public bool SetI2P(string address)
{
address = address.ToLowerInvariant();
if (!address.EndsWith(".b32.i2p", StringComparison.Ordinal))
{
return(false);
}
var encoded = address.Substring(0, address.Length - ".b32.i2p".Length);
if (encoded.Length != 52)
{
return(false);
}
byte[] bytes;
try
{
bytes = Encoders.Base32.DecodeData(encoded + "====");
}
catch (FormatException)
{
return(false);
}
if (bytes.Length != ADDR_I2P_SIZE + 3)
{
return(false);
}
network = NetworkAddressType.I2P;
addr = bytes.SafeSubarray(0, ADDR_I2P_SIZE);
return(true);
}
public void SetLegacyIpv6(byte[] ipv6)
{
if (ipv6.Length != ADDR_IPV6_SIZE)
{
throw new ArgumentException("The received value is not a valid IPv6 byte array.", nameof(ipv6));
}
var skip = 0;
if (HasPrefix(ipv6, IPV4_IN_IPV6_PREFIX))
{
network = NetworkAddressType.IPv4;
skip = IPV4_IN_IPV6_PREFIX.Length;
}
else if (HasPrefix(ipv6, TORV2_IN_IPV6_PREFIX))
{
// TORv2-in-IPv6
network = NetworkAddressType.Onion;
skip = TORV2_IN_IPV6_PREFIX.Length;
}
else
{
// IPv6
network = NetworkAddressType.IPv6;
}
addr = ipv6.SafeSubarray(skip);
}
private bool SetTor(string address)
{
if (!address.EndsWith(".onion", StringComparison.Ordinal))
{
return(false);
}
byte[] bytes;
try
{
bytes = Encoders.Base32.DecodeData(address.Substring(0, address.Length - ".onion".Length));
}
catch (FormatException)
{
return(false);
}
if (bytes.Length == ADDR_TORV2_SIZE)
{
network = NetworkAddressType.Onion;
addr = bytes;
return(true);
}
else if (bytes.Length == ADDR_TORV3_SIZE + TORV3_ADDR_CHECKSUM_LEN + TORV3_ADDR_VERSION_LEN)
{
var version = bytes[bytes.Length - 1];
if (version != 3)
{
return(false);
}
var pubkey = bytes.SafeSubarray(0, ADDR_TORV3_SIZE);
var chksum = bytes.SafeSubarray(ADDR_TORV3_SIZE, TORV3_ADDR_CHECKSUM_LEN);
var calculatedChecksum = CalculateChecksum(pubkey);
if (!Utils.ArrayEqual(chksum, calculatedChecksum))
{
return(false);
}
network = NetworkAddressType.Onion;
addr = pubkey;
return(true);
}
return(false);
}
private bool SetNetFromBIP155Network(BIP155Network bip155Network, int length)
{
NetworkAddressType AssignIfCorrectSize(NetworkAddressType net, int expectedSize)
{
if (length != expectedSize)
{
throw new ArgumentException($"BIP155 {(BIP155Network)bip155Network} address is {length} bytes long. Expected length is {expectedSize} bytes.");
}
return(net);
}
switch (bip155Network)
{
case BIP155Network.IPv4:
network = AssignIfCorrectSize(NetworkAddressType.IPv4, ADDR_IPV4_SIZE);
break;
case BIP155Network.IPv6:
network = AssignIfCorrectSize(NetworkAddressType.IPv6, ADDR_IPV6_SIZE);
break;
case BIP155Network.TORv2:
network = AssignIfCorrectSize(NetworkAddressType.Onion, ADDR_TORV2_SIZE);
break;
case BIP155Network.TORv3:
network = AssignIfCorrectSize(NetworkAddressType.Onion, ADDR_TORV3_SIZE);
break;
case BIP155Network.I2P:
network = AssignIfCorrectSize(NetworkAddressType.I2P, ADDR_I2P_SIZE);
break;
case BIP155Network.Cjdns:
network = AssignIfCorrectSize(NetworkAddressType.Cjdns, ADDR_CJDNS_SIZE);
break;
default:
return(false);
}
return(true);
}
public NetworkAddress(EndPoint endPoint)
{
if (endPoint == null)
{
throw new ArgumentNullException(nameof(endPoint));
}
Endpoint = endPoint;
if (endPoint.IsTor())
{
network = NetworkAddressType.Onion;
}
else if (endPoint is IPEndPoint ip)
{
SetIp(ip.Address);
}
else
{
throw new NotSupportedException($"Unsupported endpoint of type {endPoint.GetType()}");
}
}
public virtual void ReadWrite(BitcoinStream stream)
{
var version = stream.ProtocolVersion ?? 0;
if (stream.Type == SerializationType.Disk)
{
stream.ReadWrite(ref version);
}
if (
stream.Type == SerializationType.Disk ||
(stream.ProtocolCapabilities.SupportTimeAddress && stream.Type != SerializationType.Hash))
{
// The only time we serialize a CAddress object without nTime is in
// the initial VERSION messages which contain two CAddress records.
// At that point, the serialization version is INIT_PROTO_VERSION.
// After the version handshake, serialization version is >=
// MIN_PEER_PROTO_VERSION and all ADDR messages are serialized with
// nTime.
stream.ReadWrite(ref nTime);
}
if ((version & AddrV2Format) != 0)
{
stream.ReadWriteAsVarInt(ref services);
}
else
{
stream.ReadWrite(ref services);
}
var useV2Format = stream.ProtocolVersion is {} protcocolVersion&& (protcocolVersion & AddrV2Format) != 0;
if (useV2Format)
{
if (stream.Serializing)
{
var bip155net = (byte)GetBIP155Network();
stream.ReadWrite(bip155net);
stream.ReadWriteAsVarString(ref addr);
}
else
{
byte n = 0;
stream.ReadWrite(ref n);
stream.ReadWriteAsVarString(ref addr);
if (SetNetFromBIP155Network((BIP155Network)n, addr.Length))
{
if (network == NetworkAddressType.IPv6)
{
if (HasPrefix(addr, IPV4_IN_IPV6_PREFIX) || HasPrefix(addr, TORV2_IN_IPV6_PREFIX))
{
// set to invalid because IPv4 and Torv2 should not be embeded in IPv6.
addr = IPV6_NONE;
network = NetworkAddressType.IPv6;
}
}
}
else
{
// set to invalid because IPv4 and Torv2 should not be embeded in IPv6.
addr = IPV6_NONE;
network = NetworkAddressType.IPv6;
}
}
}
else
{
if (stream.Serializing)
{
var localAddr = IsAddrV1Compatible ? SerializeV1Array() : IPV6_NONE;
stream.ReadWrite(ref localAddr);
}
else
{
var localAddr = new byte[ADDR_IPV6_SIZE];
stream.ReadWrite(ref localAddr);
SetLegacyIpv6(localAddr);
}
}
using (stream.BigEndianScope())
{
stream.ReadWrite(ref port);
}
}