Module paho_mqtt::errors

The MQTT errors

Enums

• Error
  The errors from an MQTT operation.

Constants

• BadMqttOption
  Using an option for a different version of MQTT than the client or connection is currently using.
• BadProtocol
  Protocol prefix in serverURI must be “tcp://”, “ssl://”, “ws://”, or “wss://” The TLS enabled prefixes (ssl, wss) are only valid when using the AAL/TLS version of the library.
• BadQos
  A qos parameter is not 0, 1 or 2
• BadStructure
  A structure parameter does not have the correct eyecatcher and version number.
• BadUtfString
  An invalid UTF-8 string has been detected.
• Disconnected
  The client is disconnected
• Failure
  A generic error code indicating the failure of an MQTT client operation
• MaxBufferedMessages
  No more messages can be buffered
• MaxMessagesInflight
  The maximum number of messages allowed to be simultaneously in-flight has been reached.
• NoMoreMsgids
  All 65535 MQTT msgids are being used
• NullParameter
  A NULL parameter has been supplied when this is invalid.
• OperationIncomplete
  The request is being discarded when not complete
• PersistenceError
  An error in the message persistence
• SslNotSupported
  Attempting SSL connection using non-SSL version of library
• TopicNameTruncated
  The topic has been truncated (the topic string includes embedded NULL characters). String functions will not access the full topic. Use the topic length value to access the full topic.
• WrongMqttVersion
  Call not applicable to the current version of MQTT in use.
• ZeroLenWillTopic
  Zero-length will topics not supported.

Functions

• error_message
  Gets the string associated with the error code from the C lib.

Type Aliases

• Result
  The result type for MQTT operations.