# $Id$
#
# Copyright (C) 2010-2012  Internet Systems Consortium ("ISC")
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.

"""
Parse IANA XML data and write out just what we need to generate a root
cert for Pseudo-RIPE.
"""

import sys
import lxml.etree
from rpki.csv_utils import csv_writer

def iterate_xml(filename, tag):
    return lxml.etree.parse(filename).getroot().getiterator(tag)

def ns(tag):
    return "{http://www.iana.org/assignments}" + tag

tag_description = ns("description")
tag_designation = ns("designation")
tag_record      = ns("record")
tag_number      = ns("number")
tag_prefix      = ns("prefix")

asns     = csv_writer("asns.csv")
prefixes = csv_writer("prefixes.csv")

for record in iterate_xml("as-numbers.xml", tag_record):
    if record.findtext(tag_description) == "Assigned by RIPE NCC":
        asns.writerow(("RIPE", record.findtext(tag_number)))

for record in iterate_xml("ipv4-address-space.xml", tag_record):
    if record.findtext(tag_designation) in ("RIPE NCC", "Administered by RIPE NCC"):
        prefix = record.findtext(tag_prefix)
        p, l = prefix.split("/")
        assert l == "8", "Violated /8 assumption: %r" % prefix
        prefixes.writerow(("RIPE", "%d.0.0.0/8" % int(p)))

for record in iterate_xml("ipv6-unicast-address-assignments.xml", tag_record):
    if record.findtext(tag_description) == "RIPE NCC":
        prefixes.writerow(("RIPE", record.findtext(tag_prefix)))

asns.close()
prefixes.close()