op-packages/safeshield/files/usr/libexec/safeshield-stats-identities

#!/usr/bin/ucode
'use strict';

const ubus = require('ubus');

function clean(value) {
    return replace(sprintf('%s', value || ''), /[\t\r\n]/g, '_');
}

function main() {
    let conn = ubus.connect();
    if (!conn) {
        return;
    }

    let data = conn.call('dhcp', 'ipv6leases', {});
    if (type(data) != 'object' || type(data.device) != 'object') {
        conn.disconnect();
        return;
    }

    for (let _, device in data.device) {
        if (type(device) != 'object' || type(device.leases) != 'array') {
            continue;
        }

        for (let lease in device.leases) {
            if (type(lease) != 'object') {
                continue;
            }

            let duid = lc(clean(lease.duid));
            let hostname = clean(lease.hostname);
            let addresses = lease['ipv6-addr'];
            if (!duid || type(addresses) != 'array') {
                continue;
            }

            for (let address in addresses) {
                if (type(address) != 'object') {
                    continue;
                }
                let ip = clean(address.address);
                if (ip) {
                    printf('%s\t%s\t%s\n', ip, duid, hostname);
                }
            }
        }
    }

    conn.disconnect();
}

main();