Function libzt::zts_net_compute_adhoc_id

pub unsafe extern "C" fn zts_net_compute_adhoc_id(
    start_port: u16, 
    end_port: u16
) -> u64

@brief Compute RFC4193 IPv6 address for the given Network ID and Node ID

Ad-hoc Network:

ffSSSSEEEE000000
| |   |   |
| |   |   Reserved for future use, must be 0
| |   End of port range (hex)
| Start of port range (hex)
Reserved ZeroTier address prefix indicating a controller-less network.

Ad-hoc networks are public (no access control) networks that have no network controller. Instead their configuration and other credentials are generated locally. Ad-hoc networks permit only IPv6 UDP and TCP unicast traffic (no multicast or broadcast) using 6plane format NDP-emulated IPv6 addresses. In addition an ad-hoc network ID encodes an IP port range. UDP packets and TCP SYN (connection open) packets are only allowed to destination ports within the encoded range.

For example ff00160016000000 is an ad-hoc network allowing only SSH, while ff0000ffff000000 is an ad-hoc network allowing any UDP or TCP port.

Keep in mind that these networks are public and anyone in the entire world can join them. Care must be taken to avoid exposing vulnerable services or sharing unwanted files or other resources.

@param start_port Start of port allowed port range @param end_port End of allowed port range @return An Ad-hoc network ID