1; // extensions length
public byte[] Encode()
{
var size = MinEncodedSize;
if (ExtensionIds != null)
{
foreach (var extensionId in ExtensionIds)
{
size += 1 + extensionId.Length;
}
}
byte[] data = new byte[size];
P2ptpCommon.EncodeHeader(data, PacketType.hello);
int index = P2ptpCommon.HeaderSize;
PeerId.Encode(FromPeerId, data, ref index);
StreamId.Encode(StreamId, data, ref index);
PeerId.Encode(ToPeerId, data, ref index);
P2ptpCommon.EncodeUInt32(data, ref index, LibraryVersion);
P2ptpCommon.EncodeUInt16(data, ref index, ProtocolVersion);
data[index++] = (byte)Status;
P2ptpCommon.EncodeUInt32(data, ref index, RequestTime32);
data[index++] = RoleFlags;
data[index++] = (byte)(ExtensionIds?.Length ?? 0);
if (ExtensionIds != null)
{
foreach (var extensionId in ExtensionIds)
{
P2ptpCommon.EncodeString1ASCII(data, ref index, extensionId);
}
}
return(data);
}
internal static PeersListPacket_SharedPeerIpv4 Decode(byte[] data, ref int index)
{
return(new PeersListPacket_SharedPeerIpv4(
StreamId.Decode(data, ref index),
PeerId.Decode(data, ref index),
new IPEndPoint(new IPAddress(P2ptpCommon.DecodeUInt32(data, ref index)), P2ptpCommon.DecodeUInt16(data, ref index))
));
}
internal static (PeerId fromPeerId, PeerId toPeerId, StreamId streamId, string extensionId) ParseExtensionSignalingPacket(BinaryReader reader)
{
var fromPeerId = PeerId.Decode(reader);
var toPeerId = PeerId.Decode(reader);
var streamId = StreamId.Decode(reader);
var extensionId = P2ptpCommon.DecodeString1ASCII(reader);
return(fromPeerId, toPeerId, streamId, extensionId);
}
internal void Encode(byte[] data, ref int index)
{
StreamId.Encode(FromSocketAtStreamId, data, ref index);
PeerId.Encode(ToPeerId, data, ref index);
if (ToEndPoint.Address.AddressFamily != System.Net.Sockets.AddressFamily.InterNetwork)
{
throw new NotSupportedException("only IPv4 is supported");
}
#pragma warning disable CS0618 // Type or member is obsolete
P2ptpCommon.EncodeUInt32(data, ref index, (uint)ToEndPoint.Address.Address);
#pragma warning restore CS0618 // Type or member is obsolete
P2ptpCommon.EncodeUInt16(data, ref index, (ushort)ToEndPoint.Port);
}
public static StreamId Decode(BinaryReader reader)
{
var id = P2ptpCommon.DecodeUInt32(reader);
if (id == 0)
{
return(null);
}
else
{
return(new StreamId(id));
}
}
public static StreamId Decode(byte[] data, ref int index)
{
var id = P2ptpCommon.DecodeUInt32(data, ref index);
if (id == 0)
{
return(null);
}
else
{
return(new StreamId(id));
}
}
public byte[] Encode()
{
var data = new byte[EncodedSizeMinimum + SharedPeers.Length * PeersListPacket_SharedPeerIpv4.EncodedSize];
P2ptpCommon.EncodeHeader(data, PacketTypes.peersListIpv4);
var index = P2ptpCommon.HeaderSize;
PeerId.Encode(FromPeerId, data, ref index);
StreamId.Encode(StreamId, data, ref index);
data[index++] = (byte)SharedPeers.Length;
foreach (var peer in SharedPeers)
{
peer.Encode(data, ref index);
}
return(data);
}
//const int MinEncodedSize = P2ptpCommon.HeaderSize +
// PeerId.EncodedSize + StreamId.EncodedSize +
// PeerId.EncodedSize +
// 4 + 2 + // library, protocol version
// 1 + // status
// 4 + // requesttime
// 1 + // role flags
// 1; // extensions length
//const int OptionalEncodedSize = 2 + // RequestSequenceNumber
// 2 +//ResponseCpuDelayMs
// 1; // RequestedFromIp length
public byte[] Encode()
{
// var size = MinEncodedSize;
// if (ExtensionIds != null)
// foreach (var extensionId in ExtensionIds)
// size += 1 + extensionId.Length;
var requestedFromIp = RequestedFromIp ?? "";
FlagIshareMyIpLocation = (IpLocationData != null);
// size += OptionalEncodedSize + requestedFromIp.Length;
// byte[] data = new byte[size];
PacketProcedures.CreateBinaryWriter(out var ms, out var writer);
P2ptpCommon.EncodeHeader(writer, PacketTypes.hello);
// int index = P2ptpCommon.HeaderSize;
PeerId.Encode(writer, FromPeerId);
StreamId.Encode(writer, StreamId);
PeerId.Encode(writer, ToPeerId);
writer.Write(LibraryVersion);
writer.Write(ProtocolVersion);
writer.Write((byte)Status);
writer.Write(RequestTime32);
writer.Write(Flags);
writer.Write((byte)(ExtensionIds?.Length ?? 0));
if (ExtensionIds != null)
{
foreach (var extensionId in ExtensionIds)
{
PacketProcedures.EncodeString1ASCII(writer, extensionId);
}
}
writer.Write(RequestSequenceNumber ?? 0);
writer.Write(ResponseCpuDelayMs ?? 0);
PacketProcedures.EncodeString1ASCII(writer, requestedFromIp);
if (FlagIshareMyIpLocation)
{
IpLocationData.Encode(writer);
}
return(ms.ToArray());
}
public static void InitializeExtensionSignalingPacket(BinaryWriter writer, PeerId fromPeerId, PeerId toPeerId, StreamId streamId, string extensionId)
{
if (fromPeerId == null)
{
throw new ArgumentNullException(nameof(fromPeerId));
}
if (toPeerId == null)
{
throw new ArgumentNullException(nameof(toPeerId));
}
if (streamId == null)
{
throw new ArgumentNullException(nameof(streamId));
}
P2ptpCommon.EncodeHeader(writer, PacketType.extensionSignaling);
PeerId.Encode(writer, fromPeerId);
PeerId.Encode(writer, toPeerId);
StreamId.Encode(writer, streamId);
P2ptpCommon.EncodeString1ASCII(writer, extensionId);
}
public PeerHelloPacket(byte[] data)
{
if (data.Length < MinEncodedSize)
{
throw new ArgumentException(nameof(data));
}
var index = P2ptpCommon.HeaderSize;
FromPeerId = PeerId.Decode(data, ref index);
StreamId = StreamId.Decode(data, ref index);
ToPeerId = PeerId.Decode(data, ref index);
LibraryVersion = P2ptpCommon.DecodeUInt32(data, ref index);
ProtocolVersion = P2ptpCommon.DecodeUInt16(data, ref index);
Status = (PeerHelloRequestStatus)data[index++];
RequestTime32 = P2ptpCommon.DecodeUInt32(data, ref index);
RoleFlags = data[index++];
var extensionIdsLength = data[index++];
ExtensionIds = new string[extensionIdsLength];
for (byte i = 0; i < extensionIdsLength; i++)
{
ExtensionIds[i] = P2ptpCommon.DecodeString1ASCII(data, ref index);
}
}
public static void Encode(BinaryWriter writer, StreamId streamId)
{
P2ptpCommon.EncodeUInt32(writer, streamId?.Id ?? 0);
}
public static void Encode(StreamId streamId, byte[] data, ref int index)
{
P2ptpCommon.EncodeUInt32(data, ref index, streamId?.Id ?? 0);
}
