MQTTReasonCodes.h(3)

📦
version 1.3.16 · 7 versions
, in fedora 44

💖 MQTTReasonCodes.h(3) — Library Functions Manual 💖

okay bestie, sit down, hydrate, and let me tell you about MQTTReasonCodes.h — it's the header that holds every single MQTT V5 reason code, and honestly? she's giving ✨reference material✨ in the best way.

🎀 NAME

MQTTReasonCodes.h — the glow-up glossary of MQTT V5 reason codes, no cap 🫶

✨ SYNOPSIS

#include 'MQTTExportDeclarations.h'

🌸 Enumerations

enum MQTTReasonCodes { MQTTREASONCODE_SUCCESS = 0,
    MQTTREASONCODE_NORMAL_DISCONNECTION = 0,
    MQTTREASONCODE_GRANTED_QOS_0 = 0, MQTTREASONCODE_GRANTED_QOS_1 = 1,
    MQTTREASONCODE_GRANTED_QOS_2 = 2,
    MQTTREASONCODE_DISCONNECT_WITH_WILL_MESSAGE = 4,
    MQTTREASONCODE_NO_MATCHING_SUBSCRIBERS = 16,
    MQTTREASONCODE_NO_SUBSCRIPTION_FOUND = 17,
    MQTTREASONCODE_CONTINUE_AUTHENTICATION = 24,
    MQTTREASONCODE_RE_AUTHENTICATE = 25,
    MQTTREASONCODE_UNSPECIFIED_ERROR = 128,
    MQTTREASONCODE_MALFORMED_PACKET = 129, MQTTREASONCODE_PROTOCOL_ERROR
    = 130, MQTTREASONCODE_IMPLEMENTATION_SPECIFIC_ERROR = 131,
    MQTTREASONCODE_UNSUPPORTED_PROTOCOL_VERSION = 132,
    MQTTREASONCODE_CLIENT_IDENTIFIER_NOT_VALID = 133,
    MQTTREASONCODE_BAD_USER_NAME_OR_PASSWORD = 134,
    MQTTREASONCODE_NOT_AUTHORIZED = 135,
    MQTTREASONCODE_SERVER_UNAVAILABLE = 136, MQTTREASONCODE_SERVER_BUSY
    = 137, MQTTREASONCODE_BANNED = 138,
    MQTTREASONCODE_SERVER_SHUTTING_DOWN = 139,
    MQTTREASONCODE_BAD_AUTHENTICATION_METHOD = 140,
    MQTTREASONCODE_KEEP_ALIVE_TIMEOUT = 141,
    MQTTREASONCODE_SESSION_TAKEN_OVER = 142,
    MQTTREASONCODE_TOPIC_FILTER_INVALID = 143,
    MQTTREASONCODE_TOPIC_NAME_INVALID = 144,
    MQTTREASONCODE_PACKET_IDENTIFIER_IN_USE = 145,
    MQTTREASONCODE_PACKET_IDENTIFIER_NOT_FOUND = 146,
    MQTTREASONCODE_RECEIVE_MAXIMUM_EXCEEDED = 147,
    MQTTREASONCODE_TOPIC_ALIAS_INVALID = 148,
    MQTTREASONCODE_PACKET_TOO_LARGE = 149,
    MQTTREASONCODE_MESSAGE_RATE_TOO_HIGH = 150,
    MQTTREASONCODE_QUOTA_EXCEEDED = 151,
    MQTTREASONCODE_ADMINISTRATIVE_ACTION = 152,
    MQTTREASONCODE_PAYLOAD_FORMAT_INVALID = 153,
    MQTTREASONCODE_RETAIN_NOT_SUPPORTED = 154,
    MQTTREASONCODE_QOS_NOT_SUPPORTED = 155,
    MQTTREASONCODE_USE_ANOTHER_SERVER = 156, MQTTREASONCODE_SERVER_MOVED
    = 157, MQTTREASONCODE_SHARED_SUBSCRIPTIONS_NOT_SUPPORTED = 158,
    MQTTREASONCODE_CONNECTION_RATE_EXCEEDED = 159,
    MQTTREASONCODE_MAXIMUM_CONNECT_TIME = 160,
    MQTTREASONCODE_SUBSCRIPTION_IDENTIFIERS_NOT_SUPPORTED = 161,
    MQTTREASONCODE_WILDCARD_SUBSCRIPTIONS_NOT_SUPPORTED = 162 }

🦋 Functions

const char * MQTTReasonCode_toString (enum MQTTReasonCodes value)

🔥 Enumeration Type Documentation

enum MQTTReasonCodes

The MQTT V5 one byte reason code. that's it, that's the whole description, one byte of pure communication 😌

💜 Enumerator

here's the full roster, in order, zero skips, we do NOT gatekeep:

  • MQTTREASONCODE_SUCCESS
  • MQTTREASONCODE_NORMAL_DISCONNECTION
  • MQTTREASONCODE_GRANTED_QOS_0
  • MQTTREASONCODE_GRANTED_QOS_1
  • MQTTREASONCODE_GRANTED_QOS_2
  • MQTTREASONCODE_DISCONNECT_WITH_WILL_MESSAGE
  • MQTTREASONCODE_NO_MATCHING_SUBSCRIBERS
  • MQTTREASONCODE_NO_SUBSCRIPTION_FOUND
  • MQTTREASONCODE_CONTINUE_AUTHENTICATION
  • MQTTREASONCODE_RE_AUTHENTICATE
  • MQTTREASONCODE_UNSPECIFIED_ERROR
  • MQTTREASONCODE_MALFORMED_PACKET
  • MQTTREASONCODE_PROTOCOL_ERROR
  • MQTTREASONCODE_IMPLEMENTATION_SPECIFIC_ERROR
  • MQTTREASONCODE_UNSUPPORTED_PROTOCOL_VERSION
  • MQTTREASONCODE_CLIENT_IDENTIFIER_NOT_VALID
  • MQTTREASONCODE_BAD_USER_NAME_OR_PASSWORD
  • MQTTREASONCODE_NOT_AUTHORIZED
  • MQTTREASONCODE_SERVER_UNAVAILABLE
  • MQTTREASONCODE_SERVER_BUSY
  • MQTTREASONCODE_BANNED
  • MQTTREASONCODE_SERVER_SHUTTING_DOWN
  • MQTTREASONCODE_BAD_AUTHENTICATION_METHOD
  • MQTTREASONCODE_KEEP_ALIVE_TIMEOUT
  • MQTTREASONCODE_SESSION_TAKEN_OVER
  • MQTTREASONCODE_TOPIC_FILTER_INVALID
  • MQTTREASONCODE_TOPIC_NAME_INVALID
  • MQTTREASONCODE_PACKET_IDENTIFIER_IN_USE
  • MQTTREASONCODE_PACKET_IDENTIFIER_NOT_FOUND
  • MQTTREASONCODE_RECEIVE_MAXIMUM_EXCEEDED
  • MQTTREASONCODE_TOPIC_ALIAS_INVALID
  • MQTTREASONCODE_PACKET_TOO_LARGE
  • MQTTREASONCODE_MESSAGE_RATE_TOO_HIGH
  • MQTTREASONCODE_QUOTA_EXCEEDED
  • MQTTREASONCODE_ADMINISTRATIVE_ACTION
  • MQTTREASONCODE_PAYLOAD_FORMAT_INVALID
  • MQTTREASONCODE_RETAIN_NOT_SUPPORTED
  • MQTTREASONCODE_QOS_NOT_SUPPORTED
  • MQTTREASONCODE_USE_ANOTHER_SERVER
  • MQTTREASONCODE_SERVER_MOVED
  • MQTTREASONCODE_SHARED_SUBSCRIPTIONS_NOT_SUPPORTED
  • MQTTREASONCODE_CONNECTION_RATE_EXCEEDED
  • MQTTREASONCODE_MAXIMUM_CONNECT_TIME
  • MQTTREASONCODE_SUBSCRIPTION_IDENTIFIERS_NOT_SUPPORTED
  • MQTTREASONCODE_WILDCARD_SUBSCRIPTIONS_NOT_SUPPORTED
fr fr, the docs just list the names here — the numbers live up in the enum declaration, so scroll back up if you need the digits 👀

🌈 Function Documentation

const char * MQTTReasonCode_toString (enum MQTTReasonCodes value) [extern]

Returns a printable string description of an MQTT V5 reason code. she translates the byte into something your eyeballs can actually read, iconic behavior 💅

Parameters

  • value — an MQTT V5 reason code.

Returns

  • the printable string description of the input reason code. NULL if the code was not found.
lowkey important: that NULL return is your "girl, I've never heard of this one" signal, so always check before you go printing it 🫶

👑 Author

Generated automatically by Doxygen for Paho MQTT C Client Library from the source code. yes, a robot wrote it, and yes, she ate 🤖✨

and that's the whole page bestie! this one's from the Paho MQTT C Client Library, dated Tue Jun 2 2026 00:00:00 — go forth and decode those reason codes, you absolute main character 🎀💖🦋 periodt.

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