void RotateHelper::sample() { x = 1000 * getacx(); y = 1000 * getacy(); z = 1000 * getacz(); if(packet_reader()){ int pos= define_position(); if(pos != last_pos) maybe_rotate(pos); last_pos= pos; }else{ qWarning("RotateHelper: packet reader failed"); stop(); } }
bool ip_voter::cast_vote(address const& ip , int source_type, address const& source) { if (is_any(ip)) return false; if (is_local(ip)) return false; if (is_loopback(ip)) return false; // don't trust source that aren't connected to us // on a different address family than the external // IP they claim we have if (ip.is_v4() != source.is_v4()) return false; // this is the key to use for the bloom filters // it represents the identity of the voter sha1_hash k; hash_address(source, k); // do we already have an entry for this external IP? std::vector<external_ip_t>::iterator i = std::find_if(m_external_addresses.begin() , m_external_addresses.end(), boost::bind(&external_ip_t::addr, _1) == ip); if (i == m_external_addresses.end()) { // each IP only gets to add a new IP once if (m_external_address_voters.find(k)) return maybe_rotate(); if (m_external_addresses.size() > 40) { if (random() % 100 < 50) return maybe_rotate(); // use stable sort here to maintain the fifo-order // of the entries with the same number of votes // this will sort in ascending order, i.e. the lowest // votes first. Also, the oldest are first, so this // is a sort of weighted LRU. std::stable_sort(m_external_addresses.begin(), m_external_addresses.end()); // erase the last element, since it is one of the // ones with the fewest votes m_external_addresses.erase(m_external_addresses.end() - 1); } m_external_addresses.push_back(external_ip_t()); i = m_external_addresses.end() - 1; i->addr = ip; } // add one more vote to this external IP if (!i->add_vote(k, source_type)) return maybe_rotate(); ++m_total_votes; if (m_valid_external) return maybe_rotate(); i = std::min_element(m_external_addresses.begin(), m_external_addresses.end()); TORRENT_ASSERT(i != m_external_addresses.end()); if (i->addr == m_external_address) return maybe_rotate(); if (m_external_address != address_v4()) { // we have a temporary external address. As soon as we have // more than 25 votes, consider deciding which one to settle for return (m_total_votes >= 25) ? maybe_rotate() : false; } m_external_address = i->addr; return true; }