UDP multicast various levels of verbosity.

[toolslive]

Both simulators and the real drives perform regular UDP multicasts to announce their availability.
However, they seem to have varying attribute sets.
The json for the simulator looks like this:

{ "firmware_version":"0.8.0.4-SNAPSHOT",
    "manufacturer":"Seagate",
    "model":"Simulator",
    "network_interfaces":[{"ipv4_addr":"....", "mac_addr":".....","name":"..."}, ...],
    "port":8000,
    "protocol_version":"3.0.6",
    "serial_number":"S810200476",
    "tlsPort":9000,
    "world_wide_name":"0c5dfdf2-2b52-4290-a922-f7c42a1e6e8d"
}

The set of included attributes differs between various drives.
The most succinct set I've been able to capture is this:

{"network_interfaces":[{"ipv4_addr":"...", "ipv6_addr":"...", "mac_addr":"...","name":"..."},...],
 "port":8123,
 "tlsPort":8443}

This raises the question: what is the current set of attributes that is guaranteed to be present?
We are especially interested in the world_wide_name name field. If that's not present we need to connect to the drive to establish its identity.