protected boolean sendTunnelMessage(DHTTransportContact target, byte[] data) {
try {
dht.getTransport()
.writeTransfer(
new DHTTransportProgressListener() {
public void reportSize(long size) {}
public void reportActivity(String str) {}
public void reportCompleteness(int percent) {}
},
target,
transfer_handler_key,
new byte[0],
data,
TUNNEL_TIMEOUT);
return (true);
} catch (DHTTransportException e) {
// log(e); timeout most likely
return (false);
}
}
private void updateStats(int record_type) {
long current_d_received = gm_stats.getTotalDataBytesReceived();
long current_p_received = gm_stats.getTotalProtocolBytesReceived();
long current_d_sent = gm_stats.getTotalDataBytesSent();
long current_p_sent = gm_stats.getTotalProtocolBytesSent();
long current_dht_sent = 0;
long current_dht_received = 0;
DHT[] dhts = getDHTs();
if (dhts != null) {
for (DHT dht : dhts) {
DHTTransportStats dht_stats = dht.getTransport().getStats();
current_dht_sent += dht_stats.getBytesSent();
current_dht_received += dht_stats.getBytesReceived();
}
}
write(
record_type,
new long[] {
(current_p_sent - ss_p_sent),
(current_d_sent - ss_d_sent),
(current_p_received - ss_p_received),
(current_d_received - ss_d_received),
(current_dht_sent - ss_dht_sent),
(current_dht_received - ss_dht_received)
});
}
public void setRendezvous(DHTTransportContact target, DHTTransportContact rendezvous) {
explicit_rendezvous_map.put(target.getAddress(), rendezvous);
if (target.getAddress().equals(dht.getTransport().getLocalContact().getAddress())) {
publish(true);
}
}
protected void findContacts() {
DHTTransportContact[] reachables = dht.getTransport().getReachableContacts();
for (int i = 0; i < reachables.length; i++) {
DHTTransportContact contact = reachables[i];
byte[] address = contact.getAddress().getAddress().getAddress();
if (tried_bloom == null || tried_bloom.getEntryCount() > 500) {
tried_bloom = BloomFilterFactory.createAddOnly(4096);
}
if (!tried_bloom.contains(address)) {
tried_bloom.add(address);
synchronized (pending_contacts) {
potentialPing ping =
new potentialPing(
contact,
DHTNetworkPositionManager.estimateRTT(
contact.getNetworkPositions(),
dht.getTransport().getLocalContact().getNetworkPositions()));
pending_contacts.add(0, ping);
if (pending_contacts.size() > 60) {
pending_contacts.removeLast();
}
}
}
}
}
protected DHTTransportUDPContact decodeContact(byte[] bytes) {
try {
ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
DataInputStream dis = new DataInputStream(bais);
return ((DHTTransportUDPContact) dht.getTransport().importContact(dis));
} catch (Throwable e) {
log(e);
return (null);
}
}
public Map sendMessage(InetSocketAddress rendezvous, InetSocketAddress target, Map message) {
try {
DHTTransportUDP transport = (DHTTransportUDP) dht.getTransport();
DHTTransportUDPContact rend_contact =
transport.importContact(rendezvous, transport.getProtocolVersion());
DHTTransportUDPContact target_contact =
transport.importContact(target, transport.getProtocolVersion());
Map result = sendPunch(rend_contact, target_contact, message, true);
return (result);
} catch (Throwable e) {
Debug.printStackTrace(e);
return (null);
}
}
protected byte[] sendRequest(DHTTransportContact target, byte[] data, int timeout) {
try {
return (dht.getTransport()
.writeReadTransfer(
new DHTTransportProgressListener() {
public void reportSize(long size) {}
public void reportActivity(String str) {}
public void reportCompleteness(int percent) {}
},
target,
transfer_handler_key,
data,
timeout));
} catch (DHTTransportException e) {
// log(e); timeout most likely
return (null);
}
}
public Map punch(
String reason,
InetSocketAddress[] target,
DHTTransportContact[] rendezvous_used,
Map originator_client_data) {
try {
DHTTransportUDP transport = (DHTTransportUDP) dht.getTransport();
DHTTransportUDPContact contact =
transport.importContact(target[0], transport.getProtocolVersion());
Map result = punch(reason, contact, rendezvous_used, originator_client_data);
target[0] = contact.getTransportAddress();
return (result);
} catch (Throwable e) {
Debug.printStackTrace(e);
return (null);
}
}
private void sessionStart() {
OverallStatsImpl stats = (OverallStatsImpl) StatsFactory.getStats();
synchronized (this) {
if (closing) {
return;
}
boolean enabled = COConfigurationManager.getBooleanParameter("long.term.stats.enable");
if (active || !enabled) {
return;
}
active = true;
long[] snap = stats.getLastSnapshot();
ss_d_received = gm_stats.getTotalDataBytesReceived();
ss_p_received = gm_stats.getTotalProtocolBytesReceived();
ss_d_sent = gm_stats.getTotalDataBytesSent();
ss_p_sent = gm_stats.getTotalProtocolBytesSent();
ss_dht_sent = 0;
ss_dht_received = 0;
if (core.isStarted()) {
DHT[] dhts = getDHTs();
if (dhts != null) {
for (DHT dht : dhts) {
DHTTransportStats dht_stats = dht.getTransport().getStats();
ss_dht_sent += dht_stats.getBytesSent();
ss_dht_received += dht_stats.getBytesReceived();
}
}
}
st_p_sent = snap[0] + (ss_p_sent - snap[6]);
st_d_sent = snap[1] + (ss_d_sent - snap[7]);
st_p_received = snap[2] + (ss_p_received - snap[8]);
st_d_received = snap[3] + (ss_d_received - snap[9]);
st_dht_sent = snap[4] + (ss_dht_sent - snap[10]);
st_dht_received = snap[5] + (ss_dht_received - snap[11]);
write(
RT_SESSION_START,
new long[] {
st_p_sent, st_d_sent, st_p_received, st_d_received, st_dht_sent, st_dht_received
});
if (event == null) { // should always be null but hey ho
event =
SimpleTimer.addPeriodicEvent(
"LongTermStats",
MIN_IN_MILLIS,
new TimerEventPerformer() {
public void perform(TimerEvent event) {
updateStats();
}
});
}
}
}
private void start() {
synchronized (this) {
if (started) {
return;
}
started = true;
}
N_3072 =
fromHex(
"FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1 29024E08"
+ "8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD EF9519B3 CD3A431B"
+ "302B0A6D F25F1437 4FE1356D 6D51C245 E485B576 625E7EC6 F44C42E9"
+ "A637ED6B 0BFF5CB6 F406B7ED EE386BFB 5A899FA5 AE9F2411 7C4B1FE6"
+ "49286651 ECE45B3D C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8"
+ "FD24CF5F 83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D"
+ "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B E39E772C"
+ "180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9 DE2BCBF6 95581718"
+ "3995497C EA956AE5 15D22618 98FA0510 15728E5A 8AAAC42D AD33170D"
+ "04507A33 A85521AB DF1CBA64 ECFB8504 58DBEF0A 8AEA7157 5D060C7D"
+ "B3970F85 A6E1E4C7 ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226"
+ "1AD2EE6B F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C"
+ "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31 43DB5BFC"
+ "E0FD108E 4B82D120 A93AD2CA FFFFFFFF FFFFFFFF");
G_3072 = BigInteger.valueOf(5);
try {
PluginInterface dht_pi = core.getPluginManager().getPluginInterfaceByClass(DHTPlugin.class);
if (dht_pi == null) {
throw (new Exception("DHT Plugin not found"));
}
DHTPlugin dht_plugin = (DHTPlugin) dht_pi.getPlugin();
if (!dht_plugin.isEnabled()) {
throw (new Exception("DHT Plugin is disabled"));
}
DHT[] dhts = dht_plugin.getDHTs();
List<DHTNATPuncher> punchers = new ArrayList<DHTNATPuncher>();
for (DHT dht : dhts) {
int net = dht.getTransport().getNetwork();
if (net == DHT.NW_MAIN) {
DHTNATPuncher primary_puncher = dht.getNATPuncher();
if (primary_puncher != null) {
punchers.add(primary_puncher);
nat_punchers_ipv4.add(primary_puncher);
for (int i = 1; i <= 2; i++) {
DHTNATPuncher puncher = primary_puncher.getSecondaryPuncher();
punchers.add(puncher);
nat_punchers_ipv4.add(puncher);
}
}
} else if (net == DHT.NW_MAIN_V6) {
/*
* no point in this atm as we don't support v6 tunnels
DHTNATPuncher puncher = dht.getNATPuncher();
if ( puncher != null ){
punchers.add( puncher );
nat_punchers_ipv6.add( puncher );
puncher = puncher.getSecondaryPuncher();
punchers.add( puncher );
nat_punchers_ipv6.add( puncher );
}
*/
}
}
if (punchers.size() == 0) {
throw (new Exception("No suitable DHT instances available"));
}
for (DHTNATPuncher p : punchers) {
p.forceActive(true);
p.addListener(
new DHTNATPuncherListener() {
public void rendezvousChanged(DHTTransportContact rendezvous) {
System.out.println("active: " + rendezvous.getString());
synchronized (PairingManagerTunnelHandler.this) {
if (update_event == null) {
update_event =
SimpleTimer.addEvent(
"PMT:defer",
SystemTime.getOffsetTime(15 * 1000),
new TimerEventPerformer() {
public void perform(TimerEvent event) {
synchronized (PairingManagerTunnelHandler.this) {
update_event = null;
}
System.out.println(" updating");
manager.updateNeeded();
};
});
}
}
}
});
}
core.getNATTraverser()
.registerHandler(
new NATTraversalHandler() {
private Map<Long, Object[]> server_map =
new LinkedHashMap<Long, Object[]>(10, 0.75f, true) {
protected boolean removeEldestEntry(Map.Entry<Long, Object[]> eldest) {
return size() > 10;
}
};
public int getType() {
return (NATTraverser.TRAVERSE_REASON_PAIR_TUNNEL);
}
public String getName() {
return ("Pairing Tunnel");
}
public Map process(InetSocketAddress originator, Map data) {
if (SRP_VERIFIER == null || !active) {
return (null);
}
boolean good_request = false;
try {
Map result = new HashMap();
Long session = (Long) data.get("sid");
if (session == null) {
return (null);
}
InetAddress tunnel_originator;
try {
tunnel_originator = InetAddress.getByAddress((byte[]) data.get("origin"));
} catch (Throwable e) {
Debug.out("originator decode failed: " + data);
return (null);
}
System.out.println(
"PairManagerTunnelHander: incoming message - session="
+ session
+ ", payload="
+ data
+ " from "
+ tunnel_originator
+ " via "
+ originator);
SRP6Server server;
BigInteger B;
synchronized (server_map) {
Object[] entry = server_map.get(session);
if (entry == null) {
long diff = SystemTime.getMonotonousTime() - last_server_create_time;
if (diff < 5000) {
try {
long sleep = 5000 - diff;
System.out.println("Sleeping for " + sleep + " before starting srp");
Thread.sleep(sleep);
} catch (Throwable e) {
}
}
server = new SRP6Server();
server.init(
N_3072,
G_3072,
SRP_VERIFIER,
new SHA256Digest(),
RandomUtils.SECURE_RANDOM);
B = server.generateServerCredentials();
server_map.put(session, new Object[] {server, B});
last_server_create_time = SystemTime.getMonotonousTime();
total_servers++;
} else {
server = (SRP6Server) entry[0];
B = (BigInteger) entry[1];
}
}
Long op = (Long) data.get("op");
if (op == 1) {
result.put("op", 2);
result.put("s", SRP_SALT);
result.put("b", B.toByteArray());
good_request = true;
if (data.containsKey("test")) {
manager.recordRequest(
"SRP Test", originator.getAddress().getHostAddress(), true);
}
} else if (op == 3) {
boolean log_error = true;
try {
long diff = SystemTime.getMonotonousTime() - last_server_agree_time;
if (diff < 5000) {
try {
long sleep = 5000 - diff;
System.out.println("Sleeping for " + sleep + " before completing srp");
Thread.sleep(sleep);
} catch (Throwable e) {
}
}
BigInteger A = new BigInteger((byte[]) data.get("a"));
BigInteger serverS = server.calculateSecret(A);
byte[] shared_secret = serverS.toByteArray();
Cipher decipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
byte[] key = new byte[16];
System.arraycopy(shared_secret, 0, key, 0, 16);
SecretKeySpec secret = new SecretKeySpec(key, "AES");
decipher.init(
Cipher.DECRYPT_MODE,
secret,
new IvParameterSpec((byte[]) data.get("enc_iv")));
byte[] dec = decipher.doFinal((byte[]) data.get("enc_data"));
String json_str = new String(dec, "UTF-8");
if (!json_str.startsWith("{")) {
log_error = false;
throw (new Exception("decode failed"));
}
JSONObject dec_json = (JSONObject) JSONUtils.decodeJSON(json_str);
String tunnel_url = (String) dec_json.get("url");
String service_id = new String((byte[]) data.get("service"), "UTF-8");
String endpoint_url = (String) dec_json.get("endpoint");
boolean ok =
createTunnel(
tunnel_originator,
session,
service_id,
secret,
tunnel_url,
endpoint_url);
result.put("op", 4);
result.put("status", ok ? "ok" : "failed");
good_request = true;
} catch (Throwable e) {
result.put("op", 4);
result.put("status", "failed");
// filter usual errors on bad agreement
if (e instanceof BadPaddingException
|| e instanceof IllegalBlockSizeException) {
log_error = false;
}
if (log_error) {
e.printStackTrace();
}
} finally {
last_server_agree_time = SystemTime.getMonotonousTime();
}
}
return (result);
} finally {
if (!good_request) {
manager.recordRequest("SRP", originator.getAddress().getHostAddress(), false);
}
}
}
});
SimpleTimer.addPeriodicEvent(
"pm:tunnel:stats",
30 * 1000,
new TimerEventPerformer() {
public void perform(TimerEvent event) {
synchronized (tunnels) {
if (tunnels.size() > 0) {
System.out.println("PairTunnels: " + tunnels.size());
for (PairManagerTunnel t : tunnels.values()) {
System.out.println("\t" + t.getString());
}
}
}
}
});
} catch (Throwable e) {
Debug.out(e);
init_fail = Debug.getNestedExceptionMessage(e);
manager.updateSRPState();
}
}
protected void publishSupport() {
DHTTransport transport = dht.getTransport();
if (TESTING || !transport.isReachable()) {
DHTTransportContact local_contact = transport.getLocalContact();
// see if the rendezvous has failed and therefore we are required to find a new one
boolean force =
rendezvous_target != null
&& failed_rendezvous.containsKey(rendezvous_target.getAddress());
if (rendezvous_local_contact != null && !force) {
if (local_contact.getAddress().equals(rendezvous_local_contact.getAddress())) {
// already running for the current local contact
return;
}
}
DHTTransportContact explicit =
(DHTTransportContact) explicit_rendezvous_map.get(local_contact.getAddress());
if (explicit != null) {
try {
pub_mon.enter();
rendezvous_local_contact = local_contact;
rendezvous_target = explicit;
runRendezvous();
} finally {
pub_mon.exit();
}
} else {
final DHTTransportContact[] new_rendezvous_target = {null};
DHTTransportContact[] reachables = dht.getTransport().getReachableContacts();
int reachables_tried = 0;
int reachables_skipped = 0;
final Semaphore sem = plugin_interface.getUtilities().getSemaphore();
for (int i = 0; i < reachables.length; i++) {
DHTTransportContact contact = reachables[i];
try {
pub_mon.enter();
// see if we've found a good one yet
if (new_rendezvous_target[0] != null) {
break;
}
// skip any known bad ones
if (failed_rendezvous.containsKey(contact.getAddress())) {
reachables_skipped++;
sem.release();
continue;
}
} finally {
pub_mon.exit();
}
if (i > 0) {
try {
Thread.sleep(1000);
} catch (Throwable e) {
}
}
reachables_tried++;
contact.sendPing(
new DHTTransportReplyHandlerAdapter() {
public void pingReply(DHTTransportContact ok_contact) {
trace("Punch:" + ok_contact.getString() + " OK");
try {
pub_mon.enter();
if (new_rendezvous_target[0] == null) {
new_rendezvous_target[0] = ok_contact;
}
} finally {
pub_mon.exit();
sem.release();
}
}
public void failed(DHTTransportContact failed_contact, Throwable e) {
try {
trace("Punch:" + failed_contact.getString() + " Failed");
} finally {
sem.release();
}
}
});
}
for (int i = 0; i < reachables.length; i++) {
sem.reserve();
try {
pub_mon.enter();
if (new_rendezvous_target[0] != null) {
rendezvous_target = new_rendezvous_target[0];
rendezvous_local_contact = local_contact;
log(
"Rendezvous found: "
+ rendezvous_local_contact.getString()
+ " -> "
+ rendezvous_target.getString());
runRendezvous();
break;
}
} finally {
pub_mon.exit();
}
}
if (new_rendezvous_target[0] == null) {
log(
"No rendezvous found: candidates="
+ reachables.length
+ ",tried="
+ reachables_tried
+ ",skipped="
+ reachables_skipped);
try {
pub_mon.enter();
rendezvous_local_contact = null;
rendezvous_target = null;
} finally {
pub_mon.exit();
}
}
}
} else {
try {
pub_mon.enter();
rendezvous_local_contact = null;
rendezvous_target = null;
} finally {
pub_mon.exit();
}
}
}
protected DHTTransportContact getRendezvous(String reason, DHTTransportContact target) {
DHTTransportContact explicit =
(DHTTransportContact) explicit_rendezvous_map.get(target.getAddress());
if (explicit != null) {
return (explicit);
}
byte[] key = getPublishKey(target);
final DHTTransportValue[] result_value = {null};
final Semaphore sem = plugin_interface.getUtilities().getSemaphore();
dht.get(
key,
reason + ": lookup for '" + target.getString() + "'",
(byte) 0,
1,
RENDEZVOUS_LOOKUP_TIMEOUT,
false,
true,
new DHTOperationAdapter() {
public void read(DHTTransportContact contact, DHTTransportValue value) {
result_value[0] = value;
sem.release();
}
public void complete(boolean timeout) {
sem.release();
}
});
sem.reserve();
DHTTransportContact result = null;
if (result_value[0] != null) {
byte[] bytes = result_value[0].getValue();
try {
ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
DataInputStream dis = new DataInputStream(bais);
byte version = dis.readByte();
if (version != 0) {
throw (new Exception("Unsupported rendezvous version '" + version + "'"));
}
result = dht.getTransport().importContact(dis);
} catch (Throwable e) {
log(e);
}
}
log(
"Lookup of rendezvous for "
+ target.getString()
+ " -> "
+ (result == null ? "None" : result.getString()));
return (result);
}
public void start() {
if (started) {
return;
}
started = true;
DHTTransport transport = dht.getTransport();
transport.addListener(
new DHTTransportListener() {
public void localContactChanged(DHTTransportContact local_contact) {
publish(false);
}
public void currentAddress(String address) {}
public void reachabilityChanged(boolean reacheable) {
publish(false);
}
});
transport.registerTransferHandler(
transfer_handler_key,
new DHTTransportTransferHandler() {
public String getName() {
return ("NAT Traversal");
}
public byte[] handleRead(DHTTransportContact originator, byte[] key) {
return (null);
}
public byte[] handleWrite(DHTTransportContact originator, byte[] key, byte[] value) {
return (receiveRequest((DHTTransportUDPContact) originator, value));
}
});
timer.addPeriodicEvent(
REPUBLISH_TIME_MIN,
new UTTimerEventPerformer() {
public void perform(UTTimerEvent event) {
publish(false);
}
});
timer.addPeriodicEvent(
RENDEZVOUS_SERVER_TIMEOUT / 2,
new UTTimerEventPerformer() {
public void perform(UTTimerEvent event) {
long now = plugin_interface.getUtilities().getCurrentSystemTime();
try {
server_mon.enter();
Iterator it = rendezvous_bindings.values().iterator();
while (it.hasNext()) {
Object[] entry = (Object[]) it.next();
long time = ((Long) entry[1]).longValue();
boolean removed = false;
if (time > now) {
// clock change, easiest approach is to remove it
it.remove();
removed = true;
} else if (now - time > RENDEZVOUS_SERVER_TIMEOUT) {
// timeout
it.remove();
removed = true;
}
if (removed) {
log(
"Rendezvous "
+ ((DHTTransportContact) entry[0]).getString()
+ " removed due to inactivity");
}
}
} finally {
server_mon.exit();
}
}
});
publish(false);
}