
+	struct TORRENT_EXPORT lsd_peer_alert: peer_alert
+	{
+		lsd_peer_alert(torrent_handle const& h
+			, tcp::endpoint const& ip_)
+			: peer_alert(h, ip_, peer_id(0))
+		{}
+
+		TORRENT_DEFINE_ALERT(lsd_peer_alert);
+
+		const static int static_category = alert::peer_notification;
+		virtual std::string message() const;
+	};
+
 }
 
 

src/alert.cpp

@@ -477,5 +477,13 @@ namespace libtorrent {
 		return msg;
 	}
 
+	std::string lsd_peer_alert::message() const
+	{
+		char msg[200];
+		snprintf(msg, sizeof(msg), "%s: received peer from local service discovery"
+			, peer_alert::message().c_str());
+		return msg;
+	}
+
 } // namespace libtorrent
 

src/session_impl.cpp

@@ -3300,6 +3300,8 @@ namespace aux {
 			<< ": added peer from local discovery: " << peer << "\n";
 #endif
 		t->get_policy().add_peer(peer, peer_id(0), peer_info::lsd, 0);
+		if (m_alerts.should_post<lsd_peer_alert>())
+			m_alerts.post_alert(lsd_peer_alert(t->get_handle(), peer));
 	}
 
 	void session_impl::on_port_map_log(