/** Handle an FNPRoutedRejected message. */
private boolean handleRoutedRejected(Message m) {
long id = m.getLong(DMT.UID);
Long lid = Long.valueOf(id);
RoutedContext rc = routedContexts.get(lid);
if (rc == null) {
// Gah
Logger.error(this, "Unrecognized FNPRoutedRejected");
return false; // locally originated??
}
short htl = rc.lastHtl;
if (rc.source != null) htl = rc.source.decrementHTL(htl);
short ohtl = m.getShort(DMT.HTL);
if (ohtl < htl) htl = ohtl;
if (htl == 0) {
// Equivalent to DNF.
// Relay.
if (rc.source != null) {
try {
rc.source.sendAsync(
DMT.createFNPRoutedRejected(id, (short) 0), null, nodeStats.routedMessageCtr);
} catch (NotConnectedException e) {
// Ouch.
Logger.error(this, "Unable to relay probe DNF: peer disconnected: " + rc.source);
}
}
} else {
// Try routing to the next node
forward(rc.msg, id, rc.source, htl, rc.msg.getDouble(DMT.TARGET_LOCATION), rc, rc.identity);
}
return true;
}
/**
* Handle a routed-to-a-specific-node message.
*
* @param m
* @return False if we want the message put back on the queue.
*/
boolean handleRouted(Message m, PeerNode source) {
if (logMINOR) Logger.minor(this, "handleRouted(" + m + ')');
long id = m.getLong(DMT.UID);
Long lid = Long.valueOf(id);
short htl = m.getShort(DMT.HTL);
byte[] identity = ((ShortBuffer) m.getObject(DMT.NODE_IDENTITY)).getData();
if (source != null) htl = source.decrementHTL(htl);
RoutedContext ctx;
ctx = routedContexts.get(lid);
if (ctx != null) {
try {
source.sendAsync(DMT.createFNPRoutedRejected(id, htl), null, nodeStats.routedMessageCtr);
} catch (NotConnectedException e) {
if (logMINOR) Logger.minor(this, "Lost connection rejecting " + m);
}
return true;
}
ctx = new RoutedContext(m, source, identity);
synchronized (routedContexts) {
routedContexts.put(lid, ctx);
}
// source == null => originated locally, keep full htl
double target = m.getDouble(DMT.TARGET_LOCATION);
if (logMINOR)
Logger.minor(this, "id " + id + " from " + source + " htl " + htl + " target " + target);
if (Math.abs(node.lm.getLocation() - target) <= Double.MIN_VALUE) {
if (logMINOR)
Logger.minor(this, "Dispatching " + m.getSpec() + " on " + node.getDarknetPortNumber());
// Handle locally
// Message type specific processing
dispatchRoutedMessage(m, source, id);
return true;
} else if (htl == 0) {
Message reject = DMT.createFNPRoutedRejected(id, (short) 0);
if (source != null)
try {
source.sendAsync(reject, null, nodeStats.routedMessageCtr);
} catch (NotConnectedException e) {
if (logMINOR) Logger.minor(this, "Lost connection rejecting " + m);
}
return true;
} else {
return forward(m, id, source, htl, target, ctx, identity);
}
}
private boolean forward(
Message m,
long id,
PeerNode pn,
short htl,
double target,
RoutedContext ctx,
byte[] targetIdentity) {
if (logMINOR) Logger.minor(this, "Should forward");
// Forward
m = preForward(m, htl);
while (true) {
PeerNode next = node.peers.getByIdentity(targetIdentity);
if (next != null && !next.isConnected()) {
Logger.error(this, "Found target but disconnected!: " + next);
next = null;
}
if (next == null)
next =
node.peers.closerPeer(
pn, ctx.routedTo, target, true, node.isAdvancedModeEnabled(), -1, null, null, htl);
if (logMINOR) Logger.minor(this, "Next: " + next + " message: " + m);
if (next != null) {
// next is connected, or at least has been => next.getPeer() CANNOT be null.
if (logMINOR)
Logger.minor(this, "Forwarding " + m.getSpec() + " to " + next.getPeer().getPort());
ctx.addSent(next);
try {
next.sendAsync(m, null, nodeStats.routedMessageCtr);
} catch (NotConnectedException e) {
continue;
}
} else {
if (logMINOR)
Logger.minor(
this, "Reached dead end for " + m.getSpec() + " on " + node.getDarknetPortNumber());
// Reached a dead end...
Message reject = DMT.createFNPRoutedRejected(id, htl);
if (pn != null)
try {
pn.sendAsync(reject, null, nodeStats.routedMessageCtr);
} catch (NotConnectedException e) {
Logger.error(this, "Cannot send reject message back to source " + pn);
return true;
}
}
return true;
}
}
