protected abstract void OnSessionClose(WebSocketSession session, WebSocketReceiveError error);
public WebSocketFragment Parse(byte[] receiveBytes, out WebSocketReceiveError error)
{
error = null;
WebSocketFragment fragment = new WebSocketFragment(receiveBytes);
#region validate
if (fragment.IsExtensionNegotiated)
{
error = new WebSocketReceiveError()
{
CloseStatusCode = WebSocketCloseStatusCode.ProtocolError, CloseReason = "RSV1,RSV2,RSV3 must be 0,because extension negotiation is not supported"
};
}
if (fragment.IsFinal && fragment.Opcode == WebSocketOpcode.Continuation)
{
error = new WebSocketReceiveError()
{
CloseStatusCode = WebSocketCloseStatusCode.ProtocolError, CloseReason = "FIN is set to 1 but opcode indicate a contituation"
};
}
if (fragment.Opcode == WebSocketOpcode.ReservedNoncontrolframe)
{
error = new WebSocketReceiveError()
{
CloseStatusCode = WebSocketCloseStatusCode.ProtocolError, CloseReason = "Opcode 3-7 is reserved for non-control frames and is not suported now"
};
}
if (fragment.Opcode == WebSocketOpcode.ReservedControlframe)
{
error = new WebSocketReceiveError()
{
CloseStatusCode = WebSocketCloseStatusCode.ProtocolError, CloseReason = "Opcode B-F is reserved for controlframes and is not suported now"
};
}
if (fragment.IsFinal && fragment.Opcode == WebSocketOpcode.Ping)
{
error = new WebSocketReceiveError()
{
CloseStatusCode = WebSocketCloseStatusCode.ProtocolError, CloseReason = "Ping frame can not be fragmented"
};
}
if (fragment.IsFinal && fragment.Opcode == WebSocketOpcode.Pong)
{
error = new WebSocketReceiveError()
{
CloseStatusCode = WebSocketCloseStatusCode.ProtocolError, CloseReason = "Pong frame can not be fragmented"
};
}
if (fragment.IsFinal && fragment.Opcode == WebSocketOpcode.Close)
{
error = new WebSocketReceiveError()
{
CloseStatusCode = WebSocketCloseStatusCode.ProtocolError, CloseReason = "Close frame can not be fragmented"
};
}
if (fragment.Opcode == WebSocketOpcode.Unkown)
{
error = new WebSocketReceiveError()
{
CloseStatusCode = WebSocketCloseStatusCode.ProtocolError, CloseReason = "Unkown Opcode"
};
}
if (!fragment.IsMasked)
{
error = new WebSocketReceiveError()
{
CloseStatusCode = WebSocketCloseStatusCode.ProtocolError, CloseReason = "Message send from client must be masked"
};
}
if (fragment.PayloadLength != (ulong)fragment.PayloadData.Length)
{
error = new WebSocketReceiveError()
{
CloseStatusCode = WebSocketCloseStatusCode.ProtocolError, CloseReason = "payloadlength field value does not match the length of received payload data"
};
}
#endregion
return(fragment);
}