// Retrieve the friend's connected S2 node address. Returns null if not found
public string searchForRelay()
{
string hostname = null;
Presence presence = PresenceList.getPresenceByAddress(walletAddress);
if (presence == null)
{
return(hostname);
}
byte[] wallet = presence.wallet;
lock (presence)
{
// Go through each presence address searching for C nodes
foreach (PresenceAddress addr in presence.addresses)
{
// Only check Client nodes
if (addr.type == 'C')
{
// We have a potential candidate here, store it
hostname = addr.address;
string[] hostname_split = hostname.Split(':');
if (hostname_split.Count() == 2 && NetworkUtils.validateIP(hostname_split[0]))
{
// client is directly connectable
break;
}
// find a relay node
Presence s2presence = PresenceList.getPresenceByDeviceId(hostname);
if (s2presence != null)
{
PresenceAddress s2addr = s2presence.addresses.Find(x => x.device == hostname);
if (s2addr != null)
{
// We found the friend's connected s2 node
hostname = s2addr.address;
wallet = s2presence.wallet;
break;
}
}
}
}
}
// Store the last relay ip and wallet for this friend
relayIP = hostname;
relayWallet = wallet;
// Finally, return the ip address of the node
return(relayIP);
}
public void start(Socket socket = null)
{
if (fullyStopped)
{
Logging.error("Can't start a fully stopped RemoteEndpoint");
return;
}
if (running)
{
return;
}
if (socket != null)
{
clientSocket = socket;
}
if (clientSocket == null)
{
Logging.error("Could not start NetworkRemoteEndpoint, socket is null");
return;
}
prepareSocket(clientSocket);
remoteIP = (IPEndPoint)clientSocket.RemoteEndPoint;
address = remoteIP.Address.ToString();
fullAddress = address + ":" + remoteIP.Port;
presence = null;
presenceAddress = null;
connectionStartTime = Clock.getTimestamp();
lock (subscribedAddresses)
{
subscribedAddresses.Clear();
}
lastDataReceivedTime = Clock.getTimestamp();
lastDataSentTime = Clock.getTimestamp();
state = RemoteEndpointState.Established;
timeDifference = 0;
timeSyncComplete = false;
timeSyncs.Clear();
running = true;
// Abort all related threads
if (recvThread != null)
{
recvThread.Abort();
recvThread = null;
}
if (sendThread != null)
{
sendThread.Abort();
sendThread = null;
}
if (parseThread != null)
{
parseThread.Abort();
parseThread = null;
}
try
{
TLC = new ThreadLiveCheck();
// Start receive thread
recvThread = new Thread(new ThreadStart(recvLoop));
recvThread.Name = "Network_Remote_Endpoint_Receive_Thread";
recvThread.Start();
// Start send thread
sendThread = new Thread(new ThreadStart(sendLoop));
sendThread.Name = "Network_Remote_Endpoint_Send_Thread";
sendThread.Start();
// Start parse thread
parseThread = new Thread(new ThreadStart(parseLoop));
parseThread.Name = "Network_Remote_Endpoint_Parse_Thread";
parseThread.Start();
}
catch (Exception e)
{
Logging.error("Exception start remote endpoint: {0}", e.Message);
}
}
public static void handleGetKeepAlives(byte[] data, RemoteEndpoint endpoint)
{
using (MemoryStream m = new MemoryStream(data))
{
using (BinaryReader reader = new BinaryReader(m))
{
int ka_count = (int)reader.ReadIxiVarUInt();
int max_ka_per_chunk = CoreConfig.maximumKeepAlivesPerChunk;
for (int i = 0; i < ka_count;)
{
using (MemoryStream mOut = new MemoryStream(max_ka_per_chunk * 570))
{
using (BinaryWriter writer = new BinaryWriter(mOut))
{
int next_ka_count;
if (ka_count - i > max_ka_per_chunk)
{
next_ka_count = max_ka_per_chunk;
}
else
{
next_ka_count = ka_count - i;
}
writer.WriteIxiVarInt(next_ka_count);
for (int j = 0; j < next_ka_count && i < ka_count; j++)
{
i++;
long in_rollback_pos = reader.BaseStream.Position;
long out_rollback_len = mOut.Length;
if (m.Position == m.Length)
{
break;
}
int address_len = (int)reader.ReadIxiVarUInt();
byte[] address = reader.ReadBytes(address_len);
int device_len = (int)reader.ReadIxiVarUInt();
byte[] device = reader.ReadBytes(device_len);
Presence p = PresenceList.getPresenceByAddress(address);
if (p == null)
{
Logging.info("I don't have presence: " + Base58Check.Base58CheckEncoding.EncodePlain(address));
continue;
}
PresenceAddress pa = p.addresses.Find(x => x.device.SequenceEqual(device));
if (pa == null)
{
Logging.info("I don't have presence address: " + Base58Check.Base58CheckEncoding.EncodePlain(address));
continue;
}
byte[] ka_bytes = pa.getKeepAliveBytes(address);
byte[] ka_len = IxiVarInt.GetIxiVarIntBytes(ka_bytes.Length);
writer.Write(ka_len);
writer.Write(ka_bytes);
if (mOut.Length > CoreConfig.maxMessageSize)
{
reader.BaseStream.Position = in_rollback_pos;
mOut.SetLength(out_rollback_len);
i--;
break;
}
}
}
endpoint.sendData(ProtocolMessageCode.keepAlivesChunk, mOut.ToArray(), null);
}
}
}
}
}
