/**
* Send a block of encoded bytes to a peer. This is called by send, and by
* IncomingPacketFilter.processOutgoing(..).
*
* @param blockToSend The data block to send.
* @param destination The peer to send it to.
*/
public void sendPacket(byte[] blockToSend, Peer destination, boolean allowLocalAddresses)
throws LocalAddressException {
assert (blockToSend != null);
if (!_active) {
Logger.error(this, "Trying to send packet but no longer active");
// It is essential that for recording accurate AddressTracker data that we don't send any more
// packets after shutdown.
return;
}
// there should be no DNS needed here, but go ahead if we can, but complain doing it
if (destination.getAddress(false, allowLocalAddresses) == null) {
Logger.error(
this,
"Tried sending to destination without pre-looked up IP address(needs a real Peer.getHostname()): null:"
+ destination.getPort(),
new Exception("error"));
if (destination.getAddress(true, allowLocalAddresses) == null) {
Logger.error(
this,
"Tried sending to bad destination address: null:" + destination.getPort(),
new Exception("error"));
return;
}
}
if (_dropProbability > 0) {
if (dropRandom.nextInt() % _dropProbability == 0) {
Logger.normal(this, "DROPPED: " + _sock.getLocalPort() + " -> " + destination.getPort());
return;
}
}
InetAddress address = destination.getAddress(false, allowLocalAddresses);
assert (address != null);
int port = destination.getPort();
DatagramPacket packet = new DatagramPacket(blockToSend, blockToSend.length);
packet.setAddress(address);
packet.setPort(port);
try {
_sock.send(packet);
tracker.sentPacketTo(destination);
collector.addInfo(address + ":" + port, 0, blockToSend.length + UDP_HEADERS_LENGTH);
if (logMINOR)
Logger.minor(
this, "Sent packet length " + blockToSend.length + " to " + address + ':' + port);
} catch (IOException e) {
if (packet.getAddress() instanceof Inet6Address) {
Logger.normal(
this, "Error while sending packet to IPv6 address: " + destination + ": " + e, e);
} else {
Logger.error(this, "Error while sending packet to " + destination + ": " + e, e);
}
}
}
