Convert OPNHome ISC DHCP mappings to Dnsmasq CSV import

convert_opnhome_isc_to_dnsmasq_csv.py

import xml.etree.ElementTree as ET
import csv
import sys

csv_writer = csv.writer(sys.stdout)

# Write header
csv_writer.writerow([
    "host", "domain", "ip", "client_id", "hwaddr",
    "lease_time", "ignore", "set_tag", "descr", "aliases"
])

# Read entire XML config from stdin
xml_data = sys.stdin.read()
root = ET.fromstring(xml_data)

dhcpd = root.find('dhcpd')
if dhcpd is None:
    sys.exit("No <dhcpd> section found in config.xml")

for iface in dhcpd:
    for staticmap in iface.findall('staticmap'):
        mac = staticmap.findtext('mac', '').strip()
        ip = staticmap.findtext('ipaddr', '').strip()
        hostname = staticmap.findtext('hostname', '').strip()

        if mac and ip:
            csv_writer.writerow([
                "",    # host
                "",    # domain
                ip,
                "",    # client_id
                mac,
                "", "", "", 
                hostname,  # descr
                ""     # aliases
            ])