public override void Encode(IByteBuffer buffer)
{
var buf = Unpooled.Buffer();
try
{
//variable header
buf.WriteString(ProtocolName); //byte 1 - 8
buf.WriteByte(ProtocolLevel); //byte 9
//connect flags; //byte 10
var flags = UsernameFlag.ToByte() << 7;
flags |= PasswordFlag.ToByte() << 6;
flags |= WillRetain.ToByte() << 5;
flags |= ((byte)WillQos) << 3;
flags |= WillFlag.ToByte() << 2;
flags |= CleanSession.ToByte() << 1;
buf.WriteByte((byte)flags);
//keep alive
buf.WriteShort(KeepAlive); //byte 11 - 12
//payload
buf.WriteString(ClientId);
if (WillFlag)
{
buf.WriteString(WillTopic);
buf.WriteString(WillMessage);
}
if (UsernameFlag)
{
buf.WriteString(UserName);
}
if (PasswordFlag)
{
buf.WriteString(Password);
}
FixedHeader.RemaingLength = buf.WriterIndex;
FixedHeader.WriteTo(buffer);
buffer.WriteBytes(buf);
}
finally
{
buf?.Release();
buf = null;
}
}
/// <summary>
/// CONNECT报文的可变报头按下列次序包含四个字段：
/// 协议名（Protocol Name）
/// 协议级别（Protocol Level）
/// 连接标志（Connect Flags）
/// 保持连接（Keep Alive）
/// </summary>
/// <param name="buffer"></param>
public void Encode(IByteBuffer buffer)
{
// 协议名 Protocol Name
// 协议级别 Protocol Level
buffer.WriteString(ProtocolName);
buffer.WriteByte(ProtocolLevel);
// 连接标志 Connect Flags
var connectFlags = UsernameFlag.ToByte() << 7;
connectFlags |= PasswordFlag.ToByte() << 6;
connectFlags |= WillRetain.ToByte() << 5;
connectFlags |= ((byte)WillQos) << 3;
connectFlags |= WillFlag.ToByte() << 2;
connectFlags |= CleanSession.ToByte() << 1;
buffer.WriteByte(connectFlags);
// 保持连接 Keep Alive
buffer.WriteShort(KeepAlive);
}
public override void Encode(Stream stream)
{
using (var body = new MemoryStream())
{
//variable header
body.WriteString(ProtocolName); //byte 1 - 8
body.WriteByte(ProtocolVersion); //byte 9
//ConnectFlags.WriteTo(body); //byte 10
var flags = UsernameFlag.ToByte() << 7;
flags |= PasswordFlag.ToByte() << 6;
flags |= WillRetain.ToByte() << 5;
flags |= ((byte)WillQos) << 3;
flags |= WillFlag.ToByte() << 2;
flags |= CleanSession.ToByte() << 1;
body.WriteByte((byte)flags);
//keep alive
body.WriteShort(KeepAlive); //byte 11 - 12
//payload
body.WriteString(ClientId);
if (WillFlag)
{
body.WriteString(WillTopic);
body.WriteString(WillMessage);
}
if (UsernameFlag)
{
body.WriteString(Username);
}
if (PasswordFlag)
{
body.WriteString(Password);
}
FixedHeader.RemaingLength = (int)body.Length;
FixedHeader.WriteTo(stream);
body.WriteTo(stream);
}
}