protected internal override bool Feed(byte[] data, int cnt, IPEndPoint ep)
{
if (_Conv == 0)
{ // this means the conv has not been accepted by client.
var conv = ReadConv(data, cnt);
if (conv == 0)
{ // wrong packet.
return(false);
}
else if (conv == 1)
{ // the unaccepted connection
var guid = ReadGUID(data, cnt);
if (guid == Guid.Empty)
{
if (EP != null && EP.Equals(ep))
{ // this means the ack-packet or something else.
return(_KCP.kcp_input(data, cnt) == 0);
}
else
{ // client should provide a guid for new connection
return(false);
}
}
else
{
if (_PendingGUID == Guid.Empty)
{ // accept this connection. bind this connection with the guid.
if (_KCP.kcp_input(data, cnt) == 0)
{
_PendingGUID = guid;
EP = ep;
// send the pending conv-id to client.
byte[] buffer = BufferPool.GetBufferFromPool();
if (BitConverter.IsLittleEndian)
{
var pconv = _PendingConv;
for (int i = 0; i < 4; ++i)
{
buffer[i] = (byte)((pconv >> (i * 8)) & 0xFF);
}
}
else
{
var pconv = _PendingConv;
for (int i = 0; i < 4; ++i)
{
buffer[i] = (byte)((pconv >> ((3 - i) * 8)) & 0xFF);
}
}
_KCP.kcp_send(buffer, 4);
BufferPool.ReturnBufferToPool(buffer);
_Connected = true;
return(true);
}
else
{
return(false);
}
}
else
{ // check the guid.
if (_PendingGUID == guid)
{
if (_KCP.kcp_input(data, cnt) == 0)
{
if (!ep.Equals(EP))
{ // check the ep changed?
EP = ep;
}
return(true);
}
else
{
return(false);
}
}
else
{
return(false);
}
}
}
}
else
{ // the first packet from accepted connection?
if (conv == _PendingConv)
{ // the first packet from accepted connection!
// change the kcp to real conv-id.
_Conv = conv;
_KCP.kcp_release();
_KCP = KCPLib.kcp_create(conv, (IntPtr)_InfoHandle);
_KCP.kcp_setoutput(Func_KCPOutput);
_KCP.kcp_nodelay(1, 10, 2, 1);
// set minrto to 10?
if (!ep.Equals(EP))
{ // check the ep changed?
EP = ep;
}
// Feed the data.
return(_KCP.kcp_input(data, cnt) == 0);
}
else
{ // this packet is for other connection.
return(false);
}
}
}
else
{ // the normal connection.
return(base.Feed(data, cnt, ep));
}
}
