コード例 #1
0
ファイル: FloodfillMonitorJob.java プロジェクト: i2p/i2p.i2p
  private boolean shouldBeFloodfill() {
    if (!SigType.ECDSA_SHA256_P256.isAvailable()) return false;

    // Hidden trumps netDb.floodfillParticipant=true
    if (getContext().router().isHidden()) return false;

    String enabled = getContext().getProperty(PROP_FLOODFILL_PARTICIPANT, "auto");
    if ("true".equals(enabled)) return true;
    if ("false".equals(enabled)) return false;

    // auto from here down

    // Only if not shutting down...
    if (getContext().router().gracefulShutdownInProgress()) return false;

    // ARM ElG decrypt is too slow
    if (SystemVersion.isARM() || SystemVersion.isAndroid()) return false;

    if (getContext().getBooleanProperty(UDPTransport.PROP_LAPTOP_MODE)) return false;

    if (getContext().commSystem().isInBadCountry()) return false;
    String country = getContext().commSystem().getOurCountry();
    // anonymous proxy, satellite provider (not in bad country list)
    if ("a1".equals(country) || "a2".equals(country)) return false;

    // Only if up a while...
    if (getContext().router().getUptime() < MIN_UPTIME) return false;

    RouterInfo ri = getContext().router().getRouterInfo();
    if (ri == null) return false;
    char bw = ri.getBandwidthTier().charAt(0);
    // Only if class M, N, O, P, X
    if (bw != Router.CAPABILITY_BW64
        && bw != Router.CAPABILITY_BW128
        && bw != Router.CAPABILITY_BW256
        && bw != Router.CAPABILITY_BW512
        && bw != Router.CAPABILITY_BW_UNLIMITED) return false;

    // This list will not include ourselves...
    List<Hash> floodfillPeers = _facade.getFloodfillPeers();
    long now = getContext().clock().now();
    // We know none at all! Must be our turn...
    if (floodfillPeers == null || floodfillPeers.isEmpty()) {
      _lastChanged = now;
      return true;
    }

    // Only change status every so often
    boolean wasFF = _facade.floodfillEnabled();
    if (_lastChanged + MIN_CHANGE_DELAY > now) return wasFF;

    // This is similar to the qualification we do in FloodOnlySearchJob.runJob().
    // Count the "good" ff peers.
    //
    // Who's not good?
    // the unheard-from, unprofiled, failing, unreachable and banlisted ones.
    // We should hear from floodfills pretty frequently so set a 60m time limit.
    // If unprofiled we haven't talked to them in a long time.
    // We aren't contacting the peer directly, so banlist doesn't strictly matter,
    // but it's a bad sign, and we often banlist a peer before we fail it...
    //
    // Future: use Integration calculation
    //
    int ffcount = floodfillPeers.size();
    int failcount = 0;
    long before = now - 60 * 60 * 1000;
    for (Hash peer : floodfillPeers) {
      PeerProfile profile = getContext().profileOrganizer().getProfile(peer);
      if (profile == null
          || profile.getLastHeardFrom() < before
          || profile.getIsFailing()
          || getContext().banlist().isBanlisted(peer)
          || getContext().commSystem().wasUnreachable(peer)) failcount++;
    }

    if (wasFF) ffcount++;
    int good = ffcount - failcount;
    boolean happy = getContext().router().getRouterInfo().getCapabilities().indexOf('R') >= 0;
    // TODO - limit may still be too high
    // For reference, the avg lifetime job lag on my Pi is 6.
    // Should we consider avg. dropped ff jobs?
    RateStat lagStat = getContext().statManager().getRate("jobQueue.jobLag");
    RateStat queueStat = getContext().statManager().getRate("router.tunnelBacklog");
    happy = happy && lagStat.getRate(60 * 60 * 1000L).getAvgOrLifetimeAvg() < 25;
    happy = happy && queueStat.getRate(60 * 60 * 1000L).getAvgOrLifetimeAvg() < 5;
    // Only if we're pretty well integrated...
    happy = happy && _facade.getKnownRouters() >= 400;
    happy = happy && getContext().commSystem().countActivePeers() >= 50;
    happy = happy && getContext().tunnelManager().getParticipatingCount() >= 25;
    happy = happy && Math.abs(getContext().clock().getOffset()) < 10 * 1000;
    // We need an address and no introducers
    if (happy) {
      RouterAddress ra = getContext().router().getRouterInfo().getTargetAddress("SSU");
      if (ra == null) happy = false;
      else {
        if (ra.getOption("ihost0") != null) happy = false;
      }
    }

    double elG = 0;
    RateStat stat = getContext().statManager().getRate("crypto.elGamal.decrypt");
    if (stat != null) {
      Rate rate = stat.getRate(60 * 60 * 1000L);
      if (rate != null) {
        elG = rate.getAvgOrLifetimeAvg();
        happy = happy && elG <= 40.0d;
      }
    }

    if (_log.shouldLog(Log.DEBUG)) {
      final RouterContext rc = getContext();
      final String log =
          String.format(
              "FF criteria breakdown: happy=%b, capabilities=%s, maxLag=%d, known=%d, "
                  + "active=%d, participating=%d, offset=%d, ssuAddr=%s ElG=%f",
              happy,
              rc.router().getRouterInfo().getCapabilities(),
              rc.jobQueue().getMaxLag(),
              _facade.getKnownRouters(),
              rc.commSystem().countActivePeers(),
              rc.tunnelManager().getParticipatingCount(),
              Math.abs(rc.clock().getOffset()),
              rc.router().getRouterInfo().getTargetAddress("SSU").toString(),
              elG);
      _log.debug(log);
    }

    // Too few, and we're reachable, let's volunteer
    if (good < MIN_FF && happy) {
      if (!wasFF) {
        _lastChanged = now;
        _log.logAlways(
            Log.INFO,
            "Only " + good + " ff peers and we want " + MIN_FF + " so we are becoming floodfill");
      }
      return true;
    }

    // Too many, or we aren't reachable, let's stop
    if (good > MAX_FF || (good > MIN_FF && !happy)) {
      if (wasFF) {
        _lastChanged = now;
        _log.logAlways(
            Log.INFO,
            "Have "
                + good
                + " ff peers and we need only "
                + MIN_FF
                + " to "
                + MAX_FF
                + " so we are disabling floodfill; reachable? "
                + happy);
      }
      return false;
    }

    if (_log.shouldLog(Log.INFO))
      _log.info(
          "Have " + good + " ff peers, not changing, enabled? " + wasFF + "; reachable? " + happy);
    return wasFF;
  }