public static RUDPInternalPacket Deserialize(byte[] header, byte[] data)
{
RUDPInternalPacket p = new RUDPInternalPacket();
MemoryStream ms = new MemoryStream(data);
using (BinaryReader br = new BinaryReader(ms))
{
br.ReadBytes(header.Length);
p.Channel = br.ReadInt32();
p.Type = (RUDPInternalPacketType)br.ReadByte();
p.Data = br.ReadInt32();
p.ExtraData = br.ReadString();
}
return(p);
}
private void ProcessChannelData(IPEndPoint ep, byte[] data, int length)
{
RUDPPacket p;
RUDPChannel channel;
RUDPInternalPacket ip;
DateTime dtNow = DateTime.Now;
Trace("RECV: {0}", Encoding.ASCII.GetString(data));
string strEp = ep.ToString();
bool isNormalPacket = length >= PacketHeader.Length && data.Take(PacketHeader.Length).SequenceEqual(PacketHeader);
bool isInternalPacket = length >= PacketHeaderInternal.Length && data.Take(PacketHeaderInternal.Length).SequenceEqual(PacketHeaderInternal);
if (isInternalPacket)
{
ip = RUDPInternalPacket.Deserialize(PacketHeaderInternal, data);
Trace("INTERNAL RECV <- {0}: {1}", ep, ip);
if (ip.Channel == 0)
{
switch (ip.Type)
{
case RUDPInternalPacket.RUDPInternalPacketType.CHANNELREQUEST:
string channelName = ip.ExtraData;
int channelId = RequestFreeChannel(ep, channelName);
Trace("Assigning channel {0} as {1}", channelId, channelName);
ip = new RUDPInternalPacket()
{
Type = RUDPInternalPacket.RUDPInternalPacketType.CHANNELASSIGN, Channel = 0, Data = channelId, ExtraData = channelName
};
_socket.SendBytes(ep, ip.Serialize(PacketHeaderInternal));
break;
case RUDPInternalPacket.RUDPInternalPacketType.CHANNELASSIGN:
if (!_channels.ContainsKey(strEp))
{
_channels[strEp] = new List <RUDPChannel>();
}
Trace("Channel {0} assigned as {1}", ip.ExtraData, ip.Data);
RUDPChannel c = new RUDPChannel()
{
Connection = this,
Id = ip.Data,
Name = ip.ExtraData,
IsServer = false,
EndPoint = ep
}.Init();
_channels[strEp].Add(c);
OnChannelAssigned?.Invoke(c);
break;
case RUDPInternalPacket.RUDPInternalPacketType.PING:
channel = _channels[strEp].Where(x => x.Id == ip.Channel).SingleOrDefault();
if (!(channel == null || channel.State >= State.CLOSING))
{
if (ip.Data == 0)
{
_socket.SendBytes(ep, new RUDPInternalPacket()
{
Type = RUDPInternalPacket.RUDPInternalPacketType.PING, Channel = channel.Id, Data = 1
}.Serialize(PacketHeaderInternal));
}
channel.LastKeepAliveReceived = DateTime.Now;
}
break;
}
}
else
{
channel = _channels[strEp].Where(x => x.Id == ip.Channel).SingleOrDefault();
if (channel == null || channel.State >= State.CLOSING)
{
Trace("Channel {0} not found for {1} or channel is CLOSING", ip.Channel, strEp);
return;
}
switch (ip.Type)
{
case RUDPInternalPacket.RUDPInternalPacketType.ACK:
channel.LastKeepAliveReceived = DateTime.Now;
channel.AcknowledgePacket(ip.Data);
break;
}
}
}
else if (isNormalPacket)
{
p = Serializer.Deserialize(PacketHeader, data);
channel = _channels[strEp].Where(x => x.Id == p.Channel).SingleOrDefault();
if (channel != null)
{
p.Src = ep;
p.Serializer = Serializer;
Trace("ADDRECV: {0}", p);
channel.AddReceivedPacket(p);
channel.LastKeepAliveReceived = DateTime.Now;
ip = new RUDPInternalPacket()
{
Type = RUDPInternalPacket.RUDPInternalPacketType.ACK, Channel = p.Channel, Data = p.Seq
};
Trace("INTERNAL SEND -> {0}: {1}", ep, ip);
_socket.SendBytes(ep, ip.Serialize(PacketHeaderInternal));
}
else
{
Trace("Unknown channel {0} for {1}", p.Channel, p);
}
}
}
