public void RefreshConnectedPeers() { if (!_p2pNetworkConnector.IsRunning) { throw new P2PConnectorException(ErrorCodes.P2PNotReachable); } var getAddrMessage = new GetAddressMessage(_network); Broadcast(getAddrMessage); }
private async Task DiscoverNodesViaSeeds() { var dic = GetSeedNodes(_network).Select(s => new KeyValuePair <string, ServiceFlags>(s, ServiceFlags.NODE_NETWORK)); await ConnectToPeers(dic); var instance = PeersStore.Instance(); var currentIpAddress = instance.GetMyIpAddress(); var addrMessage = new AddrMessage(new CompactSize { Size = 1 }, _network); addrMessage.IpAddresses.Add(currentIpAddress); Broadcast(addrMessage); var getAddrMessage = new GetAddressMessage(_network); var getAddrLst = Broadcast(getAddrMessage); if (getAddrLst != null && getAddrLst.Any()) { foreach (var getAddr in getAddrLst) { var getAdrMsg = getAddr as AddrMessage; if (getAdrMsg == null) { continue; } _peersRepository.AddPeers(getAdrMsg.IpAddresses); } } var peers = _peersRepository.GetAll(); if (peers.Any()) { await DiscoverNodesViaStore(peers); } }
public Message Parse(byte[] payload) { if (payload == null) { throw new ArgumentNullException(nameof(payload)); } if (payload.Length < 24) { throw new ParseMessageException(ErrorCodes.InvalidCommandLength); } var header = payload.Take(40); // Extract the header. var startStringPayload = header.Take(4); var network = Networks.MainNet; if (startStringPayload.SequenceEqual(new byte[] { 0xf9, 0xbe, 0xb4, 0xd9 })) { network = Networks.MainNet; } else if (startStringPayload.SequenceEqual(new byte[] { 0x0b, 0x11, 0x09, 0x07 })) { network = Networks.TestNet; } else if (startStringPayload.SequenceEqual(new byte[] { 0xfa, 0xbf, 0xb5, 0xda })) { network = Networks.RegTest; } else { throw new ParseMessageException(ErrorCodes.InvalidStartString); } var commandNamePayload = header.Skip(4).Take(12).Where(b => b != 0x00).ToArray(); var commandName = System.Text.Encoding.ASCII.GetString(commandNamePayload); var ipv6 = header.Skip(16).Take(16); var payloadSizePayload = header.Skip(32).Take(4).ToArray(); var payloadSize = BitConverter.ToInt32(payloadSizePayload, 0); var checkSum = header.Skip(36).Take(4); byte[] contentPayload = null; if (payloadSize > 0) { contentPayload = payload.Skip(40).Take(payloadSize).ToArray(); SHA256 mySHA256 = SHA256.Create(); var newCheckSum = mySHA256.ComputeHash(mySHA256.ComputeHash(contentPayload)).Take(4); if (!newCheckSum.SequenceEqual(checkSum)) { throw new ParseMessageException(ErrorCodes.InvalidChecksum); } } else if (!checkSum.SequenceEqual(new byte[] { 0x5d, 0xf6, 0xe0, 0xe2 })) { throw new ParseMessageException(ErrorCodes.InvalidChecksum); } if (!Constants.MessageNameLst.Contains(commandName)) { throw new ParseMessageException(ErrorCodes.InvalidCommandName); } Message message = null; if (commandName == Constants.MessageNames.Ping) { var nonce = BitConverter.ToUInt64(contentPayload, 0); message = new PingMessage(nonce, network); } else if (commandName == Constants.MessageNames.Addr) { message = AddrMessage.Deserialize(contentPayload, network); } else if (commandName == Constants.MessageNames.Version) { message = VersionMessage.Deserialize(contentPayload, network); } else if (commandName == Constants.MessageNames.Verack) { message = new VerackMessage(network); } else if (commandName == Constants.MessageNames.GetAddr) { message = new GetAddressMessage(network); } else if (commandName == Constants.MessageNames.Inventory) { message = InventoryMessage.Deserialize(contentPayload, network); } else if (commandName == Constants.MessageNames.Transaction) { message = TransactionMessage.Deserialize(contentPayload, network, Transactions.TransactionTypes.NoneCoinbase); } else if (commandName == Constants.MessageNames.Pong) { var nonce = BitConverter.ToUInt64(contentPayload, 0); message = new PongMessage(nonce, network); } else if (commandName == Constants.MessageNames.MemPool) { message = new MemPoolMessage(network); } else if (commandName == Constants.MessageNames.GetData) { message = GetDataMessage.Deserialize(contentPayload, network); } else if (commandName == Constants.MessageNames.Block) { message = BlockMessage.Deserialize(contentPayload, network); } else if (commandName == Constants.MessageNames.GetBlocks) { message = GetBlocksMessage.Deserialize(contentPayload, network); } else if (commandName == Constants.MessageNames.NotFound) { message = NotFoundMessage.Deserialize(contentPayload, network); } message.MessageHeader.Ipv6 = ipv6.ToArray(); return(message); }
private Message Launch(PeerConnector peerConnector, GetAddressMessage message) { var payload = peerConnector.Execute(message.Serialize()); // S : GETADDR. return(_messageParser.Parse(payload.ToArray())); }