exception related fixes. Avoiding functions that may throw in places where exceptions shouldn't be thrown

include/libtorrent/bandwidth_manager.hpp

@@ -153,7 +153,8 @@ struct bandwidth_manager
 		m_queue.clear();
 		m_history.clear();
 		m_current_quota = 0;
-		m_history_timer.cancel();
+		error_code ec;
+		m_history_timer.cancel(ec);
 	}
 
 #ifndef NDEBUG

include/libtorrent/ssl_stream.hpp

@@ -54,7 +54,8 @@ public:
 		: m_context(io_service, asio::ssl::context::sslv23_client)
 		, m_sock(io_service, m_context)
 	{
-		m_context.set_verify_mode(asio::ssl::context::verify_none);
+		error_code ec;
+		m_context.set_verify_mode(asio::ssl::context::verify_none, ec);
 	}
 
 	typedef Stream next_layer_type;

src/http_connection.cpp

@@ -206,7 +206,8 @@ void http_connection::on_connect_timeout()
 
 	if (!m_endpoints.empty())
 	{
-		m_sock.close();
+		error_code ec;
+		m_sock.close(ec);
 	} 
 	else
 	{ 
@@ -227,8 +228,8 @@ void http_connection::on_timeout(boost::weak_ptr<http_connection> p
 	{
 		if (c->m_connection_ticket > -1 && !c->m_endpoints.empty())
 		{
-			c->m_sock.close();
 			error_code ec;
+			c->m_sock.close(ec);
 			c->m_timer.expires_at(c->m_last_receive + c->m_timeout, ec);
 			c->m_timer.async_wait(bind(&http_connection::on_timeout, p, _1));
 		}
@@ -322,7 +323,8 @@ void http_connection::on_connect(error_code const& e)
 	else if (!m_endpoints.empty() && !m_abort)
 	{
 		// The connection failed. Try the next endpoint in the list.
-		m_sock.close();
+		error_code ec;
+		m_sock.close(ec);
 		queue_connect();
 	} 
 	else
@@ -354,7 +356,8 @@ void http_connection::callback(error_code const& e, char const* data, int size)
 			}
 		}
 		m_called = true;
-		m_timer.cancel();
+		error_code ec;
+		m_timer.cancel(ec);
 		if (m_handler) m_handler(e, m_parser, data, size, *this);
 	}
 }

src/http_tracker_connection.cpp

@@ -157,8 +157,9 @@ namespace libtorrent
 
 			if (m_settings.announce_ip != address())
 			{
-				url += "&ip=";
-				url += m_settings.announce_ip.to_string();
+				error_code ec;
+				std::string ip = m_settings.announce_ip.to_string(ec);
+				if (!ec) url += "&ip=" + ip;
 			}
 
 #ifndef TORRENT_DISABLE_ENCRYPTION
@@ -382,7 +383,9 @@ namespace libtorrent
 
 				peer_entry p;
 				p.pid.clear();
-				p.ip = detail::read_v4_address(i).to_string();
+				error_code ec;
+				p.ip = detail::read_v4_address(i).to_string(ec);
+				if (ec) continue;
 				p.port = detail::read_uint16(i);
 				peer_list.push_back(p);
 			}
@@ -414,7 +417,9 @@ namespace libtorrent
 
 				peer_entry p;
 				p.pid.clear();
-				p.ip = detail::read_v6_address(i).to_string();
+				error_code ec;
+				p.ip = detail::read_v6_address(i).to_string(ec);
+				if (ec) continue;
 				p.port = detail::read_uint16(i);
 				peer_list.push_back(p);
 			}

src/kademlia/dht_tracker.cpp

@@ -88,10 +88,12 @@ namespace
 	void read_endpoint_list(libtorrent::entry const* n, std::vector<EndpointType>& epl)				
 	{
 		using namespace libtorrent;
+		if (n->type() != entry::list_t) return;
 		entry::list_type const& contacts = n->list();
 		for (entry::list_type::const_iterator i = contacts.begin()
 			, end(contacts.end()); i != end; ++i)
 		{
+			if (i->type() != entry::string_t) return;
 			std::string const& p = i->string();
 			if (p.size() < 6) continue;
 			std::string::const_iterator in = p.begin();
@@ -192,14 +194,15 @@ namespace libtorrent { namespace dht
 				m_dht.set_node_id(boost::lexical_cast<node_id>(nid->string()));
 		}
 
-		m_timer.expires_from_now(seconds(1));
+		error_code ec;
+		m_timer.expires_from_now(seconds(1), ec);
 		m_timer.async_wait(bind(&dht_tracker::tick, self(), _1));
 
-		m_connection_timer.expires_from_now(seconds(10));
+		m_connection_timer.expires_from_now(seconds(10), ec);
 		m_connection_timer.async_wait(
 			bind(&dht_tracker::connection_timeout, self(), _1));
 
-		m_refresh_timer.expires_from_now(seconds(5));
+		m_refresh_timer.expires_from_now(seconds(5), ec);
 		m_refresh_timer.async_wait(bind(&dht_tracker::refresh_timeout, self(), _1));
 
 		m_dht.bootstrap(initial_nodes, bind(&dht_tracker::on_bootstrap, self()));
@@ -209,9 +212,10 @@ namespace libtorrent { namespace dht
 	{
 		mutex_t::scoped_lock l(m_mutex);
 		m_abort = true;
-		m_timer.cancel();
-		m_connection_timer.cancel();
-		m_refresh_timer.cancel();
+		error_code ec;
+		m_timer.cancel(ec);
+		m_connection_timer.cancel(ec);
+		m_refresh_timer.cancel(ec);
 		m_host_resolver.cancel();
 	}
 
@@ -789,7 +793,6 @@ namespace libtorrent { namespace dht
 		void write_nodes_entry(entry& r, libtorrent::dht::msg const& m)
 		{
 			bool ipv6_nodes = false;
-			r["nodes"] = entry(entry::string_t);
 			entry& n = r["nodes"];
 			std::back_insert_iterator<std::string> out(n.string());
 			for (msg::nodes_t::const_iterator i = m.nodes.begin()
@@ -806,7 +809,6 @@ namespace libtorrent { namespace dht
 
 			if (ipv6_nodes)
 			{
-				r["nodes2"] = entry(entry::list_t);
 				entry& p = r["nodes2"];
 				std::string endpoint;
 				for (msg::nodes_t::const_iterator i = m.nodes.begin()

src/kademlia/node.cpp

@@ -126,7 +126,9 @@ bool node_impl::verify_token(msg const& m)
 	}
 
 	hasher h1;
-	std::string address = m.addr.address().to_string();
+	error_code ec;
+	std::string address = m.addr.address().to_string(ec);
+	if (ec) return false;
 	h1.update(&address[0], address.length());
 	h1.update((char*)&m_secret[0], sizeof(m_secret[0]));
 	h1.update((char*)&m.info_hash[0], sha1_hash::size);
@@ -150,7 +152,9 @@ entry node_impl::generate_token(msg const& m)
 	std::string token;
 	token.resize(4);
 	hasher h;
-	std::string address = m.addr.address().to_string();
+	error_code ec;
+	std::string address = m.addr.address().to_string(ec);
+	TORRENT_ASSERT(!ec);
 	h.update(&address[0], address.length());
 	h.update((char*)&m_secret[0], sizeof(m_secret[0]));
 	h.update((char*)&m.info_hash[0], sha1_hash::size);

src/logger.cpp

@@ -211,8 +211,9 @@ namespace
 		virtual boost::shared_ptr<peer_plugin> new_connection(
 			peer_connection* pc)
 		{
+			error_code ec;
 			return boost::shared_ptr<peer_plugin>(new logger_peer_plugin(
-				pc->remote().address().to_string() + "_"
+				pc->remote().address().to_string(ec) + "_"
 				+ boost::lexical_cast<std::string>(pc->remote().port()) + ".log"));
 		}
 	};

src/torrent.cpp

@@ -909,8 +909,9 @@ namespace libtorrent
 		if (req.left == -1) req.left = 16*1024;
 		req.event = e;
 		tcp::endpoint ep = m_ses.get_ipv6_interface();
+		error_code ec;
 		if (ep != tcp::endpoint())
-			req.ipv6 = ep.address().to_string();
+			req.ipv6 = ep.address().to_string(ec);
 
 		req.url = m_trackers[m_currently_trying_tracker].url;
 		// if we are aborting. we don't want any new peers
@@ -2402,9 +2403,15 @@ namespace libtorrent
 			|| p->in_handshake()
 			|| p->remote().address().is_v6()) return;
 
-		m_resolving_country = true;
 		asio::ip::address_v4 reversed(swap_bytes(p->remote().address().to_v4().to_ulong()));
-		tcp::resolver::query q(reversed.to_string() + ".zz.countries.nerd.dk", "0");
+		error_code ec;
+		tcp::resolver::query q(reversed.to_string(ec) + ".zz.countries.nerd.dk", "0");
+		if (ec)
+		{
+			p->set_country("!!");
+			return;
+		}
+		m_resolving_country = true;
 		m_host_resolver.async_resolve(q,
 			bind(&torrent::on_country_lookup, shared_from_this(), _1, _2, p));
 	}

src/torrent_handle.cpp

@@ -515,7 +515,7 @@ namespace libtorrent
 	{
 		INVARIANT_CHECK;
 #ifdef BOOST_NO_EXCEPTIONS
-		const static torrent_info empty;
+		const static torrent_info empty(sha1_hash(0));
 #endif
 		boost::shared_ptr<torrent> t = m_torrent.lock();
 		if (!t)
@@ -546,7 +546,7 @@ namespace libtorrent
 		INVARIANT_CHECK;
 
 		entry ret(entry::dictionary_t);
-		TORRENT_FORWARD(write_resume_data(ret));
+		TORRENT_FORWARD_RETURN2(write_resume_data(ret), ret);
 		t->filesystem().write_resume_data(ret);
 
 		return ret;