Wireshark-MQTT

MQTT dissector for Wireshark was developed for debugging libemqtt (https://github.com/menudoproblema/libemqtt)

Usage

$ wireshark -X lua_script:mqtt.lua

If you want to install this as a plugin just copy the mqtt.lua to a wireshark plugin folder. In windows this could be %APPDATA%\Wireshark\plugins

Example

MQ Telemetry Transport, Message Type: CONNECT, QoS: 0 > Fixed Header 0001 .... = Message Type: 0x01 .... 0... = DUP Flag: 0 .... .00. = QoS Level: 0 .... ...0 = Retain: 0 Remain Length: 36

> Variable Header
	Protocol Name: MQIsdp
	Protocol Version: 3
	> Flags
		1... .... = Username Flag: 1
		.0.. .... = Password Flag: 0
		..0. .... = Will Retain Flag: 0
		...0 0... = Will QoS Flag: 0
		.... .0.. = Will Flag: 0
		.... ..1. = Clean Session Flag: 1
	Keep Alive (secs): 300

> Payload
	Client ID: libemqtt pub
	Username: username