Prototype script to remove delegation with glue records using libknot control interface

knot-remove-delegation.py

#!/usr/bin/env python3
"""
Prototype script to remove delegation with glue records using libknot control interface.
"""

import libknot.control

# libknot configuration
libknot.control.load_lib("/Users/jvcelak/devel/knot/_build.osx/src/.libs/libknot.dylib")
ctl_socket = "/Users/jvcelak/devel/knot/_server/master/knot.sock"
ctl_timeout = 3

# delegation to be removed
zone = "example.com."
deleg = "child.example.com."

if __name__ == "__main__":
    ctl = libknot.control.KnotCtl()
    ctl.connect(ctl_socket)
    ctl.set_timeout(ctl_timeout)

    try:
        # begin transaction
        ctl.send_block("zone-begin", zone)
        ctl.receive_block()

        # get target NS record
        ctl.send_block("zone-get", zone=zone, owner=deleg, rtype="NS")
        data = ctl.receive_block()

        # remove glue records
        for server in data[zone][deleg]["NS"]["data"]:
            if server.endswith(deleg):
                ctl.send_block("zone-unset", zone=zone, owner=server)
                ctl.receive_block()

        # remove delegation
        ctl.send_block("zone-unset", zone=zone, owner=deleg)
        ctl.receive_block()

        # commit changes
        ctl.send_block("zone-commit", zone)
        ctl.receive_block()
    finally:
        ctl.send(libknot.control.KnotCtlType.END)
        ctl.close()