bool udp_tracker_connection::on_announce_response(span<char const> buf)
{
if (buf.size() < 20) return false;
buf = buf.subspan(8);
restart_read_timeout();
tracker_response resp;
resp.interval = aux::read_int32(buf);
resp.min_interval = 60;
resp.incomplete = aux::read_int32(buf);
resp.complete = aux::read_int32(buf);
int const num_peers = int(buf.size()) / 6;
if ((buf.size() % 6) != 0)
{
fail(error_code(errors::invalid_tracker_response_length));
return false;
}
boost::shared_ptr<request_callback> cb = requester();
#ifndef TORRENT_DISABLE_LOGGING
if (cb)
{
cb->debug_log("<== UDP_TRACKER_RESPONSE [ url: %s ]", tracker_req().url.c_str());
}
#endif
if (!cb)
{
close();
return true;
}
std::vector<peer_entry> peer_list;
resp.peers4.reserve(num_peers);
for (int i = 0; i < num_peers; ++i)
{
ipv4_peer_entry e;
memcpy(&e.ip[0], buf.data(), 4);
buf = buf.subspan(4);
e.port = aux::read_uint16(buf);
resp.peers4.push_back(e);
}
std::list<address> ip_list;
for (std::vector<tcp::endpoint>::const_iterator i = m_endpoints.begin()
, end(m_endpoints.end()); i != end; ++i)
{
ip_list.push_back(i->address());
}
cb->tracker_response(tracker_req(), m_target.address(), ip_list
, resp);
close();
return true;
}
bool udp_tracker_connection::on_connect_response(span<char const> buf)
{
// ignore packets smaller than 16 bytes
if (buf.size() < 16) return false;
restart_read_timeout();
// skip header
buf = buf.subspan(8);
// reset transaction
update_transaction_id();
std::uint64_t const connection_id = aux::read_int64(buf);
std::lock_guard<std::mutex> l(m_cache_mutex);
connection_cache_entry& cce = m_connection_cache[m_target.address()];
cce.connection_id = connection_id;
cce.expires = aux::time_now() + seconds(m_man.settings().get_int(settings_pack::udp_tracker_token_expiry));
if (0 == (tracker_req().kind & tracker_request::scrape_request))
send_udp_announce();
else if (0 != (tracker_req().kind & tracker_request::scrape_request))
send_udp_scrape();
return true;
}
