// check if the fastresume data is up to date
// if it is, use it and return true. If it
// isn't return false and the full check
// will be run
int piece_manager::check_fastresume(
lazy_entry const& rd, error_code& error)
{
mutex::scoped_lock lock(m_mutex);
INVARIANT_CHECK;
TORRENT_ASSERT(m_files.piece_length() > 0);
m_current_slot = 0;
// if we don't have any resume data, return
if (rd.type() == lazy_entry::none_t) return check_no_fastresume(error);
if (rd.type() != lazy_entry::dict_t)
{
error = errors::not_a_dictionary;
return check_no_fastresume(error);
}
int block_size = (std::min)(16 * 1024, m_files.piece_length());
int blocks_per_piece = int(rd.dict_find_int_value("blocks per piece", -1));
if (blocks_per_piece != -1
&& blocks_per_piece != m_files.piece_length() / block_size)
{
error = errors::invalid_blocks_per_piece;
return check_no_fastresume(error);
}
if (!m_storage->verify_resume_data(rd, error))
return check_no_fastresume(error);
return check_init_storage(error);
}
void http_tracker_connection::parse(int status_code, lazy_entry const& e)
{
boost::shared_ptr<request_callback> cb = requester();
if (!cb) return;
int interval = int(e.dict_find_int_value("interval", 1800));
int min_interval = int(e.dict_find_int_value("min interval", 60));
std::string trackerid;
lazy_entry const* tracker_id = e.dict_find_string("tracker id");
if (tracker_id)
trackerid = tracker_id->string_value();
// parse the response
lazy_entry const* failure = e.dict_find_string("failure reason");
if (failure)
{
fail(error_code(errors::tracker_failure), status_code
, failure->string_value().c_str(), interval, min_interval);
return;
}
lazy_entry const* warning = e.dict_find_string("warning message");
if (warning)
cb->tracker_warning(tracker_req(), warning->string_value());
std::vector<peer_entry> peer_list;
if (tracker_req().kind == tracker_request::scrape_request)
{
std::string ih = tracker_req().info_hash.to_string();
lazy_entry const* files = e.dict_find_dict("files");
if (files == 0)
{
fail(error_code(errors::invalid_files_entry), -1, ""
, interval, min_interval);
return;
}
lazy_entry const* scrape_data = files->dict_find_dict(ih.c_str());
if (scrape_data == 0)
{
fail(error_code(errors::invalid_hash_entry), -1, ""
, interval, min_interval);
return;
}
int complete = int(scrape_data->dict_find_int_value("complete", -1));
int incomplete = int(scrape_data->dict_find_int_value("incomplete", -1));
int downloaded = int(scrape_data->dict_find_int_value("downloaded", -1));
int downloaders = int(scrape_data->dict_find_int_value("downloaders", -1));
cb->tracker_scrape_response(tracker_req(), complete
, incomplete, downloaded, downloaders);
return;
}
lazy_entry const* peers_ent = e.dict_find("peers");
if (peers_ent && peers_ent->type() == lazy_entry::string_t)
{
char const* peers = peers_ent->string_ptr();
int len = peers_ent->string_length();
for (int i = 0; i < len; i += 6)
{
if (len - i < 6) break;
peer_entry p;
p.pid.clear();
error_code ec;
p.ip = detail::read_v4_address(peers).to_string(ec);
p.port = detail::read_uint16(peers);
if (ec) continue;
peer_list.push_back(p);
}
}
else if (peers_ent && peers_ent->type() == lazy_entry::list_t)
{
int len = peers_ent->list_size();
for (int i = 0; i < len; ++i)
{
peer_entry p;
if (!extract_peer_info(*peers_ent->list_at(i), p)) return;
peer_list.push_back(p);
}
}
else
{
peers_ent = 0;
}
#if TORRENT_USE_IPV6
lazy_entry const* ipv6_peers = e.dict_find_string("peers6");
if (ipv6_peers)
{
char const* peers = ipv6_peers->string_ptr();
int len = ipv6_peers->string_length();
for (int i = 0; i < len; i += 18)
{
if (len - i < 18) break;
peer_entry p;
p.pid.clear();
error_code ec;
p.ip = detail::read_v6_address(peers).to_string(ec);
p.port = detail::read_uint16(peers);
if (ec) continue;
peer_list.push_back(p);
}
}
else
{
ipv6_peers = 0;
}
#else
lazy_entry const* ipv6_peers = 0;
#endif
// if we didn't receive any peers. We don't care if we're stopping anyway
if (peers_ent == 0 && ipv6_peers == 0
&& tracker_req().event != tracker_request::stopped)
{
fail(error_code(errors::invalid_peers_entry), -1, ""
, interval, min_interval);
return;
}
// look for optional scrape info
address external_ip;
lazy_entry const* ip_ent = e.dict_find_string("external ip");
if (ip_ent)
{
char const* p = ip_ent->string_ptr();
if (ip_ent->string_length() == address_v4::bytes_type().size())
external_ip = detail::read_v4_address(p);
#if TORRENT_USE_IPV6
else if (ip_ent->string_length() == address_v6::bytes_type().size())
external_ip = detail::read_v6_address(p);
#endif
}
int complete = int(e.dict_find_int_value("complete", -1));
int incomplete = int(e.dict_find_int_value("incomplete", -1));
std::list<address> ip_list;
if (m_tracker_connection)
{
error_code ec;
ip_list.push_back(m_tracker_connection->socket().remote_endpoint(ec).address());
std::list<tcp::endpoint> const& epts = m_tracker_connection->endpoints();
for (std::list<tcp::endpoint>::const_iterator i = epts.begin()
, end(epts.end()); i != end; ++i)
{
ip_list.push_back(i->address());
}
}
cb->tracker_response(tracker_req(), m_tracker_ip, ip_list, peer_list
, interval, min_interval, complete, incomplete, external_ip, trackerid);
}