/// <summary>
/// Parse bytes for a PUBREC message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBREC message instance</returns>
public static MqttMsgPubrec Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttMsgPubrec msg = new MqttMsgPubrec();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_PUBREC_FLAG_BITS)
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
// 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;
}
/// <summary>
/// Parse bytes for a SUBACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>SUBACK message instance</returns>
public static MqttMsgSuback Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttMsgSuback msg = new MqttMsgSuback();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_SUBACK_FLAG_BITS)
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
// 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++]);
// payload contains QoS levels granted
msg.grantedQosLevels = new byte[remainingLength - MESSAGE_ID_SIZE];
int qosIdx = 0;
do
{
msg.grantedQosLevels[qosIdx++] = buffer[index++];
} while (index < remainingLength);
return msg;
}
/// <summary>
/// Parse bytes for a SUBACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>SUBACK message instance</returns>
public static MqttMsgSuback Parse(byte fixedHeaderFirstByte, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttMsgSuback msg = new MqttMsgSuback();
// 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++]);
// payload contains QoS levels granted
msg.grantedQosLevels = new byte[remainingLength - MESSAGE_ID_SIZE];
int qosIdx = 0;
do
{
msg.grantedQosLevels[qosIdx++] = buffer[index++];
} while (index < remainingLength);
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 PINGRESP message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PINGRESP message instance</returns>
public static MqttMsgPingResp Parse(byte fixedHeaderFirstByte, IMqttNetworkChannel channel)
{
MqttMsgPingResp msg = new MqttMsgPingResp();
// 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 CONNACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNACK message instance</returns>
public static MqttMsgConnack Parse(byte fixedHeaderFirstByte, IMqttNetworkChannel channel)
{
byte[] buffer;
MqttMsgConnack msg = new MqttMsgConnack();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
// ...and set return code from broker
msg.returnCode = buffer[CONN_RETURN_CODE_BYTE_OFFSET];
return msg;
}
/// <summary>
/// Parse bytes for a PINGRESP message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PINGRESP message instance</returns>
public static MqttMsgPingResp Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
MqttMsgPingResp msg = new MqttMsgPingResp();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_PINGRESP_FLAG_BITS)
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
// 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="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>DISCONNECT message instance</returns>
public static MqttMsgDisconnect Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
MqttMsgDisconnect msg = new MqttMsgDisconnect();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_DISCONNECT_FLAG_BITS)
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
// NOTE : remainingLength must be 0
return msg;
}
/// <summary>
/// Parse bytes for a UNSUBACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>UNSUBACK message instance</returns>
public static MqttMsgUnsuback Parse(byte fixedHeaderFirstByte, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttMsgUnsuback msg = new MqttMsgUnsuback();
// 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;
}
/// <summary>
/// Parse bytes for a PUBREL message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBREL message instance</returns>
public static MqttMsgPubrel Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttMsgPubrel msg = new MqttMsgPubrel();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_PUBREL_FLAG_BITS)
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1)
{
// only 3.1.0
// 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 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 DISCONNECT message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">MQTT Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>DISCONNECT message instance</returns>
public static MqttMsgDisconnect Parse(byte fixedHeaderFirstByte, MqttProtocolVersion protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttMsgDisconnect msg = new MqttMsgDisconnect();
if (((protocolVersion == MqttProtocolVersion.Version_3_1_1) || (protocolVersion == MqttProtocolVersion.Version_5)) &&
((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_DISCONNECT_FLAG_BITS))
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
// get remaining length and allocate buffer
int remainingLength = DecodeVariableByte(channel);
// NOTE : remainingLength must be 0
if ((remainingLength != 0) && (protocolVersion == MqttProtocolVersion.Version_5))
{
// V5.0 specific
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
msg.ResonCode = (MqttReasonCode)buffer[index++];
int propSize = EncodeDecodeHelper.GetPropertySize(buffer, ref index);
propSize += index;
MqttProperty prop;
while (propSize > index)
{
prop = (MqttProperty)buffer[index++];
switch (prop)
{
case MqttProperty.SessionExpiryInterval:
// 4 bytes
msg.SessionExpiryInterval = EncodeDecodeHelper.DecodeUint(buffer, ref index);
break;
case MqttProperty.ReasonString:
// UTF8 encoded
msg.Reason = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.UserProperty:
// UTF8 key value encoding, so 2 strings in a raw
string key = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
string value = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
msg.UserProperties.Add(new UserProperty(key, value));
break;
case MqttProperty.ServerReference:
// UTF8 encoded
msg.ServerReference = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
default:
// non supported property
index = propSize;
break;
}
}
}
return(msg);
}
/// <summary>
/// Parse bytes for a SUBSCRIBE message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>SUBSCRIBE message instance</returns>
public static MqttMsgSubscribe Parse(byte fixedHeaderFirstByte, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgSubscribe msg = new MqttMsgSubscribe();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
int received = channel.Receive(buffer);
// read QoS level from fixed header
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);
// retain flag not used
msg.retain = false;
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
// payload contains topics and QoS levels
// NOTE : before, I don't know how many topics will be in the payload (so use List)
// if .Net Micro Framework
#if (MF_FRAMEWORK_VERSION_V4_2 || MF_FRAMEWORK_VERSION_V4_3)
IList tmpTopics = new ArrayList();
IList tmpQosLevels = new ArrayList();
// else other frameworks (.Net, .Net Compact, Mono, Windows Phone)
#else
IList<String> tmpTopics = new List<String>();
IList<byte> tmpQosLevels = new List<byte>();
#endif
do
{
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
tmpTopics.Add(new String(Encoding.UTF8.GetChars(topicUtf8)));
// QoS level
tmpQosLevels.Add(buffer[index++]);
} while (index < remainingLength);
// copy from list to array
msg.topics = new string[tmpTopics.Count];
msg.qosLevels = new byte[tmpQosLevels.Count];
for (int i = 0; i < tmpTopics.Count; i++)
{
msg.topics[i] = (string)tmpTopics[i];
msg.qosLevels[i] = (byte)tmpQosLevels[i];
}
return msg;
}
/// <summary>
/// Parse bytes for a CONNACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNACK message instance</returns>
public static MqttMsgConnack Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
MqttMsgConnack msg = new MqttMsgConnack();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_CONNACK_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] ... set session present flag ...
msg.sessionPresent = (buffer[CONN_ACK_FLAGS_BYTE_OFFSET] & SESSION_PRESENT_FLAG_MASK) != 0x00;
}
// ...and set return code from broker
msg.returnCode = buffer[CONN_RETURN_CODE_BYTE_OFFSET];
return(msg);
}
/// <summary>
/// Parse bytes for a CONNACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNACK message instance</returns>
public static MqttMsgConnack Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
MqttMsgConnack msg = new MqttMsgConnack();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_CONNACK_FLAG_BITS)
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] ... set session present flag ...
msg.sessionPresent = (buffer[CONN_ACK_FLAGS_BYTE_OFFSET] & SESSION_PRESENT_FLAG_MASK) != 0x00;
}
// ...and set return code from broker
msg.returnCode = buffer[CONN_RETURN_CODE_BYTE_OFFSET];
return msg;
}
/// <summary>
/// Parse bytes for a PUBLISH message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">MQTT Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBLISH message instance</returns>
public static MqttMsgPublish Parse(byte fixedHeaderFirstByte, MqttProtocolVersion protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgPublish msg = new MqttMsgPublish();
// get remaining length and allocate buffer
int remainingLength = DecodeVariableByte(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
int received = channel.Receive(buffer);
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
msg.Topic = new string(Encoding.UTF8.GetChars(topicUtf8));
// read QoS level from fixed header
msg.QosLevel = (MqttQoSLevel)((fixedHeaderFirstByte & QOS_LEVEL_MASK) >> QOS_LEVEL_OFFSET);
// check wrong QoS level (both bits can't be set 1)
if (msg.QosLevel > MqttQoSLevel.ExactlyOnce)
{
throw new MqttClientException(MqttClientErrorCode.QosNotAllowed);
}
// read DUP flag from fixed header
msg.DupFlag = (((fixedHeaderFirstByte & DUP_FLAG_MASK) >> DUP_FLAG_OFFSET) == 0x01);
// read retain flag from fixed header
msg.Retain = (((fixedHeaderFirstByte & RETAIN_FLAG_MASK) >> RETAIN_FLAG_OFFSET) == 0x01);
// message id is valid only with QOS level 1 or QOS level 2
if ((msg.QosLevel == MqttQoSLevel.AtLeastOnce) ||
(msg.QosLevel == MqttQoSLevel.ExactlyOnce))
{
// message id
msg.MessageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.MessageId |= buffer[index++];
}
// We do have the properties here to decode
if (protocolVersion == MqttProtocolVersion.Version_5)
{
// size of the properties
int propSize = EncodeDecodeHelper.GetPropertySize(buffer, ref index);
propSize += index;
MqttProperty prop;
while (propSize > index)
{
prop = (MqttProperty)buffer[index++];
switch (prop)
{
case MqttProperty.PayloadFormatIndicator:
msg.IsPayloadUTF8 = buffer[index++] != 0;
break;
case MqttProperty.MessageExpiryInterval:
msg.MessageExpiryInterval = EncodeDecodeHelper.DecodeUint(buffer, ref index);
break;
case MqttProperty.TopicAlias:
msg.TopicAlias = (ushort)(buffer[index++] << 8);
msg.TopicAlias |= buffer[index++];
break;
case MqttProperty.ResponseTopic:
msg.ResponseTopic = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.CorrelationData:
// byte[]
int length = ((buffer[index++] << 8) & 0xFF00);
length |= buffer[index++];
msg.CorrelationData = new byte[length];
Array.Copy(buffer, index, msg.CorrelationData, 0, length);
index += length;
break;
case MqttProperty.UserProperty:
// UTF8 key value encoding, so 2 strings in a raw
string key = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
string value = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
msg.UserProperties.Add(new UserProperty(key, value));
break;
case MqttProperty.SubscriptionIdentifier:
msg.SubscriptionIdentifier = EncodeDecodeHelper.DecodeVariableByte(buffer, ref index);
break;
case MqttProperty.ContentType:
msg.ContentType = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
default:
// non supported property
index = propSize;
break;
}
}
}
// get payload with message data
int messageSize = remainingLength - index;
int remaining = messageSize;
int messageOffset = 0;
msg.Message = new byte[messageSize];
// BUG FIX 26/07/2013 : receiving large payload
// copy first part of payload data received
Array.Copy(buffer, index, msg.Message, messageOffset, received - index);
remaining -= received - index;
messageOffset += received - index;
// if payload isn't finished
while (remaining > 0)
{
// receive other payload data
received = channel.Receive(buffer);
Array.Copy(buffer, 0, msg.Message, messageOffset, received);
remaining -= received;
messageOffset += received;
}
return(msg);
}
/// <summary>
/// Parse bytes for a CONNACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNACK message instance</returns>
public static MqttMsgConnack Parse(byte fixedHeaderFirstByte, MqttProtocolVersion protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttMsgConnack msg = new MqttMsgConnack();
if ((protocolVersion == MqttProtocolVersion.Version_3_1_1) || (protocolVersion == MqttProtocolVersion.Version_5))
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_CONNACK_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// get remaining length and allocate buffer
int remainingLength = DecodeVariableByte(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
if ((protocolVersion == MqttProtocolVersion.Version_3_1_1) || (protocolVersion == MqttProtocolVersion.Version_5))
{
// [v3.1.1] ... set session present flag ...
msg.SessionPresent = (buffer[index++] & SESSION_PRESENT_FLAG_MASK) != 0x00;
}
// ...and set return code from broker
msg.ReturnCode = (MqttReasonCode)buffer[index++];
// v5.0 properties
if (protocolVersion == MqttProtocolVersion.Version_5)
{
// size of the properties
int propSize = EncodeDecodeHelper.GetPropertySize(buffer, ref index);
propSize += index;
MqttProperty prop;
while (propSize > index)
{
prop = (MqttProperty)buffer[index++];
switch (prop)
{
case MqttProperty.SessionExpiryInterval:
// 4 bytes
msg.SessionExpiryInterval = EncodeDecodeHelper.DecodeUint(buffer, ref index);
break;
case MqttProperty.ReceiveMaximum:
// 2 bytes
msg.ReceiveMaximum = (ushort)(buffer[index++] << 8);
msg.ReceiveMaximum |= buffer[index++];
break;
case MqttProperty.MaximumQoS:
msg.MaximumQoS = buffer[index++] != 0;
break;
case MqttProperty.RetainAvailable:
msg.RetainAvailable = buffer[index++] != 0;
break;
case MqttProperty.MaximumPacketSize:
// 4 bytes
msg.MaximumPacketSize = EncodeDecodeHelper.DecodeUint(buffer, ref index);
break;
case MqttProperty.AssignedClientIdentifier:
// UTF8 encoded
msg.AssignedClientIdentifier = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.TopicAliasMaximum:
// 2 bytes
msg.TopicAliasMaximum = (ushort)(buffer[index++] << 8);
msg.TopicAliasMaximum |= buffer[index++];
break;
case MqttProperty.ReasonString:
// UTF8 encoded
msg.Reason = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.UserProperty:
// UTF8 key value encoding, so 2 strings in a raw
string key = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
string value = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
msg.UserProperties.Add(new UserProperty(key, value));
break;
case MqttProperty.WildcardSubscriptionAvailable:
msg.WildcardSubscriptionAvailable = buffer[index++] != 0;
break;
case MqttProperty.SubscriptionIdentifierAvailable:
msg.SubscriptionIdentifiersAvailable = buffer[index++] != 0;
break;
case MqttProperty.SharedSubscriptionAvailable:
msg.SharedSubscriptionAvailable = buffer[index++] != 0;
break;
case MqttProperty.ServerKeepAlive:
// 2 bytes
msg.ServerKeepAlive = (ushort)(buffer[index++] << 8);
msg.ServerKeepAlive |= buffer[index++];
break;
case MqttProperty.ResponseInformation:
// UTF8 encoded
msg.ResponseInformation = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.ServerReference:
// UTF8 encoded
msg.ServerReference = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.AuthenticationMethod:
// UTF8 encoded
msg.AuthenticationMethod = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.AuthenticationData:
// byte[]
int length = ((buffer[index++] << 8) & 0xFF00);
length |= buffer[index++];
msg.AuthenticationData = new byte[length];
Array.Copy(buffer, index, msg.AuthenticationData, 0, length);
index += length;
break;
default:
// non supported property
index = propSize;
break;
}
}
}
return(msg);
}
public MQTTClientBase(IMqttNetworkChannel channel)
{
_channel = channel;
_clientId = Guid.NewGuid().ToString();
}
/// <summary>
/// Decode remaining length reading bytes from socket
/// </summary>
/// <param name="channel">Channel from reading bytes</param>
/// <returns>Decoded remaining length</returns>
protected static int decodeRemainingLength(IMqttNetworkChannel channel)
{
int multiplier = 1;
int value = 0;
int digit = 0;
byte[] nextByte = new byte[1];
do
{
// next digit from stream
channel.Receive(nextByte);
digit = nextByte[0];
value += ((digit & 127) * multiplier);
multiplier *= 128;
} while ((digit & 128) != 0);
return value;
}
/// <summary>
/// Parse bytes for a PUBREC message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">MQTT Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBREC message instance</returns>
public static MqttMsgAuthentication Parse(byte fixedHeaderFirstByte, MqttProtocolVersion protocolVersion, IMqttNetworkChannel channel)
{
if (protocolVersion != MqttProtocolVersion.Version_5)
{
throw new NotSupportedException();
}
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_AUTH_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
MqttMsgAuthentication msg = new();
byte[] buffer;
int index = 0;
int length = 0;
// get remaining length and allocate buffer
int remainingLength = DecodeVariableByte(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
msg.ReasonCode = (MqttReasonCode)buffer[index++];
int propSize = EncodeDecodeHelper.GetPropertySize(buffer, ref index);
propSize += index;
MqttProperty prop;
while (propSize > index)
{
prop = (MqttProperty)buffer[index++];
switch (prop)
{
case MqttProperty.AuthenticationMethod:
// UTF8 encoded
msg.AuthenticationMethod = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.AuthenticationData:
// byte[]
length = ((buffer[index++] << 8) & 0xFF00);
length |= buffer[index++];
msg.AuthenticationData = new byte[length];
Array.Copy(buffer, index, msg.AuthenticationData, 0, length);
index += length;
break;
case MqttProperty.ReasonString:
// UTF8 encoded
msg.Reason = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.UserProperty:
// UTF8 key value encoding, so 2 strings in a raw
string key = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
string value = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
msg.UserProperties.Add(new UserProperty(key, value));
break;
default:
// non supported property
index = propSize;
break;
}
}
return(msg);
}
/// <summary>
/// Connect to broker
/// </summary>
/// <param name="clientId">Client identifier</param>
/// <param name="username">Username</param>
/// <param name="password">Password</param>
/// <param name="willRetain">Will retain flag</param>
/// <param name="willQosLevel">Will QOS level</param>
/// <param name="willFlag">Will flag</param>
/// <param name="willTopic">Will topic</param>
/// <param name="willMessage">Will message</param>
/// <param name="cleanSession">Clean sessione flag</param>
/// <param name="keepAlivePeriod">Keep alive period</param>
/// <returns>Return code of CONNACK message from broker</returns>
public byte Connect(string clientId,
string username,
string password,
bool willRetain,
byte willQosLevel,
bool willFlag,
string willTopic,
string willMessage,
bool cleanSession,
ushort keepAlivePeriod)
{
// create CONNECT message
MqttMsgConnect connect = new MqttMsgConnect(clientId,
username,
password,
willRetain,
willQosLevel,
willFlag,
willTopic,
willMessage,
cleanSession,
keepAlivePeriod);
try
{
// create network channel and connect to broker
#if WINDOWS_PHONE
this.channel = new WPMqttNetworkChannel(this.brokerHostName, this.brokerIpAddress, this.brokerPort, this.secure, this.caCert);
#else
this.channel = new MqttNetworkChannel(this.brokerHostName, this.brokerIpAddress, this.brokerPort, this.secure, this.caCert);
#endif
this.channel.Connect();
}
catch (Exception ex)
{
throw new MqttConnectionException("Exception connecting to the broker", ex);
}
this.lastCommTime = 0;
this.isRunning = true;
// start thread for receiving messages from broker
this.receiveThread = new Thread(this.ReceiveThread);
this.receiveThread.Start();
MqttMsgConnack connack = (MqttMsgConnack)this.SendReceive(connect);
// if connection accepted, start keep alive timer and
if (connack.ReturnCode == MqttMsgConnack.CONN_ACCEPTED)
{
// set all client properties
this.ClientId = clientId;
this.CleanSession = cleanSession;
this.WillFlag = willFlag;
this.WillTopic = willTopic;
this.WillMessage = willMessage;
this.WillQosLevel = willQosLevel;
this.keepAlivePeriod = keepAlivePeriod * 1000; // convert in ms
// start thread for sending keep alive message to the broker
this.keepAliveThread = new Thread(this.KeepAliveThread);
this.keepAliveThread.Start();
// start thread for raising received message event from broker
this.receiveEventThread = new Thread(this.ReceiveEventThread);
this.receiveEventThread.Start();
// start thread for handling inflight messages queue to broker asynchronously (publish and acknowledge)
this.processInflightThread = new Thread(this.ProcessInflightThread);
this.processInflightThread.Start();
this.IsConnected = true;
}
return connack.ReturnCode;
}
/// <summary>
/// Parse bytes for a PINGRESP message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">MQTT Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PINGRESP message instance</returns>
public static MqttMsgPingResp Parse(byte fixedHeaderFirstByte, MqttProtocolVersion protocolVersion, IMqttNetworkChannel channel)
{
MqttMsgPingResp msg = new MqttMsgPingResp();
if ((protocolVersion == MqttProtocolVersion.Version_3_1_1) || (protocolVersion == MqttProtocolVersion.Version_5))
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_PINGRESP_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// already know remaininglength is zero (MQTT specification),
// so it isn't necessary to read other data from socket
DecodeVariableByte(channel);
return(msg);
}
public static MqttMsgPubrel Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
int num1 = 0;
MqttMsgPubrel mqttMsgPubrel1 = new MqttMsgPubrel();
if (protocolVersion == (byte)4 && ((int)fixedHeaderFirstByte & 15) != 2)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
byte[] buffer = new byte[MqttMsgBase.decodeRemainingLength(channel)];
channel.Receive(buffer);
if (protocolVersion == (byte)3)
{
mqttMsgPubrel1.qosLevel = checked ((byte)(((int)fixedHeaderFirstByte & 6) >> 1));
mqttMsgPubrel1.dupFlag = ((int)fixedHeaderFirstByte & 8) >> 3 == 1;
}
MqttMsgPubrel mqttMsgPubrel2 = mqttMsgPubrel1;
byte[] numArray1 = buffer;
int index1 = num1;
int num2 = checked (index1 + 1);
int num3 = (int)checked ((ushort)((int)numArray1[index1] << 8 & 65280));
mqttMsgPubrel2.messageId = (ushort)num3;
MqttMsgPubrel mqttMsgPubrel3 = mqttMsgPubrel1;
int messageId = (int)mqttMsgPubrel3.messageId;
byte[] numArray2 = buffer;
int index2 = num2;
int num4 = checked (index2 + 1);
int num5 = (int)numArray2[index2];
mqttMsgPubrel3.messageId = (ushort)(messageId | num5);
return(mqttMsgPubrel1);
}
/// <summary>
/// Parse bytes for a CONNECT message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNECT message instance</returns>
public static MqttMsgConnect Parse(byte fixedHeaderFirstByte, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
int protNameUtf8Length;
byte[] protNameUtf8;
bool isUsernameFlag;
bool isPasswordFlag;
int clientIdUtf8Length;
byte[] clientIdUtf8;
int willTopicUtf8Length;
byte[] willTopicUtf8;
int willMessageUtf8Length;
byte[] willMessageUtf8;
int usernameUtf8Length;
byte[] usernameUtf8;
int passwordUtf8Length;
byte[] passwordUtf8;
MqttMsgConnect msg = new MqttMsgConnect();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
// protocol name
protNameUtf8Length = ((buffer[index++] << 8) & 0xFF00);
protNameUtf8Length |= buffer[index++];
protNameUtf8 = new byte[protNameUtf8Length];
Array.Copy(buffer, index, protNameUtf8, 0, protNameUtf8Length);
index += protNameUtf8Length;
msg.protocolName = new String(Encoding.UTF8.GetChars(protNameUtf8));
// protocol version
msg.protocolVersion = buffer[index];
index += PROTOCOL_VERSION_NUMBER_SIZE;
// connect flags
isUsernameFlag = (buffer[index] & USERNAME_FLAG_MASK) != 0x00;
isPasswordFlag = (buffer[index] & PASSWORD_FLAG_MASK) != 0x00;
msg.willRetain = (buffer[index] & WILL_RETAIN_FLAG_MASK) != 0x00;
msg.willQosLevel = (byte)((buffer[index] & WILL_QOS_FLAG_MASK) >> WILL_QOS_FLAG_OFFSET);
msg.willFlag = (buffer[index] & WILL_FLAG_MASK) != 0x00;
msg.cleanSession = (buffer[index] & CLEAN_SESSION_FLAG_MASK) != 0x00;
index += CONNECT_FLAGS_SIZE;
// keep alive timer
msg.keepAlivePeriod = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.keepAlivePeriod |= buffer[index++];
// client identifier
clientIdUtf8Length = ((buffer[index++] << 8) & 0xFF00);
clientIdUtf8Length |= buffer[index++];
clientIdUtf8 = new byte[clientIdUtf8Length];
Array.Copy(buffer, index, clientIdUtf8, 0, clientIdUtf8Length);
index += clientIdUtf8Length;
msg.clientId = new String(Encoding.UTF8.GetChars(clientIdUtf8));
// will topic and will message
if (msg.willFlag)
{
willTopicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
willTopicUtf8Length |= buffer[index++];
willTopicUtf8 = new byte[willTopicUtf8Length];
Array.Copy(buffer, index, willTopicUtf8, 0, willTopicUtf8Length);
index += willTopicUtf8Length;
msg.willTopic = new String(Encoding.UTF8.GetChars(willTopicUtf8));
willMessageUtf8Length = ((buffer[index++] << 8) & 0xFF00);
willMessageUtf8Length |= buffer[index++];
willMessageUtf8 = new byte[willMessageUtf8Length];
Array.Copy(buffer, index, willMessageUtf8, 0, willMessageUtf8Length);
index += willMessageUtf8Length;
msg.willMessage = new String(Encoding.UTF8.GetChars(willMessageUtf8));
}
// username
if (isUsernameFlag)
{
usernameUtf8Length = ((buffer[index++] << 8) & 0xFF00);
usernameUtf8Length |= buffer[index++];
usernameUtf8 = new byte[usernameUtf8Length];
Array.Copy(buffer, index, usernameUtf8, 0, usernameUtf8Length);
index += usernameUtf8Length;
msg.username = new String(Encoding.UTF8.GetChars(usernameUtf8));
}
// password
if (isPasswordFlag)
{
passwordUtf8Length = ((buffer[index++] << 8) & 0xFF00);
passwordUtf8Length |= buffer[index++];
passwordUtf8 = new byte[passwordUtf8Length];
Array.Copy(buffer, index, passwordUtf8, 0, passwordUtf8Length);
index += passwordUtf8Length;
msg.password = new String(Encoding.UTF8.GetChars(passwordUtf8));
}
return(msg);
}
/// <summary>
/// Parse bytes for a CONNECT message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">MQTT Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNECT message instance</returns>
public static MqttMsgConnect Parse(byte fixedHeaderFirstByte, MqttProtocolVersion protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
bool isUsernameFlag;
bool isPasswordFlag;
int length;
MqttMsgConnect msg = new MqttMsgConnect();
// get remaining length and allocate buffer
int remainingLength = DecodeVariableByte(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
// protocol name
msg.ProtocolName = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
// [v3.1.1] wrong protocol name valid for 5.0 as well
if (!msg.ProtocolName.Equals(PROTOCOL_NAME_V3_1) && !msg.ProtocolName.Equals(PROTOCOL_NAME_V3_1_1))
{
throw new MqttClientException(MqttClientErrorCode.InvalidProtocolName);
}
// protocol version
msg.ProtocolVersion = (MqttProtocolVersion)buffer[index];
index += PROTOCOL_VERSION_SIZE;
// connect flags
// [v3.1.1] check lsb (reserved) must be 0
if (((msg.ProtocolVersion == MqttProtocolVersion.Version_3_1_1) || (msg.ProtocolVersion == MqttProtocolVersion.Version_5)) &&
((buffer[index] & RESERVED_FLAG_MASK) != 0x00))
{
throw new MqttClientException(MqttClientErrorCode.InvalidConnectFlags);
}
isUsernameFlag = (buffer[index] & USERNAME_FLAG_MASK) != 0x00;
isPasswordFlag = (buffer[index] & PASSWORD_FLAG_MASK) != 0x00;
msg.WillRetain = (buffer[index] & WILL_RETAIN_FLAG_MASK) != 0x00;
msg.WillQosLevel = (byte)((buffer[index] & WILL_QOS_FLAG_MASK) >> WILL_QOS_FLAG_OFFSET);
msg.WillFlag = (buffer[index] & WILL_FLAG_MASK) != 0x00;
msg.CleanSession = (buffer[index] & CLEAN_SESSION_FLAG_MASK) != 0x00;
index += CONNECT_FLAGS_SIZE;
// keep alive timer
msg.KeepAlivePeriod = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.KeepAlivePeriod |= buffer[index++];
// In case of v5, we have properties encoded with length and type.
// This is different than in the v3.x protocols
if (msg.ProtocolVersion == MqttProtocolVersion.Version_5)
{
// size of the properties
int propSize = EncodeDecodeHelper.GetPropertySize(buffer, ref index);
propSize += index;
MqttProperty prop;
while (propSize > index)
{
prop = (MqttProperty)buffer[index++];
switch (prop)
{
case MqttProperty.AuthenticationMethod:
// UTF8 encoded
msg.AuthenticationMethod = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.AuthenticationData:
// byte[]
length = ((buffer[index++] << 8) & 0xFF00);
length |= buffer[index++];
msg.AuthenticationData = new byte[length];
Array.Copy(buffer, index, msg.AuthenticationData, 0, length);
index += length;
break;
case MqttProperty.RequestProblemInformation:
// 1 byte
msg.RequestProblemInformation = buffer[index++] != 0;
break;
case MqttProperty.RequestResponseInformation:
// 1 byte
msg.RequestResponseInformation = buffer[index++] != 0;
break;
case MqttProperty.ReceiveMaximum:
// 2 bytes
msg.ReceiveMaximum = (ushort)(buffer[index++] << 8);
msg.ReceiveMaximum |= buffer[index++];
break;
case MqttProperty.TopicAliasMaximum:
// 2 bytes
msg.TopicAliasMaximum = (ushort)(buffer[index++] << 8);
msg.TopicAliasMaximum |= buffer[index++];
break;
case MqttProperty.UserProperty:
// UTF8 key value encoding, so 2 strings in a raw
string key = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
string value = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
msg.UserProperties.Add(new UserProperty(key, value));
break;
case MqttProperty.MaximumPacketSize:
// 4 bytes
msg.MaximumPacketSize = EncodeDecodeHelper.DecodeUint(buffer, ref index);
break;
case MqttProperty.SessionExpiryInterval:
// 4 bytes
msg.SessionExpiryInterval = EncodeDecodeHelper.DecodeUint(buffer, ref index);
break;
case MqttProperty.WillDelayInterval:
// 4 bytes
msg.WillDelayInterval = EncodeDecodeHelper.DecodeUint(buffer, ref index);
break;
default:
// non supported property
index = propSize;
break;
}
}
}
// client identifier [v3.1.1] it may be zero bytes long (empty string)
msg.ClientId = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
// [v3.1.1] if client identifier is zero bytes long, clean session must be true
if ((msg.ProtocolVersion == MqttProtocolVersion.Version_3_1_1) && (msg.ClientId.Length == 0) && (!msg.CleanSession))
{
throw new MqttClientException(MqttClientErrorCode.InvalidClientId);
}
// will topic and will message
if (msg.WillFlag)
{
msg.WillTopic = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
msg.WillMessage = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
}
// username
if (isUsernameFlag)
{
msg.Username = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
}
// password
if (isPasswordFlag)
{
msg.Password = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
}
return(msg);
}
/// <summary>
/// Parse bytes for a CONNECT message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNECT message instance</returns>
public static MqttMsgConnect Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
int protNameUtf8Length;
byte[] protNameUtf8;
bool isUsernameFlag;
bool isPasswordFlag;
int clientIdUtf8Length;
byte[] clientIdUtf8;
int willTopicUtf8Length;
byte[] willTopicUtf8;
int willMessageUtf8Length;
byte[] willMessageUtf8;
int usernameUtf8Length;
byte[] usernameUtf8;
int passwordUtf8Length;
byte[] passwordUtf8;
MqttMsgConnect msg = new MqttMsgConnect();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
// protocol name
protNameUtf8Length = ((buffer[index++] << 8) & 0xFF00);
protNameUtf8Length |= buffer[index++];
protNameUtf8 = new byte[protNameUtf8Length];
Array.Copy(buffer, index, protNameUtf8, 0, protNameUtf8Length);
index += protNameUtf8Length;
msg.protocolName = new String(Encoding.UTF8.GetChars(protNameUtf8));
// [v3.1.1] wrong protocol name
if (!msg.protocolName.Equals(PROTOCOL_NAME_V3_1) && !msg.protocolName.Equals(PROTOCOL_NAME_V3_1_1))
throw new MqttClientException(MqttClientErrorCode.InvalidProtocolName);
// protocol version
msg.protocolVersion = buffer[index];
index += PROTOCOL_VERSION_SIZE;
// connect flags
// [v3.1.1] check lsb (reserved) must be 0
if ((msg.protocolVersion == PROTOCOL_VERSION_V3_1_1) &&
((buffer[index] & RESERVED_FLAG_MASK) != 0x00))
throw new MqttClientException(MqttClientErrorCode.InvalidConnectFlags);
isUsernameFlag = (buffer[index] & USERNAME_FLAG_MASK) != 0x00;
isPasswordFlag = (buffer[index] & PASSWORD_FLAG_MASK) != 0x00;
msg.willRetain = (buffer[index] & WILL_RETAIN_FLAG_MASK) != 0x00;
msg.willQosLevel = (byte)((buffer[index] & WILL_QOS_FLAG_MASK) >> WILL_QOS_FLAG_OFFSET);
msg.willFlag = (buffer[index] & WILL_FLAG_MASK) != 0x00;
msg.cleanSession = (buffer[index] & CLEAN_SESSION_FLAG_MASK) != 0x00;
index += CONNECT_FLAGS_SIZE;
// keep alive timer
msg.keepAlivePeriod = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.keepAlivePeriod |= buffer[index++];
// client identifier [v3.1.1] it may be zero bytes long (empty string)
clientIdUtf8Length = ((buffer[index++] << 8) & 0xFF00);
clientIdUtf8Length |= buffer[index++];
clientIdUtf8 = new byte[clientIdUtf8Length];
Array.Copy(buffer, index, clientIdUtf8, 0, clientIdUtf8Length);
index += clientIdUtf8Length;
msg.clientId = new String(Encoding.UTF8.GetChars(clientIdUtf8));
// [v3.1.1] if client identifier is zero bytes long, clean session must be true
if ((msg.protocolVersion == PROTOCOL_VERSION_V3_1_1) && (clientIdUtf8Length == 0) && (!msg.cleanSession))
throw new MqttClientException(MqttClientErrorCode.InvalidClientId);
// will topic and will message
if (msg.willFlag)
{
willTopicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
willTopicUtf8Length |= buffer[index++];
willTopicUtf8 = new byte[willTopicUtf8Length];
Array.Copy(buffer, index, willTopicUtf8, 0, willTopicUtf8Length);
index += willTopicUtf8Length;
msg.willTopic = new String(Encoding.UTF8.GetChars(willTopicUtf8));
willMessageUtf8Length = ((buffer[index++] << 8) & 0xFF00);
willMessageUtf8Length |= buffer[index++];
willMessageUtf8 = new byte[willMessageUtf8Length];
Array.Copy(buffer, index, willMessageUtf8, 0, willMessageUtf8Length);
index += willMessageUtf8Length;
msg.willMessage = new String(Encoding.UTF8.GetChars(willMessageUtf8));
}
// username
if (isUsernameFlag)
{
usernameUtf8Length = ((buffer[index++] << 8) & 0xFF00);
usernameUtf8Length |= buffer[index++];
usernameUtf8 = new byte[usernameUtf8Length];
Array.Copy(buffer, index, usernameUtf8, 0, usernameUtf8Length);
index += usernameUtf8Length;
msg.username = new String(Encoding.UTF8.GetChars(usernameUtf8));
}
// password
if (isPasswordFlag)
{
passwordUtf8Length = ((buffer[index++] << 8) & 0xFF00);
passwordUtf8Length |= buffer[index++];
passwordUtf8 = new byte[passwordUtf8Length];
Array.Copy(buffer, index, passwordUtf8, 0, passwordUtf8Length);
index += passwordUtf8Length;
msg.password = new String(Encoding.UTF8.GetChars(passwordUtf8));
}
return msg;
}
public static MqttMsgPingResp Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
MqttMsgPingResp mqttMsgPingResp = new MqttMsgPingResp();
if (protocolVersion == (byte)4 && ((uint)fixedHeaderFirstByte & 15U) > 0U)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
MqttMsgBase.decodeRemainingLength(channel);
return(mqttMsgPingResp);
}
/// <summary>
/// Parse bytes for a SUBSCRIBE message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>SUBSCRIBE message instance</returns>
public static MqttMsgSubscribe Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgSubscribe msg = new MqttMsgSubscribe();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_SUBSCRIBE_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
int received = channel.Receive(buffer);
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1)
{
msg._qosLevel = ((byte)((fixedHeaderFirstByte & QOS_LEVEL_MASK) >> QOS_LEVEL_OFFSET)).ToQOS();
msg._dupFlag = (((fixedHeaderFirstByte & DUP_FLAG_MASK) >> DUP_FLAG_OFFSET) == 0x01);
// retain flag not used
msg._retainFlag = false;
}
// message id
msg._messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg._messageId |= (buffer[index++]);
// payload contains topics and QoS levels
// NOTE : before, I don't know how many topics will be in the payload (so use List)
IList <String> tmpTopics = new List <String>();
IList <byte> tmpQosLevels = new List <byte>();
do
{
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
tmpTopics.Add(new String(Encoding.UTF8.GetChars(topicUtf8)));
// QoS level
tmpQosLevels.Add(buffer[index++]);
} while (index < remainingLength);
// copy from list to array
msg._topics = new string[tmpTopics.Count];
msg._qosLevels = new QOS[tmpQosLevels.Count];
for (int i = 0; i < tmpTopics.Count; i++)
{
msg._topics[i] = (string)tmpTopics[i];
msg._qosLevels[i] = ((byte)tmpQosLevels[i]).ToQOS();
}
return(msg);
}
/// <summary>
/// Parse bytes for a DISCONNECT message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>DISCONNECT message instance</returns>
public static MqttMsgDisconnect Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
MqttMsgDisconnect msg = new MqttMsgDisconnect();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_DISCONNECT_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
// NOTE : remainingLength must be 0
return(msg);
}
/// <summary>
/// Parse bytes for a SUBSCRIBE message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>SUBSCRIBE message instance</returns>
public static MqttMsgSubscribe Parse(byte fixedHeaderFirstByte, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgSubscribe msg = new MqttMsgSubscribe();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
int received = channel.Receive(buffer);
// read QoS level from fixed header
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);
// retain flag not used
msg.retain = false;
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
// payload contains topics and QoS levels
// NOTE : before, I don't know how many topics will be in the payload (so use List)
// if .Net Micro Framework
#if (MF_FRAMEWORK_VERSION_V4_2 || MF_FRAMEWORK_VERSION_V4_3)
IList tmpTopics = new ArrayList();
IList tmpQosLevels = new ArrayList();
// else other frameworks (.Net, .Net Compact, Mono, Windows Phone)
#else
IList <String> tmpTopics = new List <String>();
IList <byte> tmpQosLevels = new List <byte>();
#endif
do
{
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
tmpTopics.Add(new String(Encoding.UTF8.GetChars(topicUtf8)));
// QoS level
tmpQosLevels.Add(buffer[index++]);
} while (index < remainingLength);
// copy from list to array
msg.topics = new string[tmpTopics.Count];
msg.qosLevels = new byte[tmpQosLevels.Count];
for (int i = 0; i < tmpTopics.Count; i++)
{
msg.topics[i] = (string)tmpTopics[i];
msg.qosLevels[i] = (byte)tmpQosLevels[i];
}
return(msg);
}
public static MqttMsgConnack Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
MqttMsgConnack mqttMsgConnack = new MqttMsgConnack();
if (protocolVersion == (byte)4 && ((uint)fixedHeaderFirstByte & 15U) > 0U)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
byte[] buffer = new byte[MqttMsgBase.decodeRemainingLength(channel)];
channel.Receive(buffer);
if (protocolVersion == (byte)4)
{
mqttMsgConnack.sessionPresent = ((uint)buffer[0] & 1U) > 0U;
}
mqttMsgConnack.returnCode = buffer[1];
return(mqttMsgConnack);
}
public MQTTDeviceClient(IMqttNetworkChannel channel) : base(channel)
{
}
/// <summary>
/// Parse bytes for a CONNECT message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNECT message instance</returns>
public static MqttMsgConnect Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
int protNameUtf8Length;
byte[] protNameUtf8;
bool isUsernameFlag;
bool isPasswordFlag;
int clientIdUtf8Length;
byte[] clientIdUtf8;
int willTopicUtf8Length;
byte[] willTopicUtf8;
int willMessageUtf8Length;
byte[] willMessageUtf8;
int usernameUtf8Length;
byte[] usernameUtf8;
int passwordUtf8Length;
byte[] passwordUtf8;
MqttMsgConnect msg = new MqttMsgConnect();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
// protocol name
protNameUtf8Length = ((buffer[index++] << 8) & 0xFF00);
protNameUtf8Length |= buffer[index++];
protNameUtf8 = new byte[protNameUtf8Length];
Array.Copy(buffer, index, protNameUtf8, 0, protNameUtf8Length);
index += protNameUtf8Length;
msg.protocolName = new String(Encoding.UTF8.GetChars(protNameUtf8));
// [v3.1.1] wrong protocol name
if (!msg.protocolName.Equals(PROTOCOL_NAME_V3_1) && !msg.protocolName.Equals(PROTOCOL_NAME_V3_1_1))
{
throw new MqttClientException(MqttClientErrorCode.InvalidProtocolName);
}
// protocol version
msg.protocolVersion = buffer[index];
index += PROTOCOL_VERSION_SIZE;
// connect flags
// [v3.1.1] check lsb (reserved) must be 0
if ((msg.protocolVersion == PROTOCOL_VERSION_V3_1_1) &&
((buffer[index] & RESERVED_FLAG_MASK) != 0x00))
{
throw new MqttClientException(MqttClientErrorCode.InvalidConnectFlags);
}
isUsernameFlag = (buffer[index] & USERNAME_FLAG_MASK) != 0x00;
isPasswordFlag = (buffer[index] & PASSWORD_FLAG_MASK) != 0x00;
msg.willRetain = (buffer[index] & WILL_RETAIN_FLAG_MASK) != 0x00;
msg.willQosLevel = (byte)((buffer[index] & WILL_QOS_FLAG_MASK) >> WILL_QOS_FLAG_OFFSET);
msg.willFlag = (buffer[index] & WILL_FLAG_MASK) != 0x00;
msg.cleanSession = (buffer[index] & CLEAN_SESSION_FLAG_MASK) != 0x00;
index += CONNECT_FLAGS_SIZE;
// keep alive timer
msg.keepAlivePeriod = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.keepAlivePeriod |= buffer[index++];
// client identifier [v3.1.1] it may be zero bytes long (empty string)
clientIdUtf8Length = ((buffer[index++] << 8) & 0xFF00);
clientIdUtf8Length |= buffer[index++];
clientIdUtf8 = new byte[clientIdUtf8Length];
Array.Copy(buffer, index, clientIdUtf8, 0, clientIdUtf8Length);
index += clientIdUtf8Length;
msg.clientId = new String(Encoding.UTF8.GetChars(clientIdUtf8));
// [v3.1.1] if client identifier is zero bytes long, clean session must be true
if ((msg.protocolVersion == PROTOCOL_VERSION_V3_1_1) && (clientIdUtf8Length == 0) && (!msg.cleanSession))
{
throw new MqttClientException(MqttClientErrorCode.InvalidClientId);
}
// will topic and will message
if (msg.willFlag)
{
willTopicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
willTopicUtf8Length |= buffer[index++];
willTopicUtf8 = new byte[willTopicUtf8Length];
Array.Copy(buffer, index, willTopicUtf8, 0, willTopicUtf8Length);
index += willTopicUtf8Length;
msg.willTopic = new String(Encoding.UTF8.GetChars(willTopicUtf8));
willMessageUtf8Length = ((buffer[index++] << 8) & 0xFF00);
willMessageUtf8Length |= buffer[index++];
willMessageUtf8 = new byte[willMessageUtf8Length];
Array.Copy(buffer, index, willMessageUtf8, 0, willMessageUtf8Length);
index += willMessageUtf8Length;
msg.willMessage = new String(Encoding.UTF8.GetChars(willMessageUtf8));
}
// username
if (isUsernameFlag)
{
usernameUtf8Length = ((buffer[index++] << 8) & 0xFF00);
usernameUtf8Length |= buffer[index++];
usernameUtf8 = new byte[usernameUtf8Length];
Array.Copy(buffer, index, usernameUtf8, 0, usernameUtf8Length);
index += usernameUtf8Length;
msg.username = new String(Encoding.UTF8.GetChars(usernameUtf8));
}
// password
if (isPasswordFlag)
{
passwordUtf8Length = ((buffer[index++] << 8) & 0xFF00);
passwordUtf8Length |= buffer[index++];
passwordUtf8 = new byte[passwordUtf8Length];
Array.Copy(buffer, index, passwordUtf8, 0, passwordUtf8Length);
index += passwordUtf8Length;
msg.password = new String(Encoding.UTF8.GetChars(passwordUtf8));
}
return(msg);
}
/// <summary>
/// Parse bytes for a UNSUBSCRIBE message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>UNSUBSCRIBE message instance</returns>
public static MqttMsgUnsubscribe Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgUnsubscribe msg = new MqttMsgUnsubscribe();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_UNSUBSCRIBE_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
int received = channel.Receive(buffer);
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1)
{
// only 3.1.0
// read QoS level from fixed header
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);
// retain flag not used
msg.retain = false;
}
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
// payload contains topics
// NOTE : before, I don't know how many topics will be in the payload (so use List)
// if .Net Micro Framework
#if (MF_FRAMEWORK_VERSION_V4_2 || MF_FRAMEWORK_VERSION_V4_3 || NANOFRAMEWORK_V1_0)
IList tmpTopics = new ArrayList();
// else other frameworks (.Net, .Net Compact, Mono, Windows Phone)
#else
IList <String> tmpTopics = new List <String>();
#endif
do
{
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
tmpTopics.Add(new String(Encoding.UTF8.GetChars(topicUtf8)));
} while (index < remainingLength);
// copy from list to array
msg.topics = new string[tmpTopics.Count];
for (int i = 0; i < tmpTopics.Count; i++)
{
msg.topics[i] = (string)tmpTopics[i];
}
return(msg);
}
/// <summary>
/// Parse bytes for a PINGRESP message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PINGRESP message instance</returns>
public static MqttMsgPingResp Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
MqttMsgPingResp msg = new MqttMsgPingResp();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_PINGRESP_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// 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);
}
public static MqttMsgSubscribe Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
int num1 = 0;
MqttMsgSubscribe mqttMsgSubscribe1 = new MqttMsgSubscribe();
if (protocolVersion == (byte)4 && ((int)fixedHeaderFirstByte & 15) != 2)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
int length1 = MqttMsgBase.decodeRemainingLength(channel);
byte[] buffer = new byte[length1];
channel.Receive(buffer);
if (protocolVersion == (byte)3)
{
mqttMsgSubscribe1.qosLevel = checked ((byte)(((int)fixedHeaderFirstByte & 6) >> 1));
mqttMsgSubscribe1.dupFlag = ((int)fixedHeaderFirstByte & 8) >> 3 == 1;
mqttMsgSubscribe1.retain = false;
}
MqttMsgSubscribe mqttMsgSubscribe2 = mqttMsgSubscribe1;
byte[] numArray1 = buffer;
int index1 = num1;
int num2 = checked (index1 + 1);
int num3 = (int)checked ((ushort)((int)numArray1[index1] << 8 & 65280));
mqttMsgSubscribe2.messageId = (ushort)num3;
MqttMsgSubscribe mqttMsgSubscribe3 = mqttMsgSubscribe1;
int messageId = (int)mqttMsgSubscribe3.messageId;
byte[] numArray2 = buffer;
int index2 = num2;
int num4 = checked (index2 + 1);
int num5 = (int)numArray2[index2];
mqttMsgSubscribe3.messageId = (ushort)(messageId | num5);
IList <string> stringList = (IList <string>) new List <string>();
IList <byte> byteList1 = (IList <byte>) new List <byte>();
do
{
byte[] numArray3 = buffer;
int index3 = num4;
int num6 = checked (index3 + 1);
int num7 = (int)numArray3[index3] << 8 & 65280;
byte[] numArray4 = buffer;
int index4 = num6;
int sourceIndex = checked (index4 + 1);
int num8 = (int)numArray4[index4];
int length2 = num7 | num8;
byte[] bytes = new byte[length2];
Array.Copy((Array)buffer, sourceIndex, (Array)bytes, 0, length2);
int num9 = checked (sourceIndex + length2);
stringList.Add(new string(Encoding.UTF8.GetChars(bytes)));
IList <byte> byteList2 = byteList1;
byte[] numArray5 = buffer;
int index5 = num9;
num4 = checked (index5 + 1);
int num10 = (int)numArray5[index5];
byteList2.Add((byte)num10);
}while (num4 < length1);
mqttMsgSubscribe1.topics = new string[stringList.Count];
mqttMsgSubscribe1.qosLevels = new byte[byteList1.Count];
int index6 = 0;
while (index6 < stringList.Count)
{
mqttMsgSubscribe1.topics[index6] = stringList[index6];
mqttMsgSubscribe1.qosLevels[index6] = byteList1[index6];
checked { ++index6; }
}
return(mqttMsgSubscribe1);
}
/// <summary>
/// Parse bytes for a PUBLISH message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBLISH message instance</returns>
public static MqttMsgPublish Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgPublish msg = new MqttMsgPublish();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
int received = channel.Receive(buffer);
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
msg.topic = new String(Encoding.UTF8.GetChars(topicUtf8));
// read QoS level from fixed header
msg.qosLevel = (byte)((fixedHeaderFirstByte & QOS_LEVEL_MASK) >> QOS_LEVEL_OFFSET);
// check wrong QoS level (both bits can't be set 1)
if (msg.qosLevel > QOS_LEVEL_EXACTLY_ONCE)
throw new MqttClientException(MqttClientErrorCode.QosNotAllowed);
// read DUP flag from fixed header
msg.dupFlag = (((fixedHeaderFirstByte & DUP_FLAG_MASK) >> DUP_FLAG_OFFSET) == 0x01);
// read retain flag from fixed header
msg.retain = (((fixedHeaderFirstByte & RETAIN_FLAG_MASK) >> RETAIN_FLAG_OFFSET) == 0x01);
// message id is valid only with QOS level 1 or QOS level 2
if ((msg.qosLevel == QOS_LEVEL_AT_LEAST_ONCE) ||
(msg.qosLevel == QOS_LEVEL_EXACTLY_ONCE))
{
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
}
// get payload with message data
int messageSize = remainingLength - index;
int remaining = messageSize;
int messageOffset = 0;
msg.message = new byte[messageSize];
// BUG FIX 26/07/2013 : receiving large payload
// copy first part of payload data received
Array.Copy(buffer, index, msg.message, messageOffset, received - index);
remaining -= (received - index);
messageOffset += (received - index);
// if payload isn't finished
while (remaining > 0)
{
// receive other payload data
received = channel.Receive(buffer);
Array.Copy(buffer, 0, msg.message, messageOffset, received);
remaining -= received;
messageOffset += received;
}
return msg;
}
/// <summary>
/// Parse bytes for a SUBACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>SUBACK message instance</returns>
public static MqttMsgSuback Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttMsgSuback msg = new MqttMsgSuback();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_SUBACK_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// 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++]);
// payload contains QoS levels granted
msg.grantedQosLevels = new byte[remainingLength - MESSAGE_ID_SIZE];
int qosIdx = 0;
do
{
msg.grantedQosLevels[qosIdx++] = buffer[index++];
} while (index < remainingLength);
return(msg);
}
/// <summary>
/// Parse bytes for a PUBACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBACK message instance</returns>
public static MqttPublishAcknowledgeMessage Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttPublishAcknowledgeMessage msg = new MqttPublishAcknowledgeMessage();
if (protocolVersion == MqttConnectMessage.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_PUBACK_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// get remaining length and allocate buffer
int remainingLength = MqttMessage.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);
}
public MQTTAppClient(IMqttNetworkChannel channel) : base(channel)
{
}
/// <summary>
/// Parse bytes for a UNSUBSCRIBE message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>UNSUBSCRIBE message instance</returns>
public static MqttMsgUnsubscribe Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgUnsubscribe msg = new MqttMsgUnsubscribe();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_UNSUBSCRIBE_FLAG_BITS)
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
int received = channel.Receive(buffer);
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1)
{
// only 3.1.0
// read QoS level from fixed header
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);
// retain flag not used
msg.retain = false;
}
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
// payload contains topics
// NOTE : before, I don't know how many topics will be in the payload (so use List)
// if .Net Micro Framework
#if (MF_FRAMEWORK_VERSION_V4_2 || MF_FRAMEWORK_VERSION_V4_3)
IList tmpTopics = new ArrayList();
// else other frameworks (.Net, .Net Compact, Mono, Windows Phone)
#else
IList<String> tmpTopics = new List<String>();
#endif
do
{
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
tmpTopics.Add(new String(Encoding.UTF8.GetChars(topicUtf8)));
} while (index < remainingLength);
// copy from list to array
msg.topics = new string[tmpTopics.Count];
for (int i = 0; i < tmpTopics.Count; i++)
{
msg.topics[i] = (string)tmpTopics[i];
}
return msg;
}
public static MqttMsgConnect Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
int num1 = 0;
MqttMsgConnect mqttMsgConnect1 = new MqttMsgConnect();
byte[] buffer = new byte[MqttMsgBase.decodeRemainingLength(channel)];
channel.Receive(buffer);
byte[] numArray1 = buffer;
int index1 = num1;
int num2 = checked (index1 + 1);
int num3 = (int)numArray1[index1] << 8 & 65280;
byte[] numArray2 = buffer;
int index2 = num2;
int sourceIndex1 = checked (index2 + 1);
int num4 = (int)numArray2[index2];
int length1 = num3 | num4;
byte[] bytes1 = new byte[length1];
Array.Copy((Array)buffer, sourceIndex1, (Array)bytes1, 0, length1);
int index3 = checked (sourceIndex1 + length1);
mqttMsgConnect1.protocolName = new string(Encoding.UTF8.GetChars(bytes1));
if (!mqttMsgConnect1.protocolName.Equals("MQIsdp") && !mqttMsgConnect1.protocolName.Equals("MQTT"))
{
throw new MqttClientException(MqttClientErrorCode.InvalidProtocolName);
}
mqttMsgConnect1.protocolVersion = buffer[index3];
int index4 = checked (index3 + 1);
if (mqttMsgConnect1.protocolVersion == (byte)4 && ((uint)buffer[index4] & 1U) > 0U)
{
throw new MqttClientException(MqttClientErrorCode.InvalidConnectFlags);
}
bool flag1 = ((uint)buffer[index4] & 128U) > 0U;
bool flag2 = ((uint)buffer[index4] & 64U) > 0U;
mqttMsgConnect1.willRetain = ((uint)buffer[index4] & 32U) > 0U;
mqttMsgConnect1.willQosLevel = checked ((byte)(((int)buffer[index4] & 24) >> 3));
mqttMsgConnect1.willFlag = ((uint)buffer[index4] & 4U) > 0U;
mqttMsgConnect1.cleanSession = ((uint)buffer[index4] & 2U) > 0U;
int num5 = checked (index4 + 1);
MqttMsgConnect mqttMsgConnect2 = mqttMsgConnect1;
byte[] numArray3 = buffer;
int index5 = num5;
int num6 = checked (index5 + 1);
int num7 = (int)checked ((ushort)((int)numArray3[index5] << 8 & 65280));
mqttMsgConnect2.keepAlivePeriod = (ushort)num7;
MqttMsgConnect mqttMsgConnect3 = mqttMsgConnect1;
int keepAlivePeriod = (int)mqttMsgConnect3.keepAlivePeriod;
byte[] numArray4 = buffer;
int index6 = num6;
int num8 = checked (index6 + 1);
int num9 = (int)numArray4[index6];
mqttMsgConnect3.keepAlivePeriod = (ushort)(keepAlivePeriod | num9);
byte[] numArray5 = buffer;
int index7 = num8;
int num10 = checked (index7 + 1);
int num11 = (int)numArray5[index7] << 8 & 65280;
byte[] numArray6 = buffer;
int index8 = num10;
int sourceIndex2 = checked (index8 + 1);
int num12 = (int)numArray6[index8];
int length2 = num11 | num12;
byte[] bytes2 = new byte[length2];
Array.Copy((Array)buffer, sourceIndex2, (Array)bytes2, 0, length2);
int num13 = checked (sourceIndex2 + length2);
mqttMsgConnect1.clientId = new string(Encoding.UTF8.GetChars(bytes2));
if (mqttMsgConnect1.protocolVersion == (byte)4 && length2 == 0 && !mqttMsgConnect1.cleanSession)
{
throw new MqttClientException(MqttClientErrorCode.InvalidClientId);
}
if (mqttMsgConnect1.willFlag)
{
byte[] numArray7 = buffer;
int index9 = num13;
int num14 = checked (index9 + 1);
int num15 = (int)numArray7[index9] << 8 & 65280;
byte[] numArray8 = buffer;
int index10 = num14;
int sourceIndex3 = checked (index10 + 1);
int num16 = (int)numArray8[index10];
int length3 = num15 | num16;
byte[] bytes3 = new byte[length3];
Array.Copy((Array)buffer, sourceIndex3, (Array)bytes3, 0, length3);
int num17 = checked (sourceIndex3 + length3);
mqttMsgConnect1.willTopic = new string(Encoding.UTF8.GetChars(bytes3));
byte[] numArray9 = buffer;
int index11 = num17;
int num18 = checked (index11 + 1);
int num19 = (int)numArray9[index11] << 8 & 65280;
byte[] numArray10 = buffer;
int index12 = num18;
int sourceIndex4 = checked (index12 + 1);
int num20 = (int)numArray10[index12];
int length4 = num19 | num20;
byte[] bytes4 = new byte[length4];
Array.Copy((Array)buffer, sourceIndex4, (Array)bytes4, 0, length4);
num13 = checked (sourceIndex4 + length4);
mqttMsgConnect1.willMessage = new string(Encoding.UTF8.GetChars(bytes4));
}
if (flag1)
{
byte[] numArray7 = buffer;
int index9 = num13;
int num14 = checked (index9 + 1);
int num15 = (int)numArray7[index9] << 8 & 65280;
byte[] numArray8 = buffer;
int index10 = num14;
int sourceIndex3 = checked (index10 + 1);
int num16 = (int)numArray8[index10];
int length3 = num15 | num16;
byte[] bytes3 = new byte[length3];
Array.Copy((Array)buffer, sourceIndex3, (Array)bytes3, 0, length3);
num13 = checked (sourceIndex3 + length3);
mqttMsgConnect1.username = new string(Encoding.UTF8.GetChars(bytes3));
}
if (flag2)
{
byte[] numArray7 = buffer;
int index9 = num13;
int num14 = checked (index9 + 1);
int num15 = (int)numArray7[index9] << 8 & 65280;
byte[] numArray8 = buffer;
int index10 = num14;
int sourceIndex3 = checked (index10 + 1);
int num16 = (int)numArray8[index10];
int length3 = num15 | num16;
byte[] bytes3 = new byte[length3];
Array.Copy((Array)buffer, sourceIndex3, (Array)bytes3, 0, length3);
int num17 = checked (sourceIndex3 + length3);
mqttMsgConnect1.password = new string(Encoding.UTF8.GetChars(bytes3));
}
return(mqttMsgConnect1);
}
public static MqttMsgPuback Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
int num1 = 0;
MqttMsgPuback mqttMsgPuback1 = new MqttMsgPuback();
if (protocolVersion == (byte)4 && ((uint)fixedHeaderFirstByte & 15U) > 0U)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
byte[] buffer = new byte[MqttMsgBase.decodeRemainingLength(channel)];
channel.Receive(buffer);
MqttMsgPuback mqttMsgPuback2 = mqttMsgPuback1;
byte[] numArray1 = buffer;
int index1 = num1;
int num2 = checked (index1 + 1);
int num3 = (int)checked ((ushort)((int)numArray1[index1] << 8 & 65280));
mqttMsgPuback2.messageId = (ushort)num3;
MqttMsgPuback mqttMsgPuback3 = mqttMsgPuback1;
int messageId = (int)mqttMsgPuback3.messageId;
byte[] numArray2 = buffer;
int index2 = num2;
int num4 = checked (index2 + 1);
int num5 = (int)numArray2[index2];
mqttMsgPuback3.messageId = (ushort)(messageId | num5);
return(mqttMsgPuback1);
}
/// <summary>
/// Parse bytes for a SUBACK message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">MQTT Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>SUBACK message instance</returns>
public static MqttMsgSuback Parse(byte fixedHeaderFirstByte, MqttProtocolVersion protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttMsgSuback msg = new MqttMsgSuback();
if ((protocolVersion == MqttProtocolVersion.Version_3_1_1) || (protocolVersion == MqttProtocolVersion.Version_5))
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_SUBACK_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// get remaining length and allocate buffer
int remainingLength = DecodeVariableByte(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++]);
if ((protocolVersion == MqttProtocolVersion.Version_5) && (index < buffer.Length))
{
// size of the properties
int propSize = EncodeDecodeHelper.GetPropertySize(buffer, ref index);
propSize += index;
MqttProperty prop;
while (propSize > index)
{
prop = (MqttProperty)buffer[index++];
switch (prop)
{
case MqttProperty.ReasonString:
// UTF8 encoded
msg.Reason = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.UserProperty:
// UTF8 key value encoding, so 2 strings in a raw
string key = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
string value = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
msg.UserProperties.Add(new UserProperty(key, value));
break;
default:
// non supported property
index = propSize;
break;
}
}
}
// payload contains QoS levels granted
msg.GrantedQoSLevels = new MqttQoSLevel[remainingLength - index];
if (protocolVersion == MqttProtocolVersion.Version_5)
{
msg.ReasonCodes = new MqttReasonCode[remainingLength - index];
}
int qosIdx = 0;
do
{
if (protocolVersion == MqttProtocolVersion.Version_5)
{
msg.ReasonCodes[qosIdx] = (MqttReasonCode)buffer[index];
}
msg.GrantedQoSLevels[qosIdx++] = (MqttQoSLevel)buffer[index++];
} while (index < remainingLength);
return(msg);
}
/// <summary>
/// Parse bytes for a PUBLISH message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBLISH message instance</returns>
public static MqttMsgPublish Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgPublish msg = new MqttMsgPublish();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
int received = channel.Receive(buffer);
// topic name
topicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
topicUtf8Length |= buffer[index++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, index, topicUtf8, 0, topicUtf8Length);
index += topicUtf8Length;
msg.topic = new String(Encoding.UTF8.GetChars(topicUtf8));
// read QoS level from fixed header
msg.qosLevel = (byte)((fixedHeaderFirstByte & QOS_LEVEL_MASK) >> QOS_LEVEL_OFFSET);
// check wrong QoS level (both bits can't be set 1)
if (msg.qosLevel > QOS_LEVEL_EXACTLY_ONCE)
{
throw new MqttClientException(MqttClientErrorCode.QosNotAllowed);
}
// read DUP flag from fixed header
msg.dupFlag = (((fixedHeaderFirstByte & DUP_FLAG_MASK) >> DUP_FLAG_OFFSET) == 0x01);
// read retain flag from fixed header
msg.retain = (((fixedHeaderFirstByte & RETAIN_FLAG_MASK) >> RETAIN_FLAG_OFFSET) == 0x01);
// message id is valid only with QOS level 1 or QOS level 2
if ((msg.qosLevel == QOS_LEVEL_AT_LEAST_ONCE) ||
(msg.qosLevel == QOS_LEVEL_EXACTLY_ONCE))
{
// message id
msg.messageId = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.messageId |= (buffer[index++]);
}
// get payload with message data
int messageSize = remainingLength - index;
int remaining = messageSize;
int messageOffset = 0;
msg.message = new byte[messageSize];
// BUG FIX 26/07/2013 : receiving large payload
// copy first part of payload data received
Array.Copy(buffer, index, msg.message, messageOffset, received - index);
remaining -= (received - index);
messageOffset += (received - index);
// if payload isn't finished
while (remaining > 0)
{
// receive other payload data
received = channel.Receive(buffer);
Array.Copy(buffer, 0, msg.message, messageOffset, received);
remaining -= received;
messageOffset += received;
}
return(msg);
}
/// <summary>
/// Parse bytes for a UNSUBSCRIBE message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">MQTT Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>UNSUBSCRIBE message instance</returns>
public static MqttMsgUnsubscribe Parse(byte fixedHeaderFirstByte, MqttProtocolVersion protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int indexUnsub = 0;
byte[] topicUtf8;
int topicUtf8Length;
MqttMsgUnsubscribe msg = new MqttMsgUnsubscribe();
if (protocolVersion == MqttProtocolVersion.Version_3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_UNSUBSCRIBE_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// get remaining length and allocate buffer
int remainingLength = DecodeVariableByte(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
if (protocolVersion == MqttProtocolVersion.Version_3_1)
{
// only 3.1.0
// read QoS level from fixed header
msg.QosLevel = (MqttQoSLevel)((fixedHeaderFirstByte & QOS_LEVEL_MASK) >> QOS_LEVEL_OFFSET);
// read DUP flag from fixed header
msg.DupFlag = (((fixedHeaderFirstByte & DUP_FLAG_MASK) >> DUP_FLAG_OFFSET) == 0x01);
// retain flag not used
msg.Retain = false;
}
// message id
msg.MessageId = (ushort)((buffer[indexUnsub++] << 8) & 0xFF00);
msg.MessageId |= buffer[indexUnsub++];
if (protocolVersion == MqttProtocolVersion.Version_5)
{
// size of the properties
int propSize = EncodeDecodeHelper.GetPropertySize(buffer, ref indexUnsub);
propSize += indexUnsub;
MqttProperty prop;
while (propSize > indexUnsub)
{
prop = (MqttProperty)buffer[indexUnsub++];
switch (prop)
{
case MqttProperty.UserProperty:
// UTF8 key value encoding, so 2 strings in a raw
string key = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref indexUnsub);
string value = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref indexUnsub);
msg.UserProperties.Add(new UserProperty(key, value));
break;
default:
// non supported property
indexUnsub = propSize;
break;
}
}
}
// payload contains topics
// NOTE : before, I don't know how many topics will be in the payload (so use List)
IList tmpTopics = new ArrayList();
do
{
// topic name
topicUtf8Length = ((buffer[indexUnsub++] << 8) & 0xFF00);
topicUtf8Length |= buffer[indexUnsub++];
topicUtf8 = new byte[topicUtf8Length];
Array.Copy(buffer, indexUnsub, topicUtf8, 0, topicUtf8Length);
indexUnsub += topicUtf8Length;
tmpTopics.Add(Encoding.UTF8.GetString(topicUtf8, 0, topicUtf8.Length));
} while (indexUnsub < remainingLength);
// copy from list to array
msg.Topics = new string[tmpTopics.Count];
for (int i = 0; i < tmpTopics.Count; i++)
{
msg.Topics[i] = (string)tmpTopics[i];
}
return(msg);
}
/// <summary>
/// Parse bytes for a PUBREL message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBREL message instance</returns>
public static MqttMsgPubrel Parse(byte fixedHeaderFirstByte, byte protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttMsgPubrel msg = new MqttMsgPubrel();
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1_1)
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_PUBREL_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
if (protocolVersion == MqttMsgConnect.PROTOCOL_VERSION_V3_1)
{
// only 3.1.0
// 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 CONNECT message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>CONNECT message instance</returns>
public static MqttMsgConnect Parse(byte fixedHeaderFirstByte, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
int protNameUtf8Length;
byte[] protNameUtf8;
bool isUsernameFlag;
bool isPasswordFlag;
int clientIdUtf8Length;
byte[] clientIdUtf8;
int willTopicUtf8Length;
byte[] willTopicUtf8;
int willMessageUtf8Length;
byte[] willMessageUtf8;
int usernameUtf8Length;
byte[] usernameUtf8;
int passwordUtf8Length;
byte[] passwordUtf8;
MqttMsgConnect msg = new MqttMsgConnect();
// get remaining length and allocate buffer
int remainingLength = MqttMsgBase.decodeRemainingLength(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
// protocol name
protNameUtf8Length = ((buffer[index++] << 8) & 0xFF00);
protNameUtf8Length |= buffer[index++];
protNameUtf8 = new byte[protNameUtf8Length];
Array.Copy(buffer, index, protNameUtf8, 0, protNameUtf8Length);
index += protNameUtf8Length;
msg.protocolName = new String(Encoding.UTF8.GetChars(protNameUtf8));
// protocol version
msg.protocolVersion = buffer[index];
index += PROTOCOL_VERSION_NUMBER_SIZE;
// connect flags
isUsernameFlag = (buffer[index] & USERNAME_FLAG_MASK) != 0x00;
isPasswordFlag = (buffer[index] & PASSWORD_FLAG_MASK) != 0x00;
msg.willRetain = (buffer[index] & WILL_RETAIN_FLAG_MASK) != 0x00;
msg.willQosLevel = (byte)((buffer[index] & WILL_QOS_FLAG_MASK) >> WILL_QOS_FLAG_OFFSET);
msg.willFlag = (buffer[index] & WILL_FLAG_MASK) != 0x00;
msg.cleanSession = (buffer[index] & CLEAN_SESSION_FLAG_MASK) != 0x00;
index += CONNECT_FLAGS_SIZE;
// keep alive timer
msg.keepAlivePeriod = (ushort)((buffer[index++] << 8) & 0xFF00);
msg.keepAlivePeriod |= buffer[index++];
// client identifier
clientIdUtf8Length = ((buffer[index++] << 8) & 0xFF00);
clientIdUtf8Length |= buffer[index++];
clientIdUtf8 = new byte[clientIdUtf8Length];
Array.Copy(buffer, index, clientIdUtf8, 0, clientIdUtf8Length);
index += clientIdUtf8Length;
msg.clientId = new String(Encoding.UTF8.GetChars(clientIdUtf8));
// will topic and will message
if (msg.willFlag)
{
willTopicUtf8Length = ((buffer[index++] << 8) & 0xFF00);
willTopicUtf8Length |= buffer[index++];
willTopicUtf8 = new byte[willTopicUtf8Length];
Array.Copy(buffer, index, willTopicUtf8, 0, willTopicUtf8Length);
index += willTopicUtf8Length;
msg.willTopic = new String(Encoding.UTF8.GetChars(willTopicUtf8));
willMessageUtf8Length = ((buffer[index++] << 8) & 0xFF00);
willMessageUtf8Length |= buffer[index++];
willMessageUtf8 = new byte[willMessageUtf8Length];
Array.Copy(buffer, index, willMessageUtf8, 0, willMessageUtf8Length);
index += willMessageUtf8Length;
msg.willMessage = new String(Encoding.UTF8.GetChars(willMessageUtf8));
}
// username
if (isUsernameFlag)
{
usernameUtf8Length = ((buffer[index++] << 8) & 0xFF00);
usernameUtf8Length |= buffer[index++];
usernameUtf8 = new byte[usernameUtf8Length];
Array.Copy(buffer, index, usernameUtf8, 0, usernameUtf8Length);
index += usernameUtf8Length;
msg.username = new String(Encoding.UTF8.GetChars(usernameUtf8));
}
// password
if (isPasswordFlag)
{
passwordUtf8Length = ((buffer[index++] << 8) & 0xFF00);
passwordUtf8Length |= buffer[index++];
passwordUtf8 = new byte[passwordUtf8Length];
Array.Copy(buffer, index, passwordUtf8, 0, passwordUtf8Length);
index += passwordUtf8Length;
msg.password = new String(Encoding.UTF8.GetChars(passwordUtf8));
}
return msg;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="socket">Raw socket for communication</param>
public MqttClient(Socket socket)
{
this.channel = new MqttNetworkChannel(socket);
// reference to MQTT settings
this.settings = MqttSettings.Instance;
// client not connected yet (CONNACK not send from client), some default values
this.IsConnected = false;
this.ClientId = null;
this.CleanSession = true;
this.keepAliveEvent = new AutoResetEvent(false);
// queue for handling inflight messages (publishing and acknowledge)
this.inflightWaitHandle = new AutoResetEvent(false);
this.inflightQueue = new Queue();
// queue for received message
this.receiveEventWaitHandle = new AutoResetEvent(false);
this.receiveQueue = new Queue();
this.internalQueue = new Queue();
}
/// <summary>
/// Parse bytes for a PUBREL message
/// </summary>
/// <param name="fixedHeaderFirstByte">First fixed header byte</param>
/// <param name="protocolVersion">MQTT Protocol Version</param>
/// <param name="channel">Channel connected to the broker</param>
/// <returns>PUBREL message instance</returns>
public static MqttMsgPubrel Parse(byte fixedHeaderFirstByte, MqttProtocolVersion protocolVersion, IMqttNetworkChannel channel)
{
byte[] buffer;
int index = 0;
MqttMsgPubrel msg = new MqttMsgPubrel();
if ((protocolVersion == MqttProtocolVersion.Version_3_1_1) || (protocolVersion == MqttProtocolVersion.Version_5))
{
// [v3.1.1] check flag bits
if ((fixedHeaderFirstByte & MSG_FLAG_BITS_MASK) != MQTT_MSG_PUBREL_FLAG_BITS)
{
throw new MqttClientException(MqttClientErrorCode.InvalidFlagBits);
}
}
// get remaining length and allocate buffer
int remainingLength = DecodeVariableByte(channel);
buffer = new byte[remainingLength];
// read bytes from socket...
channel.Receive(buffer);
if (protocolVersion == MqttProtocolVersion.Version_3_1)
{
// only 3.1.0
// read QoS level from fixed header (would be QoS Level 1)
msg.QosLevel = (MqttQoSLevel)((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++];
if (protocolVersion == MqttProtocolVersion.Version_5)
{
msg.ReasonCode = (MqttReasonCode)buffer[index++];
// size of the properties
int propSize = EncodeDecodeHelper.GetPropertySize(buffer, ref index);
propSize += index;
MqttProperty prop;
while (propSize > index)
{
prop = (MqttProperty)buffer[index++];
switch (prop)
{
case MqttProperty.ReasonString:
// UTF8 encoded
msg.Reason = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
break;
case MqttProperty.UserProperty:
// UTF8 key value encoding, so 2 strings in a raw
string key = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
string value = EncodeDecodeHelper.GetUTF8FromBuffer(buffer, ref index);
msg.UserProperties.Add(new UserProperty(key, value));
break;
default:
// non supported property
index = propSize;
break;
}
}
}
return(msg);
}