hint DHT bootstrap nodes of actual bootstrap request

ChangeLog

@@ -1,3 +1,5 @@
+	* hint DHT bootstrap nodes of actual bootstrap request
+
 1.1.1 release
 
 	* update puff.c for gzip inflation

simulation/fake_peer.hpp

@@ -208,10 +208,12 @@ struct fake_node
 
 			lt::bdecode_node n;
 			boost::system::error_code err;
-			int const ret = bdecode(m_in_buffer, m_in_buffer + bytes_transferred
+			int const ret = bdecode(m_in_buffer.data(), m_in_buffer.data() + bytes_transferred
 				, n, err, nullptr, 10, 200);
 			TEST_EQUAL(ret, 0);
 
+			m_incoming_packets.emplace_back(m_in_buffer.data(), m_in_buffer.data() + bytes_transferred);
+
 			// TODO: ideally we would validate the DHT message
 			m_tripped = true;
 		});
@@ -224,9 +226,14 @@ struct fake_node
 
 	bool tripped() const { return m_tripped; }
 
+	std::vector<std::vector<char>> const& incoming_packets() const
+	{ return m_incoming_packets; }
+
 private:
 
-	char m_in_buffer[300];
+	std::array<char, 300> m_in_buffer;
+
+	std::vector<std::vector<char>> m_incoming_packets;
 
 	asio::io_service m_ios;
 	asio::ip::udp::socket m_socket;

simulation/test_dht_bootstrap.cpp

@@ -92,5 +92,15 @@ TORRENT_TEST(dht_bootstrap)
 	sim.run();
 
 	TEST_EQUAL(node.tripped(), true);
+
+	std::vector<char> const& p = node.incoming_packets().front();
+	lt::bdecode_node n;
+	boost::system::error_code err;
+	int const ret = bdecode(p.data(), p.data() + p.size()
+		, n, err, nullptr, 10, 200);
+	TEST_EQUAL(ret, 0);
+
+	lt::bdecode_node a = n.dict_find_dict("a");
+	TEST_CHECK(a.dict_find_int_value("bs", -1) == 1);
 }
 

src/kademlia/refresh.cpp

@@ -65,6 +65,14 @@ bool bootstrap::invoke(observer_ptr o)
 	make_id_secret(target);
 	a["info_hash"] = target.to_string();
 
+	if (o->flags & observer::flag_initial)
+	{
+		// if this packet is being sent to a bootstrap/router node, let it know
+		// that we're actualy bootstrapping (as opposed to being collateral
+		// traffic).
+		a["bs"] = 1;
+	}
+
 //	e["q"] = "find_node";
 //	a["target"] = target.to_string();
 	m_node.stats_counters().inc_stats_counter(counters::dht_get_peers_out);