bool TryDecodePacket(IChannelHandlerContext context, IByteBuffer buffer, out Packet packet) { if (!buffer.IsReadable(2)) { packet = null; return(false); } byte signature = buffer.ReadByte(); if (!TryDecodeRemainingLength(buffer, out int remainingLength) || !buffer.IsReadable(remainingLength)) { packet = null; return(false); } var fixedHeader = new FixedHeader(signature, remainingLength); switch (fixedHeader.PacketType) { case PacketType.CONNECT: packet = new ConnectPacket(); break; case PacketType.CONNACK: packet = new ConnAckPacket(); break; case PacketType.DISCONNECT: packet = new DisconnectPacket(); break; case PacketType.PINGREQ: packet = new PingReqPacket(); break; case PacketType.PINGRESP: packet = new PingRespPacket(); break; case PacketType.PUBACK: packet = new PubAckPacket(); break; case PacketType.PUBCOMP: packet = new PubCompPacket(); break; case PacketType.PUBLISH: packet = new PublishPacket(); break; case PacketType.PUBREC: packet = new PubRecPacket(); break; case PacketType.PUBREL: packet = new PubRelPacket(); break; case PacketType.SUBSCRIBE: packet = new SubscribePacket(); break; case PacketType.SUBACK: packet = new SubAckPacket(); break; case PacketType.UNSUBSCRIBE: packet = new UnsubscribePacket(); break; case PacketType.UNSUBACK: packet = new UnsubscribePacket(); break; default: throw new DecoderException("Unsupported Message Type"); } packet.FixedHeader = fixedHeader; packet.Decode(buffer); return(true); }
Packet DecodePacketInternal(IByteBuffer buffer, byte packetSignature, ref int remainingLength) { Packet packet; var fixedHeader = new FixedHeader(packetSignature, remainingLength); switch (fixedHeader.PacketType) { case PacketType.CONNECT: packet = new ConnectPacket(); break; case PacketType.CONNACK: packet = new ConnAckPacket(); break; case PacketType.DISCONNECT: packet = new DisconnectPacket(); break; case PacketType.PINGREQ: packet = new PingReqPacket(); break; case PacketType.PINGRESP: packet = new PingRespPacket(); break; case PacketType.PUBACK: packet = new PubAckPacket(); break; case PacketType.PUBCOMP: packet = new PubCompPacket(); break; case PacketType.PUBLISH: packet = new PublishPacket(); break; case PacketType.PUBREC: packet = new PubRecPacket(); break; case PacketType.PUBREL: packet = new PubRelPacket(); break; case PacketType.SUBSCRIBE: packet = new SubscribePacket(); break; case PacketType.SUBACK: packet = new SubAckPacket(); break; case PacketType.UNSUBSCRIBE: packet = new UnsubscribePacket(); break; case PacketType.UNSUBACK: packet = new UnsubscribePacket(); break; default: throw new DecoderException("Unsupported Message Type"); } packet.FixedHeader = fixedHeader; packet.Decode(buffer); remainingLength = packet.RemaingLength; return(packet); }