fixes for metadata-less torrents, and fixes for peer requests

src/peer_connection.cpp

@@ -943,6 +943,10 @@ namespace libtorrent
 				, m_download_queue.end()
 				, block_finished);
 
+		// if there's another peer that needs to do another
+		// piece request, this will point to it
+		peer_connection* request_peer = 0;
+
 		if (b != m_download_queue.end())
 		{
 			if (m_assume_fifo)
@@ -985,11 +989,7 @@ namespace libtorrent
 				if (pc && pc != this)
 				{
 					pc->cancel_request(block_finished);
-					if (!pc->has_peer_choked() && !t->is_seed())
-					{
-						request_a_block(*t, *pc);
-						pc->send_block_requests();
-					}
+					request_peer = pc;
 				}
 			}
 			else
@@ -1015,6 +1015,12 @@ namespace libtorrent
 			t->received_redundant_data(t->block_size());
 			pol.block_finished(*this, block_finished);
 			send_block_requests();
+
+			if (request_peer && !request_peer->has_peer_choked() && !t->is_seed())
+			{
+				request_a_block(*t, *request_peer);
+				request_peer->send_block_requests();
+			}
 			return;
 		}
 		
@@ -1029,6 +1035,12 @@ namespace libtorrent
 		}
 		catch (std::exception const&) {}
 
+		if (request_peer && !request_peer->has_peer_choked() && !t->is_seed())
+		{
+			request_a_block(*t, *request_peer);
+			request_peer->send_block_requests();
+		}
+
 #ifndef NDEBUG
 		try
 		{
@@ -1765,7 +1777,7 @@ namespace libtorrent
 #endif
 
 				// the upload queue should not have non-prioritized peers
-				t->request_bandwidth(upload_channel, self(), /*m_non_prioritized*/ false);
+				t->request_bandwidth(upload_channel, self(), false);
 				m_writing = true;
 			}
 			return;

src/torrent.cpp

@@ -2199,10 +2199,17 @@ namespace libtorrent
 		}
 
 		size_type total_done = quantized_bytes_done();
-		if (is_seed())
-			assert(total_done == m_torrent_file.total_size());
+		if (m_torrent_file.is_valid())
+		{
+			if (is_seed())
+				assert(total_done == m_torrent_file.total_size());
+			else
+				assert(total_done != m_torrent_file.total_size());
+		}
 		else
-			assert(total_done != m_torrent_file.total_size());
+		{
+			assert(total_done == 0);
+		}
 
 // This check is very expensive.
 		assert(m_num_pieces

src/torrent_info.cpp

@@ -238,7 +238,7 @@ namespace libtorrent
 	// just the necessary to use it with piece manager
 	// used for torrents with no metadata
 	torrent_info::torrent_info(sha1_hash const& info_hash)
-		: m_piece_length(256 * 1024)
+		: m_piece_length(0)
 		, m_total_size(0)
 		, m_info_hash(info_hash)
 		, m_name()
@@ -250,7 +250,7 @@ namespace libtorrent
 	}
 
 	torrent_info::torrent_info()
-		: m_piece_length(256 * 1024)
+		: m_piece_length(0)
 		, m_total_size(0)
 		, m_info_hash(0)
 		, m_name()
@@ -543,18 +543,18 @@ namespace libtorrent
 		m_files.push_back(e);
 
 		m_total_size += size;
+		
+		if (m_piece_length == 0)
+			m_piece_length = 256 * 1024;
 
 		int num_pieces = static_cast<int>(
 			(m_total_size + m_piece_length - 1) / m_piece_length);
 		int old_num_pieces = static_cast<int>(m_piece_hash.size());
 
 		m_piece_hash.resize(num_pieces);
-		for (std::vector<sha1_hash>::iterator i = m_piece_hash.begin() + old_num_pieces;
-			i != m_piece_hash.end(); ++i)
-		{
-			i->clear();
-		}
-
+		if (num_pieces > old_num_pieces)
+			std::for_each(m_piece_hash.begin() + old_num_pieces
+				, m_piece_hash.end(), boost::bind(&sha1_hash::clear, _1));
 	}
 
 	void torrent_info::add_url_seed(std::string const& url)