Wireshark Plugin ANT+ Dissector

antplus.lua

-- requires https://github.com/Snaipe/wssdl/releases/download/v0.2.0/wssdl.lua
local wssdl = require 'wssdl'

ant_msg = wssdl.packet {
    sync:u8():hex(),
    length:u8(),
    class:u8():hex(),
    payload:payload({ class, 'antplus.class' }, length * 8),
    checksum:u8():hex()
}

ant_broadcast_event = wssdl.packet {
    channel:u8(),
    payload:bytes(8),
    extendedFlag:u8():hex(),
    deviceNumber:u16():le(),
    deviceType:u8():hex(),
    transmissionType:u8():hex(),
    --rssiMeasurementType:u8():hex(),
    --rssi:u8(),
    --rssiThreshold:u8(),
    --rxTimestamp:u16():le(),
}

ant_power_msg = wssdl.packet {
    page:u8(),
    eventCount:u8(),
    unknown:u8(),
    instantaneousCadence:u8(),
    accumulatedPower:u16(),
    instantaneousPower:u16(),
}

wssdl.dissect {
    usb.bulk:add {
        [0xFFFF] = ant_msg:proto('antplus', 'ANT+ Protocol')
    },
    antplus.class:add {
        [0x4E] = ant_broadcast_event:proto('antplus_broadcast_event', 'ANT+ Broadcast Event')
    },
    --antplus_broadcast_event.deviceType:add {
    --    [0x0B] = ant_power_msg:proto('antplus_power_meter', 'ANT+ Power Meter')
    --},
}