/// <summary>
/// Parse bytes for a PUBREL message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBREL message instance</returns>
public static MQTTMsgPubrel Parse(byte fixedHeaderFirstByte, IMQTTNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MQTTMsgPubrel msg = new MQTTMsgPubrel();
// get remaining length and allocate buffer
int remainingLength = MQTTMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
// read QoS level from fixed header (would be QoS Level 1)
msg.qosLevel = (byte)((fixedHeaderFirstByte & QOS_LEVEL_MASK) >> QOS_LEVEL_OFFSET);
// read DUP flag from fixed header
msg.dupFlag = (((fixedHeaderFirstByte & DUP_FLAG_MASK) >> DUP_FLAG_OFFSET) == 0x01);
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
return(msg);
}
/// <summary>
/// Parse bytes for a PINGREQ message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PINGREQ message instance</returns>
public static MQTTMsgPingReq Parse(byte fixedHeaderFirstByte, IMQTTNetworkChannel channel)
{
MQTTMsgPingReq msg = new MQTTMsgPingReq();
// already know remaininglength is zero (MQTT specification),
// so it isn't necessary to read other data from socket
int remainingLength = MQTTMsgBase.decodeRemainingLength(channel);
return(msg);
}
/// <summary>
/// Parse bytes for a DISCONNECT message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>DISCONNECT message instance</returns>
public static MQTTMsgDisconnect Parse(byte fixedHeaderFirstByte, IMQTTNetworkChannel channel)
{
MQTTMsgDisconnect msg = new MQTTMsgDisconnect();
// get remaining length and allocate buffer
int remainingLength = MQTTMsgBase.decodeRemainingLength(channel);
// NOTE : remainingLength must be 0
return(msg);
}
/// <summary>
/// Parse bytes for a PUBREC message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBREC message instance</returns>
public static MQTTMsgPubrec Parse(byte fixedHeaderFirstByte, IMQTTNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MQTTMsgPubrec msg = new MQTTMsgPubrec();
// get remaining length and allocate buffer
int remainingLength = MQTTMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
return(msg);
}