an approximate peer download rate is now in peer_info

examples/client_test.cpp

@@ -269,11 +269,11 @@ int peer_index(libtorrent::tcp::endpoint addr, std::vector<libtorrent::peer_info
 void print_peer_info(std::ostream& out, std::vector<libtorrent::peer_info> const& peers)
 {
 	using namespace libtorrent;
-	out << " down    (total)   up      (total)  que req flags    source fail hshf sndb inactive wait block-progress "
+	out << " down    (total)   up      (total)  que req flags      source fail hshf sndb inactive wait block-progress "
 #ifndef TORRENT_DISABLE_RESOLVE_COUNTRIES
 		"country "
 #endif
-		"client \n";
+		"peer-rate client \n";
 
 	for (std::vector<peer_info>::const_iterator i = peers.begin();
 		i != peers.end(); ++i)
@@ -300,6 +300,8 @@ void print_peer_info(std::ostream& out, std::vector<libtorrent::peer_info> const
 #ifndef TORRENT_DISABLE_ENCRYPTION
 			<< ((i->flags & peer_info::rc4_encrypted)?'E':
 				(i->flags & peer_info::plaintext_encrypted)?'e':'.')
+#else
+			<< "  "
 #endif
 			<< " "
 			<< ((i->source & peer_info::tracker)?"T":"_")
@@ -333,6 +335,8 @@ void print_peer_info(std::ostream& out, std::vector<libtorrent::peer_info> const
 			out << " " << i->country[0] << i->country[1];
 		}
 #endif
+		out << (i->remote_dl_rate > 0 ? add_suffix(i->remote_dl_rate) + "/s ": "         ") << " ";
+
 		if (i->flags & peer_info::handshake)
 		{
 			out << esc("31") << " waiting for handshake" << esc("0") << "\n";

include/libtorrent/peer_connection.hpp

@@ -681,6 +681,15 @@ namespace libtorrent
 		// so that it can be removed from the queue
 		// once the connection completes
 		int m_connection_ticket;
+		
+		// bytes downloaded since last second
+		// timer timeout; used for determining 
+		// approx download rate
+		int m_remote_bytes_dled;
+
+		// approximate peer download rate
+		int m_remote_dl_rate;
+		
 #ifndef NDEBUG
 	public:
 		bool m_in_constructor;

include/libtorrent/peer_info.hpp

@@ -141,6 +141,9 @@ namespace libtorrent
 			web_seed = 1
 		};
 		int connection_type;
+		
+		// approximate peer download rate
+		int remote_dl_rate;
 	};
 
 }

src/peer_connection.cpp

@@ -128,6 +128,8 @@ namespace libtorrent
 		, m_peer_info(peerinfo)
 		, m_speed(slow)
 		, m_connection_ticket(-1)
+		, m_remote_bytes_dled(0)
+		, m_remote_dl_rate(0)
 #ifndef NDEBUG
 		, m_in_constructor(true)
 #endif
@@ -198,6 +200,8 @@ namespace libtorrent
 		, m_download_limit(resource_request::inf)
 		, m_peer_info(peerinfo)
 		, m_speed(slow)
+		, m_remote_bytes_dled(0)
+		, m_remote_dl_rate(0)
 #ifndef NDEBUG
 		, m_in_constructor(true)
 #endif
@@ -743,6 +747,9 @@ namespace libtorrent
 					&& t->picker().piece_priority(index) != 0)
 					t->get_policy().peer_is_interesting(*this);
 			}
+			
+			// update bytes downloaded since last timer
+			m_remote_bytes_dled += t->torrent_file().piece_size(index);
 
 			if (is_seed())
 			{
@@ -1753,12 +1760,14 @@ namespace libtorrent
 			p.failcount = peer_info_struct()->failcount;
 			p.num_hashfails = peer_info_struct()->hashfails;
 			p.flags |= peer_info_struct()->on_parole ? peer_info::on_parole : 0;
+			p.remote_dl_rate = m_remote_dl_rate;
 		}
 		else
 		{
 			p.source = 0;
 			p.failcount = 0;
 			p.num_hashfails = 0;
+			p.remote_dl_rate = 0;
 		}
 
 		p.send_buffer_size = send_buffer_size();
@@ -1915,6 +1924,24 @@ namespace libtorrent
 				, m_upload_limit));
 		}
 
+		// note the 1/60 multiplication here - this is per second of the
+		// minute; but since timers are not exact this makes this
+		// calculation REALLY approximate.
+		
+		float factor = 0.6666666666667f;
+			
+		if(m_remote_dl_rate == 0) {
+			factor = 0.0f;
+		}
+						
+		m_remote_dl_rate = 
+			(m_remote_dl_rate * factor) + 
+			((m_remote_bytes_dled * (1.0f-factor)) * (1.f/60.f));
+			
+		m_remote_bytes_dled = 0;
+
+
+		//
 		fill_send_buffer();
 /*
 		size_type diff = share_diff();